Measuring Braille reading speed with the MNREAD test

Braille is an important form of written communication for many visually disabled people. Perceptual factors limiting Braille reading speed are poorly understood, partly because of the lack of accurate, standardized testing methods. In this paper, we describe a new, standardized method for measuring Braille reading speed, adapted from the MNREAD test for print reading speed. The key principles include the use of well-characterized text samples composed of simple vocabulary, presented in a standard spatial layout, with sample length measured as the number of characters. We used the MNREAD test to study Braille reading speed in 44 experienced participants. The median reading speed was 124 words per minute, equivalent to 7.5 characters per sec. When measured in words per minute, Grade 1 reading speed was 71.5% of Grade 2 reading speed. This difference could be accounted for by the difference in the number of characters. This finding argues for the use of characters per sec as an appropriate metric for measuri...

[1]  W. Schiff,et al.  Tactual Perception: A Source Book , 1983 .

[2]  Susanna Millar,et al.  Is There a “Best Hand” for Braille? , 1984, Cortex.

[3]  Gordon E. Legge,et al.  Printed Cards for Measuring Low-vision , 1995 .

[4]  G. Legge,et al.  Psychophysics of reading—I. Normal vision , 1985, Vision Research.

[5]  Ronald P. Carver,et al.  Reading Rate: A Review of Research and Theory , 1990 .

[6]  Gordon E. Legge,et al.  Printed cards for measuring low-vision reading speed , 1995, Vision Research.

[7]  M. Knowlton,et al.  Braille Reading Rates as a Function of Reading Tasks , 1996 .

[8]  Emerson Foulke,et al.  Tactile acuity, aging, and braille reading in long-term blindness , 1996 .

[9]  J. Lorimer,et al.  Experiments with Modified Grade 2 Braille Codes to Determine Their Effect on Reading Speed , 1979 .

[10]  Susanna Millar,et al.  The Perceptual "Window" in Two-Handed Braille: Do the Left and Right Hands Process Text Simultaneously? , 1987, Cortex.

[11]  C. Y. Nolan,et al.  Perceptual Factors in Braille Word Recognition. (American Foundation for the Blind. Research Series No. 20). , 1969 .

[12]  P. Bertelson,et al.  A Study of Braille Reading: 2. Patterns of Hand Activity in One-Handed and Two-Handed Reading , 1985, The Quarterly journal of experimental psychology. A, Human experimental psychology.

[13]  A P Grunwald.  A Braille-Reading Machine , 1966, Science.

[14]  R. Klatzky,et al.  Similarity of Tactual and Visual Picture Recognition with Limited Field of View , 1991, Perception.

[15]  G E Legge,et al.  Psychophysics of reading. XV: Font effects in normal and low vision. , 1996, Investigative ophthalmology & visual science.

[16]  N. O’connor,et al.  Right and Left Handed Reading of Braille , 1971, Nature.

[17]  Carson Y. Nolan,et al.  Perceptual factors in braille word recognition , 1969 .