FEX602 - Ch2 - Body orientation and movements. Flashcards

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1
Q

What does Body Language reveal about a person?

A

Reveal voluntary and involuntary, conscious and unconscious motivations, attitudes, intentions, and reactions.

A person has basic posture at rest - return to after deviation - could give info on social relations and structure of interaction

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2
Q

Define Kinesis.

A

Kinesis is the universe of body postures, facial expressions, gestural behaviors, and all those phenomena oscillating between behavior and communication.

(Eco and Volli, 1970)

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3
Q

What is included in the analyses of kinesics?

A
  • Body orientation.
  • Posture.
  • Gestures.
  • Facial Expressions.
  • Eye and Eyebrow movements.
  • Gaze direction.
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4
Q

According to Patterson (2011), how should nonverbal behavior be interpreted?

A

The NV system works coordinated and integrated, with an overall effect greater than the sum of its parts.

Not sought meaning in isolated components such as gaze, but combined information through different channels and contexts.

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5
Q

Define Body Posture.

A

We call posture the disposition of the body or its parts about a given reference system (Corrace, 1980).

This reference system can be another element of the same body, the rest of the body, or the bodies of other individuals.

Posture and gesture are intimately related since they can involve the same body parts. We will treat posture as static since a posture endowed with movement would be treated as a gesture.

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6
Q

How does status influence posture use?

A

Higher status - less rigid rules, presenting a wider range of postures than lower-status subjects.

Goffman (1961) - postural rules study in psychiatric hospital.

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7
Q

Differentiate between dominant-superior and submissive-inferior postures.

A

The difference between dominant-superior and submissive-inferior postures - an upright posture with the head throwing back (haughtiness) and the hands on the hips (desire to occupy more space), could be interpreted as a desire for domination.

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8
Q

Is body posture voluntary or involuntary?

A

The posture adopted is mostly involuntary and can intervene to a greater/lesser extent in the communication process.

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9
Q

Name some revelations on attitude observed through posture and body movements.

A
  • Posture and body movement often reflect emotions.
  • Posture reveals the attitude, confidence, or self-image of the subject.
  • Posture less controllable than face or voice intonation. It can reveal anxiety when masked by facial expressions.
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10
Q

Discuss Mehrabian’s (1977) revelations on the Tension-relaxation dimension.

How does posture communicate valuable info on the subject’s attitude towards a possible interaction or as nonverbal indicators of the subject’s status or power?

A

-Three observations of the attitude of the receiver through posture.

  1. Received of high status - receiver more tense if from lower status.
  2. Positional signs of relaxation - the asymmetrical position of joints, the oblique or reclining inclination, and the relaxation of hands and neck, which would denote positional relaxation.
  3. Positive attitude towards receiver - observed physical proximity, more intense eye contact, and forward leaning.
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11
Q

Describe an open attitude towards interaction.

A

Posture - relaxed arms, feet directed towards the person interacting with, frontal orientation, and direct eye contact.

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12
Q

Describe a closed or rejecting attitude towards interaction.

A

Posture with closed arms, titled body, or averted gaze.

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13
Q

Describe posture that communicates power or status.

A

Expansive postures, trying to occupy more space, e.g., arms in a jug, on hips.

Arrogant postures, e.g., chin raised, eg).

Proud postures, e.g. chest puffed out and back curved backwards.

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14
Q

Name the four postural categories according to Mehrabian (1968).

A
  1. Approach Postures.
  2. Withdrawal Postures.
  3. Expansion postures.
  4. Contracted postures.
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15
Q

Explain ‘approach postures’.

A

Approach postures transmit attention or interest, shown by the body’s inclination forward.

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16
Q

Explain ‘withdrawal postures.’

A

Withdrawal postures are negative postures of rejection or repulsion, shown by retreating or turning away.

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17
Q

Explain ‘expansion postures.’

A

Expansion postures are proud, arrogant, haughty, or contemptuous postures, shown by the expansion of the chest, an erect or leaning backward trunk, an erect head, and elevated shoulders.

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18
Q

Describe ‘contracted postures.’

A

Contracted postures include depressed or crestfallen postures, which are communicated by a forward-leaning trunk, a sunken head, slumped shoulders, and a sunken chest.

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19
Q

Which factors are crucial when interpreting postures?

A

The correct translation of most of the indicators and postural categories depends on the context in which they are produced, mediated by other variables such as the person’s sex, age, race, or culture. Different meanings will be attributed when in isolation or in front of other people.

