PSYB30H3 Lecture Notes - Lecture 6: Twin, Extraversion And Introversion, Heredity
Document Summary
And when (if ever) does personality becomes set in stone: freud age 5 or 6 children resolving critical developmental conflicts. 5 or 6 will be stable into their adulthood. Personality would be stable: james age 30 personality is most stable and consistent after 30. Roberts & delvecchio: meta-analyzed findings from 152 longitudinal studies involving a total of 3,217 consistency coefficients and 50,207 participants, consistency increased as a function of age. Holding time interval constant at 6. 7 years, consistency coefficients equaled: 0. 31 infancy, 0. 43 in middle school, 0. 54 college years, 0. 64 in 30"s, 0. 74 in 50"s, consistency decreased as a function of time interval. The same trait may appear as y in one time, and appear as z in another situation. Researcher must have theory that underlying disposition remains the same, even if surface manifestation is different: the inferred consistency of some underlying attribute despite observed change in its behavioural expression.
