ERGO PRELIM (M1-M5) Flashcards
“ENGINEERING PSYCHOLOGY”
The Human work above the _______
Neck
The focus of ________ tends to be on PERFORMANCE ON THE WORKPLACE, hence characterizing its close linkage back to ergonomics, the study of work, and particularly COGNITIVE
ERGONOMICS.
Engineering Psychology
(GIVE 3)
The scientific study of _______, _______, and ________ applied to the design of equipment, workplaces, environments, jobs, instructions, interfaces, systems, and processes.
Human Characteristics
Capabilities
LImitations
_______. The size, shape, surface-type and weight of the object being moved
Load
under LITE
________. The type of manual handling activity such as pushing, pulling, lifting, or carrying, etc.
Task
under LITE
________. The area in which the object is being moved
Environment
under LITE
________. The capabilities ofthe person carrying out the manual handling activity
Individual
under LITE
Engineering Psychology typically measures the “Big three”. Which are???????????
– Speed
– Accuracy
– Attentional demand
(Give 3)
Engineering psychologists are quite interested in many cognitive phenomena that are not directly
reflected in performance, such as the degree of learning or memory of a concept, the quality of
________, _________, _________ in a decision.
– mental model
– situation awareness
– overconfidence
Acronym: MSO
It is a systematic application of relevant information to design and evaluation of things
Human Factors Research Methodologies
True or False:
All the Human Factors Research Methodologies’ information come from materials and conclusion.
False
Specific words:
“Observation” and “Experiment” daw.
observe system in natural state. AKA _______
Observation
manipulate system and observe outcomes. AKA ______
Experiment
_________ is that which informs, i.e. that from which data can be derived
Information
_________ is conveyed either as a content of a message or through direct or indirect observation of something.
Information
Enumeration:
Give 6 types of Information
▪ Quantitative (e.g. 100% charged, 63% used)
▪ Qualitative (e.g. fully charged, partially charged)
▪ Status (normal, abnormal)
▪ Warning (abnormal - - potentially dangerous)
▪ Representational (e.g. pictures, diagrams, charts)
▪ Identification (e.g. labels, proofs)
QQ - SW - RI
Who developed information theory?
Claude E. Shannon
______ was developed to find fundamental LIMITS on SIGNAL PROCESSING operations such as compressing data.
Information theory
Start by an environmental input or operator’s voluntary intention to act.
System Environment
________ draws knowledge from statistical inference, natural language PROCESSING and other forms of DATA ANALYSIS
Information theory
Short-term sensory store: All sensory systems have an associated STSS to prolong the representation of the raw
material for _____min or ____ sec.
0.05 mins
or
2-4 seconds
______ permits environmental information to be preserved temporarily and dealt with later.
Short term sensory store
True or False:
Familiar circumstances remove the ability to use past experiences.
False
“Unfamiliar” circumstances
True or False: Poor sensory quality forces the perceiver to use bottom-up expectancies.
False:
“Top-down” expectancies
True or False:
If such expectancies are wrong, perceptual errors can occur
True
WHAT PART OF THE HUMAN INFORMATION PROCESSING?
________ proceeds automatically and rapidly, and is driven both by sensory input (bottom-up processing) or by inputs from _________ memory about what events are expected.
— Perception
— Long term
_________ refers to processing sensory
information as it is COMING IN. In other words, if a random picture is flashed on the screen, your eyes detect the features, your brain pieces it together, and you perceive a picture. It also refers to the way it is built up FROM THE SMALLEST pieces of sensory information
Bottom - up processing
________ refers to perception that is DRIVEN BY COGNITION. Your brain applies what it knows and what it expects to perceive and fills in the blanks, so to speak.
Top - down processing
TRUE OR FALSE:
If there is no context to give it a specific meaning, there is no top-down processing involved. Thus, your brain engages in bottom-up processing
TRUEE
Cognition operations require greater time, mental effort, or attention through rehearsal, reasoning, or image processing using _________.
working memory
TRUE or FALSE:
When given a context, your perception is driven by your cognitive expectations. Now you are processing in a bottom-up fashion.
FALSE: Top-down fashion
Pag may context, matic top down
True or False
We all have memories and one way to understand them is to use them under controlled conditions.
Ture
WHAT PART OF THE HUMAN INFORMATION PROCESSING?
Understanding of a situation, achieved through perception and augmented by cognitive transformations, often triggers an action.
