AbstractEighty practitioners with varying levels of experience in the administration of the Kaufman Assessment Battery for Children (K‐ABC) were asked to complete a K‐ABC Abilities Matrix to indicate their perceptions of the specific abilities assessed by each of the ten K‐ABC Mental Processing subtests. The practitioners' responses were compared to the perceptions of the K‐ABC authors, and, in roughly half of the judgements, a majority of the practitioners agreed with the test authors, while the remaining judgements constituted majority disagreements. The practitioners associated additional psychoeducational abilities or skills, that had not been identified previously by the K‐ABC authors, with several of the K‐A