Proper speaking rate is a key attribute of effective communication. Emerging persuasive technologies use computers as a tool to induce human behavioural and attitude changes. This thesis established a computational framework which can persuade people to slow down their speech and communicate more effectively. We defined a conceptual model and implemented a computer software system, both serving as the cornerstones of our persuasion framework. The computer system is designed to persuade people to be aware of their speaking rate and to slow down their speech. The combination of computer technology and persuasive technologies and theories are embedded in the system. In order to conduct effective persuasion, a number of computer-based survey questions were asked and a short tailored letter was generated for each participant. A virtual coach system monitored and reminded the participant to slow down. A few adaptive cues were used to enhance the effects of the persuasion. We evaluated the feasibility and effectiveness of the overall system. At the same time, we evaluated the feasibility of individual elements. A total of 22 participants was selected to make up the sample. The experiments were conducted under controlled conditions. The results indicated that our system is effective in persuading people to speak more slowly. The feedback from users indicated that our system raised their awareness about speaking rate.

Proper speaking rate is a key attribute of effective communication. Emerging persuasive technologies use computers as a tool to induce human behavioural and attitude changes. This thesis established a computational framework which can persuade people to slow down their speech and communicate more effectively. We defined a conceptual model and implemented a computer software system, both serving as the cornerstones of our persuasion framework. The computer system is designed to persuade people to be aware of their speaking rate and to slow down their speech. The combination of computer technology and persuasive technologies and theories are embedded in the system. In order to conduct effective persuasion, a number of computer-based survey questions were asked and a short tailored letter was generated for each participant. A virtual coach system monitored and reminded the participant to slow down. A few adaptive cues were used to enhance the effects of the persuasion. We evaluated the feasibility and effectiveness of the overall system. At the same time, we evaluated the feasibility of individual elements. A total of 22 participants was selected to make up the sample. The experiments were conducted under controlled conditions. The results indicated that our system is effective in persuading people to speak more slowly. The feedback from users indicated that our system raised their awareness about speaking rate.

Nasality is a common resonance disorder present in the speech of severely hearing impaired individuals (Hudgins, 1934). The likely cause has been attributed to structural or functional abnormalities of the velopharyngeal mechanism as well as deviations in pitch and loudness. In addition, hearing impaired individuals speak at a slower rate than normal hearing individuals which has been shown to exacerbate the presence of nasality in their speech (Colton & Cooker, 1968). The purpose of this study was to determine whether deliberate increases in speaking rate would serve to decrease the amount of nasality in the speech of severely hearing impaired individuals. The participants were 11 severe to profoundly hearing impaired students, ranging in age from 12 to 19 years (mean = 16 years). Each participant provided a baseline speech sample (R1) followed by three training sessions during which participants were trained to increase their speaking rate. Following the training sessions, a second speech sample was obtained (R2). Acoustic and perceptual analysis pf the speech samples obtained at R1 and R2 were undertaken. The acoustic analysis focused on changes in first and second formant frequency bandwidth (BW1 & BW2). The perceptual analysis involved 21 naïve listeners rating the speech samples (at R1 & R2) for perceived nasality. Findings indicated a significant increase in speaking rate at R2. In addition, a significantly narrower BW2 frequency and lower perceptual rating score was obtained at R2 across all participants, suggesting a considerable decrease in nasality as speaking rate increases. The influences of speaking rate changes on the functioning of the velopharyngeal mechanism are discussed. In addition, the clinical implications of the findings are explored.

Nasality is a common resonance disorder present in the speech of severely hearing impaired individuals (Hudgins, 1934). The likely cause has been attributed to structural or functional abnormalities of the velopharyngeal mechanism as well as deviations in pitch and loudness. In addition, hearing impaired individuals speak at a slower rate than normal hearing individuals which has been shown to exacerbate the presence of nasality in their speech (Colton & Cooker, 1968). The purpose of this study was to determine whether deliberate increases in speaking rate would serve to decrease the amount of nasality in the speech of severely hearing impaired individuals. The participants were 11 severe to profoundly hearing impaired students, ranging in age from 12 to 19 years (mean = 16 years). Each participant provided a baseline speech sample (R1) followed by three training sessions during which participants were trained to increase their speaking rate. Following the training sessions, a second speech sample was obtained (R2). Acoustic and perceptual analysis pf the speech samples obtained at R1 and R2 were undertaken. The acoustic analysis focused on changes in first and second formant frequency bandwidth (BW1 & BW2). The perceptual analysis involved 21 naïve listeners rating the speech samples (at R1 & R2) for perceived nasality. Findings indicated a significant increase in speaking rate at R2. In addition, a significantly narrower BW2 frequency and lower perceptual rating score was obtained at R2 across all participants, suggesting a considerable decrease in nasality as speaking rate increases. The influences of speaking rate changes on the functioning of the velopharyngeal mechanism are discussed. In addition, the clinical implications of the findings are explored.