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20
Q

How can body orientation be understood?

A

By body orientation, we refer to the degree of deviation of the legs and shoulders that an individual maintains concerning another individual or other individuals during an interaction.

If the interaction is between two people, the main orientations that can be assumed are
frontal orientation (“face to face”) and lateral orientation (“side to side”).

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21
Q

What information can body orientation provide us on relationships?

(Ricci and Cortesi, 1980)

A

Whether persons are collaborative, friendly, or hierarchical.

Hierarchical: the superior subject will be positioned in front of the inferior.

Collaborative or Close friendship: two subjects will adopt a side-by-side position.

Intimate: Talking face-to-face, bodies facing each other - intimate, not wanting to be interrupted.

Encouraging: When two people hold a conversation in a place such as a party or a meeting and are positioned at an angle greater than ninety degrees, they indicate to other people their willingness to join in the conversation.

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22
Q

How can childhood create a perception of dominance in terms of height?

A

In childhood, we likely associate the greater height of parents and adults with people in authority. Perhaps because of this, the cultural convention has been established that one person stands taller than another because he or she holds a dominant position over that person.

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23
Q

What are the three groups of body orientation observed by Scheflen (1964)?

A
  1. Guidelines for inclusion or non-inclusion in the group.
  2. Front, side, or angle orientations.
  3. Orientations of congruence or incongruence with the group.
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24
Q

What is gestures?

A

Gestures are different from postures because they are a form of movement.

Including movement of hands, arms, and other body parts - head, trunk, legs, or feet.

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25
Q

Is there a link between gestures and emotions?

A

Gesture is intimately linked to speech and are important in the communication of emotions and interpersonal attitudes.

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26
Q

Explain the interaction of gestures, speech, and synchrony between persons.

A

Body movements are synchronized with speech (autosynchrony).

Body movements of conversational partners can also become synchronized (interactional synchrony), and the listener provides constant feedback to the speaker regarding attention level and interest.

There is considerable controversy over this synchrony in the field (Bull, 2012).

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27
Q

According to Bulle (2012), hoes does gesture and speech interact?

A

Gestures relate to speech in terms of their
- temporal coordination (coinciding with syntactic boundaries and separating important words and phrases) and
- their meaning (conveying meaning through their visual appearance, as with emblems).

Concerning meaning and unlike speech, gestures can simultaneously convey multidimensional aspects of meaning. Thus, for example, a powerful iconic image could convey information simultaneously about the movement of an object, incorporating simultaneous information about speed and trajectory. In contrast, this information would have to be conveyed sequentially through speech.

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28
Q

Which gestures are closely linked to speech?

A

Emblems
Illustrators and
Regulators.

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29
Q

Which expressive channel is believed to be the primary channel?

A

Ekman and Friesen (1969) affirm that the face is the primary seat of emotional expression, calling the nonverbal signals that express an emotion “affect exhibitors.”

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30
Q

Which is the most complex and observed NV Channel?

Caballo (1993)

A

The face is the most important and complex area of the body in nonverbal communication and the part that is most observed during an interaction because it is the main system of signals we possess to show emotions.

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31
Q

Can genuine emotional expression be controlled by an individual?

A

Genuine expression can be
- Attenuated
- Amplified
- Substituted or
- Hidden.

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32
Q

Which gestures are the most difficult to manipulate, according to Morris (1977)?

A

Deliberate control of body parts farther away from the face is given less importance. When trying to control emotion, more focus is placed on facial expression, and less awareness is given to movements farther away from the head.

E.g. the feet.

If a person is nervous and tries to hide uneasiness, he will try to simulate tranquility by controlling the verbal content of what he says and manipulating his facial expression, but the continuous movement
of his feet could be giving him away.

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33
Q

How is power or powerlessness communicated in body posture?

A

Humans, like other animals, express power through open postures, expansive postures;
powerlessness, however, is expressed through closed postures and contracted postures.

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34
Q

Explain James’ (1890) theory on emotion and the ideomotor effect.

A

The ideomotor effect is a psychological phenomenon whereby a subject involuntarily and unconsciously performs movements due to the influence of suggestion or expectation.

Visceral and motor bodily reactions, including FE, are the basis of emotional states.

We are afraid because we ran away, we do not run because we are afraid. Perception of bodily changes (running away) five rise to emotion (fear).

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35
Q

What was found in bidirectional relations between NVB, thought and emotions?

