A hypothesized hierarchy of tasks in the development of tactual discrimination (an essential skill for reading) was tested in 60 blind primary level children. For five braille and five Optacon (optical to tactile converter) sequences, Ss were asked to identify the different stimulus from the four presented. Scalogram analysis was used to examine…

The monograph describes the development of verbal behavior over a 20-year period in two deaf Japanese children (5- and 7-years-old when first contacted by the author) with whom previous training attempts had failed. It is noted that prior training methods which had succeeded with Laura Bridgman and Helen Keller failed with these two children. A…

Provided in the second of two articles is further evidence of the validity of the author's sequence of tactual discrimination tasks for partial development of Optacon use readiness in young blind children. (IM)