Impaired tool related action in ideomotor apraxia is normally ascribed to loss of sensorimotor memories for habitual actions (engrams), but this account has not been tested against a hypothesis of a general deficit in representation of hand-object spatial relationships. Rapid reaching for familiar tools was compared with reaching for abstract…

After distinguishing between neocortical abilities for executive control and subcortical sensory motor skills for proprioceptive and vestibular integration, we compare a sample of 116 normal preschoolers with a sample of 31 preschoolers receiving occupational therapeutical treatment. This is done in an experimental design controlled for age (mean:…

Ten normally speaking children, 10 having mild misarticulations, and 10 having severe misarticulations, aged seven-eight, were administered unisensory and bisensory processing tasks. Results showed that misarticulating children obtained lower scores than normal children on all bisensory tasks and had larger decrements from unisensory to bisensory…

This study reexamines factor analyses from which A. J. Ayres claimed to have identified perceptual-motor factors found in the scores of children with learning disabilities but not normally learning children. The reappraisal finds no support for the claim, and as a result, no support for derived diagnostic procedures or remedial programs.…