This study examined whether a secondary verbal shadowing task
influences recall for hand movements. Descriptive verbal labels
associated with hand postures (e.g., “fist”,
“palm”) were presented auditorily, concurrent with video
presentation of hand postures, and the participant was instructed to
shadow the words aloud. In the congruent verbal labels condition, the
words were matched with the hand postures shown, and in the incongruent
condition, the labels and hand postures were unmatched. In Experiment 1
(N = 18), a computerized version of the Kaufman Hand Movements
Test (KHMT), which involves three distinct hand postures, was performed
under congruent and incongruent labels conditions, and baseline. For
Experiment 2 (N = 18), the same format was applied to a hand
movement span task, similar to the KHMT, but based on seven distinct
hand postures. For both experiments, shadowing congruent labels
enhanced serial recall, whereas shadowing incongruent labels reduced
recall when compared to baseline. Thus memory for hand movements was
affected by the content of the secondary verbal task, consistent with
participants spontaneously using a verbal recoding and rehearsal
strategy to support this form of memory, a strategy enhanced through
the provision of appropriate labels. (JINS, 2004, 10,
355–361.)