(Carney and Colleagues, 2010)

A

High power poses provoke elevations in testosterone levels (the dominance hormone) and decrease cortisol levels (the stress hormone), increasing a sense of power and risk tolerance.

Individuals adopting low-power poses would exhibit the opposite pattern.

According to these authors, adopting poses of dominance and power for a few minutes provokes physiological and behavioral changes.

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36
Q

In a conceptual replication of the power pose study, Ranehill et al. (2014) found an effect of expansive posture on subjective feelings of power but not on risk tolerance, testosterone, or cortisol. How do Carney et al. (2015) explain this discrepancy?

A

Due to three key differences between the studies.

In Carney’s Studies, the experimental purpose was concealed. Their experiments involved a social task during the postural manipulation, and the postural manipulations used were comfortable, easy to adopt, and of short duration (lasting one minute versus three minutes in the Ranehill et al. experiments), avoiding discomfort, awkwardness, and habituation to the effects of the posture.

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37
Q

What is the main criticism of the power posture research?

A

Failure to determine whether the blinded method was used since the impact of the experimenter and the pervasiveness of expectancy effects are key variables to be controlled.

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38
Q

Who is considered the pioneer in gesture-meaning research?

A

David Ephron (1941).

Observations on the NVB of Jews and Italians in New York.

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39
Q

What was found between the gestures of first-generation immigrants and their descendants?

A

Ephron (1941) found behaviors were different in first-generation emigrants but uniform in their descendants, who exhibited fewer gestures specific to their origin group.

Individuals exposed to the influence of several different groups in their gestures adopt and combine the gestural behaviors of those groups.

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40
Q

What was the basis for Ekman and Friesen’s (1969, 1972) kinesthetic categories?

A

Ephron (1941) established a typology of gestures, the basis for Ekman
and Friesen (1969, 1972) establish the well-known five categories of kinesthetic behavior according to their origin, use, and codification.

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41
Q

What are the categories of kinesthetic behavior (Ekman and Friesen, 1972)?

A

Classify kinesthetic behavior according to origin, use, and codification.

Categories refer to the movement of body parts but focus on hand gestures.

Categories are:
1. Emblems
2. illustrators.
3. Regulators.
4. Display of affection and
5. Adaptors.

Gestures are not confined to one category; they could belong to more than one category.

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42
Q

What are emblems?

A
  • non-verbal behavior with specific meaning - can be translated into words.
  • emitted consciously and intentionally.
  • Function - purely communication.
  • Used as an alternative to voice communication when it is difficult/impossible to speak, at a great distance, by agreement, to emphasize verbal (hand indicates phone against ear when saying please/I will call) or ironic contradiction of verbal message.
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43
Q

Who usually knows the precise meaning of an emblem?

A

Group, Social class, subculture, or culture - know the meaning of emblems used in their circle.

Emblems often insult and often at a distance, maybe to give space to escape.

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44
Q

Which part of the body is used for emblems?

A

The whole body could be involved, but most often, hands, head orientation, facial musculature movements, or posture are involved.

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45
Q

Explain the meaning of ‘emblematic slips’.

A

If a person does not want to use an emblem but does so unconsciously.

E.g., shake your head no but say verbally yes (or vice versa).

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46
Q

Explain how emblems are culture-specific or universal.

A

Eyebrow flashes for a brief duration - usually greeting.

Waving hand - greeting, farewell.

Hand over mouth - hunger (some countries).

Tilting the head to the side and another hand as a pillow - sigh to sleep.

It can be problematic when the same gesture has different meanings in different countries and cultures - eg, index finger and thumb make a circle and the other fingers up like a three:
- OK in the US/UK
- Money in Japan
- Obscene sexual insult in Italy or Brazil (anus)

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47
Q

What is meant by Illustrators or illustrative gestures?

A

It is exclusively used by the sender but cannot be directly translated into verbal meaning, although it accompanies speech.

Illustrators - gestures emitted consciously or intentionally.

Facilitate - repeating successive parts of speech or fx as a punctuation system,
- other time - amplify content by describing spatial relationships
- or draw shapes of objects.
- can contradict verbal or
- be used as a substitute for words.

For example, you might use hand gestures to indicate the size or shape of an object. Unlike emblems, illustrators do not typically have meaning on their own and are used more subconsciously than emblems.

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48
Q

Frequency of illustrators depends on the state of mind and existing problems in verbal communication. How does use decrease or increase?

