Um, so, like, do speech disfluencies matter? A parametric evaluation of filler sounds and words.

This study evaluated how speech disfluencies affect perceived speaker effectiveness. Speeches with filler sounds and filler words at different rates of disfluencies (i.e., 0, 2, 5, and 12 per minute) were created and evaluated by a crowdsourcing service for survey-based research for the speaker's public speaking performance. Increased disfluencies, particularly filler sounds, significantly affected perceptions across most categories, notably at higher rates of filler sounds (i.e., 12 per minute). A low, but nonzero, rate of disfluencies (5 per minute) did not adversely affect perceived effectiveness. These findings suggest that although reducing filler sounds is crucial for optimizing perceived speaking effectiveness, a rate of five or fewer disfluencies per minute may be acceptable.

The efficacy of remote video-based behavioral skills training and awareness training on public speaking performance.

This study evaluated the efficacy of (a) remote video-based behavioral skills training (BST) with added speech outlines on teaching public speaking behaviors and (b) remote video-based awareness training (AT) on speech-disfluency rates. A multiple-baseline design across speech behaviors was used to evaluate the training. Remote video-based BST and AT were effective at teaching public speaking behaviors and reducing speech disfluencies, respectively, for both participants. In addition, performance generalized to increased audience size. Although expert ratings of perceived public speaking effectiveness improved following BST, the ratings did not improve and some worsened following AT. Both participants reported satisfaction with video-based BST and AT. One participant reported greater comfort, confidence, overall ability, and less anxiety as a public speaker following BST. Both participants reported greater improvements in those categories following AT. Our results suggest that public speaking behaviors can be taught using remote video-based BST and speech disfluencies can be reduced using remote video-based AT.

Acquired Stuttering in Parkinson's Disease.

Background: Parkinson's disease frequently causes communication impairments, but knowledge about the occurrence of new-onset stuttering is limited. Objectives: To determine the presence of acquired neurogenic stuttering and its relationship with cognitive and motor functioning in individuals with Parkinson's disease. Method: Conversation, picture description, and reading samples were collected from 100 people with Parkinson's disease and 25 controls to identify the presence of stuttered disfluencies (SD) and their association with neuropsychological test performance and motor function. Results: Participants with Parkinson's disease presented with twice as many stuttered disfluencies during conversation (2.2% ± 1.8%SD) compared to control participants (1.2% ± 1.2%SD; P < 0.01). 21% of people with Parkinson's disease (n = 20/94) met the diagnostic criterion for stuttering, compared with 1/25 controls. Stuttered disfluencies also differed significantly across speech tasks, with more disfluencies during conversation compared to reading (P < 0.01). Stuttered disfluencies in those with Parkinson's disease were associated with longer time since disease onset (P < 0.01), higher levodopa equivalent dosage (P < 0.01), and lower cognitive (P < 0.01) and motor scores (P < 0.01). Conclusion: One in five participants with Parkinson's disease presented with acquired neurogenic stuttering, suggesting that speech disfluency assessment, monitoring and intervention should be part of standard care. Conversation was the most informative task for identifying stuttered disfluencies. The frequency of stuttered disfluencies was higher in participants with worse motor functioning, and lower cognitive functioning. This challenges previous suggestions that the development of stuttered disfluencies in Parkinson's disease has purely a motoric basis.

Public speaking disfluencies: A review of habit reversal training and research.

From 2016 to 2022, the Journal of Applied Behavior Analysis published 7 studies that evaluated the effects of habit reversal training on speech disfluencies (filled pauses) during public speaking. This review summarizes the participants, dependent variables, procedures, experimental design, and outcomes from this research including practice implications and suggested areas of inquiry.

The efficacy of remote video-based training on public speaking.

This study evaluated the efficacy of remote video-based behavioral skills training (BST) on teaching public speaking behaviors to 4 participants. A multiple-baseline design across speech behaviors was used to evaluate the effects of the training. Remote video-based BST was effective at increasing public speaking behaviors for all participants. In addition, performance generalized to an increased audience size. An external expert in communications rated the participants as more effective public speakers following training. All participants reported satisfaction with the training and expressed greater comfort, confidence, overall ability, and less anxiety as a public speaker following training. We also measured potential collateral effects of teaching public speaking behaviors on speech disfluencies. Although remote video-based BST was effective for all participants, it did not produce a change in the rate of speech disfluencies. Our findings indicate that public speaking behaviors can be taught using a remote video-based BST package.

A component analysis of awareness training for reducing speech disfluencies.

