Indirect tactual discrimination of heights by blind and blindfolded sighted subjects

Perceptual and Motor Skills
J Sunanto, H Nakata

Abstract

The ability of blind and blindfolded sighted subjects to discriminate cubes of different heights was measured using the method of constant stimuli. Five male blind and 5 male blindfolded sighted students, ages 22 to 28 years, were subjects. All blind subjects had undergone orientation and mobility training at a school for the blind. The cubes, made of wood, were explored using a long cane. Subjects were presented the standard cube and a comparison cube and required to judge whether the comparison cube height was taller, the same, or shorter than the standard. Analysis showed that the difference thresholds of blind and blindfolded sighted subjects were 1.93 and 2.14 cm, respectively. No significant difference in accuracy of discrimination was found between the two groups. The blind subjects showed significantly better performance than the blindfolded sighted subjects on the discrimination task. The blind subjects performed the task significantly faster than the blindfolded sighted subjects. The results suggest that braille reading, use of a long cane, and daily physical activities which required prolonged haptic or proprioceptive learning, may enhance nonvisual motor skills.

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Citations

Aug 1, 2014·Behavioural Brain Research·Tina IachiniFrancesco Ruotolo
Oct 6, 2001·Optometry and Vision Science : Official Publication of the American Academy of Optometry·G P SoongB Brown
Mar 17, 2005·The International Journal of Neuroscience·Roger W Simmons
Feb 15, 2012·Neuroscience and Biobehavioral Reviews·Achille Pasqualotto, Michael J Proulx
Nov 29, 2015·Developmental Science·Giulia CappagliMonica Gori
May 10, 2012·Neuropsychologia·Monica GoriDavid Burr
Feb 4, 2003·Arquivos de neuro-psiquiatria·Elcio Juliato PiovesanGuilberto Minguetti
Feb 3, 2004·Disability and Rehabilitation·Ben SidawayErin Pelletier

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