ERIC Number: ED029417
Record Type: RIE
Publication Date: 1966
Reference Count: 0
Perceptual Thresholds of Non-Visual Locomotion, Part II.
Cratty, Bryant J.; Williams, Harriet G.
Forty-three blind subjects, aged 17 to 45, were tested for perceptual thresholds of locomotion and received brief mobility training. Psychometric and psychological data obtained indicated that the subjects were above average in IQ (mean 115), emotionally stable, and relatively free from anxiety. Data on locomotion revealed the following: 91% of the subjects veered consistently in the same direction when asked to walk a straight line; and the subjects who walked faster tended to veer less and those who were more accurate in walking in a straight line and in performing 90 degree facing movements were better at position relocation in a field. The threshold to the perception of left-right tilt in pathways walked was slightly under 2 degrees; subjects were more sensitive to walking a downhill gradient than an uphill gradient. On facing movements, the blind and the blind-folded sighted overturned 90 degree turns and underturned 180 and 360 degree turns. Practice modified the veering tendency significantly after 200 feet; the directions a subject habitually veered trying to draw a straight line and to walk a straight line on a field were related (p=.10). Results not reaching statistical significance are also reported. (Author/JD)
Descriptors: Blindness, Emotional Adjustment, Equipment, Etiology, Evaluation, Exceptional Child Research, Individual Characteristics, Intelligence, Kinesthetic Perception, Training, Visual Impairments, Visually Handicapped Mobility
University of California, Department of Physical Education, Los Angeles, Calif. 90014
Publication Type: N/A
Education Level: N/A
Sponsor: National Inst. of Neurological Diseases and Blindness (NIH), Bethesda, MD.
Authoring Institution: California Univ., Los Angeles. Dept. of Physical Education.