Recognition and recall for stimuli varying in colour and shape were investigated in normal and severely subnormal children of equivalent mental age levels in three experiments. In each experiment half the children in each group were made to verbalize about the stimuli while the other half was not. The normal subjects tended to remember both dimensions more equally than the subnormals who tended to remember one dimension in preference to another when there was no verbalization. However, since verbalization improved the memory of the second dimension in severely subnormal subjects it is concluded that severely subnormals are handicapped in paying attention to more than one dimension.
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