A

ILLUSTRATORS TEND TO DECREASE:

Suppose a person is demoralized, discouraged, tired, unmotivated, worried about the impressions he or she will make on the other person, or has a non-dominant role in a formal interaction; the rate of illustrators will be lower than is usual for that person.

ILLUSTRATORS INCREASE:

When there is interest, passion, and enthusiasm for the topic or communicative process, when they are perceived to be in a dominant role in formal interaction, or when there is little concern for impression during information interaction, illustrators tend to increase.

Illustrators increase if a person lacks words or perceives that the listener does not understand.

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49
Q

List the 8 types of illustrators.

A

Classification, according to Ephron (1941):
1. Batons.
2. Ideographs.
3. Deictic movements.
4. Spatial movements.
5. Kenotographs.
6. Pictographs.

Added by Ekman & Friesen (1971):
7. Rhythmic movements.
8. Emblematic movements.

50
Q

What are Baton Illustrators?

A
  1. Batons - movements that mark rhythmic characteristics of the message and are usually used to emphasize a word or phrase.
51
Q

What are ideograph illustrators?

A
  1. ideographs - movements that graphically show the speaker’s path or line of argument.
52
Q

What are deictic movements?

A
  1. Deictic movements—illustrators use deictic movements to physically point out an object, a place, or an event mentioned in the message.
53
Q

What are spatial movements?

A
  1. Spatial movements - illustrators describing spatial relationships.
54
Q

What are kinetographs?

A
  1. Kinetographs - movements that describe bodily or non-human physical actions.
55
Q

What are photographers?

A
  1. Pictographers - illustrators who trace the image or form of what they refer to.
56
Q

What are Rhythmic movements?

A
  1. Rhythmic movements - movements that describe the rhythm or pace of an event.
57
Q

What are emblematic movements?

A
  1. Emblematic movements - emblems used to illustrate a verbal statement by repeating or substituting a word or phrase.
58
Q

Explain the overlap of gestures.

A

Gestures can be an emblem or illustrator, depending on use and context.

Illustrators can also be regulators when they manage the flow of a conversation.

59
Q

How do children learn and use illustrators?

A

Emblems and illustrators are probably learned before language is developed and are used to communicate with adults when they lack words.

E.g. pointing.

60
Q

How do illustrators emphasize verbal or lack of verbal content?

A

Using illustrators when experiencing clumsiness of thought or speech.

When you say “big” and stretch your hands wide in front of you, that’s an illustrator. Or if you place your palm up in front of you while making a point, that’s an illustrator. We use these types of gestures to add to the meaning of our words.

61
Q

How does gestural accompaniment to speech facilitate lexical access?

(Rauscher, Krauss and Chen, 1996)

A

Speakers were videotaped while describing cartoon actions and whether or not they were allowed to gesture. When they could gesture, they did so more often during sentences with spatial content than during sentences with other types of content, and when they could not gesture, their speech with spatial content became less fluent.

The limitation of gestures led to an increased relative frequency of pauses due to the increased difficulty of accessing the lexicon by other means, such as gestures.

62
Q

How was it found that gestures reduce the cognitive load during speech (especially about maths)?

Goldin-Meadow and coworkers (2001)

A

They designed a study in which they asked children and adults to recall a list of words or letters while explaining how they solved a math problem.

Both groups remembered significantly more items from the list when they gestured during their explanations because gesturing reduced cognitive resources required in the memory task.

63
Q

Name three findings on the use of spontaneous gestures.

A
  • spontaneous gestures accompanying speech play an active part in learning.
  • Help children learn by creating new ideas about mathematics
  • spontaneously produced bystander gestures during research interviews convey substantive information while
  • interviewers’ gestures serve as a source of information
64
Q

What is the purpose of regulator gestures?

A

Regulators aim to regulate and control the flow of a conversation.

  • Regulate synchronization of interventions during the conversation.
  • Indicate the speaker whether the listener is interested in transmission and if he/she wants to intervene/interrupt the speech.
65
Q

Explain the stopping gesture as a regulator of a conversation.

A

Continuous gesticulation can interrupt or stop the speaker.

  • Stopping gesticulation - The main key to cede speaking turn to another person.
  • complete sentence.
  • Increase/decrease the pitch at the end of the sentence.
  • Accent on final syllable or expression … but, uh, do you know …
  • Gaze turning - the sign of interest in another conversation.
66
Q

Explain how gaze affects a conversation in different cultures.

A

Euro-Americans tend to look directly at their interlocutors when they are receivers as a sign of interest in the conversation.

