The Test of Nonverbal Intelligence-3rd Edition (TONI-3) and the Analogic Reasoning (AR) subscale of the Universal Nonverbal Intelligence Test (UNIT) were administered to 35 individuals with autism to determine whether real-world-knowledge deficits affected intelligence scores. The 2 tests are similar in format; however, the TONI-3 includes only…

Lynn [Lynn, R., 2002. Sex differences on the progressive matrices among 15-16 year olds: some data from South Africa. "Personality and Individual Differences 33," 669-673.] proposed that biologically based developmental sex differences produce different IQ trajectories across childhood and adolescence. To test this theory we analyzed the…

The results of this study support the notion that different parts of Raven's Coloured Progressive Matrices Test tap different processes. Sets A and Ab employ the rationale of the Inhelder-Piaget Test and rely on solution by graphic processes, whereas set B involves solution by opeational means. Total score results may be less appropriate than the…

Children 3.5 to 5.5 years of age who were unable to conserve length with Piaget's classical task did conserve length with parallel nonverbal tasks. Findings suggest that "preoperational" children apparently do not fail to conserve length because of centration, misleading perceptual information, or immature cognitive operations regarding…

Regression analysis revealed that a reliable estimate of the field-analytic disposition could be derived from a composition of scores on the Gottscaldt, Space Relations, Street Gestalt, and Perceptual Acuity tests. (Author)

One hundred elementary- and middle-school students were administered the Universal Nonverbal Intelligence Test (UNIT; B.A. Bracken & R.S. McCallum, 1998) and the Leiter International Performance Scale-Revised (Leiter-R; G.H. Roid & L.J. Miller, 1997). Correlations between UNIT and Leiter-R scores were statistically significant ( p less…

A study examining the relationship between nonverbal intelligence and academic achievement in 53 hearing impaired 7-18 year olds supported using the Hickey-Nebraska Test of Learning Aptitude (along with other measures) in interpreting individual differences in the academic achievement of hearing impaired students. (Author/CL)

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…

The purpose of this study was to compare the effectiveness of the Raven's Standard Progressive Matrices, the Naglieri Nonverbal Abilities Test (NNAT), and the Iowa Test of Basic Skills (ITBS) in selecting for ethnically diverse students who may be gifted. The participants of the study were 175 students enrolled in Grades 3-5 and Grade 8 in a…

Reviews research concerning relationship of nonverbal ability measures recommended for hearing impaired students and learning potential. Reviews both earlier studies indicating that nonverbal measures could be used to predict academic achievement and more recent studies urging caution or suggest questionable predictability when interpreting data.…

Administration of nonverbal IQ tests to 12 children with normal language and 12 with language impairments (ages 8-10) revealed that the children with language impairments had lower scores than controls, and that nonlinguistic deficits of children with language impairments adversely affected their responses to specific types of items on nonverbal…

A study involving 27 elementary children with hearing impairments indicated positive, moderate correlation between the Test of Nonverbal Intelligence, 2nd edition, (TONI-2) IQ, and the Wechsler Intelligence Scale for Children, 3rd edition, Performance IQ that supported concurrent validity. The TONI-2 had predictive value for Stanford Achievement…

In a previous article, we (Naglieri & Ford, 2003) provided evidence from a large-scale study that similar proportions of White, Black, and Hispanic children would be identified as gifted using the Naglieri Nonverbal Ability Test (NNAT; Naglieri, 1997). Lohman (2005) has taken issue with our conclusions and our methods. We provide several…

A lock box for investigating preschool children's problem-solving behavior was used with 17 Down syndrome children and 17 normal children, all of whom had a mean age of 37.4 months. Small children showed greater competence, more organization, and less perseverance than those with Down syndrome. (RH)

This study sought to determine whether there exist performance distinctions between artists and nonartists on specific two- and three-dimensional nonverbal problems. The factorial structure of scores on ten nonverbal ability tests was analyzed to identify mental process differences between the two groups. (Author/SJL)