Timothy A. Salthouse

TL;DR: Salthouse and Collins as discussed by the authors argued that both levels of analysis are useful and necessary in developmental research and argued that the differences between their two positions are more apparent than real. But they also argued that Salthouse was emphasizing a proximal level of analysis, whereas Collins (1994) emphasized a distal level.

TL;DR: It remains to be seen whether constraints and tools will be effectively employed in the field of memory research, but the fact that they exist and are starting to be recognized suggests that Watkins' (1990) prognosis may be too pessimistic.

TL;DR: Results were consistent with the hypothesis that within-person variability in self-reported personality is a meaningful individual difference characteristic, and some people exhibited greater across-time variability than others after removing measurement error.