African-Americans prefer to avert their gaze and consider the behavior of Euro-Americans as an insinuation of confrontation or confrontation.

67
Q

Explain how ‘signs of affection’ convey emotions and feelings.

A

Signals of affection are mainly expressed through body movement (posture) and face movements, but certain gestures can also reveal emotions. They are intentional or unintentional and subject to cultural norms.

68
Q

Which two emotions illicit recognizable signs of affection?

(Ricci and Cortesi, 1980)

A

Anxiety and anger (emotional tension) provoke recognizable changes in movements.

E.g., swinging a fist when angry or swinging a hand up and down when anxious.

69
Q

How can affection signals be intentional or unintentional?

A

INTENTIONAL: smiling at someone.
UNINTENTIONAL: Blushing, paling, pupillary dilation.

70
Q

Explain how affection gestures can be cultural.

A

In China, the gestures are shorter than in European cultures.

71
Q

What are adapters?

A

Nonverbal behaviors arise mainly to adapt to a situation, satisfy a bodily need, or handle and manage emotions in reaction to a physical or psychological state.

Self-regulatory gestures.
From ontogenetic past - remain from patterns that had an adaptive function in early life.
Usually performed unconsciously.
Not intended to communicate information to another.

The function is usually to obtain security or dominance.
Triggered by motives or effects that are being verbalized or by discomfort or anxiety provoked by situation/conversation.

72
Q

How is nose-picking an adaptive gesture?

A

When alone, will be carried out completely.
When observed, one might aim or touch the nose but stop - thus, the occurrence of adaptations is reduced or fragmented.

73
Q

What is meant by ‘manipulators’? (Ekman, 2009)

A

All those movements were on the part of the body: massages, rubs, scratches, grabs, pokes, pinches, squeezes, accommodates, or otherwise manipulates another part of the body.

Brief manipulators - performed with purpose - scratching body parts, tidying hair.
Longer manipulators - rubbing fingers, rhythmically tapping foot.
Other manipulators include the tongue against the cheek, teeth lightly biting the lip, and the leg against another.

74
Q

When do manipulators increase?

A

When a person feels anxious or upset.

75
Q

What are the three types of adaptors of manipulators?

A
  1. intrapersonal or self-adaptors.
  2. interpersonal adaptors or hetero adapters.
  3. object-directed or object-adapters.
76
Q

Explain what ‘self-adaptors’ means.

A

Gestures or actions we perform on ourselves; movements of manipulation of our own body.

Appear - situation of tension or anxiety, attempt to seek security or face uncomfortable situations.

Examples:
- slightly scratch face/body
- run fingers through hair
- biting nails
- pinching
- crossing arms
- squeezing one hand with another
- Often adaptors that block a sensory input - hand before/at the mouth, ear, etc.
- Covering one’s sight with one’s hand reveals the desire not to be seen or to hide out of shame.

77
Q

What are the different descriptions for Ekman’s ‘self-adapters’?

A

Self-manipulators (Rosenfeld, 1966)
Autistic gestures (Mahl, 1968)
Body-centered gestures (Freedman and Hoffman, 1967)

78
Q

How do self-adaptors function in a conversational situation?

A
  • Individuals are usually unaware of the performance of self-adaptor.
  • Rarely receive attention or commentary - except parents to children, e.g., “Don’t bite your nails.”
  • Usually break eye contact when displaying self-adaptive behavior and resume when complete - e.g., scratching nails, rubbing ear, etc.
79
Q

What is understood as ‘interpersonal adapters or hetero adapters’?

A

Involve prototypical interaction strategies - movements of approach, courtship, intimidation, aggression, protection or flight.

e.g. - hair tying, seductive gestures, tie knotting, jacket straightening.

80
Q

Object adapters usually appear when trying to cope with uncomfortable or stressful situations. How do they differ from self-adaptors?

A

Behavior usually involves manipulating an object - a pen, cigarette, ball of paper, cleaning a surface, moving chairs, etc.

Not to be confused:
Scribbling with a pen and taking notes.
Playing with a cigarette or smoking.

81
Q

Explain the classification of gestures according to Rosenfeld (1966).

A

Different to Ekman - two categories:
1. Self-manipulation.
2. Gesticulation.

82
Q

How did Freedman and Hoffman (1967) classify gestures?

A

Gestures are classified as movements
1. Movements centered on objects and related to discourse.
2. Movement centered on the body and unrelated to discourse.H

83
Q

How did Mahl (1968) differentiate between gestures?

