Adaptation in distance perception with head-movement parallax serving as the veridical cue

The possible value of monocular motion parallax for improving distance perception underwater was investigated. Submerged Ss either kept their heads stationary or rotated their heads about a vertical axis while judging the distance of objects placed 4 to 15 ft. away. Both before and after training with feedback to increase accuracy of judgment, head movement did not significantly improve performance. Water turbidity and loss of position constancy are two probable reasons for the failure to replicate the positive results previously obtained in air.

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Absolute distance perception during in-depth head movement: calibrating optic flow with extra-retinal information

Vision Research ◽

10.1016/s0042-6989(02)00120-7 ◽

2002 ◽

Vol 42 (16) ◽

pp. 1991-2003 ◽

Cited By ~ 14

Author(s):

Chin-Hwee Peh ◽

Francesco Panerai ◽

Jacques Droulez ◽

Valérie Cornilleau-Pérès ◽

Loong-Fah Cheong

Keyword(s):

Optic Flow ◽

Head Movement ◽

Distance Perception ◽

Absolute Distance ◽

Retinal Information

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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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Attack Behaviour and Distance Perception in the Australian Bulldog Ant Myrmecia Nigriceps

Journal of Experimental Biology ◽

10.1242/jeb.119.1.115 ◽

1985 ◽

Vol 119 (1) ◽

pp. 115-131 ◽

Cited By ~ 2

Author(s):

E. Sture Eriksson

Keyword(s):

Binocular Disparity ◽

Distance Perception ◽

Zero Point ◽

Effective Range ◽

Moving Targets ◽

Freely Moving ◽

Movement Parallax ◽

Extract Information

The behaviour of the Australian bulldog ant Myrmecia nigriceps (Fr. Smith) has been studied by using moving targets characterized by sizedistance equivalence in relation to a stationary zero-point. The attack behaviour of freely moving animals demonstrated that the ants can discriminate between different targets, in the range of 5–80 cm, using movement parallax to extract information about the targets. By studying the antenna response it was possible to demonstrate that the stationary bulldog ant can utilize binocular disparity information and that this mechanism has an effective range of about 90 mm.

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Movement Parallax and Distance Perception in the Grasshopper (Phaulacridium Vittatum (Sjöstedt)): Short Communications

Journal of Experimental Biology ◽

10.1242/jeb.86.1.337 ◽

1980 ◽

Vol 86 (1) ◽

pp. 337-340

Author(s):

E. S. ERIKSSON

Keyword(s):

Distance Perception ◽

Movement Parallax

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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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