This study investigated the effect of speaking rate on aerodynamic and acoustic measures of velopharyngeal (VP) function in 27 adult speakers (14 M, 13 F). The pressure-flow method (Warren & Dubois, 1964) was used to collect aerodynamic data of /m/ and /p/ segments in the word “hamper” and the utterances “Mama made some lemon jam” (MMJ) and “Buy Bobby a puppy” (BBP). A Nasometer was used to collect nasalance scores and nasalance distance for MMJ and BBP. Measures were collected under 4 speaking rate conditions (normal, fast, slow, and slowest). Results indicated that nasal airflow and VP orifice area were unaffected by speaking rate whereas intraoral pressure decreased as speaking rate slowed. Nasalance was greater for BBP at slow speaking rates and nasalance distance (MMJ – BBP) decreased at slow rates. The data was interpreted with respect to expectations set forward in the literature on normal and disordered speech motor control.

This study investigated the effect of speaking rate on aerodynamic and acoustic measures of velopharyngeal (VP) function in 27 adult speakers (14 M, 13 F). The pressure-flow method (Warren & Dubois, 1964) was used to collect aerodynamic data of /m/ and /p/ segments in the word “hamper” and the utterances “Mama made some lemon jam” (MMJ) and “Buy Bobby a puppy” (BBP). A Nasometer was used to collect nasalance scores and nasalance distance for MMJ and BBP. Measures were collected under 4 speaking rate conditions (normal, fast, slow, and slowest). Results indicated that nasal airflow and VP orifice area were unaffected by speaking rate whereas intraoral pressure decreased as speaking rate slowed. Nasalance was greater for BBP at slow speaking rates and nasalance distance (MMJ – BBP) decreased at slow rates. The data was interpreted with respect to expectations set forward in the literature on normal and disordered speech motor control.

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This study explores the effects of manipulating vocal loudness and speech rate on voice onset time (VOT) in normal hearing children and two children with cochlear implants (CIs). 15 normal hearing participants and two participants with CIs produced all six stop consonants in the phrase “It’s a Cod again” while speaking normally, softly, loudly, slowly, and quickly. Consonants were grouped into voiced and voiceless categories for comparison. Results indicated that the group of normal hearing children produced longer VOTs for voiceless stops than voiced across all conditions. When speaking loudly or quickly, VOT values were shorter than at normal levels. When speaking softly or slowly, VOT values were longer than at normal levels. The two children with CIs performed in a similar manner to the normal hearing group; however, VOTs produced by the six-year old participant were consistently longer than those of the normal hearing group across all conditions. / Speech-Language Pathology

Infants of various ages across the first postnatal year have shown behavioral preferences (i.e., more attention) to visual displays when looking resulted in the presentation of Infant-Directed Speech (IDS) compared to Adult-Directed Speech (ADS). Although IDS differs from ADS on a variety of measures, most research has focused on various pitch characteristics (i.e., IDS is higher in absolute pitch and more variable in pitch across utterance length). Work from our lab has found that when the pitch characteristics of IDS were held constant, but the temporal features were manipulated, younger (but not older) infants attended more to slower rates of IDS, even though it was unlikely that they had heard such speech (when speech is spoken at this slow rate, the fundamental frequency cannot be maintained). The purpose of this study was to expand our investigation of how speaking rate affects infant attention by adding the physiological measure of heart rate to our protocol. Of specific interest was whether infants would show differential amounts of heart-rate (HR) decelerations as a function of rate (i.e. greater decelerations to slowed speech). 4-month-old infants were tested with normal IDS (unaltered rate) and slow IDS (rate was twice as slow as normal). Behaviorally, infants did not differentially attend to a display as a function of speech type. Psychophysiologically, infants showed more pronounced HR decelerations to slow than to normal IDS. The discrepancy between measures of attention is discussed, especially with regard to the organization of attention in infants of this age. / Master of Science

This diploma thesis examines speech rate in three different speech styles - in reading, prepared semi-spontaneous monologue and consecutive interpreting from English into Czech. In the first part of the thesis we summarize previous research, define several types of speech rate, pauses and all three speech styles. In the second part, dedicated to empirical research, we first describe the material and speakers, and then we continue with information about recording and processing of the recordings, mainly the two ways of segmentation into inter-pause units. The results are summarized in three sub-chapters; one looks at speaking rate, the next deals with articulation rate and the last one is dedicated to pauses. The last subchapter in the Results chapter compares our findings with both Czech and foreign research into the topic. Altogether we analysed recordings of four female speakers (two students and two prefessional interpreters) in three speech styles. In each of the styles we calculated speaking rate of the whole text, speaking rate of four linear parts (introduction, main part 1, main part 2 and conclusion) and articulation rate of one chosen unit from each linear part. Our results suggest that the highest speaking rate and articulation rate are in reading; semi-spontaneous speech is somewhat...