In the present investigation, the effects of spatial separation on the interstimulus onset intervals (ISOIs) that produce auditory and visual apparent motion were compared. In Experiment 1, subjects were tested on auditory apparent motion. They listened to 50-msec broadband noise pulses that were presented through two speakers separated by one of six different values between 0°a nd 160°. On each trial, the sounds were temporally separated by 1 of 12 ISOIs from 0 to 500 msec. The subjects were instructed to categorize their perception of the sounds as "single," "simultaneous," "continuous motion," "broken motion," or "succession." They also indicated the proper temporal sequence of each sound pair. In Experiments 2 and 3, subjects were tested on visual apparent motion. Experiment 2 included a range of spatial separations from 6°to 80°; Experiment 3 included separations from .5°to 10°. The same ISOIs were used as in Experiment 1. When the separations were equal, the ISOIs at which auditory apparent motion was perceived were smaller than the values that produced the same experience in vision. Spatial separation affected only visual apparent motion. For separations less than 2°, the ISOIs that produced visual continuous motion were nearly equal to those which produced auditory continuous motion. For larger separations, the ISOIs that produced visual apparent motion increased.Apparent motion is an illusion produced by the proper timing and placement of two discrete stimuli; under optimal conditions, movement of the lead stimulus toward the lag stimulus is perceived. Apparent motion was first demonstrated by Exner in 1875, but it was Wertheimer's (1912) article that initiated much interest in the phenomenon. In 1917, Burtt demonstrated that the illusion of apparent motion could also occur in the auditory and tactual modalities (Burtt, 1917a(Burtt, , 1917b. Most subsequent investigations of apparent motion, however, have been focused on the visual illusion. No direct comparisons between the modalities of apparent motion have been reported. Our purpose in the present investigation was to compare the visual modality of the illusion of apparent motion with the auditory modality. At the same time, we examined the effects of the spatial separation between the stimuli that were used in each modality. Visual Apparent MotionSoon after Wertheimer's seminal paper, Korte published what have been called the "laws" of apparent motion, which describe the relationships between the "primary"This research was supported in part by grants from theNational Science Foundation (BNS-8512317) and the National Institute of Health (3506 RR0801-1452). Carol L. Manligas is now in the Department of Psychology at the University of Georgia, Athens, GA 30602. Correspondence should be addressed to Thomas Z. Strybel, Department of Psychology, California State University, Long Beach, CA 90840. 439variables that affect the visual illusion (Korte, 1915). These variables include the exposure time of each stimulus, as well as the temporal and spatial separ...
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.