Timothy A. Salthouse

TL;DR: In this article, three hypotheses were proposed to account for individual differences in spatial visualization ability were investigated and the evidence was somewhat mixed with respect to the preservation-under-transformation hypothesis but it does appear that spatial visualization differences are most pronounced when some information must be preserved while the same or other information is being processed.

TL;DR: This article found that age-related differences in basic processing efficiency may be responsible for a large proportion of the agerelated influences on the performance of moderately complex activities presumed to be similar to those likely to be encountered in a variety of work situations.

TL;DR: The results were consistent with the existence of a distinct timesharing ability because the time-sharing costs in the three dual-task combinations were significantly correlated with one another but only weakly correlated with other cognitive variables.

TL;DR: In this paper, two analytical methods were proposed to evaluate the extent to which the age-related influences in a set of variables are independent of one another, and they showed that as few as one or two distinct factors may be sufficient to account for a large proportion of the agerelated variance in a variety of cognitive variables.