Trajectory forms as a source of information about events

Perception & Psychophysics
M M Muchisky, G P Bingham

Abstract

The ability to use trajectory forms as visual information about events was tested. A trajectory form is defined as the variation in velocity along a path of motion. In Experiment 1, we tested the ability to detect trajectory form differences between simulations of a freely swinging pendulum and a hand-moved pendulum. The trajectory form of the freely swinging pendulum was symmetric around the mid-point, whereas the hand moved was not. In Experiment 2, we isolated trajectory form information by varying the amplitudes of events while holding their periods constant. Straight path versions of the harmonic events from Experiment 1 were tested. In Experiment 3, we tested sensitivity to symmetrical peakening or flattening of trajectory forms. Participants detected small differences in all three experiments. In Experiment 4, we tested the ability to identify specific events based only on differences in trajectory forms. Participants were able to identify four different events. We investigated properties of trajectory forms that might potentially be detected and used as information, and we found that the curvature yielded good results.

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Citations

Mar 29, 2014·PloS One·Barbara La ScaleiaPaolo Viviani
Aug 18, 2004·Perception & Psychophysics·Emily A Wickelgren, Geoffrey P Bingham
Sep 25, 2002·Perception & Psychophysics·Charles R Twardy, Geoffrey P Bingham
Oct 18, 2008·Perception & Psychophysics·Raoul HuysA Mark Williams
Aug 22, 2014·Experimental Brain Research·Antonija MijatovićMyrka Zago
Apr 5, 2012·Evidence-based Complementary and Alternative Medicine : ECAM·Zhang-Jin ZhangGrainne M McAlonan
Sep 4, 2012·Human Movement Science·Steven L FischerTim McGarry
Feb 25, 2015·Frontiers in Human Neuroscience·Travis J WiltshireStephen M Fiore
Nov 2, 2006·Perception·Christel Bidet-IldeiMarina Pavlova

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