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Prediction of PICA overall score by short versions of the test.

Two short versions (SPICAs) of the Porch Index of Communicative Ability (PICA) were developed and investigated, with specific attention to their ability to predict standard PICA overall scores of patients with aphasia. Ninety-three patients were administered three versions of the test in randomized order. Results indicate that SPICAs predict overall scores by standard administration at acceptable confidence levels in approximately one-third of the time required for the administration of the standard PICA.