The conditioned head turn procedure as a method for testing infant speech perception

Werker, Janet F.; Polka, Linda; Pegg, Judith E.

doi:10.1002/(sici)1099-0917(199709/12)6:3/4<171::aid-edp156>3.3.co;2-8

Cited by 30 publications

(49 citation statements)

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“…The studies used different methodologies to test infant discrimination: Visual habituation (this study) and a head-turn procedure (Bertoncini et al, 2011). Both methods rely on an infant's intrinsic interest in novel stimuli and are appropriate to assess speech discrimination in 6-month-old infants (Houston-Price and Nakai, 2004;Polka and Werker, 1994;Werker et al, 1998). Therefore differences likely reflect true differences based on factors other than methodology.…”

Section: Discussionmentioning

confidence: 99%

Vowel discrimination by hearing infants as a function of number of spectral channels

Warner-Czyz

Houston

Hynan

2014

The Journal of the Acoustical Society of America

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Reduced spectral resolution negatively impacts speech perception, particularly perception of vowels and consonant place. This study assessed impact of number of spectral channels on vowel discrimination by 6-month-old infants with normal hearing by comparing three listening conditions: Unprocessed speech, 32 channels, and 16 channels. Auditory stimuli (/ti/ and /ta/) were spectrally reduced using a noiseband vocoder and presented to infants with normal hearing via visual habituation. Results supported a significant effect of number of channels on vowel discrimination by 6-month-old infants. No differences emerged between unprocessed and 32-channel conditions in which infants looked longer during novel stimulus trials (i.e., discrimination). The 16-channel condition yielded a significantly different pattern: Infants demonstrated no significant difference in looking time to familiar vs novel stimulus trials, suggesting infants cannot discriminate /ti/ and /ta/ with only 16 channels. Results support effects of spectral resolution on vowel discrimination. Relative to published reports, young infants need more spectral detail than older children and adults to perceive spectrally degraded speech. Results have implications for development of perception by infants with hearing loss who receive auditory prostheses.

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Section: Discussionmentioning

confidence: 99%

Vowel discrimination by hearing infants as a function of number of spectral channels

Warner-Czyz

Houston

Hynan

2014

The Journal of the Acoustical Society of America

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“…Infants are not able to follow verbal instructions, which precludes the use of many of the standard assessment tools commonly available. We addressed this challenge by borrowing and adapting methodologies used by developmental scientists to study speech perception and language development in typically developing infants with normal hearing (Golinkoff et al, 1987; Werker et al, 1998). In February 2001, we established the first infant speech perception and language laboratory for infants with cochlear implants.…”

Section: Speech and Language Developmentmentioning

confidence: 99%

The Ear Is Connected to the Brain: Some New Directions in the Study of Children with Cochlear Implants at Indiana University

Houston¹,

Beer²,

Bergeson³

et al. 2012

J Am Acad Audiol

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Since the early 1980s, the DeVault Otologic Research Laboratory at the Indiana University School of Medicine has been on the forefront of research on speech and language outcomes in children with cochlear implants. This paper highlights work over the last decade that has moved beyond collecting speech and language outcome measures to focus more on investigating the underlying cognitive, social, and linguistic skills that predict speech and language outcomes. This recent work reflects our growing appreciation that early auditory deprivation can affect more than hearing and speech perception. The new directions include research on attention to speech, word learning, phonological development, social development, and neurocognitive processes. We have also expanded our subject populations to include infants and children with additional disabilities

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“…Werker,et al, 1998). These behavioral methods have not been widely adopted in speech, language, and hearing clinics, which typically report speech detection thresholds without any measure of discrimination between speech sounds.…”

Section: Introductionmentioning

confidence: 99%

Infant cortical electrophysiology and perception of vowel contrasts

Cone¹

2015

International Journal of Psychophysiology

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Cortical auditory evoked potentials (CAEPs) were obtained for vowel tokens presented in an oddball stimulus paradigm. Perceptual measures of vowel discrimination were obtained using a visually-reinforced head-turn paradigm. The hypothesis was that CAEP latencies and amplitudes would differ as a function of vowel type and be correlated with perceptual performance. Twenty normally hearing infants aged 4–12 months were evaluated. CAEP component amplitudes and latencies were measured in response to the standard, frequent token /a/ and for infrequent, deviant tokens /i/, /o/ and /u/, presented at rates of 1 and 2 tokens/second. The perceptual task required infants to make a behavioral response for trials that contained two different vowel tokens, and ignore those in which the tokens were the same. CAEP amplitudes were larger in response to the deviant tokens, when compared to the control condition in which /a/ served as both standard and deviant. This was also seen in waveforms derived by subtracting the response to standard /a/ from the responses to deviant tokens. CAEP component latencies in derived responses at 2/sec also demonstrated some sensitivity to vowel contrast type. The average hit rate for the perceptual task was 68.5%, with a 25.7% false alarm rate. There were modest correlations of CAEP amplitudes and latencies with perceptual performance. The CAEP amplitude differences for vowel contrasts could be used as an indicator of the underlying neural capacity to encode spectro-temporal differences in vowel sounds. This technique holds promise for translation to clinical methods for evaluating speech perception.

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The conditioned head turn procedure as a method for testing infant speech perception

Cited by 30 publications

References 0 publications

Vowel discrimination by hearing infants as a function of number of spectral channels

Vowel discrimination by hearing infants as a function of number of spectral channels

The Ear Is Connected to the Brain: Some New Directions in the Study of Children with Cochlear Implants at Indiana University

Infant cortical electrophysiology and perception of vowel contrasts

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