6533b81ffe1ef96bd12785e3
RESEARCH PRODUCT
Detection of sound rise time by adults with dyslexia
K. MüllerMinna TorppaJarmo A. HämäläinenHeikki LyytinenPaavo H.t. Leppänensubject
AdultHandwritingLinguistics and Languagemedicine.medical_specialtyLoudness PerceptionCognitive Neurosciencemedia_common.quotation_subjectExperimental and Cognitive PsychologyAudiologybehavioral disciplines and activitiesLanguage and LinguisticsDevelopmental psychologyPhonemic contrastDyslexiaSpeech and HearingPhoneticsCommunication disorderReading (process)PerceptionReaction TimemedicineHumansLanguage disordermedia_commonDyslexiaCognitionmedicine.diseaseAcoustic StimulationPattern Recognition VisualReadingRise timePsychologydescription
Low sensitivity to amplitude modulated (AM) sounds is reported to be associated with dyslexia. An important aspect of amplitude modulation cycles are the rise and fall times within the sound. In this study, simplified stimuli equivalent to just one cycle were used and sensitivity to varying rise times was explored. Adult participants with dyslexia or compensated dyslexia and a control group performed a detection task with sound pairs of different rise times. Results showed that the participants with dyslexia differed from the control group in rise time detection and a correlation was found between rise time detection and reading and phonological skills. A subgroup of participants with lower sensitivity to rise time detection characterized by low accuracy in syllable-level phonological skills was found within the dyslexic group. Short stimuli containing only one rise time produced associations with phonological skills and reading, even in a language where the perception of rise time contrasts are not crucial for the signaling of phonemic contrast.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2005-07-01 | Brain and Language |