The study of Down Syndrome (N=16), other mentally retarded, and non retarded subjects (all matched for mental age) found that Down Syndrome subjects showed significantly poorer recall of auditorially presented stimuli than the other two groups (which did not differ). (Author/DB)

This study examined the matching and sequencing of quantities, numerals, and arbitrary forms by two individuals with mental retardation. Results showed that sequence training did not readily lead to new matching performances, unlike prior research with college students. Instead, training in matching to sample yielded emergent sequence production…