Teachers and parents completed the Adaptive Behavior Scale-School Edition (ABS-SE) and the Adaptive Behavior Inventory for Children (ABIC) while 57 educable mentally retarded (EMR) (N=36) and slow learners (N=21) completed the Children's Adaptive Behavior Scale (CABS). Analysis of variance and T-test comparisons indicated higher ratings for SL group than for the EMR group. Also, parents tended to rate their child higher than the child's teacher would rate them. Correlational analyses indicated that the concurrent validity of the ABIC when compared to the ABS-SE appears low but the relationship between the CABS and the ABS-SE is fairly high. Inconsistent correlations were found between adaptive behavior and IQ. Results further indicated inconsistent correlations between various areas measured by the different adaptive behavior scales such as self-help skills, functioning within the community, social/peer relationships and economic/vocational skills. (Author)