1. A source of bias in longitudinal investigations of change;Cohen,1991
2. Measurement of change in research on aging: old and new issues from an individual growth perspective;Collins,1996
3. Is reliability obsolete? A commentary on ‘Are simple gain scores obsolete?’;Collins;Appl. Psychol. Measurement,1996
4. Comment on ‘A source of bias in longitudinal investigations of change’;Collins,1991
5. An alternative framework for defining mediation;Collins;Multivariate Behav. Res.,1998