Hearing & Speech Sciences Research Works

Permanent URI for this collectionhttp://hdl.handle.net/1903/1643

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End date: 2019

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Now showing 1 - 7 of 7
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    Age-Related Temporal Processing Deficits in Word Segments in Adult Cochlear-Implant Users
    (Sage, 2019-12-06) Xie, Zilong; Gaskins, Casey R.; Shader, Maureen J.; Gordon-Salant, Sandra; Anderson, Samira; Goupell, Matthew J.
    Aging may limit speech understanding outcomes in cochlear-implant (CI) users. Here, we examined age-related declines in auditory temporal processing as a potential mechanism that underlies speech understanding deficits associated with aging in CI users. Auditory temporal processing was assessed with a categorization task for the words dish and ditch (i.e., identify each token as the word dish or ditch) on a continuum of speech tokens with varying silence duration (0 to 60 ms) prior to the final fricative. In Experiments 1 and 2, younger CI (YCI), middle-aged CI (MCI), and older CI (OCI) users participated in the categorization task across a range of presentation levels (25 to 85 dB). Relative to YCI, OCI required longer silence durations to identify ditch and exhibited reduced ability to distinguish the words dish and ditch (shallower slopes in the categorization function). Critically, we observed age-related performance differences only at higher presentation levels. This contrasted with findings from normal-hearing listeners in Experiment 3 that demonstrated age-related performance differences independent of presentation level. In summary, aging in CI users appears to degrade the ability to utilize brief temporal cues in word identification, particularly at high levels. Age-specific CI programming may potentially improve clinical outcomes for speech understanding performance by older CI listeners.
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    Effects of Age, Cognition, and Neural Encoding on the Perception of Temporal Speech Cues
    (Frontiers Media, 2019-07-19) Roque, Lindsey; Karawani, Hanin; Sandra, Gordon-Salant; Anderson, Samira
    Older adults commonly report difficulty understanding speech, particularly in adverse listening environments. These communication difficulties may exist in the absence of peripheral hearing loss. Older adults, both with normal hearing and with hearing loss, demonstrate temporal processing deficits that affect speech perception. The purpose of the present study is to investigate aging, cognition, and neural processing factors that may lead to deficits on perceptual tasks that rely on phoneme identification based on a temporal cue – vowel duration. A better understanding of the neural and cognitive impairments underlying temporal processing deficits could lead to more focused aural rehabilitation for improved speech understanding for older adults. This investigation was conducted in younger (YNH) and older normal-hearing (ONH) participants who completed three measures of cognitive functioning known to decline with age: working memory, processing speed, and inhibitory control. To evaluate perceptual and neural processing of auditory temporal contrasts, identification functions for the contrasting word-pair WHEAT and WEED were obtained on a nine-step continuum of vowel duration, and frequency-following responses (FFRs) and cortical auditory-evoked potentials (CAEPs) were recorded to the two endpoints of the continuum. Multiple linear regression analyses were conducted to determine the cognitive, peripheral, and/or central mechanisms that may contribute to perceptual performance. YNH participants demonstrated higher cognitive functioning on all three measures compared to ONH participants. The slope of the identification function was steeper in YNH than in ONH participants, suggesting a clearer distinction between the contrasting words in the YNH participants. FFRs revealed better response waveform morphology and more robust phase-locking in YNH compared to ONH participants. ONH participants also exhibited earlier latencies for CAEP components compared to the YNH participants. Linear regression analyses revealed that cortical processing significantly contributed to the variance in perceptual performance in the WHEAT/WEED identification functions. These results suggest that reduced neural precision contributes to age-related speech perception difficulties that arise from temporal processing deficits.
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    Fluency of School-Aged Children With a History of Specific Expressive Language Impairment: An Exploratory Study
    (American Speech-Language-Hearing Association, 2002-02) Boscolo, Brian; Ratner, Nan Bernstein; Rescorla, Leslie
