MT2 Flashcards
Direct measurement of SNS activity
Electrodermal Activity (skin conductance)
SNS activation => sweat production
higher sweat production = higher electrical activity
Chronic activation of SNS as a result of
high anxiety and neuroticism
How does stress affect cardiovascular activity?
Stress => SNS activation => inc BP and HR
Linked to Type A personality
Measurements of brain activity
PET and (f)MRI
Noninvasive techniques for mapping
Biochemical analyses of blood to look for:
Monoamine Oxidase - removes neurotransmitters (norepinephrine, serotonin and dopamine) from the brain
Biochemical analysis of saliva for:
Immune system fxn
Hormone levels
Physiological theories of extraversion-introversion
Eysenck + Hebb
Difference in AROUSABILITY
Introverts show larger/faster NS response to moderate stimulation
Ascending Reticular Activating System (ARAS)
- Structure in brainstem controls cortical arousal
- Introverts have higher baseline cortical arousal and .t. are more sensitive to stimulus
- Eysenck’s Theory
Optimal Level of Arousal
- Ind differences in optimal level for any given task
- Introverts attempt to regulate arousal downward
- Extraverts attempt to regulate arousal upward
- Arousal curve: Rainbow shape; work best at peak
- Hebb
Reinforcement Sensitivity Theory
Physiological theory of sensitivity to reward + punishment
Ppl differ in sensitivity of BIS/BAS
BIS: responsive to punishment, frustration, uncertainty; vulnerable to negative affect, high anxiety, and neuroticism
BAS: vulnerable to positive affect, high impulsivity, and extraversion
Gray
Physiological theories of sensation seeking
Hebb, Zuckerman, MAO
Sensory deprivation => motivation to acquire any sensory input
Optimal Level of Arousal Theory (Hebb):
- ppl are motivated to reach their optimal level of arousal through tension reduction or tension seeking
- sensation seekers look to inc arousal
Sensation-Seeking Scale (Zuckerman):
- measure need for novel/exciting experiences + thrill enjoyment
- predicts sensory deprivation tolerance (high sensation seeking = lower tolerance)
- moderate positive correlation between extraversion and sensation seeking
Monoamine oxidase
- MAO fxn: decomposes NTs ∴ inhibits neurotransmission to control muscles, thots, emotions
- high sensation seeking = low MAO = high neurotransmission = low inhibition
Tridimensional Personality Theory for Neurotransmission
Cloninger
Dopamine: ↓ dopamine = ↑ novelty seeking (seeking pleasure/reward)
Serotonin: Abnormalities in uptake/metabolism = harm avoidance
Norepinephrine: ↓ NE = reward dependence
Which hemisphere is most activated during negative affect
right frontal
Which hemisphere is most activated during positive affect
Left frontal
Right hemisphere dominance correlated with
Lower optimal level of arousal: ↑ cortisol response ∴ ↓ threshold for negative emotional response (↑ irritability)
Meditation can train a shift toward left-sided assymmetry
Dimensions of Zuckerman’s Sensation-Seeking Scale
Thrill + adventure seeking
Experience seeking
Disinhibition
Boredom susceptibility/Impulsivity
Trends of Zuckerman’s Sensation-Seeking Scale
Men > Women (stable across time but gap narrows)
Inc age = dec scores
Peak in late adolescence
Habituation: repetitiveness decreases arousal ∴ have to find new, more exciting activity
Novelty seeking linked to creativity
Fear/anxiety not correlated, BUT high sensation seekers will enjoy the thrill of fear
Adaptations
Darwin
Inherited solutions to survival/reproduction problems caused by events that impede survival
Sexual Selection
Define and 2 forms
Evolution of characteristics because of mating benefits (vs survival)
2 forms:
- Intrasexual competition: members of same sex compete for greater access to members of opposite sex (victory = inc mating opportunites)
- Intersexual Selection: choose mate based on preferences of characteristics (inc prefered characteristics = inc offspring)
Inclusive Fitness Theory
“Inclusive” fitness = personal reproductive success PLUS ind effect on the reproductive success of genetic relatives
- weighted by degree of genetic relatedness
- cost of helping relative must be less that benefit of reproduction of common genes
Differential gene reproduction
Reproductive success relative to others
Result of survival and/or successful mate competition
3 products of the evolutionary process
1) Adaptations: primary product
- reliably developing structure in the organism
- affected by environment
- meshes with recurrent structures of the world (selective envmt)
- must facilitate the solution to an adaptive problem (“special design”)
2) Byproducts of adaptations
- incidental effects of evolution
- e.g. nose for smelling (adaptation) and for holding up glasses (byproduct)
3) Noise
- random variants
- neutral with respect to selection (no hinderance to adaptation fxn)
Evolutionary Psychology (3 premises and limitations)
Evolutionary processes create many specialized mechanisms to solve particular adaptive problems. These adaptive mechanisms are:
1) Domain Specific
2) Numerous
3) Functional
Limitations:
- archival
- conditions change
- mult theories for phenomena (not all falsifiable)
Evolutionary Analysis Hierarchy
1) Evolution by selection (survival + reproduction)
2) Middle-level evolutionary theories (e.g. parental investment)
3) Hypotheses
4) Specific predictions (if true, then what?)
