Force and Timing Components of the Motor Program

Ivry, Richard B.

doi:10.1080/00222895.1986.10735390

Cited by 57 publications

(31 citation statements)

References 37 publications

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“…The trial-by-trial zero correlation of RT and RD at least allows for the possibility that the adjustment takes place later than, and independent of, the RT interval -an assumption shared by several recent models of motor control (Desmurget & Grafton, 2000;Glover & Dixon, 2001;Ivry, 1986;Spijkers, et al, 1981). However, a closer investigation of this question is clearly warranted.…”

Section: Discussionmentioning

confidence: 92%

Temporal response-effect compatibility

Kunde

2003

Psychological Research

133

121

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This study investigated the impact of duration-varying response effects on the generation and execution of duration-varying responses. Participants performed short or long keypresses which produced auditory effects of corresponding duration (short response ->short tone, long response ->long tone) or of noncorresponding duration (short response ->long tone, long response ->short tone). Experiment 1 revealed faster responding with a corresponding than with a noncorresponding Response-Effect (R-E) mapping; that is, a temporal R-E compatibility effect. Additionally, increasing effect duration increased response latencies, whereas it decreased keypress duration. Experiment 2 showed that the influence of temporal R-E compatibility persists even when responses are cued in advance, suggesting that at least part of it originates from response generation processes occurring later than a traditional response selection stage. These findings corroborate and complement effect-based theories of action control which assume that the selection, initiation, and execution of movements is mediated by anticipation of their sensory effects.

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Section: Discussionmentioning

confidence: 92%

Temporal response-effect compatibility

Kunde

2003

Psychological Research

133

121

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“…An important finding is that as the number of elements in a sequence becomes larger than about five, latency levels off, and it might even decrease with further increasing sequence length (e.g., Garcia-Colera & Semjen, 1988;Ivry, 1986;Rosenbaum, Hindorff, & Munro, 1987). Furthermore, if one of the later elements in a longer sequence deviates from the others in one particular respect (e.g., another force or execution rate), an earlier element is slowed instead of sequence latency (e.g., Piek, Glencross, Barrett, & Love, 1993;Sidaway et al, 1999).…”

Section: Teun Elkelboommentioning

confidence: 97%

Evidence for Lasting Sequence Segmentation in the Discrete Sequence-Production Task

Verwey

Eikelboom

2003

Journal of Motor Behavior

104

111

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It is well known that movement sequences are initiated and executed more slowly as they become longer. Those effects of sequence length, which have been found to lessen with practice, have been attributed to the development of a single motor chunk that represents the entire sequence. But an increasingly efficient distribution of programming can also explain the effects. To examine the mechanisms underlying skill in executing keying sequences, the authors examined the performance of participants (N = 18) who practiced a discrete sequence-production task involving fixed sequences of 3 and 6 key presses. Detailed examination of the effects of extensive practice, of regularities in key pressing order, and of a preceding choice RT task on the production of those sequences showed that most participants executed the 6-key sequence as 2 or more successive segments and continued to do so in the various conditions. The preceding choice RT task restored the sequence-length effect in latency that had disappeared with practice. The present results suggest that practice induces the development of motor chunks, each representing a short segment, and with longer sequences a control scheme for concatenating the motor chunks. Segmentation of longer sequences appeared to be concealed by individual segmentation differences unless there were regularities that imposed a common segmentation pattern.

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“…This paradigm has been employed for the study of normal adult populations as well as for investigating underlying timing deficits in adult populations with Huntington's disease and Parkinson's disease (Ivry & Keele, 1989). Ivry (1986) argues that the parameters of timing and force are separate components specified by different neural systems. Component analysis allows investigation into the relationship between the neural structures and cognitive processes involved in motor coordination (Ivry & Corcos, 1991).…”

Section: Introductionmentioning

confidence: 99%

Timing and force control during a sequential tapping task in children with and without motor coordination problems

Piek

Skinner

1999

J Int Neuropsychol Soc

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In the present study a sequential tapping task was used to compare the planning and execution of finger tapping sequences in children with motor coordination problems (clumsy children) and control children. Fifteen children with significant movement problems were compared to 15 control children matched on age, sex, and Verbal IQ. The clumsy children took significantly longer to initiate the movement sequence (i.e., reaction time). During the execution of the sequence, the clumsy children left their finger on the tap plate for significantly longer for each tap than the control children. No significant differences were found between the groups for the time taken between the taps, or mean average force. Past research has indicated that the source of timing problems in clumsy children may lie in a central timing mechanism possibly the cerebellum, whereas the evidence from the present study indicates an impairment of the peripheral processes may be a more important contributor to timing deficits in clumsy children. (JINS, 1999, 5, 320-329.)

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Force and Timing Components of the Motor Program

Cited by 57 publications

References 37 publications

Temporal response-effect compatibility

Temporal response-effect compatibility

Evidence for Lasting Sequence Segmentation in the Discrete Sequence-Production Task

Timing and force control during a sequential tapping task in children with and without motor coordination problems

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