Matching Items (3)
Filtering by
- Creators: College of Health Solutions
- Resource Type: Text
Description
Speech perception and production are bidirectionally related, and they influence each other. The purpose of this study was to better understand the relationship between speech perception and speech production. It is known that applying auditory perturbations during speech production causes subjects to alter their productions (e.g., change their formant frequencies). In other words, previous studies have examined the effects of altered speech perception on speech production. However, in this study, we examined potential effects of speech production on speech perception. Subjects completed a block of a categorical perception task followed by a block of a speaking or a listening task followed by another block of the categorical perception task. Subjects completed three blocks of the speaking task and three blocks of the listening task. In the three blocks of a given task (speaking or listening) auditory feedback was 1) normal, 2) altered to be less variable, or 3) altered to be more variable. Unlike previous studies, we used subject’s own speech samples to generate speech stimuli for the perception task. For each categorical perception block, we calculated subject’s psychometric function and determined subject’s categorical boundary. The results showed that subjects’ perceptual boundary remained stable in all conditions and all blocks. Overall, our results did not provide evidence for the effects of speech production on speech perception.
ContributorsDaugherty, Allison (Author) / Daliri, Ayoub (Thesis director) / Rogalsky, Corianne (Committee member) / College of Health Solutions (Contributor) / Barrett, The Honors College (Contributor)
Created2019-05
Description
This longitudinal study aimed to determine whether significant differences existed between the baseline inaccurate signals of the /r/ phoneme for children that eventually acquire or do not acquire /r/. Seventeen participants ages 5-8 who had not acquired /r/ in any of its allophonic contexts were recorded approximately every 3 months from the age of recruitment until they either acquired /r/ in conversation (80% accuracy) or turned eight years old. The recorded audio files were trimmed and labelled using Praat, and signal processing was used to compare initial and final recordings of three allophonic variations of /r/ (vocalic, prevocalic, postvocalic) for each participant. Differences were described using Mel-log Spectral plots. For each age group, initial recordings of participants that eventually acquired /r/ were compared to those of participants that did not acquire /r/. Participants that had not acquired /r/ and had yet to turn eight years old were compared by whether they were perceived to be improving or perceived not to be improving. Significant differences in Mel-log spectral plots will be discussed, and the implications of baseline differences will be highlighted, specifically with respect to the feasibility of identifying predictive markers for acquisition
on-acquisition of the difficult /r/ phoneme.
on-acquisition of the difficult /r/ phoneme.
ContributorsHom, Rachel (Author) / Weinhold, Juliet (Thesis director) / Daliri, Ayoub (Committee member) / College of Health Solutions (Contributor) / School of International Letters and Cultures (Contributor) / Barrett, The Honors College (Contributor)
Created2019-05
Description
Previous research has determined that sentence comprehension is affected when taxing an individual’s cognitive resources, such as attentional control and working memory. This can be done by manipulating the prosody of simple and complex sentences, by allowing irregular rhythm and pitch changes to occur within speech. In the present thesis, neurotypical adults were asked to comprehend sentences with normal and monotone prosody in three different versions of a sentence-picture matching task. A no-load version served as a control with the other two taxing cognitive resources in these individuals. In addition, individuals completed four other tasks that are known to reliably measure working memory. Our results indicate a possible relationship between high accuracy in complex sentences spoken in a monotone prosody with working memory when time restraints are placed on individuals. Collectively, these results may lead to a new way of working with individuals in speech therapy who have suffered a stroke by better understanding the cognitive resources that are taxed in different types of sentence comprehension settings.
ContributorsRehwalt, Cassandra Kay (Author) / Rogalsky, Corianne (Thesis director) / Azuma, Tamiko (Committee member) / Watts College of Public Service & Community Solut (Contributor) / College of Health Solutions (Contributor, Contributor) / Division of Teacher Preparation (Contributor) / Barrett, The Honors College (Contributor)
Created2019-05