We illustrate the idiographic/nomothetic debate by comparing 3 approaches to using daily self-report data on affect for predicting relationship quality and breakup. The 3 approaches included (a) the first day in the series of daily data; (b) the mean and variability of the daily series; and (c) parameters from dynamic factor analysis, a…

Psychology texts, dating from 1940, are examined to assess the impact of Raymond B. Cattell's work on the fields of social psychology and group dynamics. Factors contributing to his surprising lack of influence, including difficulties with the complexity, terminology, and independent nature of his work and personality, are discussed. (BS)