Based on 92 logitudinal studies of personality

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based on 92 logitudinal studies of personality. consensus that from 20-40 there is a decrease in N, 2 kinds of E (social dominance increases), A and C increase. this is a pretty happy story. most of us will improve and increase in positive traits. (but our peers will be increasing too). We may feel more socially confident and less N and be able to perceive differences in our behavior, and better outcomes in social life and work life. but the rank order that you have is not very different. can people see this in their own lives? Roberts: the way he calculated his scores was standardized in terms of standard deviations. A (which changed) was the smallest one (1/2 a SD), social dominance (changed over 1 SD) - people changed a lot! He would suggest that these changes are moderately large to very large. if it is a large effect size it will be observable and you can tell that you are different. Thursday, April 7, 2011
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How much do people change? 7 Thursday, April 7, 2011
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Return to original examples Bruce 8 Koestner N E Major Limitation? those changes would be perfectly consistent with research literature (this is what most people change in); this is exactly how K felt he changed! limitation of this research area according to Roberts: all of it has only been done with American and European samples. Roberts suggests that for certain traits (like C), he expects that there would be a different pattern in Asian samples. For western, C continues to increase throughout lifespan. He expects that C would be much higher in young people in Asian countries (more emphasis on group and responsibility) Thursday, April 7, 2011
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Are certain people more likely to change? Costa & McCrea 1988 Majority change significantly on at least one of the big 5 traits. K always thought he was unique in becoming less N and more E (but really it is normative!). Some friends may change a lot while others may not change at all. even though the rank order stability is so high, Roberts looked at what percentage of people changed dramatically on at least 1 of the 5 traits; he found that almost half the people showed dramatic change on at least 1 trait dimension... that would suggest that it is possible for us to change drastically Test Moderator Hypothesis question: is there a moderator? Daryl Bem asked people for their most personally relevant important trait and those traits remained more consistent. Costa and McCrae asked everyone how much they think they have changed in their major personality traits over the last 6 years. 1/3 of people said they feel they changed a lot. 1/3 said they did not changed at all. he then compared the stability correlations for these 2 groups (from 6 years before and 6 years later). found a mean of .77 which is high stability!!! the group that said they did not change was .82 (there is no statically significant difference between these 2 group correlations) 9 Thursday, April 7, 2011
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10 Costa & McCrae 1989 Stability r's by self perceived change Self-Reports of "Lots of Change" "No Change" N .77 .86 E .66 .86 O .86 .82 A .70 .62 C .80 .81 ------------------------------------
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  • Winter '11
  • KOESTNER
  • Big Five personality traits, neuroticism, Thursday, rank order

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