    A large volume of literature now links language demand and fluency behaviors in children. Although it might be reasonable to assume that children with relatively weak language skills might demonstrate higher levels of disfluency, the sparse literature on this topic is characterized by conflicting findings on the relationship between language impairment and disfluency. However, in studies finding elevated disfluency in children with specific language impairment, a higher frequency of disfluencies more characteristic of stuttering has been noted. This study asks whether children with long-standing histories of language delay and impairment are more disfluent, and display different types of disfluencies than their typically developing, age-matched peers. Elicited narratives from 22 pairs of 9-year-old children were analyzed for fluency characteristics. Half of the children had histories of specific expressive language impairment (HSLI-E), whereas the others had typical developmental histories. The children with HSLI-E were significantly more disfluent than their peers and produced more stutter-like disfluencies, although these behaviors were relatively infrequent in both groups. Implications for clinical intervention and future research are discussed.
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    Parental Perceptions of Children’s Communicative Development at Stuttering Onset
    (American Speech-Language-Hearing Association, 2000-10) Ratner, Nan Bernstein; Silverman, Stacy
    There has been clinical speculation that parents of young stuttering children have expectations of their children’s communication abilities that are not well-matched to the children’s actual skills. We appraised the language abilities of 15 children close to the onset of stuttering symptoms and 15 age-, sex-, and SES-matched fluent children using an array of standardized tests and spontaneous language sample measures. Parents concurrently completed two parent-report measures of the children’s communicative development. Results indicated generally depressed performance on all child speech and language measures by the children who stutter. Parent report was closely attuned to child performance for the stuttering children; parents of nonstuttering children were less accurate in their predictions of children’s communicative performance. Implications for clinical advisement to parents of stuttering children are discussed.
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    Parental Language Input to Children at Stuttering Onset
    (American Speech-Language-Hearing Association, 2001-10) Miles, Stephanie; Ratner, Nan Bernstein
    Many programs for the indirect management of stuttering in early childhood counsel adjustment of parental language models, which are presumed to play an exacerbating influence on vulnerable children’s fluency. We examined the relative levels of linguistic demand in maternal language to stuttering and nonstuttering children, adjusted for each child’s current level of linguistic development. No significant or observable differences were detected in the relative level of linguistic demand posed by parents of stuttering children very close to onset of symptoms. Empirical support for current advisement and potential ramifications are discussed.
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    Caregiver–Child Interactions and Their Impact on Children’s Fluency: Implications for Treatment
    (American Speech-Language-Hearing Association, 2004-01) Ratner, Nan Bernstein
    There is a relatively strong focus in the stuttering literature on the desirability of selected alterations in parental speech and language style in the management of early stuttering. In this article, the existing research support for such recommendations is evaluated, together with relevant research from the normal language acquisition literature that bears on the potential consequences of changing parental interaction style. Recommendations with relatively stronger and weaker support are discussed. Ways in which children’s communication styles and fluency may be altered through newer fluency treatment protocols are contrasted with older, more general parent advisements. Finally, directions for future research into the efficacy of recommendations made to the parents of children who stutter (CWS) are offered.
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    Syllable structure development of toddlers with expressive specific language impairment
    (Cambridge University Press, 2000) Pharr, Aimee Baird; Ratner, Nan Bernstein; Rescorla, Leslie
    A total of 35 children – 20 with expressive specific language impairment (SLI-E) and 15 typically developing (TD) peers – were compared longitudinally from 24 to 36 months with respect to their production of syllable shapes in 10-minute spontaneous speech samples. SLI-E 24-month-olds predominantly produced earlier developing syllable shapes containing vowels, liquids, and glides. TD 24-month-olds and SLI-E 36-month-olds produced approximately the same proportion of syllable types, with the exception of consonant clusters, where TD 24-month-olds produced more than SLI-E 36-month-olds. TD children at 36 months showed the greatest use of syllable shapes containing two different consonants and consonant clusters. Detailed analyses revealed that SLI-E children produced fewer syllable shapes containing final consonants, more than one consonant type, and consonant clusters. Furthermore, the children with SLI-E were found to vocalize less often than their TD peers. The possible relationships between these findings, SLI-E children’s concomitant deficits in morphology and syntax, and the implications for diagnosis and remediation are discussed.