Recent literature supports using an awareness training treatment package to decrease speech disfluencies for college students delivering short speeches. This package includes identifying speech disfluencies first via a video recording (video training), then during in vivo speech practice (in vivo training). However, the literature lacks an evaluation of these subcomponents, which poses a barrier to better understanding the efficiency, social validity, and potential underlying behavioral principles of awareness training. We conducted an add-in component analysis with 8 college students by implementing either video or in vivo training first, evaluating treatment effects via a posttest, then implementing the remaining subcomponent, if warranted. We found that in vivo speech practice may be sufficient for reducing disfluencies for some participants, but a treatment package including the sequential application of both video and in vivo training is more likely to result in marked behavior change.

Comparison of Disfluent and Ungrammatical Speech of Preadolescents with and without ASD.

This paper analyses disfluencies and ungrammatical expressions in the speech of 11-13-year-old Finnish-speaking boys with ASD (N = 5) and with neurotypical development (N = 6). The ASD data were from authentic group therapy sessions and neurotypical data from teacher-led group discussions. The proportion of disfluencies and ungrammatical expressions was greater in the speech of participants with ASD (26.4%) than in the control group (15.5%). Furthermore, a qualitative difference was noted: The ASD group produced long, complex disfluent turns with word searches, self-repairs, false starts, fillers, prolongations, inconsistent syntactic structures and grammatical errors, whereas in the control group, the disfluencies were mainly fillers and sound prolongations. The disfluencies and ungrammatical expressions occurring in the ASD participants' interactions also caused comprehension problems.

Speech disfluencies in bilingual Yiddish-Dutch speaking children.

In this study, we investigated the frequency and types of stuttering-like (SLD) and other (OD) disfluencies in 59 typically developing bilingual Yiddish-Dutch (YD) speaking children. Participants were divided in two age categories: 6.01-7.07 and 9.00-10.04-year-olds. All children (1) were successive, bilingual YD speaking, (2) had Yiddish as their dominant language and (3) were sufficiently intelligible in both languages. A conversation sample of at least 300 syllables was collected in each of the two languages. The main findings in this study were (a) the total amount of SLD as well as OD were significantly higher in the non-dominant language. For the SLD, this was mainly caused by the higher frequency of monosyllabic word and syllable repetitions. For the OD, almost all disfluency types seem to have contributed to this. (b) The total amount of OD was significantly higher in the older group of bilingual YD children than in the younger group. This was primarily due to higher frequencies of phrase repetitions, lexical revisions and unfinished words. (c) The monolingual diagnostic guideline of three SLD per 100 words as a means to label stuttering cannot be used in this bilingual population. The majority of the non-stuttering children scored higher than the standard 3% SLD in both languages. In the dominant Yiddish language, 27 children (46%) scored above this percentage, in the non-dominant Dutch language, 46 children (78%).We conclude that bilingual YD-speaking children have a higher frequency of speech disfluencies in comparison to monolingual children. Consequently, monolingual stuttering guidelines cannot be used in this bilingual population.

Reducing speech disfluencies during public speaking using brief habit reversal.

Recent research has evaluated the effects of brief habit reversal, consisting of either awareness training (AT) and competing response training (Mancuso & Miltenberger, 2016), or AT alone (Spieler & Miltenberger, 2017) in reducing speech disfluencies during public speaking. Although both formats of brief habit reversal reduced rates of speech disfluencies, results suggested that teaching a competing response (CR) may produce better outcomes. We aimed to replicate and extend those studies by evaluating the effects of AT and instructing the use of a CR (a silent pause) on rates of speech disfluencies and CRs during public speaking. Following training, all 4 participants demonstrated a reduction of speech disfluencies, and 1 participant demonstrated moderate levels of CRs when giving a speech in front of both a single experimenter and small audience. For 1 participant, generalized effects were demonstrated when presenting in front of a class.

Awareness training reduces college students' speech disfluencies in public speaking.

Recent research suggests that a modified habit reversal procedure, including awareness training alone or combined with competing response training, is effective in decreasing speech disfluencies for college students. However, these procedures are potentially lengthy, sometimes require additional booster sessions, and could result in covariation of untargeted speaker behavior. We extended prior investigations by evaluating awareness training as a sole intervention while also measuring collateral effects of treatment on untargeted filler words and rate of speech. We found awareness training was effective for all participants without the use of booster sessions, and covariation between targeted filler words and secondary dependent variables was idiosyncratic across participants.

Uh and euh signal novelty for monolinguals and bilinguals: evidence from children and adults.

