Psychology 2820E Lecture Notes - Lecture 9: Extraversion And Introversion, Developmental Psychology, Internal Validity

• School: Western University
• Department: Psychology
• Course: Psychology 2820E
• Professor: Riley Hinson

Document Summary

Another type of two group study where the researcher is interested in the difference between groups: using a quasi-independent variable to form groups but no treatment is given. Cross sectional designs: may be applied to any study that examines differences in a measured behaviour at one point in time in individuals differing on the basis of some quasi-independent variable (no treatment, just quasi-independent variables) For this reason, groups may be formed by using more extreme separations while leaving out the middle section. Developmental psychology most often examines changes in behaviour that occur as people age. Aging may be views as a quasi-i(cid:374)depe(cid:374)de(cid:374)t varia(cid:271)le si(cid:374)(cid:272)e a perso(cid:374)"s age is a characteristic that cannot be manipulated. Cross-lagged panel design: two variables are measured each at two time periods. The two variables are typically a behaviour of interest and some variable which is suspected of being causally related to the behaviour.