RESPONSE SELECTION AND RESPONSE EXECUTION
WHAT PART OF THE HUMAN INFORMATION PROCESSING?
Cognition operations require greater time, mental effort, or attention through rehearsal, reasoning, or image
processing using working memory
– Working Memory Cognition
– Long term Memory
WHAT PART OF THE HUMAN INFORMATION PROCESSING?
Short-term sensory store: All sensory systems have an associated STSS to prolong the representation of the raw
material for 0.05min or 2-4 sec. STSS permits environmental information to be preserved temporarily and dealt with later
Sensory Processing STSS
_____ describes decisions made under uncertainty. It distinguishes between different types of errors or successes, and describes the tradeoffs between
them.
Signal Detection Theory
What are 4 PARTS OF THE SIGNAL DETECTION? Enumerate
– Stimulus
– Signal
– Noise
– Task
SSNT
Under PARTS OF THE SIGNAL DETECTION
______: sensory input(s)
Stimulus
Under PARTS OF THE SIGNAL DETECTION
______: stimulus having a special pattern
Signal
Under PARTS OF THE SIGNAL DETECTION
______: Obscuring stimuli
Noise
Under PARTS OF THE SIGNAL DETECTION
_______: Report “yes” when signal present, otherwise “no”
Task
For reading:
Example of Signal Detection
Situation: steam power plant
task: detect boiler leak
stimulus: sound pressure level (SPL)
signal: higher than normal SPL
Noted
______ is a graphical plot of how often false alarms (x-axis) occur versus how often hits (y-
axis) occur for any level of sensitivity
Receiver Operating Characteristic Curve
2 questions in 1
The Sensitivity of d’ is captured by the _______ in the curve.
True or False
The more the curve bends down to the left, the better the sensitivity
– Bow
– False
Must be: The more the curve bends UP to the RIGHT, the better the sensitivity.
True or False:
When humans detect signals, they make a simple three alternatives along a sequence of sensory evidence
However, when humans must identify or classify three or more stimuli at different levels of sensory evidences, this task is called _________.
– False: Must be “Simple 2 alternatives” hindi three
– Absolute judgment
_______ is an example of a task in which the human transmits
information from stimulus to response
An observer assigns a stimulus into one of multiple categories along a __________
Absolute judgment
Sensory Dimension
An information can be expressed in terms of_______, simply equal to the base 2 logarithm of the number of possible events
bits (binomial digits)
If EIGHT events could possibly occur, how many bits of information we will obtain in the stimulus?
Hs = Log_2(8)= 3 bits
3 bits of info obtained
Trivia:
A completely certain or predictable event conveys Hs = log2 1 = 0
When the amount of TRANSMITTED information is less than the STIMULUS information (HT < HS), it is known as __________
Information loss
When _____ discriminable stimuli are presented, information transmission (HT) is usually perfect
four
True or false:
When we increase the number of discrete stimulus levels (more than 4), error rate increases. This suggests the idea that every subject has a maximum channel capacity
True
Edge Effect is the ____-degree slope of the dashed line
indicates perfect information transmission.
45
The level of the flat part or asymptote of the function indicates the channel capacity
of the operator: somewhere between how many bits?
between 2 and 3 bits.
Absolute judgments are also subject to the _________: “stimuli located in the middle
of the range are generally identified with ______ (better or poorer?) accuracy than those at the extremes”
edge effect
poorer
There are two types of multidimensional judgments:
which are?
orthogonal dimensions
and
correlated dimensions
true or false
Most of our recognition is based on the identification of one stimulus dimensions rather than levels along a single dimension.
False:
Must be identification of 2 or more stimulus dimensions
The level of the stimulus on one dimension can take on any value, and INDEPENDENT of the other. Such as Hair color and weight
Orthogonal Dimensions
Orthogonal Dimensions
As more dimensions are added, ______ (less or more?) total information is transmitted, but ______ (less or more?) information is transmitted per dimension”
– More
– Less
_____ describes The level on one constraints the level on
another. Example (height and weight.
CORRELATED DIMENSIONS
meaning both variables are DEPENDENT of each other (or they affect each other)
CORRELATED DIMENSIONS
As more dimensions are added, the security
of the channel ________ (decreases or improve?), but ______ (Hs or Ht?) limits the amount of information that can be transmitted”
– Improve
– Ht
The _______________ is:
- An (in) action that was not intended.