Previous research suggests that English monolingual children and adults can use speech disfluencies (e.g., uh) to predict that a speaker will name a novel object. To understand the origins of this ability, we tested 48 32-month-old children (monolingual English, monolingual French, bilingual English-French; Study 1) and 16 adults (bilingual English-French; Study 2). Our design leveraged the distinct realizations of English (uh) versus French (euh) disfluencies. In a preferential-looking paradigm, participants saw familiar-novel object pairs (e.g., doll-rel), labeled in either Fluent ("Look at the doll/rel!"), Disfluent Language-consistent ("Look at thee uh doll/rel!"), or Disfluent Language-inconsistent ("Look at thee euh doll/rel!") sentences. All participants looked more at the novel object when hearing disfluencies, irrespective of their phonetic realization. These results suggest that listeners from different language backgrounds harness disfluencies to comprehend day-to-day speech, possibly by attending to their lengthening as a signal of speaker uncertainty. Stimuli and data are available at .

Five-Year-Olds' and Adults' Use of Paralinguistic Cues to Overcome Referential Uncertainty.

An eye-tracking methodology was used to explore adults' and children's use of two utterance-based cues to overcome referential uncertainty in real time. Participants were first introduced to two characters with distinct color preferences. These characters then produced fluent ("Look! Look at the blicket.") or disfluent ("Look! Look at thee, uh, blicket.") instructions referring to novel objects in a display containing both talker-preferred and talker-dispreferred colored items. Adults (Expt 1, n = 24) directed a greater proportion of looks to talker-preferred objects during the initial portion of the utterance ("Look! Look at…"), reflecting the use of indexical cues for talker identity. However, they immediately reduced consideration of an object bearing the talker's preferred color when the talker was disfluent, suggesting they infer disfluency would be more likely as a talker describes dispreferred objects. Like adults, 5-year-olds (Expt 2, n = 27) directed more attention to talker-preferred objects during the initial portion of the utterance. Children's initial predictions, however, were not modulated when disfluency was encountered. Together, these results demonstrate that adults, but not 5-year-olds, can act on information from two talker-produced cues within an utterance, talker preference, and speech disfluencies, to establish reference.

An Analysis of Speech Disfluencies of Turkish Speakers Based on Age Variable.

The focus of this research is to verify the influence of the age variable on fluent Turkish native speakers' production of the various types of speech disfluencies. To accomplish this, four groups of native speakers of Turkish between ages 4-8, 18-23, 33-50 years respectively and those over 50-year-olds were constructed. A total of 84 participants took part in this study. Prepared and unprepared speech samples of at least 300 words were collected from each participant via face-to-face interviews that were tape recorded and transcribed; for practical reasons, only the unprepared speech samples were collected from children. As a result, for the prepared speech situation, there was no statistically significant difference in terms of age in the production rates of filled gaps, false starts, slips of the tongue and repetitions; however, participants in the over 50-year-old group produced more hesitations and prolongations than participants in the 18-23 and 33-50-year-old groups. For the unprepared speech situation, age variable was not effective on the production rates of filled gaps. However, 4-8 and over 50-year-old participants produced more hesitations and prolongations than the 18-23 and 33-50-year-old groups. 4-8-year-old children produced more slips of the tongue than the 18-23 and 33-50-year-old groups, and more false starts and repetitions than the participants in the other three age groups (18-23, 33-50, over 50). Further analyses revealed more extensive insights related to the types of disfluencies, the position of disfluencies, and the linguistic units involved in disfluency production in Turkish speech.

When it is apt to adapt: Flexible reasoning guides children's use of talker identity and disfluency cues.

An eye-tracking methodology was used to examine whether children flexibly engage two voice-based cues, talker identity and disfluency, during language processing. Across two experiments, 5-year-olds (N = 58) were introduced to two characters with distinct color preferences. These characters then used fluent or disfluent instructions to refer to an object in a display containing items bearing either talker-preferred or talker-dispreferred colors. As the utterance began to unfold, the 5-year-olds anticipated that talkers would refer to talker-preferred objects. When children then encountered a disfluency in the unfolding description, they reduced their expectation that a talker was about to refer to a preferred object. The talker preference-related predictions, but not the disfluency-related predictions, were attenuated during the second half of the experiment as evidence accrued that talkers referred to dispreferred objects with equal frequency. In Experiment 2, the equivocal nature of talkers' referencing was made more apparent by removing neutral filler trials, where objects' colors were not associated with talker preferences. In this case, children ceased making all talker-related predictions during the latter half of the experiment. Taken together, the results provide insights into children's use of talker-specific cues and demonstrate that flexible and adaptive forms of reasoning account for the ways in which children draw on paralinguistic information during real-time processing.

Speech disfluencies in children with Down Syndrome.

