Assumes certain biological factors and processes serve to influence the underlying operation and expression of personality
Biological Perspectives
Examines the degree to which contributions from certain inherited biological factors interact with environmental factors to determine the expression of certain personality characteristics in different groups
Behavioural Genetics Perspective
Most common methods used to estimate genetic contribution
Twin Studies (Monozygotic versus Dyzygotic)
Examines the extent to which various physiological factors and brain activity determine the expression of certain personality characteristics.
Physiological Perspective
Have the exact same genetic makeup (100%); one egg (ovum) is released and fertilized by one sperm, which subsequently divides into two separate cells, and two zygotes develop into…
Monozygotic / Identical
Develop from two separate fertilized eggs and are no more alike in their genetic structure than any other pair of siblings (50% shared genetic data)
Dizygotic / Fraternal
The degree to which a characteristic, trait, or disease that occurs in one twin similarly occurs in the second twin and use of the correlation coefficient
Concordance Rate
The amount of variability in personality measures that can be accounted for by a genetic contribution
Heredity
Examines the extent to which various physiological factors (e.g., hormones and neurotransmitters) and brain activity (e.g., arousal and inhibition) determine the expression of certain personality characteristics
Neurological Perspective
A male sex hormone associated with dominance, aggression, and persistence
Testosterone
A neurotransmitter associated with mood, anxiety, appetite and digestion, sleeping, and other functions. Levels have also been linked to a willingness to engage in thrill-seeking behaviors, which is considered a personality trait
Seratonin
Tend to exhibit a larger pattern of arousal in the brain in response to a new stimulus but a much faster reduction in arousal to that same stimulus when experiencing it again and again over time
High-Sensation Seekers
Network of structures in the midbrain that acts as a filter, is responsible for regulating arousal in the brain, and is linked with the personality dimension of introversion and extraversion
Ascending Reticular Activating System (ARAS)
What type of person tends to have a level of cortical activity that is higher than average (socially withdrawn)?
Introverts
Uses evolutionary theory to account for differences in personality arguing that these differences are adaptive responses to the two fundamental challenges of evolution: survival and reproductive success
Evolutionary Perspective
Individuals demonstrating the ___________ pattern of hostility tend to suppress their feelings of emotional distress, frustration, and anger, thereby increasing the effects of these emotions on their overall health, which can often lead to abuse of tobacco, alcohol, and drugs to seek comfort
Type A
Individuals exhibiting ________ tend to be overly moody, unstable, and anxious, which contribute to a general state of hyperarousal and tension.
Neurotism
Those for whom reproduction is possible but rates of reproductive success are low
Functionally Infertile Individuals (FII)
Subfield of psychology that attempts to account for individual differences in thinking, feeling, and behaving at various levels of analysis that range from the biological level to the group level
Personality Psychology
An enduring set of internally based characteristics that create uniqueness and consistency in a person’s thoughts and behaviors
Personality
The three distinct elements of personality are…
1) Uniqueness
2) Consistency
3) Explanation
Personality explains how the expression of each individual’s thoughts and behaviour are different
Uniqueness
Personality describes how the behaviour of the individual is consistent over time and across situations
Consistency
Personality accounts for the internal operations producing the unique and consistent expression of an individuals thoughts or behaviours
Processes