Lervag and Hulme’s neuro-developmental theory and Wolf and Bowers’s double-deficit hypothesis were examined in this longitudinal study. A total of 130 children were tested in preschool and followed through fifth grade, when 84 remained in the study. During preschool and kindergarten the participants were given tests of end-sound discrimination…

The study examined the developmental lag hypothesis for learning disabilities by evaluating dichotic listening ability using both free recall and directed attention conditions in 24 learning disabled (LD) adults. Findings indicated LD adults showed similar deficits in lateralized selective auditory linguistic processing as children with LD. (DB)

Discussed is the spatial concept model of J. Piaget in terms of the child's development from topological spatial relationships to Euclidean and projective relationships with implications for assessment and remediation of perceptual dysfunction. (DB)