personality development
Continuities, consistencies, and stabilities in people over time, and the way in which people change over time
Even though people change and develop as they age, each person still has a sense of self as the same person from year to year.
three key forms of stability
Rank order stability
Mean level stability
Personality coherence
three key forms of stability: Rank order stability
Maintenance of individual position within a group
Think test-retest reliability
three key forms of stability: Mean level stability
Constancy of level
Average of a group over time
Personality Change: Two Defining Qualities
internal
enduring
three key forms of stability: Personality coherence
Maintaining rank order relative to others, but changing in the manifestations of the trait
Can go from overt to covert
Personality Change: Two Defining Qualities
Internal
Changes are internal to a person, not changes in the external surroundings
Personality Change: Two Defining Qualities
Enduring
Changes are enduring over time, not temporary
3 levels of analysis
population level
group differences level
individual difference level
3 levels of analysis: population level
Changes or constancies that apply more or less to everyone
3 levels of analysis: group differences level
Changes or constancies that affect different groups differently
3 levels of analysis: individual difference level
Changes or constancies that affect individual people differently
E.g., Can we predict who is at risk for psychological disturbance later in life based on earlier measures of personality?
Personality stability over time: infancy
temperament
Personality stability over time: infancy– temperament
Individual differences that emerge very early in life, are heritable, and involved behaviours are linked with emotionality
As assessed by caregivers, temperament factors include activity level, smiling and laughter, fear, distress to limitations, soothability, and the duration of orienting
Research points to the following conclusions
—Stability of temperament is higher over short intervals of time than over long intervals of time
—Level of stability of temperament increases as infants mature
—Stable individual differences emerge early in life, where they can be assessed by observers
—For most temperament variables, there are moderate levels of stability over time during the first year of life
Personality Stability over time: Childhood
Measures taken early in life can predict personality later in life, but the predictability decreases over time
Stability of childhood aggression
Personlality stability over time: childhood– stabiltiy of childhood aggression
Individual differences in aggression emerge early in life, by three years of age
Individuals retain rank order stability on aggression over many years
Stability coefficients decline as interval between two times of measurement increases
Personality Stability Over Time: Adulthood
rank order stability in adulthood
mean level stability in adulthood
Personality Stability Over Time: Adulthood
Rank Order Stability in Adulthood
broad personality traits show moderate to high levels of stability
Stability also found using spouse-report and peer-report
Personality consistency tends to increase in stepwise fashion with increasing age—personality appears to become more and more “set in plaster” with age
Personality Stability Over Time: Adulthood–
Mean level stability in Adulthood
“Big five” personality factors show a consistent mean level stability over time
Especially after 50, very little change in the average level
Small but consistent changes, especially the during 20s
Openness, extraversion, neuroticism decline with age until 50
Conscientiousness and agreeableness show gradual increase with time
Changes in Self-Esteem from Adolescence to Adulthood
Transition from early adolescence to early adulthood appears to be harder on women than on men, in terms of the criterion of self-esteem
Females tend to decrease in self-esteem, males tend to increase in self-esteem
Appears to be a coherent set of personality variables linked with changes in self-esteem over time for females and males
Self-esteem variability:
Magnitude of short-term changes in ongoing self-esteem
Self-esteem variability is an indicator of vulnerability to stressful life events
Self-esteem variability is related to the extent to which one’s self-view can be influenced by events, particularly social events
Both participants with and without post- secondary education tend to become ___________ autonomous or independent as they grow older
more
sensation seeking
Increases with age from childhood to adolescence
Peaks in late adolescence, around ages 18–20
Falls more or less continuously with age after the 20s
impulsivity
Is distinct traits with divergent patterns of age-related change compared to sensation seeking
Impulsivity as the tendency to act on behavioural impulses without planning or consideration of consequences
Declined from late adolescence to early adulthood
The decline in impulsivity was much steeper and began earlier than the decline in sensation seeking