Projekter pr. år
Abstract
Objectives:
Our first aim was to replicate the results obtained by Fusaroli et al. (2013, 2014) in a sample of English speakers, i.e. (1) characterise the speech patterns of adults with ASD and (2) employ the results in a supervised machine-learning process to determine whether acoustic features predict diagnostic status and severity of the symptoms.
In addition we were interested to evaluate how valid the model built based on Danish data would be on English data, i.e. which parameters were dependent and which were independent of the speakers’ language.
Methods:
The context of a previously published study of memory in ASD (Maras et al., 2013) provided audio recordings of 17 ASD and 17 matched Typically Developing (TD) adults attempting to recall details of a standardised event they had participated in. Transcripts were time-coded, and pitch (F0), speech-pause sequences and speech rate were automatically extracted. We conducted traditional statistical analysis on each prosodic feature. We then extracted non-linear measure of recurrence: treating voice as a dynamical system, we reconstructed its phase space and measured the number, duration and structure of repeated trajectories in that space (Marwan et al., 2007). The results were injected to train a linear discriminant function algorithm to classify the descriptions as belonging either to the ASD or TD group. The model was developed and tested using 1000 iterations of 10-fold cross-validation (to test the generalizability of the accuracy) and variational Bayesian mixed-effects inferences (to compensate for biases in sample sizes).
Results:
Preliminary analysis of a sample of English speakers suggest similar results to those obtained in a Danish population: individual with ASD produce highly regular speech patterns organized in short sequences (200-400 ms) being frequently repeated, which support clinical reports of monotony. While features are similar across Danish and English language, the coefficients discriminating individuals with ASD and controls need to be re-trained.
Conclusions:
The current data suggest than ASD adults produce highly regular patterns of speech (as measured by pitch and pause distribution). Importantly this provides a quantifiable measurement to capture some of the clinical reports which contribute to reaching a diagnosis of autism. Further analysis will establish whether voice patterns can be a tool in the diagnostic process or to follow language development in an individual and reliably distinguish autistic- and non autistic-like speech.
Originalsprog | Engelsk |
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Publikationsdato | 2015 |
Antal sider | 1 |
Status | Udgivet - 2015 |
Begivenhed | IMFAR 2015 - Salt Lake City, USA Varighed: 13 maj 2015 → 16 maj 2015 |
Konference
Konference | IMFAR 2015 |
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Land/Område | USA |
By | Salt Lake City |
Periode | 13/05/2015 → 16/05/2015 |
Fingeraftryk
Dyk ned i forskningsemnerne om 'Voice Patterns in Adult English Speakers with Autism Spectrum Disorder'. Sammen danner de et unikt fingeraftryk.Projekter
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Roots of social impairment in schizophrenia and autism
Fusaroli, R. (Projektkoordinator), Simonsen, A. (Deltager), McCabe, R. M. (Deltager), Lambrecht, A. (Deltager), Jørgensen, M. (Deltager) & Weed, E. (Deltager)
13/02/2015 → …
Projekter: Projekt › Forskning
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Clinical Voices in the Wild
Fusaroli, R. (Projektkoordinator), Weed, E. (Deltager), Roy, B. (Deltager), Naigles, L. (Deltager), Simonsen, A. (Deltager), Tylén, K. (Deltager) & Bliksted, V. F. (Deltager)
06/01/2014 → …
Projekter: Projekt › Forskning
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Clinical Voices
Fusaroli, R. (Projektkoordinator), Weed, E. (Deltager), Tylén, K. (Deltager), Simonsen, A. (Deltager), Bliksted, V. F. (Deltager), Bang, D. (Deltager) & Ladegaard, N. L. (Deltager)
08/10/2012 → …
Projekter: Projekt › Forskning