In, "Idiographic Filters for Psychological Constructs," Nesselroade, Gerstorf, Hardy, and Ram study patterns of variation within individuals. In this context they make an important suggestion: to test for invariant relations among latent variables, but to allow the relations between these latent variables and their indicators to vary between…

The current stage in an on-going research program of student learning is summarized. With two more years to run, provisional research provides the beginnings of a model of student learning which is neither static nor mechanistic. Recent research has placed emphasis on describing how students learn and how learning is affected by the academic…