Reaching measures of monocular distance perception: Forward versus side-to-side head movements and haptic feedback

Emily A. Wickelgren; Daniel S. Mcconnell; Geoffrey R Bingham

doi:10.3758/bf03212088

Reaching measures of monocular distance perception: Forward versus side-to-side head movements and haptic feedback

Perception & Psychophysics ◽

10.3758/bf03212088 ◽

2000 ◽

Vol 62 (5) ◽

pp. 1051-1059 ◽

Cited By ~ 14

Author(s):

Emily A. Wickelgren ◽

Daniel S. Mcconnell ◽

Geoffrey R Bingham

Keyword(s):

Haptic Feedback ◽

Distance Perception ◽

Head Movements

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Monocular Movement Parallax and Near-Space Perception

Perception ◽

10.1068/p020135 ◽

1973 ◽

Vol 2 (2) ◽

pp. 135-146 ◽

Cited By ~ 32

Author(s):

G Johansson

Keyword(s):

Distance Perception ◽

Stimulus Change ◽

Space Perception ◽

Head Movements ◽

Experimental Conditions ◽

Distance Information ◽

Near Space ◽

Movement Parallax ◽

Perceptual Systems ◽

Pattern Transformation

Monocular perception of absolute distances in near space (<2 m) is discussed and studied experimentally. Stimulus change in time and sensory co-action (visual plus kinestethic) are in the theoretical analysis regarded as essential. Therefore movement parallax due to voluntary head movements has been introduced, in the experiments, as a hypothetical main cue, and perspective pattern transformation as a probably important side cue together with accommodation. (In ‘natural’ monocular perception these cues, in combination, are always available in near-space perception.) Under these experimental conditions all subjects exhibited approximately adequate (veridical) distance perception. This positive result, which diverges from the commonly accepted views about absolute-distance information, is tentatively regarded as an effect of the combination of cues and of methodological improvements introduced in the experiments. The result is taken as an indication of the fruitfulness of Gibson's conception of perceptual systems.

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Role of pinnae and head movements in localizing pure tones 1The authors would like to thank Mr. Remi Humbert for implementing the experiment in Turbo Pascal and for his further assistance.

Swiss Journal of Psychology ◽

10.1024//1421-0185.58.3.170 ◽

1999 ◽

Vol 58 (3) ◽

pp. 170-179 ◽

Cited By ~ 4

Author(s):

Barbara S. Muller ◽

Pierre Bovet

Keyword(s):

Sound Source ◽

Head Movement ◽

Movement Analysis ◽

Head Movements ◽

Sound Sources ◽

Localization Accuracy ◽

Sound Effects ◽

Posterior Quadrant ◽

Localization Performance ◽

Pure Tones

Twelve blindfolded subjects localized two different pure tones, randomly played by eight sound sources in the horizontal plane. Either subjects could get information supplied by their pinnae (external ear) and their head movements or not. We found that pinnae, as well as head movements, had a marked influence on auditory localization performance with this type of sound. Effects of pinnae and head movements seemed to be additive; the absence of one or the other factor provoked the same loss of localization accuracy and even much the same error pattern. Head movement analysis showed that subjects turn their face towards the emitting sound source, except for sources exactly in the front or exactly in the rear, which are identified by turning the head to both sides. The head movement amplitude increased smoothly as the sound source moved from the anterior to the posterior quadrant.

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