Value and tenability of a theory
determined by specific predictions in an if… then format
Empirical research of the evolution hypothesis
Evolutionary psychology proceeds through deductive (top-down, theory-driven) and inductive (bottom-up, data-driven) research
Human Nature - Need to Belong
Hogan: most basic human motivators are status and acceptance (increases resources such as protection, food, mates)
Establish cooperative relations with group and negotiate hierarchies in order to survive and reproduce
Evidence for need to belong as survival mech
inc threat to survival = inc group cohesion
resources linked with group membership = inc bonding
inc time with others = inc self-esteem
Social anxiety adaptation
Social anxiety is a species-typical adaptation to prevent exclusion
Exclusion activates physical pain system (ACC)
Self-esteem monitors social inclusion
Key adaptive functions of group (Baumeister & Leary)
Sharing: food, info, resources
Protecting: against external threats
Access: inc concentration of mates for reproduction
Kin: opportunity for altruism + inclusive fitness
Evolutionary Altruism (Burnstein)
Helping others is a direct function of recipient’s ability to enhance the inclusive fitness of the helper
⬆︎ helping by:
↑ genetic relatedness
↓ age
↑ reproductive value
3 perspectives on universal emotion
1) Interpretation across cultures
- if all humans share an emotional expression, then likely to be a core part of human nature
2) Emotions are adaptive psych mechs that signal various “fitness accordances” in the social envmt
- emotions guide toward goals that would have conferred fitness in ancestral envmt
3) Manipulation hypothesis: emotion designed to exploit psych mechs of other people
- e.g. express rage to back-up threat
Ekman: emotions are an evolved part of human nature bc universally expressed/recognized
Evolutionary-Predicted Sex Differences
Sexes will differ in domains that have different adaptive problems
e.g. women need stable resources to support pregnancy + lactation ∴ find mate that can reliably support them
Evolutionary predictor of aggression
Patterns of aggression predicted by intrasexual competition (women are valuable, limited resource for reproduction)
Long history of effective polygyny in men ∴ more often perpetrators/victims of violence
Effective polygyny
Some males gain many offspring, meanwhile other men are shut out from contributing to the ancestry of future gens
↑ effective polygyny = ↑ intrasexual competition = ↑ sexual dimorphism in size and form = ↑ variance in offspring
2 main theories of evolutionary jealousy
1) Infidelity risks
- Men more sensitive to sexual infidelity bc of risk of investing in children who are not their own
- Women more sensitive to emotional infidelity bc of need for stable resources
- Low empirical support
2) Attachment-fertility (Miller + Fishkin)
- ↑ offspring survival with parental investment from both ∴ selective pressure favouring men who could develop bond with kids and mother
- jealousy evolved to preserve bonds
4 main evolutionary mechs to explain ind differences in adaptive traits
1) Envmtl triggers
- degree of exposure to evoking conditions
2) Contingency on other traits
- use adaptive self-assessments to determine social strategies (personal strengths + weaknesses)
3) Frequency-dependent strategies
- heritable variation decreases as successful variants replace the less successful
- frequency-dependent selection: 2 or more heritable variants maintained
- success of variant depends on commonality
- life history strategy (differences in effort allocated to reproductively relevant problems)
4) Optimum value of trait changes with time and place
- value of trait = forces of selection
- ind diffs due to dif evolutionary selection processes in local ecologies
- i.e. risk taking: selection for cautious vs risk-taking traits depend on food security vs scarcity
Reactively heritable
Secondary consequence of heritable trait
(e.g. body build –> aggression)
Adaptive Rumination Hypothesis
Depression is an adaptation that evolved as a response to social stress relating to survival/fitness
Function: sustain rumination/analysis of complex problems
K-strategy of life history
Survival + parenting > obtaining many mates
∴ ↑ attachment, ↓ risky bhvr
How are stable individual differences maintained
Motivational reactions (solutions) to particular classes of adaptive problems
Personality differences maintained by balancing selection => dif levels of trait adaptive in different environments
Correlations between Big 5 and adaptive solutions
Agreeableness: cooperation
Emotional stability: sensitivity to exclusion
High neuroticism: ↑ vigilance, ↑ stress + depression
Extraversion: risk-taking and short-term mating
Conscientiousness: goal pursuit + delayed gratification