Perceiving affordances for another person's actions.

Stoffregen, Thomas A.; Gorday, Kathleen M.; Sheng, Yang-Yi; Flynn, Steven B.

doi:10.1037/0096-1523.25.1.120

Cited by 86 publications

(86 citation statements)

References 43 publications

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“…The persistence of supra-postural task effects despite the constraining influence of the beam is the most important result of this study. This finding is consistent with related findings from previous studies in which non-material constraints (instructions or tasks) have been placed in conflict with material constraints (e.g., mechanics of the body or of the support surface; Bardy et al, 1999;Marin et al, 1999aMarin et al, , 1999bOullier et al, 2002;Stoffregen, Gorday, Sheng, & Flynn, 1999a). Oullier et al argued that postural coordination can serve to facilitate performance of supra-postural tasks.…”

Section: Influence Of Supra-postural Task Variationsupporting

confidence: 89%

Task-specific Stabilization of Postural Coordination during Stance on a Beam

Oullier¹,

Bardy²,

Stoffregen³

et al. 2004

Motor Control

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Surfaces shorter in extent than the feet elicit multi-joint coordination that differs from what is elicited by stance on extensive surfaces. This well-known effect arises from the mechanics of the actor-environment interaction. Multi-joint control of stance is also known to be influenced by non-mechanical aspects of a situation, including participants' task or intention. Intentional constraints do not originate in mechanics, and for this reason one might suppose that constraints imposed by mechanics would dominate constraints imposed by intentions, when the two were in conflict. We evaluated this hypothesis by varying participants' supra-postural task during stance on a short surface. While standing on a 10-cm wide beam, participants were exposed to optic flow generated by fore-aft oscillations of a moving room. Participants faced a target attached to the front wall of the moving room and were asked either to look at the target (with no instruction to move) or intentionally to track it with their head (i.e., to keep the target-head distance constant). Within trials, we varied the frequency of room (and target) motion, from 0.15 to 0.75 Hz, in steps of 0.05 Hz. In both conditions, ankle and hip rotations exhibited antiphase coordination, but behavior was not identical across conditions. Coupling between motion of the room and the head was stronger for the tracking task than for the looking task, and the stability of ankle-hip coordination was greater during tracking than during looking. These results indicate that the influence of support surface mechanics did not eliminate the influence of the supra-postural task. Environment-based and task-based constraints interacted in determining the coordination of hips and ankles during stance.

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Section: Influence Of Supra-postural Task Variationsupporting

confidence: 89%

Task-specific Stabilization of Postural Coordination during Stance on a Beam

Oullier¹,

Bardy²,

Stoffregen³

et al. 2004

Motor Control

Self Cite

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“…[12][13][14][15] In this approach, a visual target is continuously adjusted until it reaches a position judged by the participant to be the limit of his ⁄ her capability. In alternating trials, the target is moved towards this boundary from opposite directions, i.e.…”

Section: Judgement Procedures and Apparatusmentioning

confidence: 99%

Children at risk for developmental coordination disorder: judgement of changes in action capabilities

Johnson

Wade

2009

Develop Med Child Neuro

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In three separate manipulations, a group of children at risk for developmental coordination disorder (DCD; five males, seven females; mean age 11y 6mo [SD 6.8mo]who were at or below the 15th centile on the Movement ABC) and a group of typically developing children (TDC; seven males, five females; mean age 11y 3mo [SD 6.8mo]) judged the limit of their standing horizontal reach (HRmax) under two conditions in which actual HRmax differed. The manipulations were: (1) one‐hand versus two‐hand reach; and (2) standard versus short effective foot‐length; and (3) rigid versus compliant support surface. For the foot‐length and support surface manipulations (but not for the hand manipulation), children correctly judged that their actual HRmax differed in the two conditions (p<.05). On all three manipulations, TDC made significantly larger adjustments in their judgements than did children at risk for DCD (p<0.05). The TDC group adjusted their judgements in the appropriate direction on all three manipulations, whereas the DCD group adjusted in the appropriate direction for the foot‐length manipulation only. The results suggest that children at risk for DCD are less adept at detecting changes in the limits of their action capabilities.

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“…Research in sport performance contexts has demonstrated that individuals vary in the visual strategies used to undertake specific performance tasks [10], or in the information sources they use to satisfy different intentional constraints [11]. In addition to perceiving information with reference to their own action capabilities, performers are also able to perceive information scaled to the action capabilities of significant others (e.g., teammates or opponents in sport), which in turn may constrain or inform their own actions [12].…”

Section: Ecological Dynamics and General Prin-ciples Of Motor Learningmentioning

confidence: 99%

Principles of Motor Learning in Ecological Dynamics A comment on Functions of Learning and the Acquisition of Motor Skills (With Reference to Sport)

Davids¹

2012

TOSSJ

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This paper provides a commentary on the contribution by Dr Chow who questioned whether the functions of learning are general across all categories of tasks or whether there are some task-particular aspects to the functions of learning in relation to task type. Specifically, they queried whether principles and practice for the acquisition of sport skills are different than what they are for musical, industrial, military and human factors skills. In this commentary we argue that ecological dynamics contains general principles of motor learning that can be instantiated in specific performance contexts to underpin learning design. In this proposal, we highlight the importance of conducting skill acquisition research in sport, rather than relying on empirical outcomes of research from a variety of different performance contexts. Here we discuss how task constraints of different performance contexts (sport, industry, military, music) provide different specific information sources that individuals use to couple their actions when performing and acquiring skills. We conclude by suggesting that his relationship between performance task constraints and learning processes might help explain the traditional emphasis on performance curves and performance outcomes to infer motor learning.

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Perceiving affordances for another person's actions.

Cited by 86 publications

References 43 publications

Task-specific Stabilization of Postural Coordination during Stance on a Beam

Task-specific Stabilization of Postural Coordination during Stance on a Beam

Children at risk for developmental coordination disorder: judgement of changes in action capabilities

Principles of Motor Learning in Ecological Dynamics A comment on Functions of Learning and the Acquisition of Motor Skills (With Reference to Sport)

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