The study contrasted the learning of the Rebus and Bliss symbol systems by language-delayed preschoolers. Subjects included 26 black preschool children, aged 4-6. Results showed that Rebus pre-test and post-test scores were significantly higher than Bliss pre-test and post-test scores. Results also showed a 35% improvement in identification of…

The study compared play among five groups of children (ages 3-7 years): normal children (N=41); those diagnosed with language delays (N=241), those with autism but normal intelligence (N=71), those with autism and mental retardation (N=97), and those with nonautistic mental deficiency (N=86). Each child was evaluated using a 25 minute structured…