In this study, a group of 30 university students were administered the
Paced Auditory Serial Addition Task (PASAT) and their performance com
pared with that of an older group matched for ability on the National
Adult Reading Test (NART). They were also compared on measures of memo
ry (forwards and backwards digit span) and a timed visual search task.
The younger participants showed significantly inferior performance on
the PASAT. This is counter-intuitive considering that the test is vie
wed primarily as a measure of speed of processing. There were no diffe
rences on measures of short-term memory, but the older participants fo
und fewer targets on the visual search task. The implications of this
result for clinicians using the PASAT are discussed.