Abstract:

Explored the factor structure of 14 elementary cognitive tasks as well as their relationships with processing speed (Gs) and fluid intelligence (Gf). A total of 321 US Air Force recruits (mean age 20 years) completed four tasks based on the Hick paradigm, four substitution tasks, three switching measures, and three odd-man-out measures assessing elementary cognitive abilities. In addition, three tasks measured Gs and six assessed Gf. Exploratory factor analyses suggested the presence of four task class factors with the possibility of a higher-order general mental-speed factor. Confirmatory factor analyses supported the higher-order model. This mental-speed factor correlated almost perfectly with the Gs factor, and also showed a high correlation with the Gf factor. A final measurement model containing both mental speed and Gf as well as the task class factors showed an acceptable fit. The results are considered evidence for a multidimensional conception of cognitive speed that includes a higher-order factor.