The nonlinear dynamics of speech categorization.

Tuller, Betty; Case, Pamela; Ding, Mingzhou; Kelso, J. A. Scott

doi:10.1037/0096-1523.20.1.3

“…We took up this challenge by examining to what extent a dynamical model could account for participants' reports about the predicted outcome of an imagined action. The patterns of responses by participants were found to be in close agreement with the predictions of a two-attractor model (Tuller et al, 1994).…”

Section: Discussionsupporting

confidence: 73%

“…The key to studying a cognitive system then is to make the dynamics underlying the system's behavior observable. One observable effect that is classically associated with dynamical systems is hysteresis (Case, Tuller, Ding, & Kelso, 1995;Gilmore, 1992;Kelso, 1995;Tuller et al, 1994).…”

Section: Dynamical Systems Theorymentioning

confidence: 99%

“…Given that the task we studied involved discerning which rods enabled successful reaching and which did not, we used a dynamical model to account for behavior with two attractor states. Tuller and colleagues (Case et al, 1995;Tuller et al, 1994) designed such a model for speech categorization phenomena. Following the example of Tuller et al we used Eq.…”

Section: Model Descriptionmentioning

confidence: 99%

“…3. Tuller et al (1994) specified a slightly different relationship between the control parameter k and the experimental variable λ. First, they included a step function for the effect of repetitions; i.e., repetitions were assumed to take effect only after some critical number of repetitions were reached.…”

Section: Notesmentioning

confidence: 99%

“…Following Tuller et al (1994) we assume that the relationship between the control parameter and the independent variable is not a one-to-one correspondence. Instead, we assume that k is a function of (1) rod-length, (2) the level of adaptation (which is a function of both repetitions, and length of rod on previous trial) and (3) random factors scaling the effect of (2) such as perceptual and cognitive characteristics of the participant.…”

Section: Model Descriptionmentioning

confidence: 99%

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A non-representational approach to imagined action

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Bongers

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Haselager

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2002

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This study addresses the dynamical nature of a "representation-hungry" cognitive task involving an imagined action. In our experiment, participants were handed rods that systematically increased or decreased in length on subsequent trials. Participants were asked to judge whether or not they thought they could reach for a distant object with the hand-held rod. The results are in agreement with a dynamical model, extended from Tuller, Case, Ding, and Kelso (1994). The dynamical effects observed in this study suggest that predictive judgments regarding the possibility or impossibility of a certain action can be understood in terms of dynamically evolving basins of attraction instead of as depending on representational structures.

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Speech Production and Perception

Fowler

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2003

Handbook of Psychology

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One way to investigate speech motor learning is to create artificial adaptation situations by perturbing speakers' auditory feedback in real time. Formant perturbations were introduced by Houde and Jordan (1998), providing the first evidence that speakers adapt their pronunciation to compensate for these perturbations. Twenty years later, this chapter provides an overview of the general impact of Houde and Jordan's work in speech research and beyond, as well as a more detailed review of studies that involve formant perturbations. The impact of Houde and Jordan's work appears to be cross-disciplinary. Although mainly related to speech production and perception, it has also been cited in the limb movement and even animal research, mainly as evidence of adaptive sensorimotor control. Formant perturbations research has expanded rapidly since 2006, spreading across the world and many research teams. We identified 77 experimental studies focused on formant perturbations which we then analyzed with regard to technical and theoretical issues. This analysis showed that various apparatuses and procedures were used to address important topics of speech research. A primary interest has been in feedback and feedforward control mechanisms in speech. These mechanisms were addressed in different populations, including adults and children with typical vs. atypical development, with behavioral or neurophysiological approaches, or both. Some formant perturbations studies more specifically focused on the integration of auditory and somatosensory feedback in speech production, while others explored the interaction between speech production and perception of phonemic contrasts. Some research questioned the processes and the nature of speech representations by investigating generalization of adaptation to formant perturbations. Finally, a few studies were interested in the effect of extraneous variables such as surface effects or speakers' general cognitive abilities. Altogether, these studies provide insights into speech motor control in general and into the understanding of sensorimotor interactions in particular. The field has developed recently and may still expand in the future, as it allows us to address fundamental topics in speech research such as perception-production links or abstract vs. exemplar representations. Future Caudrelier and Rochet-Capellan research with formant perturbations may also further connect sensorimotor adaptation to linguistic and cognitive factors and in particular to working and long-term memory.

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Speech Production and Perception

Fowler¹,

Iskarous²

2012

Handbook of Psychology, Second Edition

0

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One way to investigate speech motor learning is to create artificial adaptation situations by perturbing speakers' auditory feedback in real time. Formant perturbations were introduced by Houde and Jordan (1998), providing the first evidence that speakers adapt their pronunciation to compensate for these perturbations. Twenty years later, this chapter provides an overview of the general impact of Houde and Jordan's work in speech research and beyond, as well as a more detailed review of studies that involve formant perturbations. The impact of Houde and Jordan's work appears to be cross-disciplinary. Although mainly related to speech production and perception, it has also been cited in the limb movement and even animal research, mainly as evidence of adaptive sensorimotor control. Formant perturbations research has expanded rapidly since 2006, spreading across the world and many research teams. We identified 77 experimental studies focused on formant perturbations which we then analyzed with regard to technical and theoretical issues. This analysis showed that various apparatuses and procedures were used to address important topics of speech research. A primary interest has been in feedback and feedforward control mechanisms in speech. These mechanisms were addressed in different populations, including adults and children with typical vs. atypical development, with behavioral or neurophysiological approaches, or both. Some formant perturbations studies more specifically focused on the integration of auditory and somatosensory feedback in speech production, while others explored the interaction between speech production and perception of phonemic contrasts. Some research questioned the processes and the nature of speech representations by investigating generalization of adaptation to formant perturbations. Finally, a few studies were interested in the effect of extraneous variables such as surface effects or speakers' general cognitive abilities. Altogether, these studies provide insights into speech motor control in general and into the understanding of sensorimotor interactions in particular. The field has developed recently and may still expand in the future, as it allows us to address fundamental topics in speech research such as perception-production links or abstract vs. exemplar representations. Future Caudrelier and Rochet-Capellan research with formant perturbations may also further connect sensorimotor adaptation to linguistic and cognitive factors and in particular to working and long-term memory.

show abstract

The nonlinear dynamics of speech categorization.

Cited by 144 publications

References 58 publications

A non-representational approach to imagined action

A non-representational approach to imagined action

Speech Production and Perception

Speech Production and Perception

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