3.2 Physical Factors. Many studies indicated that students
having reading problems had some sort of visual difficulty. For example,
Robinson (1946) indicated that 63.6 percent of the students she studied
had some sort of visual difficulties. Moreover, she found that some of her
cases had auditory difficulties. Studies such as those of Shearer (1968)
and Capobianco (1967) are in general agreement with the findings of
Cohen and Glass (1968), who studied 120 subjects in the first and fourth
grades. Half of their samples were defined as “good” readers and half
were defined as “poor” readers. The study showed that good readers
were more likely to be “normal,” and poor readers were more likely to be
confused in their knowledge of left and right.