The contribution of response in mental measurement.

Is speed of processing information related to intelligence and achievement?

“…The resulting IQ score, therefore, depends on the speed with which the information is processed as well as the accuracy of the response. In fact, when time scores have been added to the number right scores on Raven's Progressive Matrices, correlations with other intelligence tests have been found to increase (Tonn, 1964;Wolf & Stroud, 1961). Hunt, Lunneborg, and Lewis (1975) also point out that "although a verbal intelligence test is directly a measure of what people know, it is indirectly a way of identifying people who can code and manipulate verbal stimuli rapidly in situations in which knowledge per se is not a major factor" (p. 223).…”