A

Mahl (1968) differentiates between -
1. Communicative gestures and
2. Autistic gestures.

84
Q

How does Argyle (1975) divide gestures?

A

Argyle (1975) states that gestures are divided into movements and signs.

  1. illustrative gestures and signs linked to language.
  2. Conventional Signs.
  3. Sign language.
  4. Movement that conveys emotions and interpersonal attitudes.
  5. Movements that express aspects of personality.
  6. Movements used in rituals and ceremonies.
85
Q

Explain the significance of Barrier Adapters.

A

Behavior that appears when feeling uncomfortable, stressed, or in risky situations - behaviors of concealment and protection.

  • Hands crossed in front of crotch or protecting vital organs - make men feel safe when threatened. It is more prevalent in men than women but not exclusive.
  • Children hide behind barriers - behind parents, in a cupboard - when they feel threatened.
  • Crossing arms over the chest when threatening situations arise. Monkeys and chimps make similar unconscious attempts to block perceived threats to protect themselves from frontal attacks.
86
Q

How can crossing arms over the chest be misleading? Why is the context of interpretation important?

A

This gesture is often adapted when feeling nervous, negative, or defensive.

It could also be cold to hide a spot, to highlight the biceps, to enhance the chest for comfort.

Often arise to satisfy a need to feel more comfortable (reaction to physical or psychological state).

Crossed arms is an attempt to look more comfortable with a negative, nervous, or defensive attitude.

87
Q

How is crossing arms (barrier adapters) interpreted as a global assessment?

A
  • Crossing of arms - interpreted by the context in which it occurs.
  • What does facial expression denote?
  • Degree of tension observed in limbs?
  • other gestures - closed fists or extended fingers?

McNeill - Hand and Mind (1992) - “the meaning of the parts of a gesture are determined by the whole.”

88
Q

Explain the purpose of the barrier adapter to cross one’s legs.

A

Crossed legs are vital for survival - easier to flee, stop, or attack.
- Reveal a closed, submissive, or defensive attitude (Allan and Pease (2006).
- Open or uncrossed legs - open or dominant attitude.
- Closure at ankles - could indicate discomfort.

Again - context is important.

89
Q

Elaborate on the use of ‘subtle adaptors’ to mask insecurity or nervousness.

A

Subtle adaptive Gestures are applied to project a calm and controlled attitude, masking indicators of nervousness or insecurity.

Crossing arms in front of the body, making adjustments to the cufflink, bracelet, watch, and touching the bottom of the cuff of the jacket, or any object on the other arm.

90
Q

Give examples of subtle adaptors.

A

A mixture of insecurity and nervousness would include those self-adapters in which the hands comb the hair, touch the lips, or in which the subjects bite their fingernails, insert a finger in their mouth, etc.

Women - often hold onto a handbag, folder, or even flowers.

Men fixing a jacket or clothing.

91
Q

How can nonverbal behavior be analyzed?

A

By biomechanics and kinesiology (Hinson, 1977).

92
Q

Define ‘biomechanics.’

A

Biomechanics is the Science that examines the internal and external forces acting on the human body and the effects produced by them.

Relies on biomedical and technological sciences.

93
Q

Define ‘kinesiology.’

A

Kinesics is the branch of physics that studies the laws of motion, position, and trajectory. It includes dynamics, which is part of mechanics, and studies the relationship between motion and the causes that produce it.

Thus, kinetics is a motion itself and static, the equilibrium.

94
Q

According to Birdwhistell (1970), what is kinesiology?

A

Kinesiology is the science that studies movement.
It is a set of sciences that seeks to analyze the structure and function of the human body’s musculoskeletal system.

(Birdwhistell, 1970)

95
Q

How can the movement of the body be studied, according to Bull(1987)?

A

The body’s movement can be studied with special reference to both the postures of the body and the kinetics (movement) of the body itself.

96
Q

What do the movement and posture tell us about a person?

A

The special interest in body movement analysis is contributed to by information relayed by a person’s movement and posture, action and intention, affection or mental state, and attitude towards the circumstances they interact with.

(Wallbott, 1998)

97
Q

How does the state of consciousness reveal information on body movement?

A

Body movement can be conscious and unconscious, becoming automatic (such as walking).

External manifestations can be individual - such as frustration or aggression, through interaction with others in situations of dominance, turns, or interruptions.

98
Q

Explain how body movement can be measured (qualitatively and quantitatively).

