Recording of Fingertip Position on Tactile Picture by the Visually Impaired and Analysis of Tactile Information

The Effect of Cane Material on Length Perception with Long Canes by Visually Impaired, Sighted-Blindfolded, and Sighted Participants

Journal of Visual Impairment & Blindness ◽

10.1177/0145482x1811200503 ◽

2018 ◽

Vol 112 (5) ◽

pp. 447-459

Author(s):

Márcio Rogério Penha ◽

Ricardo Basso Garcia ◽

Christina Vretos ◽

José Aparecido da Silva

Keyword(s):

Experimental Evidence ◽

Visually Impaired ◽

Standard Stimulus ◽

Visual Impairments ◽

Group Differences ◽

Difference Threshold ◽

Significant Group ◽

Tactile Information ◽

Surface Textures ◽

Length Perception

Introduction Individuals with visual impairments may use long canes for estimating distances and detecting gaps, obstacles, and texture patterns. The study presented here investigated whether length perception with canes is influenced by cane material. Methods Visually impaired, sighted-blindfolded, and sighted individuals (n = 30 for each group) participated in this study. Each group was divided into three subgroups (with 5 females and 5 males each) according to cane material. The canes (length = 80 cm, diameter = 1.5 cm) were made of wood, polyethene plastic, or aluminum. The participants were required to judge whether comparison stimuli were shorter than, equal to, or longer than the standard stimulus. Two sessions (for horizontal or vertical lines) were carried out on consecutive days. Results Cane material was not a significant factor influencing accuracy, F(2, 79) = 2.47, p = .091, and difference threshold, F(2, 79) = 2.01, p = .14, in length perception for the three groups of participants, but cane material interacted with orientation of stimuli, F(2, 79) = 3.24, p = .044. There were significant group differences for accuracy, F(2, 79) = 9.6, p <.001, and difference threshold, F(2, 79) = 8.8, p < .001, revealing that participants with visual impairments were better at discriminating length than sighted-blindfolded participants. Discussion Our results provide evidence that length perception with canes is not significantly influenced by cane material. The significant group differences for accuracy and difference threshold indicate that assessing visually impaired participants may be more adequate in studies aimed at investigating aspects related to long canes. Implications for practitioners Orientation and mobility (O&M) instructors can report that there is experimental evidence that cane material is not a significant factor in conveying spatial (length) information, although some evidence suggests that it is a significant factor in conveying tactile information such as the roughness of surface textures.

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20912 Research on a tactile display for visually impaired person using tactile information from some fingers

The Proceedings of Conference of Kanto Branch ◽

10.1299/jsmekanto.2010.16.309 ◽

2010 ◽

Vol 2010.16 (0) ◽

pp. 309-310

Author(s):

Yasuji MATSUOKA ◽

Naotaka SAKAI ◽

Satoshi SHIMAWAKI ◽

Satoshi MATSUMOTO

Keyword(s):

Visually Impaired ◽

Tactile Display ◽

Tactile Information ◽

Impaired Person

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Sole based tactile information display for visually impaired pedestrian navigation

Proceedings of the 8th ACM International Conference on PErvasive Technologies Related to Assistive Environments - PETRA '15 ◽

10.1145/2769493.2769561 ◽

2015 ◽

Cited By ~ 2

Author(s):

Slim Kammoun ◽

Wahiba Bouhani ◽

Mohamed Jemni

Keyword(s):

Visually Impaired ◽

Tactile Information ◽

Information Display ◽

Pedestrian Navigation

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Articulatory Intervention for the Visually Impaired

Language Speech and Hearing Services in Schools ◽

10.1044/0161-1461.1003.139 ◽

1979 ◽

Vol 10 (3) ◽

pp. 139-144

Author(s):

Cheri L. Florance ◽

Judith O’Keefe

Keyword(s):

High School ◽

High School Students ◽

Behavior Change ◽

Visually Impaired ◽

School Students ◽

Handicapped Children ◽

Paired Stimuli ◽

Visually Handicapped ◽

Parent Program

A modification of the Paired-Stimuli Parent Program (Florance, 1977) was adapted for the treatment of articulatory errors of visually handicapped children. Blind high school students served as clinical aides. A discussion of treatment methodology, and the results of administrating the program to 32 children, including a two-year follow-up evaluation to measure permanence of behavior change, is presented.

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