▪ An action not desired by a set of rules or an external observer.
▪ An action that led the task or system outside its ACCEPTABLE LIMITS.
Human error
Human error detection is based on what? (Give 3)
✓ Action Based
✓ Process Based
✓ Output Based
mt. “Apo”
For Multidimensional Judgement
-_____________ maximize HT, the efficiency of the channel.
▪ ___________ minimize Hloss; that is, they _______ (maximize or minimize) the security of the channel.
Orthogonal dimensions
Correlated dimensions
Maximize
How does human error occur? (Give 3)
✓ Task Complexity
✓ Error-likely Situations
✓ Individual Differences
In-T-Er (net)
APPROACHES TO MINIMIZE HUMAN ERROR
Appropriate skills and capabilities to perform required tasks
Personnel Selection
APPROACHES TO MINIMIZE HUMAN ERROR
Helps ensure appropriate skills; can be expensive and time consuming; people may revert to original behaviors under stress
Training
APPROACHES TO MINIMIZE HUMAN ERROR
Preferred method; maintainability, displays & controls, feedback (error detection), user expectations; categories: exclusionary, preventative, and fail-safe.
Design
HUMAN ERROR CAUSES
_______ is when the mechanical, electrical or other components of the design has a problem that caused the mishap
Design Deficiency
HUMAN ERROR CAUSES
______ is when the machine operated incorrectly
Equipment Malfunction
HUMAN ERROR CAUSES
______ is when the material or assembly has an issue that causes it to fail
Manufacturing Defect
HUMAN ERROR CAUSES
_____ is when an outside factor such as the weather causes the hazardous
condition
Environmental Hazard
For reading only:
HUMAN ERROR EXAMPLES
▪ Failing to perform or omitting a task
▪ Performing the task incorrectly
▪ Performing an extra or non-required task
▪ Performing tasks out of sequence
▪ Failing to perform the task within the time limit
associated with it
▪ Failing to respond adequately to a contingency
(Tap for more info)
For reading only:
HUMAN ERROR CONTRIBUTORS
▪ Population stereotype
▪ Performance requirements that exceed human
capability
▪ Design that promotes fatigue
▪ Inadequate facilities or information
▪ Difficult tasks
▪ Dangerous tasks
▪ Unpleasant tasks
▪ Repetitive or boring tasks
▪ Tasks at odds with the person’s aptitude
▪ Stress, Illness, Sleep Deprivation, Injury
Formula for reaction time?
Reaction Time = Response time (Hick-Hyman Law) + Movement Time (Fitts’ Law)
_______ describes that more choices lead to slower decision-making
Hick - Hyman’s Law (more on response time)
______– states that the size and distance of options influence users’ movement time
Fitts’ law (more on movement time
What are the 7 VISUAL CAPABILITIES?
▪ Color discrimination and perception
▪ Accomodation
- Mobility
▪ Contrast sensitivity
▪ Adaptation
▪ Perception
▪ Visual acuity
CAM - CAP - V
______ describes The whole different than the sum of its parts
GESTALT PERCEPTION
individually, di mo kayang idescribe yung image. but if in group, nadedescribe mo yung image
For reading only:
GESTALT GROUPING PRINCIPLES
– Proximity or nearness (.. .. ..)
– Similarity ([][][])
– Uniform Connectedness (their connection creates a pattern daw)
– Good continuation
– Common Fate / Symmetry (yung nakikita sa wooden chair)
– Closure (Grouped pieces form an image)
(click for more info)
For reading only:
PICTORIAL PERCEPTION
– Depth (Lumalalim yung pic)
– Aerial Perspective
– Shading or Lighting
– Elevation (Nakatungo sa ground, yet di kita sky)
– Relative Size
_______ is the result of the relation between stimuli, rather than stimuli themselves.
Perception
True or False:
When conflicting or simultaneous information occurs through the different senses, the visual system often determines what we perceive.
true
Initial decision in display design is to use _____ or _____ displays
visual
auditory
Types of Displays
Indicates existence of a condition
Example: Flash or No Flash symbol sa camera
Check Display
Types of Displays
Indicates an exact numerical value that must be read or that must be determined.