A

Qualitative (coding) and quantitative (capturing movement).

99
Q

Explain the process of coding body movement.

A

Qualitative measurement

Usually done manually, through observers collecting and coding specific behaviors, with possible existing bias, and by analyzing the frequency of different behaviors over time.

During coding, all interpretations should be included.
Irrelevant movements should be ignored.

Fundamental - the coding scheme must be known in advance and require analysis.

Coding body movements is qualitative in nature—there will, therefore, be differences in speed, direction, and shape that might require additional coding.

100
Q

What is the objective of body movement measurement?

A

The objective is an automatic, rapid measurement.
Carried out with minimum effort and maximum objectivity.
Being as quantitative as possible leads to minimizing the interpretation of behavior.

101
Q

Who are considered the fathers of biomechanics?

A

Aristotle (330 BC) and Plato - wrote about body segments, animal movements, and displacement.

Aristotle claimed that movement is produced by interaction with the ground.

He wrote works such as “On the motion of animals”, “On the gait of animals” or “On the parts of animals”

101
Q
A
102
Q

Discuss studies of Leonardo da Vinci (1500) concerning body movement.

A

Leonardo da Vinci (1500) studied flight and the laws of the aerial and
aquatic environment. T

In his Man of Vetrubio, we can observe the work of the first biomechanical scientist. His observations of human movement surprisingly fulfilled Newton’s third law (Klette and Tee, 2008).

103
Q

Give an overview of Eadweard Muybridge’s photographs of human and animal movement.

A

In the 19th century, Eadweard Muybridge (1831-1904) photographed human and animal movements.

With the recording and analysis of any event (from a horse race to the gait of a child with cerebral palsy or the performance of a high-performance athlete), biomechanics (motion analysis) has progressed rapidly in the 20th century.

104
Q

How did biomechanics evolve in the 20th century?

A

Etienne Jules Marey (1830-1904) carried out chronocyclic photography of human movement.

Several authors used the photographic rifle (1882), first the manual one and then the electricone (1899).

Braune and Fischer carried out the first 3D kinematic analyses between 1895 and 1904, studying human gait in different sports.

In 1887, Moritz Benedikt used the word biomechanics for the first time in a scientific seminar in Germany.

Later, Nicholas Berstein (1896-1966) focused on the study of the efficiency and coordination of different movements, postulating several theories on motor control.

Muybridge (1887) in the USA shot 24 cameras sequentially to record a man’s walking and running patterns.

105
Q

What does Biomechanics describe?

A

Biomechanics describes movement (the adaptation of movement of the human body) by describing characteristics of the environment and its interaction with the human being.

(Hindson, 1977; Neuman, 2002).

106
Q

What does the study of Biomechanics entail?

A

Biomechanics is the study of control of our movements.

Deal with processes from the moment we decide to move until the muscles required are activated to perform the moment.

(Harrigan, 2005)

107
Q

Describe the kinematic tree.

A

The body can be represented as segments and joints (Kipp, Neff, and Albrecht, 2007).

Segments are the parts of the body that have a given length, and joints connect these segments. Upper limb control involves the hierarchical regulation of several body segments, in which the movement of each joint is a function of the movements of other joints.

Thus, movement occurs in the more than 200 joints humans have, most of them in the back, hands, and feet.

All the joints together form a kinematic tree, with the segments connected by the joints at each tree end (Bänziger, Mortillaro, and Scherer, 2012).

The root joint is at the top of the tree, and these joints are the highest in the tree, which affects the continuation of the chain.

The joints can move in different directions, and each direction contains one degree of freedom (DOF), and each joint can have up to 3 DOF.

The joints rotate around axes, and each axis has one possible motion feature. This range is limited by restricted rotation. The DOF, with constraints, determines the range of motion.

108
Q

Summarise the description of body posture.

(Kipp et al., 2007; Laban, 1956, 1975)

A

A body posture can be described by the engagement of all joints, and a body movement will be produced by the change of position in a room by the movement of all joints. In this way, the initial global location will depend on the origin arranged in the room as a reference, using the position in space and the localized body posture. A local joint location, i.e., relative to a part of one’s body, can also be taken as a reference (Kipp et al., 2007; Laban, 1956, 1975).

The difference in posture lies in the distance between all pairs of joints since movement corresponds to body postures over time. Thus, by averaging the distances over time, we can calculate the average movement. This can be done for the whole body or per joint/limb.

