Perceptual invariance has been studied and found in several domains of cognition, including those of speech, motor behavior, and object motion. It has also been the topic of several studies in music perception. However, the existing perceptual studies present rather inconclusive evidence with regard to the perceptual invariance of expressive…

To determine whether deficits warranting intervention are present in the later functioning of high-risk infants, 22 premature infants who experienced asphyxia or chronic lung disease (CLD) but who had no gross developmental abnormalities were evaluated. Assessments of auditory perception and receptive language ability were made during later…

The experiments reported here investigated a developmental change in frequency generalization in the hatchling chicken. (Author)

Acoustic properties of retroflex consonants were determined and interpreted in terms of acoustic theory. The results are considered in relation to a quantal theory, auditory property detectors, and theoretical notions of markedness. (Author/TL)

Two experiments were conducted to determine whether the auditory and visual systems process simultaneously presented pairs of alphanumeric information differently. (Editor)

Summarizing research activities from January 1977 to September 1978, this is the fourth annual report of research on speech processing conducted in the Department of Psychology at Indiana University. The report includes extended manuscripts, short reports, progress reports, and information on instrumentation developments and software support. The…

The results of three projects concerned with auditory word recognition and the structure of the lexicon are reported in this paper. The first project described was designed to test experimentally several specific predictions derived from MACS, a simulation model of the Cohort Theory of word recognition. The second project description provides the…

Patterns of auditory response among aphasics are described and hypothized and retraining methods are enumerated. (CH)

Fifteen normal-speaking kindergarteners, 15 kindergarteners with defective r's, and 15 preschoolers sound identification task which included sounds the speech-defective Ss misarticulated and sounds they articulated correctly. (GW)

Spanish speaking children who spell better than they read often have a visual perception problem. (DB)

The dichotic listening paradigm in relation to specific reading disability was investigated with 58 severely disabled readers and 58 above-average readers (all 9-year-old males). Comparison of scores from a Dichotic Digits Task and Dichotic Sides and Types Tasks indicated that disabled readers performed worse than controls in the overall right-ear…