Williams syndrome (WS) is a neurodevelopmental genetic disorder often described as being characterized by a dissociative cognitive architecture, in which profound impairments of visuo-spatial cognition contrast with relative preservation of linguistic, face recognition and auditory short-memory abilities. This asymmetric and dissociative cognition…

Recent theories of verbal memory have hypothesized that memory for a stimulus is not represented by a unitary memory trace, but rather by a coding on several attributes of the event. The present experiment tested the differential forgetting hypothesis in a unique way. Words were presented either visually (V) or auditorally (A) in a continuous…

The short-term verbal memory performance of 19 children and young adults with Down syndrome (DS) was contrasted with that of two control groups. Results confirm the expected verbal short-term memory deficit in DS subjects and suggest that this deficit is specific to memory for verbal information and is not primarily caused by auditory or…

Two detection experiments were conducted with short lists of synthetic speech stimuli where phoneme targets were compared to syllable targets. Results suggest that phonemes and syllables are equally basic to speech perception. (Author/RM)

Forty-eight grade-three children and 48 grade-eight children were presented respectively with six- and eight-letter sequences for written free recall. The older children, as had adult subjects in previous studies, showed a greater tendency to recall serially with a four-letters-per-second presentation rate than with a half- or…

A study is reported in which pairs of synonyms, antonyms, coordinates, and super super-subordinates were presented dichotically to university students. After each pair the subject reported what he heard. In one condition the two members of a pair were presented simultaneously, and in another they were presented sequentially. (Author/RM)

This study investigated the premise that disordered temporal order perception in retarded readers can be seen in the serial processing of both nonverbal auditory and visual information, and examined whether such information processing deficits relate to level of reading ability. The adult subjects included 20 in the dyslexic group, 12 in the…

Three experiments tested whether qualitative differences in processing of verbal materials result from congenital hearing impairment. Subjects were children with reading levels equivalent to grades 4 to 6. Experiment 1 used repeated measurements with two modes of response and two kinds of cues; experiment 2 used acoustic similarity to produce…