Abstract
Many measures presumed to reflect the duration of specific information processes are currently being used by researchers examining aging and cognition. In this chapter we examine empirical relationships between these measures of specific information processing speed and measures of nonspecific processing efficiency, as well as the influence of adult age and health status on both types of speed measures. The influences of health on both specific and non-specific speed measures were small in the data sets examined, and health status had little or no moderating effects on the relations between age and measures of processing speed. The age-related influences on speed were substantial, but the effects on the specific speed measures were not independent of those on the nonspecific speed measures. Recommendations concerning analyses of measures hypothesized to reflect specific information processes are discussed.
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