Temporal Factors for Vibrotactile Letter Reading

1995 ◽  
Vol 80 (3_suppl) ◽  
pp. 1069-1070 ◽  
Author(s):  
Yutaka Shimizu
Keyword(s):  
Apparent Motion ◽  
Apparent Movement ◽  
Temporal Parameters ◽  
Temporal Factors ◽  
Motion Mode

Using an apparent-motion mode, the psychophysical effect of apparent movement was introduced for tactile letter reading. This mode reduces time for the tracing mode. Five temporal parameters were examined for application to actual communication. 4 subjects recognized words composed of 3 to 7 Japanese letters in about 5 seconds.

scholarly journals Classification of apparent motion percepts based on temporal factors

2008 ◽  
Vol 8 (4) ◽  
pp. 31 ◽  
Author(s):  
Vebjørn Ekroll ◽  
Franz Faul ◽  
Jürgen Golz
Keyword(s):  
Apparent Motion ◽  
Temporal Factors

Apparent Motion in Geometric Depth

1965 ◽  
Vol 7 (3) ◽  
pp. 215-218 ◽  
Author(s):  
R. E. Wienke ◽  
W. C. Steedman
Keyword(s):  
Point Source ◽  
Light Source ◽  
Apparent Motion ◽  
Visual Angle ◽  
Apparent Movement ◽  
Guidance System ◽  
Visual Guidance ◽  
Point Light Source ◽  
Point Light

The ability to detect small excursions of apparent movement of a point light source was investigated. Apparent movement was achieved by alternately presenting a point source in two different planes. The presentations, each lasting about 500 milliseconds, had an overlap of approximately 8 milliseconds. Using 7 subjects, the limen for apparent motion was a stimulus separation of 43.9 mm, which is a visual angle of 1′ 21″. Possible application of the effect in a highly precise visual guidance system is discussed in light of the results.

Spatio-temporal parameters and the three-dimensionality of apparent motion: Evidence for two types of processing

1987 ◽  
Vol 2 (4) ◽  
pp. 263-272 ◽  
Author(s):  
Zenon W. Pylyshyn ◽  
Richard D. Wright ◽  
Michael R.W. Dawson
Keyword(s):  
Apparent Motion ◽  
Temporal Parameters ◽  
Spatio Temporal

scholarly journals Illusory Continuous Motion from Oscillating Positive-Negative Patterns: Implications for Motion Perception

Perception ◽  
1986 ◽  
Vol 15 (5) ◽  
pp. 627-640 ◽  
Author(s):  
Stuart M Anstis ◽  
Brian J Rogers
Keyword(s):  
Motion Perception ◽  
Relative Motion ◽  
Apparent Motion ◽  
Apparent Movement ◽  
Neural Mechanisms ◽  
Black And White ◽  
Real Movement ◽  
Grating Pattern ◽  
The Right ◽  
Positive Pattern

A black and white (positive) grating pattern was superimposed in exact register on its own photographic negative. Four operations were repetitively applied to this positive pattern so that it moved fractionally to the right, grew dimmer, moved back to the left, and grew brighter again. This sequence produced a strong illusion of continuous apparent motion to the right for as long as the cycle was repeated. The small relative motion between the two patterns generated two new illusory effects: enhanced real movement (ERM) and reversed real movement (RRM). The dimming and brightening phases gave rise to reversed apparent movement (RAM). All three effects are attributed to spatial filtering by neural mechanisms, which shifts the effective position of the positive-negative contours.

scholarly journals Comparison of gait using a Multiflex foot versus a Quantum foot in knee disarticulation amputees

1993 ◽  
Vol 17 (2) ◽  
pp. 90-94 ◽  
Author(s):  
A. M. Boonstra ◽  
V. Fidler ◽  
G. M. A. Spits ◽  
P. Tuil ◽  
A. L. Hof
Keyword(s):  
Gait Analysis ◽  
Range Of Motion ◽  
Frontal Plane ◽  
Gait Patterns ◽  
Subjective Responses ◽  
Temporal Parameters ◽  
Gait Parameters ◽  
Hip Range Of Motion ◽  
Temporal Factors ◽  
Knee Disarticulation

The subjective responses and gait patterns of unilateral knee disarticulation amputees wearing prostheses fitted first with the Multiflex foot and then with the Quantum foot were studied. Nine amputees were included in the trial. A questionnaire asked the amputees about their preference for one of the feet. Gait analysis was performed measuring temporal parameters and goniometry of hips, knees and ankles in the sagittal and frontal planes. There was a slight preference for the Quantum foot. Preference seemed not to be related to physical characteristics of the amputees nor to gait parameters. There were no differences in gait as far as the temporal factors were concerned. The main differences in the range of motion of the joints were in the frontal plane: the eversion-inversion movement of the ankle and the adduction-abduction movement of the hip. During walking at comfortable speed with the Multiflex foot the ankle and hip range of motion averaged 2.1 and 3.1 degrees respectively, less than during walking with the Quantum foot.

Stroboscopic Motion in Depth

Perception ◽  
1982 ◽  
Vol 11 (6) ◽  
pp. 733-741 ◽  
Author(s):  
David Finlay
Keyword(s):  
Apparent Motion ◽  
Frontal Plane ◽  
Apparent Movement ◽  
Binocular Viewing ◽  
Monocular Viewing ◽  
Motion In Depth

Temporal limits of stroboscopic apparent motion in depth have been examined. For monocular viewing the limits are similar to those obtained for motion in the frontal plane, while those for binocular viewing are greatly narrowed. In another experiment the contraction in space over which apparent movement occurs was measured. The results are discussed in terms of a filter representation proposed by Caelli and Finlay.

Information for the Spatial Factor in Korte's 3rd Law of Apparent Motion

1981 ◽  
Vol 53 (2) ◽  
pp. 427-434 ◽  
Author(s):  
Alan M. Hartman
Keyword(s):  
Apparent Motion ◽  
Apparent Movement ◽  
Higher Order ◽  
Space Time ◽  
Invariance Equation ◽  
Spatial Factor ◽  
Single Interval ◽  
Time Invariance ◽  
Interstimulus Intervals

The experiments reported here show that Korte's space-time invariance equation governing perception of apparent motion is limited to situations in which metric or apparent separation of targets define but a single interval of space. Variation in interstimulus intervals and metric separation of targets did not influence the perception of apparent motion when the background array was structured to depict apparently equal intervals of space. These results provide a test of Koffka's and more recently Gibson's view that higher order properties of intervals of space specify the spatial factor in apparent movement.

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