Precision hypothesis and the end-state comfort effect

Short, Martin W.; Cauraugh, James H.

doi:10.1016/s0001-6918(98)00020-1

Cited by 81 publications

(44 citation statements)

References 16 publications

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“…The dependency of the grasp orientation on the to-be-executed rotation is modulated also by the precision requirements at the end of the rotation. High precision requirements attenuate the influence of the rotation on the grasp orientation, whereas low precision requirements may even eliminate it (Rosenbaum et al 1996;Short and Cauraugh 1999). In the latter case, the influence of other factors on the grasp orientation may increase.…”

Section: The End-state Comfort Effectmentioning

confidence: 99%

“…In the latter case, the influence of other factors on the grasp orientation may increase. Most prominently, recent grasp orientation selections tend to be conserved (Kelso et al 1994;Schütz et al in press;Short and Cauraugh 1999; c.f. Cohen and Rosenbaum 2004;Weigelt et al 2009;Rosenbaum et al 2006).…”

Section: The End-state Comfort Effectmentioning

confidence: 99%

“…First, the hypothesis is directly derived from a prominent framework for theories of motor control (optimal control) and a frequently proposed criterion for grasp orientation selection (end-state comfort). Second, the end-state comfort effect is frequently discussed in terms of optimization processes (Johnson 2000;Short and Cauraugh 1999;Rosenbaum et al 1996;Schütz et al in press;van der Vaart 1995). Thirdly, end-state comfort is discussed as an ecologically valid objective, because it is also correlated with movement speed or movement precision (Rosenbaum et al 1996;Short and Cauraugh 1999).…”

Section: End-state Comfort Optimization Hypothesismentioning

confidence: 99%

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The continuous end-state comfort effect: weighted integration of multiple biases

Herbort

Butz

2011

Psychological Research

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The grasp orientation when grasping an object is frequently aligned in anticipation of the intended rotation of the object (end-state comfort effect). We analyzed grasp orientation selection in a continuous task to determine the mechanisms underlying the end-state comfort effect. Participants had to grasp a box by a circular handle-which allowed for arbitrary grasp orientations-and then had to rotate the box by various angles. Experiments 1 and 2 revealed both that the rotation's direction considerably determined grasp orientations and that end-postures varied considerably. Experiments 3 and 4 further showed that visual stimuli and initial arm postures biased grasp orientations if the intended rotation could be easily achieved. The data show that end-state comfort but also other factors determine grasp orientation selection. A simple mechanism that integrates multiple weighted biases can account for the data.

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Section: The End-state Comfort Effectmentioning

confidence: 99%

Section: The End-state Comfort Effectmentioning

confidence: 99%

Section: End-state Comfort Optimization Hypothesismentioning

confidence: 99%

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The continuous end-state comfort effect: weighted integration of multiple biases

Herbort

Butz

2011

Psychological Research

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“…This phenomenon is known as the end-state comfort effect (e.g., Rosenbaum et al, 2004). Three important functional advantages to end a task with a comfortable posture have been indicated (Rosenbaum & Jorgensen, 1992): first, it maximizes the range of movements that can subsequently be performed; second, it enables more precision to be exerted ("precision hypothesis", Short & Cauraugh, 1999); third, kinetically, moving from an uncomfortable posture to a comfortable posture requires less energy than moving toward an uncomfortable posture.…”

mentioning

confidence: 99%

Motor planning in children with cerebral palsy: A longitudinal perspective

Lust

Spruijt

Wilson

et al. 2017

Journal of Clinical and Experimental Neuropsychology

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Introduction: Motor planning is important for daily functioning. Deficits in motor planning can result in slow, inefficient, and clumsy motor behavior and are linked to disruptions in performance of activities of daily living in children with cerebral palsy (CP). However, the evidence in CP is primarily based on cross-sectional data. Method: Data are presented on the development of motor planning in children with CP using a longitudinal design with three measurement occasions, each separated by 1 year. Twenty-two children with CP (9 boys, 13 girls; age in years;months, M = 7;1, SD = 1;2) and 22 age-matched controls (10 boys, 12 girls, M = 7;1, SD = 1;3) participated. Children performed a bar transport task in which some conditions ("critical angles") required participants to sacrifice initial posture comfort in order to achieve end-state comfort. Performance on critical trials was analyzed using linear growth curve modeling. Results: In general, children with CP showed poor end-state planning for critical angles. Importantly, unlike in controls, motor planning ability did not improve across the three measurement occasions in children with CP. Conclusion: These longitudinal results show that motor planning issues in CP do not resolve with development over childhood. Strategies to enhance motor planning are suggested for intervention.

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“…Participants behaved similarly in a 'handle' task (Rosenbaum, Vaughan, Barnes & Jorgensen, 1992). Further studies indicated that participants trade off an awkward starting position for a comfortable end position to ensure that during the crucial end phase of the movement the hand is in a position where it can be finely controlled (Short & Cauraugh, 1999).…”

Section: Introductionmentioning

confidence: 99%

The Development of Locomotor Planning for End-State Comfort

2010

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The full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-pro t purposes provided that:• a full bibliographic reference is made to the original source • a link is made to the metadata record in DRO • the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders.Please consult the full DRO policy for further details. AbstractWalking through real world environments involves complex choices between alternative routes, and the ability to make such choices must develop through childhood. We examine performance in one such situation. We use a novel paradigm analogous to manual 'end-state comfort' (ESC) planning tasks, where an uncomfortable manouevre at the start of a movement is traded off for comfort at its end. We find that adults show locomotor ESC planning, adjusting feet at the start of a route in order to gain comfort at its end (cross a manageable gap between two stepping stones). 3 -6 year olds also make this trade-off, but to a lesser degree than adults. The results suggest that end-state comfort is an important determiner of locomotor behaviour, and show an early ability to engage in locomotor end-state comfort planning.The development of locomotor planning for end-state comfort 3

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Precision hypothesis and the end-state comfort effect

Cited by 81 publications

References 16 publications

The continuous end-state comfort effect: weighted integration of multiple biases

The continuous end-state comfort effect: weighted integration of multiple biases

Motor planning in children with cerebral palsy: A longitudinal perspective

The Development of Locomotor Planning for End-State Comfort

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