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General cognitive slowing in the nonlexical domain: An experimental validation.
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Abstract
Older and younger adults were tested on 4 nonlexical tasks: choice reaction time,
letter classification, mental rotation, and abstract matching. A positively accelerated
relation was observed between older and younger adults' latencies. Consistent with
general slowing, the relation observed with the same subjects in each condition was
more than 3 times as precise as in a comparable meta-analysis. Further analyses compared
the ability of various models to describe the present data and also to predict the
data on the basis of parameters estimated from a previous meta-analysis. Compared
with linear models, the information-loss and overhead models provided more accurate
accounts of general cognitive slowing in the nonlexical domain.