According to Kagan (1966) conceptual tempo is a cognitive style manifested in a child's consistent tendency to respond slowly, making few errors (reflective style) or rapidly making more errors (impulsive style) on the Matching Familiar Figures test. Kagan (1971) has also stated that while “tempo is not viewed as synonymous with the classic meaning of introversion-extraversion, [but] may share some variance with it.” It was the purpose of this study to test this assumption by giving 52 children aged 8 to 9 yr. and 45 aged 11 to 12 yr. the matching figures and the New Junior Maudsley Inventory (Furneaux & Gibson, 1966).