Example: may nakalagay na 50% sa battery charge
Quantitative display
Types of Displays
Indicates status, approximate value or trend of a changing value
Example: Wifi Symbol bumababa signal, Graph arrow umaakyat
Qualitative displays
Types of Displays
Used to convey detailed information
Example: use of Serif fonts as texts, Display density should be as low as possible
Alphanumeric Displays
Width height ratio of:
– Black text on white background
– White text on black background
– 1:6 to 1:8
– 1:8 – 1:10
Types of Displays
▪ Convey exact numeric values well
▪ Difficult to read when changing rapidly
▪ More effort needed to determine trends
Example: Timer
Digital Displays
Types of Displays
▪ Extensively used for facilities
▪ Identifiable, as simple and as symmetric as possible
Example: Male Female CR symbols
Symbolic Display
Types of Displays
▪ Convey spatial information and trends effectively
▪ DO NOT provide precise values
▪ Direct depiction of the system state
Example:
yung knob sa stove. you dont know the exact amount of fuel pero you simply estimate based sa pagturn mo nung knob
Analog display
Types of Displays
Evoke immediate attention and requires immediate response
– exclamation point na may yellow bg
Warning and Caution
(same kasi sila definition)
Types of Displays
Evokes general awareness of a marginal condition
Advisory
PRINCIPLES THAT ENHANCE EFFECTIVENESS OF VISUAL DISPLAYS
_______ display should attract attention and located where people would be looking;
prominence, novelty and relevance
Conspicuity
PRINCIPLES THAT ENHANCE EFFECTIVENESS OF VISUAL DISPLAYS
visible under all expected viewing conditions (day or night viewing, bright sunlight, etc.
Visibility
PRINCIPLES THAT ENHANCE EFFECTIVENESS OF VISUAL DISPLAYS
optimize contrast of characters to background, using font types that are easy to read
Legibility
PRINCIPLES THAT ENHANCE EFFECTIVENESS OF VISUAL DISPLAYS
as few words as possible, no acronyms or abbreviations, telling exactly what to do
INTELLIGIBILITY
PRINCIPLES THAT ENHANCE EFFECTIVENESS OF VISUAL DISPLAYS
important words, larger fonts and borderlines
Emphasis
PRINCIPLES THAT ENHANCE EFFECTIVENESS OF VISUAL DISPLAYS
use standard words and symbols whenever they exist
Standadization
PRINCIPLES THAT ENHANCE EFFECTIVENESS OF VISUAL DISPLAYS
made of materials that resist aging and wear and tear
Maintainability
LIGHT OR COLOR SIGNALS
Indicate that certain functions are on
White
LIGHT OR COLOR SIGNALS
Indicate satisfactory conditions (GO, READY, POWER ON)
green
LIGHT OR COLOR SIGNALS
Marginal condition exists, ALERTNESS is needed, CAUTION be exercised, CHECKING is necessary, UNEXPECTED delays exists
Yellow.
More on caution rather than risk
LIGHT OR COLOR SIGNALS
Stop, system is inoperative, corrective or overriding action need
Red
LIGHT OR COLOR SIGNALS
Emergency requiring IMMEDIATE action
Flashing Red
LIGHT OR COLOR SIGNALS
No special meaning but is used in combi with flashing red light
Blue
wang wang wang
Limit the number of colors in a display to _______ if users are inexperienced.
In general, No more than ___ colors should be used
– four
– seven
Avoid:
▪ Reds with blues
▪ Reds with cyans
▪ Magentas with blues
Color.
_____ is good for backgrounds and large shapes
Blue
Color
____ and _____ should not be used for small symbols and small shapes in peripheral areas of large
displays
red and green
Sound is created by ________ from some source
vibrations
The _______ of a physical sound is associated with the human sensation of pitch
frequency
Sound ______ is associated with the human sensation of loudness
intensity
Frequency is expressed in _______, which is equivalent to ________
– hertz (Hz)
– cycles per second
On the musical scale, middle C (piano keyboard) has a frequency of ________
256 Hz
The human ear is sensitive to frequencies between _____ to ______ Hz.
20 to 20,000 Hz
Infants can hear tones of about _______ to ______
16 Hz to 20 KHz
note: KILOHERTZ
Older people can rarely hear above _______
12 KHZ
NOTE: KILOHERTZ
Sound intensity is commonly expressed in terms of ________, based on the ratio between ________, and the ________
– decibels (dB)
– reference pressure level (Pr)
– pressure of interest (P)