Visual perception of movement kinematics and the acquisition of "action prototypes"

Sparrow, William A., Shinkfield, Alison, Day, Ross H., Hollit, Sarah and Jolley, Damien 2002, Visual perception of movement kinematics and the acquisition of "action prototypes", Motor control, vol. 6, no. 2, pp. 146-165.

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Title Visual perception of movement kinematics and the acquisition of "action prototypes"
Author(s) Sparrow, William A.
Shinkfield, Alison
Day, Ross H.
Hollit, Sarah
Jolley, Damien
Journal name Motor control
Volume number 6
Issue number 2
Start page 146
End page 165
Publisher Human Kinetics Publishers, Inc
Place of publication Champaign, IL
Publication date 2002-04
ISSN 1087-1640
Keyword(s) visual perception
action categories
action prototypes
movement kinetics
Summary Recognizing a class of movements as belonging to a "nominal" action category, such as walking, running, or throwing, is a fundamental human ability. Three experiments were undertaken to test the hypothesis that common ("prototypical") features of moving displays could be learned by observation. Participants viewed moving stick-figure displays resembling forearm flexion movements in the saggital plane. Four displays (presentation displays) were first presented in which one or more movement dimensions were combined with 2 respective cues: direction (up, down), speed (fast, slow), and extent (long, short). Eight test displays were then shown, and the observer indicated whether each test display was like or unlike those previously seen. The results showed that without corrective feedback, a single cue (e.g., up or down) could be correctly recognized, on average, with the proportion correct between .66 and .87. When two cues were manipulated (e.g., up and slow), recognition accuracy remained high, ranging between .72 and .89. Three-cue displays were also easily identified. These results provide the first empirical demonstration of action-prototype learning for categories of human action and show how apparently complex kinematic patterns can be categorized in terms of common features or cues. It was also shown that probability of correct recognition of kinematic properties was reduced when the set of 4 presentation displays were more variable with respect to their shared kinematic property, such as speed or amplitude. Finally, while not conclusive, the results (from 2 of the 3 experiments) did suggest that similarity (or "likeness") with respect to a common kinematic property (or properties) is more easily recognized than dissimilarity.
Language eng
Field of Research 170112 Sensory Processes, Perception and Performance
HERDC Research category C1 Refereed article in a scholarly journal
Copyright notice ©2002, Human Kinetics Publishers
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Document type: Journal Article
Collection: School of Health Sciences
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