Abstract
The effect of a verbal distracting activity on memory performance of the left and right hemisphere was investigated in normal subjects by showing the time course of laterally presented consonant trigrams in the Brown-Peterson paradigm. Experiment 1 showed that delay alone, with no interpolated activity, did not produce significant hemispheric asymmetries. In Experiment 2 a verbal interfering task produced a significant greater memory impairment for LVF/RH inputs. In order to test some hypotheses fitting the data of these 2 experiments, 2 parameters were altered. Increasing the exposure time (Experiment 3) and reducing the amount of information to be recalled (Experiment 4) reduced the RVF/LH advantage. As in Experiments 3 and 4 the verbal features of both the laterality and the interpolated task were not modified, this result lends support to a dual code model rather than to a selective activation model.
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