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http://worldcat.org/entity/work/id/22885617

The representation and reproduction of two-dimensional movement patterns

The data also suggested that subjects will use egocentric referents to both specify the orientation of the criterion and to reproduce the form under different spatial conditions, although it is possible that these referents are not identical in each phase, or among different individual subjects. While the mental transformations suggested by the latency profiles closely resembled those associated with mental image rotation, and confirm predictions of other research on movement-based cognitive maps, several qualifications to such an interpretation are offered.

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  • "The data also suggested that subjects will use egocentric referents to both specify the orientation of the criterion and to reproduce the form under different spatial conditions, although it is possible that these referents are not identical in each phase, or among different individual subjects. While the mental transformations suggested by the latency profiles closely resembled those associated with mental image rotation, and confirm predictions of other research on movement-based cognitive maps, several qualifications to such an interpretation are offered."@en
  • "In both experiments, subjects drew two-dimensional, three-segment criterion patterns with one limb and were asked to remember the pattern and all its topographic properties (segment lengths, intersegmental angles, etc) so as to be able to reproduce the patterns as accurately as possible at one of four orientations on the table (at the criterion, 0$\sp\circ$, or at 45$\sp\circ$, 90$\sp\circ$, or 135$\sp\circ$, clockwise from it), with either the same or the contralateral limb, and in either the same or the reversed version. Unlike Experiment 1, during which the orientation of the criterion form always coincided with the egocentric sagittal axis (as well as the environmental table and room axes), the criterion orientation in Experiment 2 was varied."@en
  • "The time it took subjects to plan the reproduction attempts under the factorial combination of these conditions, taken in conjunction with the spatial errors of reproduction, were taken to be an indication of the cognitive costs of the mental transformations over the represented form required to conform to the instructions for mental transformations as well as the nature of the reference system(s) being utilized. In both experiments, the data revealed that planning time for reproductions increased systematically near-linear as the instructed orientation of reproduction deviated from that of the criterion. However, having to alter the limb and/or version at reproduction had no systematic effect on planning latency. The error data indicated that systematic distortions were manifested in the reproductions and suggested that these distortions derive from the represented form and not from limb movement inaccuracy at certain locations within the workspace."@en
  • "The related issues of how movement patterns made in the absence of vision are mentally represented and how these representations are operated over were examined in two experiments. Previous research has implied that degrees of abstraction of specific kinesthetic information occurs as the task context demands. However, little is understood about the format, the contents, and the structure of such abstract representational systems. Nor has the utilization of available frames of reference been widely considered. The reported experiments were intended to offer constraints on the possible characteristics of such representational systems for movements and to empirically contrast predictions associated with alternative systems."@en

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  • "Thèses et écrits académiques"
  • "Microformes"

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  • "The representation and reproduction of two-dimensional movement patterns"@en
  • "The representation and reproduction of two-dimensional movement patterns"

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