Timothy A. Salthouse

TL;DR: The role of processing resources in cognitive aging has been investigated in this paper, where it is shown that an age-related reduction in some type of general-purpose processing resources contributes to impaired cognitive performance.

TL;DR: The results indicated that for adults within this age range, 7 or more years were needed before positive retest effects were no longer detectable and age effects in longitudinal comparisons could be interpreted in terms of large positive effects associated with a prior assessment and negative effects related to age comparable in magnitude to those observed in cross-sectional comparisons.

TL;DR: This paper investigated the structural organization of cognitive variables, and used that structure to examine relations between cognitive abilities and neuropsychological variables, finding that the variables could be organized into the same cognitive ability factors in both children and adults, and that a large proportion of the age-related influences on measures of cognitive functioning was shared across different cognitive abilities.

TL;DR: Three issues that should be considered when designing and interpreting comparisons involving reaction time concern speed-accuracy tradeoffs, methods of analyzing measures postulated to reflect specific processes, and methods for distinguishing group-related influences that are shared with other variables from those that are unique to a single variable.