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• W2023555797 startingPage "13" @default.
• W2023555797 abstract "Body movements are recognized with speed and precision, even from strongly impoverished stimuli. While cortical structures involved in biological motion recognition have been identified, the nature of the underlying perceptual representation remains largely unknown. We show that visual representations of complex body movements are characterized by perceptual spaces with well-defined metric properties. By multidimensional scaling, we reconstructed from similarity judgments the perceptual space configurations of stimulus sets generated by motion morphing. These configurations resemble the true stimulus configurations in the space of morphing weights. In addition, we found an even higher similarity between the perceptual metrics and the metrics of a physical space that was defined by distance measures between joint trajectories, which compute spatial trajectory differences after time alignment using a robust error norm. These outcomes were independent of the experimental paradigm for the assessment of perceived similarity (pairs-comparison vs. delayed match-to-sample) and of the method of stimulus presentation (point-light stimuli vs. stick figures). Our findings suggest that the visual perception of body motion is veridical and closely reflects physical similarities between joint trajectories. This implies that representations of form and motion share fundamental properties and places constraints on the computational mechanisms that support the recognition of biological motion patterns." @default.
• W2023555797 created "2016-06-24" @default.
• W2023555797 creator A5046338839 @default.
• W2023555797 creator A5049585835 @default.
• W2023555797 creator A5078538935 @default.
• W2023555797 date "2008-07-01" @default.
• W2023555797 modified "2023-09-27" @default.
• W2023555797 title "Metrics of the perception of body movement" @default.
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