PURPOSE: Speech and language development in individuals with Down syndrome is often delayed and/or disordered and speech disfluencies appear to be more common. These disfluencies have been labeled over time as stuttering, cluttering or both. FINDINGS: were usually generated from studies with adults or a mixed age group, quite often using different methodologies, making it difficult to compare findings. Therefore, the purpose of this study was to analyze and describe the speech disfluencies of a group, only consisting of children with Down Syndrome between 3 and 13 years of age. METHOD: Participants consisted of 26 Dutch-speaking children with DS. Spontaneous speech samples were collected and 50 utterances were analyzed for each child. Types of disfluencies were identified and classified into stuttering-like (SLD) and other disfluencies (OD). The criterion of three or more SLD per 100 syllables (cf. Ambrose & Yairi, 1999) was used to identify stuttering. Additional parameters such as mean articulation rate (MAR), ratio of disfluencies, and telescoping (cf. Coppens-Hofman et al., 2013) were used to identify cluttering and to differentiate between stuttering and cluttering. RESULTS & CONCLUSION: Approximately 30 percent of children with DS between 3 and 13 years of age in this study stutter, which is much higher than the prevalence in normally developing children. Moreover, this study showed that the speech of children with DS has a different distribution of types of disfluencies than the speech of normally developing children. Although different cluttering-like characteristics were found in the speech of young children with DS, none of them could be identified as cluttering or cluttering-stuttering.

Beyond stuttering: Speech disfluencies in normally fluent French-speaking children at age 4.

The aim of this study was to establish normative data on the speech disfluencies of normally fluent French-speaking children at age 4, an age at which stuttering has begun in 95% of children who stutter (Yairi & Ambrose, 2013). Fifty monolingual French-speaking children who do not stutter participated in the study. Analyses of a conversational speech sample comprising 250-550 words revealed an average of 10% total disfluencies, 2% stuttering-like disfluencies and around 8% non-stuttered disfluencies. Possible explanations for these high speech disfluency frequencies are discussed, including explanations linked to French in particular. The results shed light on the importance of normative data specific to each language.

Thee, uhh disfluency effect in preschoolers: A cue to discourse status.

Speech disfluencies, such as filled pauses (ummm, uhhh), are increasingly recognized as an informative element of the speech stream. Here, we examined whether 2- and 3-year-olds expected that the presence of filled pause would signal reference to objects that are new to a discourse. Children viewed pairs of familiar objects on a screen and heard a speaker refer to one of the objects twice in succession. Next, children heard a critical utterance and were asked to look and point at either the discourse-given (i.e., previously mentioned) or discourse-new (i.e., previously unmentioned) object using a fluent ('Look at the ball!') or disfluent ('Look at thee uh ball!') expression. The results indicated that 3-year-old children, but not 2-year-old children, initially expected the speaker to continue to refer to given information in the critical utterance. Upon hearing a filled pause, however, both 2- and 3-year-old children's looking patterns reflected increased looks to discourse-new objects, although the timing of the effect differed between the age groups. Together, these findings demonstrate that young children have an emerging understanding of the role of filled pauses in speech.

Speech disfluencies of preschool-age children who do and do not stutter.

PURPOSE: The goals of the present study were to investigate whether (1) the speech disfluencies of preschool-age children are normally distributed; (2) preschool-age children who do (CWS) and do not stutter (CWNS) differ in terms of non-stuttered disfluencies; (3) age, gender, and speech-language ability affect the number and type of disfluencies children produce; and (4) parents' expressed concern that their child stutters is associated with examiners' judgments of stuttered disfluency. METHOD: Four hundred and seventy two children participated, of which 228 were CWS (56 girls), and 244 CWNS (119 girls). Participants provided conversational speech samples that were analyzed for frequency of occurrence of (a) stuttered disfluencies, (b) non-stuttered disfluencies, and (c) total disfluencies. RESULTS: Results indicated that the underlying distributions of preschool-age children's stuttered and non-stuttered disfluency counts followed a negative binomial distribution (i.e., were not normal), with more children "piling up" at the low end [none or few disfluencies] and fewer children scoring in the upper [more severe stuttering] end of the distribution. Findings also indicated that non-stuttered disfluencies significantly predicted CWS/CWNS talker group classification, information that may be helpful to augment, but not supplant, talker group classification criteria based on stuttered disfluencies. Moreover, expressed parental concern about stuttering was strongly associated with frequency of stuttered disfluencies. CONCLUSION: Findings suggest that the entirety of preschool-age CWS' speech disfluencies - non-stuttered as well as stuttered - differs from that of their CWNS peers and that because these disfluencies are not normally distributed statistical analyses assuming normality of distribution are not the most appropriate means to assess these differences. In addition, certain "third-order" variables (e.g., gender) appear to impact frequency of children's disfluencies and expressed parental concerns about stuttering are meaningfully related to examiners' judgments of stuttered disfluencies. LEARNING OUTCOMES: The reader will recognize differences in speech disfluencies of preschool-age children who do and do not stutter. The reader will recognize whether age, gender and speech-language ability affect the number and type of disfluencies children produce. The reader will describe whether parental concern about stuttering is associated with examiners' judgments of stuttering.