109
Q

Briefly discuss the various models/devices identified to measure body movement.

A

We found different models.

One of the best-known is the Animazoo Gypsy 5, which has sensor suits that measure angles and extension. The measurement is direct and allows the control of several actors at the same time. Its main drawbacks are the difficulty of preparing it for use and the limited number of joints, which limits freedom of movement.

The Vicon MX uses retroreflective markers attached to a suit or through straps. This system gives greater freedom in marker configuration. Many cameras are required for recording, with the most important limitation being that the markers can be easily interchanged or fall off.

The Xsens MVN consists of sensors with gyroscopes in straps that allow the use of large stage space and outdoor recording, even with multiple actors.

Depth cameras, such as the Microsoft Kinect, Asus Xtion, or PrimeSense, are also used for body motion notation. They avoid on-body sensors but have relatively low accuracy, difficulties with direct sunlight, and limitations in stage space (Bente, Krämer, Petersen, and de Ruiter, 2001).

110
Q

What factor of NVB should be considered when conducting biomechanical analysis of body movement?

A

The body does not only show emotions but also the intensity of the emotional experience.

Posture as a whole is important, including specific parts, such as hands.

111
Q

How did Laban (1956, 1975) study automatic recognition of body expressions?

A

Studying speed, strength, smoothness, and tension produced in the movement enabled automatic recognition of body expressions.

112
Q

How can a coding system be developed to measure body movement and related emotional expression?

A

By analyzing each movement performed and measuring the separation of movement - how long does it last, and how long is the segment?

These are divided into submovements for better analysis.

This way, a coding system is developed to provide a systematic and reliable description of body movement with a specific focus on the bodily expression of emotion.

113
Q

What is BAP?

A

BAP is a Body Posture Coding System - based on movement patterns.

Designed by 10 actors and identify a total of 17 emotions.

It consists of a manual that defines the emotions represented and the different rules for performing the coding.

These body movements represent the different emotions
(GEMP) (Bänziger and Scherer, 2010) are recorded using the ANVIL software (Kipp, 2007), which uses a double camera, front and side, with a medium plane (up to the actor’s knee) and allows their analysis to follow scientific criteria (Kipp. 2007).

114
Q

How should the analyst compensate for observer bias when conducting a body movement analysis?

A
  • Be aware of biases.
  • Limit to a minimum by working with a manual at all times.
  • Understand definitions.
  • Do not code if in doubt.
  • Code in an orderly manner - one joint at a time in the case of multi-joint movement.
  • Focus on one joint for each analysis.
  • Differentiate the actual joint for the artifact (or segment).
  • Distinguish between posture and action.
  • Clearly indicate the direction of movement.
  • Record time points.
115
Q

How does BAP code posture?

A

Posture coded with BAP will be described as:
- Head orientation,
- trunk orientation,
- General posture,
- Arm posture and
- Gaze.

Coded behavior ranges from head movement to trunk movement to arm movement (Dael, Mortillaro, and Scherer, 2012).

116
Q

How can we define a ‘posture unit?’

A

The posture unit is made up of the union of the posture of the head, trunk, and arms.

Encoding movement by joints -
- neck,
- trunk (through spine and chest),
- shoulders,
- elbows,
- wrists and
- fingers (for each of the arms) then
- knees and hips for lower extremities.

117
Q

Explain how body movement encoding is done with biomechanics programming.

A
  • Encoders work simultaneously with video images - front images and side images.
  • No voice/sound.
  • Video observed at normal speed and reduced speed.
  • Look for examples of interest, irritation, despair, anxiety, fear, panic, anger, euphoria, joy, pride, pleasure, sadness, relief, or amusement.
118
Q

How is the measurement of body movements developing?

A
  • Booming field of research.
  • Should not only measure but also understand body behavior.
  • Currently reaching increasing quantitative analysis.
  • Through increased study of behavior variability between subjects, movements should become anticipated and predictable.
  • Virtual characters and robots are used in research with great success.
  • Movies and video games are also incorporated in research and analysis.
119
Q

What is the future of body movement notation?

A

Through robots, movies, and video games, we can achieve correct analysis of body movement notation and the emotions conveyed by it.

120
Q

What does body movement tell us about a person?

A

Posture and body movement tell us
- about actions and intentions of a person;
- his/her affection or mental state;
- attitudes towards circumstance living/dealing in.

121
Q

How can body movement interpretation be applied globally?

A

Understanding posture and movement in different cultures can increase safety programs for a globalized world.