“…This is true whether matched on receptive vocabulary, 147-149 nonverbal ability, 150 -153 general mental age, 77,90 or when compared with one's own general ability level. 154,155 In addition, youth with WS perform similarly to ID controls 91,113,147 except for those with DS, whom they outperform. 77,90,92,112,156 Furthermore, phonological similarity, word length, frequency, lexicality, concreteness, primacy, and recency have the same effects on immediate verbal memory in young people with WS as in typically developing peers or peers who have ID.…”