ERIC Number: EJ1067948
Record Type: Journal
Publication Date: 2015-Jun
Abstractor: As Provided
Impaired Statistical Learning in Developmental Dyslexia
Gabay, Yafit; Thiessen, Erik D.; Holt, Lori L.
Journal of Speech, Language, and Hearing Research, v58 n3 p934-945 Jun 2015
Purpose: Developmental dyslexia (DD) is commonly thought to arise from phonological impairments. However, an emerging perspective is that a more general procedural learning deficit, not specific to phonological processing, may underlie DD. The current study examined if individuals with DD are capable of extracting statistical regularities across sequences of passively experienced speech and nonspeech sounds. Such statistical learning is believed to be domain-general, to draw upon procedural learning systems, and to relate to language outcomes. Method: DD and control groups were familiarized with a continuous stream of syllables or sine-wave tones, the ordering of which was defined by high or low transitional probabilities across adjacent stimulus pairs. Participants subsequently judged two 3-stimulus test items with either high or low statistical coherence as being the most similar to the sounds heard during familiarization. Results: As with control participants, the DD group was sensitive to the transitional probability structure of the familiarization materials as evidenced by above-chance performance. However, the performance of participants with DD was significantly poorer than controls across linguistic and nonlinguistic stimuli. In addition, reading-related measures were significantly correlated with statistical learning performance of both speech and nonspeech material. Conclusion: Results are discussed in light of procedural learning impairments among participants with DD.
Descriptors: Dyslexia, Developmental Disabilities, Speech, Acoustics, Statistics, Learning, Syllables, Probability, Auditory Stimuli, Correlation, Reading
American Speech-Language-Hearing Association (ASHA). 10801 Rockville Pike, Rockville, MD 20852. Tel: 800-638-8255; Fax: 301-571-0457; e-mail: firstname.lastname@example.org; Web site: http://jslhr.asha.org
Publication Type: Journal Articles; Reports - Research
Education Level: N/A
Sponsor: National Institutes of Health (DHHS)
Authoring Institution: N/A
Grant or Contract Numbers: R01DC004674