Psychological Reports, 1990, 66, 503-508.
O Psychological Reports 1990
MEASURES O F CONCURRENT VALIDITY AND ALTERNATE-FORM RELIABILITY O F T H E TEST O F NONVERBAL INTELLIGENCE ' JOHN D. MARTIN, GARLAND E. BLAIR, AND JUDY R. BLEDSOE h f i n Peay Stale UniversiCy
Summary.-The subjects, 60 undergraduate students, were administered the Test of Nonverbal Intelligence (TONI) individually. The Shipley Institute of Living Scale was administered in small groups. A Pearson correlation of .56 was obtained for TONI Quotients, Forms A and B. TONI Quotients, Forms A and B, correlated with Shipley estimated WAIS-R IQ .50 and .46, respectively, and corrected to .71 and .64, with Shipley Total T scores, .52 and .44, respectively (corrected to .71 and .61), with Shipley Abstraction T scores, .51 and .42, respectively (corrected, .63 and .52), and with Shipley Vocabulary T scores .26 and .32, respectively (corrected to .63 and ,521. TONI scores seem more closely related to Shipley Totd and Absuaccion scores than to Shipley Vocabulary.
Brown, Sherbenou, and Johnsen (1982), authors of the Test of Nonverbal Intelligence (TONI), estimated its concurrent validity on the basis of correlations of scores with seven different measures of intelligence and achievement. Those measures included Raven's (1938) Progressive Matrices, Leiter International Performance Scale (Leiter, 1948), Wechsler Intelligence Scale for Children-Revised (Wechsler, 1974), Otis-Lennon Mental Ability Test (Otis & Lennon, 1970), Iowa Test of Basic SkiUs (Lindquist & Hieronymus, 1956), SRA Achievement Series (Naslund, Thorpe, & Lefever, 1978), and the Stanford Achievement Test (Madden & Gardner, 1972). These studies included three with normal subjects, two with deaf subjects, two with learning disabled subjects, and one with mentally retarded subjects. Brown, Sherbenou, and Johnsen (1982) reported that all correlations were high-all exceeded the .35 criterion and 41% exceeded the .80 criterion, suggesting strong evidence for concurrent validity of the test. This was further reinforced by similarity of findings across samples of normal and handicapped subjects. The authors contended that the reliability and validity data of the TONI are encouraging; however, they indicated a need for further research. Bond and Kennon (1982) reported that the scores derived from the TONI and the WISC-R Verbal scale correlated .61 ( p < .01) in a sample of average ability. Scores on the TONI and WISC-R Performance scale correlated .77 (p