Intelligence has been extensively explored across various disciplines such as psychology, cognitive science, and neurology. Countless scholars have delved into understanding why certain individuals exhibit higher mental acuity and knowledge. Consequently, numerous studies aim to unveil the essence of intelligence and gauge human cognitive…

The Naglieri Nonverbal Ability Test (NNAT) was developed to more equitably identify students of color, as it advertises itself as a culture-fair measure. In this meta-analytic evaluation, we aimed to investigate: (1) the generalizability of validity evidence of NNAT by checking its construct and criterion validity with other measures (Part I); and…

In this study, we examined the factor structure, reliability, and external validity of scores from the Comprehensive Test of Nonverbal Intelligence-Second Edition (CTONI-2) using an independent sample of young adults currently enrolled in a postsecondary institution. Although the subtests appear to be measuring general intelligence, the aggregate…

To study the concept of national IQ profile, we compared U.S. and Finnish WAIS, WAIS-R, and WAIS III nonverbal and working memory subtest norms. The U.S. standardization samples had consistently higher scores on the Coding and Digit span subtests, while the Finnish samples had higher scores on the Block design subtest. No stable cross-national…

This article reviews Test of Nonverbal Intelligence-Fourth Edition (TONI-4), an individually administered instrument created to assess intelligence. The distinguishing characteristic of the TONI-4 is the nonverbal, motor-reduced format that assesses common elements of intelligence without the confounding effects of motor or linguistic skills. The…

This study assessed trait validity of the Reynolds Intellectual Assessment Scales' (RIAS) Verbal Index (VIX) and Nonverbal Index (NIX) scores in a group of college students. Using both observation of patterns and latent variable modeling of a multitrait-multimethod correlation/covariance matrix, the results indicate that the RIAS VIX scores…

Noting the lack of research comparing the Test of Nonverbal Intelligence (TONI) with other measures of intelligence, a study was conducted to ascertain concurrent validity. The TONI was compared to the Slosson Intelligence Test for Children and Adults (SIT) and the Wechsler Intelligence Scale for Children--Revised (WISC-R). Subjects, 43 males and…

Administered the Peabody Picture Vocabulary Test-Revised, Peabody Picture Vocabulary Test, and Wechsler Adult Intelligence Scale-Revised to mildly retarded adults (N=21). Results indicated that the revised Peabody tended to yield significantly lower estimates of functioning than did the other measures. (Author/LLL)

This study examined patterns of nonverbal intelligence test performance of 11 preschool children with and 12 without specific language impairments. The study found group differences in relations among nonverbal cognitive skills. Results suggest caution in using nonverbal intelligence tests normed on nondisabled children with children having…

Past validity research involving the Leiter International Performance Scale and the Arthur Adaptation of the Leiter International Performance Scale is reviewed, particularly as it relates to evaluating intelligence of hearing impaired children. (Author)

The Universal Nonverbal Intelligence Test (UNIT) is reviewed and critiqued. The UNIT is a completely nonverbal test that can be administered as a screening battery, a standard battery for special education eligibility decisions, or as an extended battery for diagnostic purposes. Implications for school psychology practice and research are…

Results of the Test of Nonverbal Intelligence (TONI), Wechsler Intelligence Scale for Children-Revised (WISC-R), and Wide Range Achievement Test were compared for 66 learning disabled children in grades one through six. The TONI mean score was found to be significantly different from the WISC-R Performance Intelligence Quotient (IQ). Implications…

To study the applicability of the Kaufman Assessment Battery for Children (K-ABC) for assessing hearing-impaired children, nine hearing-impaired children (ranging in age from 6 years 4 months to 11 years 10 months) were administered the battery. Hearing losses for the nine children ranged from moderate to profound. During the evaluation of seven…

Scores from 94 psychiatric and neurological patients on the 11 subtests of the Wechsler Adult Intelligence Scale and the Halstead-Reitan Category and Finger Tapping tests were used in a factor analysis. The Category Test is not particularly sensitive to all types of brain pathology. (Author)

Fifty hearing-impaired elementary-school students completed the Kaufman-Assessment Battery for Children; scores correlated highly with scores from the Wechsler Intelligence Scale for Children-Revised and with school achievement. The Simultaneous Processing Scale and the Nonverbal Scale seemed appropriate for hearing-impaired children while the…