Kail responds to Stigler and others' criticisms of Kail's 1986 article and maintains that their criticisms are incorrect or implausible. He agrees with their conclusion that theories of cognitive development must include both domain-specific and general processes. (RJC)

Tested adults and children (age 6 to 16 years) on 4 speeded tasks that included 19 experimental conditions. The 6- to 16-year olds' response times decreased with age as a function of adults' response times. (MM)

The memory, processing speed, and articulation rate of 24 9 year olds and 24 adults were measured. Results supported a model in which individuals execute cognitive processes more rapidly as they grow older. In addition, age contributes to more rapid rehearsal of words, which yields more accurate recall. (BG)

Measured cognitive processing time, imagery skill, and spatial memory span of 128 children and adults, ages 8 to 20 years. Found that performance on spatial memory span tasks was largely predicted by imagery skill, which in turn was strongly linked to processing time; age was much less of a predictor in both cases. (EAJ)

Tests two hypotheses concerning developmental change in the speed of cognitive processes: (1) age differences in processing time reflect changes that are specific to particular tasks, and (2) age differences in processing speed do not reflect task-specific change but are due instead to more general developmental change. (HOD)

Children and adults were tested on six speeded perceptual-motor and cognitive tasks, including a (1) response time task; (2) button tapping task; (3) pegboard task; (4) coding task; (5) picture matching task; and (6) mental addition task. Age-related change in processing time on most of these tasks was described by a single exponential function.…