The Slosson as a predictor of Wide Range Achievement Test performance

This study investigated the efficacy of predicting academic achievement as measured by the Wide Range Achievement Test, using the Slosson Intelligence Test For Children and Adults as the predictor. Ninety-five children referred for psychological evaluations in a five-county area in southeastern Nebraska were given both instruments, and a regression analysis was conducted where the Slosson IQ scores were separately regressed on Reading, Spelling and Arithmetic standard scores from the Wide Range Achievement Test. The results indicated that the Slosson IQ significantly predicts Wide Range standard scores. Derived regression equations are reported.     

A concurrent validity study of the Woodcock Word Comprehension Test

The purpose of this study was to determine the relationship between the Woodcock Word Comprehension Test and several measures of reading achievement and verbal intelligence. Subjects were 194 children who were tested in a University Reading Clinic. All were administered the Woodcock Reading Mastery Tests, the Slosson Oral Reading Test, an Informal Reading Inventory, the Wechsler Intelligence Scale for Children—Revised, the Slosson Intelligence Test, and the Peabody Picture Vocabulary Test. Pearson product-moment correlations (r) were used to test the relationships. It appeared that the Woodcock Word Comprehension Test assesses reading ability more than general verbal ability.     

Selecting gifted children with the Slosson Intelligence Test: 1981 vs. 1961 norms

The Slosson Intelligence Test (SIT) for Children and Adults protocols for 683 gifted students ranging in age from 6 to 12 years were scored using both 1961 and 1981 norms. The average 1981 norm score was 5.17 points lower than the 1961 norm score. The differences increase with the age of the child. Implications for using the SIT for selecting gifted children are discussed.     

A caution against the use of the Slosson Intelligence Test in the diagnosis of mental retardation

The Slosson Intelligence Test, unlike most current measures of intelligence, uses a ratio method of mental age divided by chronological age to obtain an IQ score. Due to this, standard deviations are not stable across age levels and present a problem in diagnosing mental retardation. The Slosson Test Manual provides information whereby an overall test standard deviation of approximately 25 points is obtained. This is reviewed in respect to current criteria for the classification of mental retardation. It is concluded that the Slosson is inappropriate for use in the diagnosis of mental retardation.     

A comparison of three screening tests and the WISC-R in special education evaluations

Eighty public school children referred for psychological assessment for potential special education placement were given the Slosson Intelligence Test, Peabody Picture Vocabulary Test, Developmental Test of Visual-Motor Integration, and Wechsler Intelligence Scale for Children—Revised. Correlational and regression techniques were used to determine the effectiveness of the three former measures in predicting WISC-R IQ scores. SIT IQs were found to be the best predictors of WISC-R Verbal, Performance, and Full Scale IQs; however, these statistical relationships reveal little about the clinical utility of the screening measures. Problems with use of the current findings and those of other studies are discussed.     

Effectiveness of the DISTAR Reading I Program in Developing First Graders’ Language Skills

Abstract

The purpose of this study was to determine if the DISTAR Reading I program was more effective than a basal reading program in increasing school-based language ability. Additionally, I examined the hypothesis that DISTAR develops language more effectively for children who enter school with lower initial language ability than for children with higher language ability, as measured by the Metropolitan Readiness Test. Subjects were 80 Black 1st-grade learners randomly selected from two urban elementary schools. I assessed initial language with the language subtest of the Metropolitan Readiness Test. The adjusted mean score of the DISTAR classes on the posttest of the Slosson Intelligence Test was approximately 9 points higher than the adjusted mean of the basal reader group. Contrary to the second hypothesis, the DISTAR program was equally as effective for students with average or high initial language ability as for students with low initial language ability. The results are discussed as support for the proposition that the use of DISTAR direct-instruction procedures is a successful means of developing school-based language.     

Race differences on the developmental test of Visual Motor Integration,the Slosson Intelligence Test,and the ABC Inventory

Preschoolers' scores on the Developmental Test of Visual Motor Integration (VMI), the Slosson Intelligence Test (SIT), and the ABC Inventory (ABCI) were analyzed for race and sex differences. Separate ANOVAs revealed no race effect on the VMI, whereas race differences favoring whites were found for the SIT and ABCI. There were no effects for sex on any measure, nor were there any interactions. Results are discussed in terms of the inconsistent findings for race effects in the perceptual-motor literature.     

Identification of educationally at-risk children during the kindergarten year: A four-year follow-up study of group test performance

Group test performance of children identified during the kindergarten year as educationally high, moderate, and low risk was investigated by following a group of 472 children from grades one through four. End of kindergarten predictive measures were the Kindergarten Evaluation of Learning Potential, the Bender-Gestalt Test, and the Slosson Intelligence Test; follow-up measures were group achievement tests administered in April of each school year. Significant differences in achievement performance were found between the high and low risk groups. Significant correlations were found between risk group designation and achievement performance in the first four grades. (No significant differences in group test performance were found for risk groups or individuals between grade levels.) Findings support the predictive validity of the present screening procedures for group test performance through grade four. Further, the findings show that students appear to perform consistently at the same level year to year in a regular class instructional program.     

An interpretive profile for the slosson intelligence test

The Slosson Intelligence Test (SIT) is an age scale of intelligence with demonstrated reliability and high validity coefficients correlated to the Stanford-Binet. The items of the SIT were classified according to a scheme resembling Valett's classification of Stanford-Bmet test, items. A comparison of the classifications was made and an explanation given of how the interpretive profile can be used to enhance the value of the SIT.     

Comparison of reading disabled children's scores on the WISC-R,Peabody Picture Vocabulary Test,and Slosson Intelligence Test

Scores on the Slosson Intelligence Test and Peabody Picture Vocabulary Test, two frequently used screening devices, are examined to determine how well they predict scores on the Wechsler Intelligence Scale for Children—Revised. Two hundred seven children representing reading disabled children in the average classroom were administered each of the three measures of this study. The degree of relationship between the PPVT and the WISC-R was found to be.57, and the degree of relationship between the SIT and the WISC-R was found to be.73. The results of this study suggest that the PPVT and SIT measure different and/or limited aspects of a child's ability as measured by the WISC-R and are therefore only rough estimates of capacity to function in situations requiring what is generally termed intelligence.     

Comparison of the SIT with the WISC-R for gifted students

There has been a need to identify a quick screening and reevaluation instrument to determine eligibility status for specialized programs. The Slosson Intelligence Test (SIT) is one instrument that has been suggested for this purpose. In a ten-year review of validity studies with the SIT, Stewart and Jones (1976) found substantial correlations between the SIT and WISC. They recommended that future validity studies with the SIT focus on specific subgroups with restricted IQ ranges. The present study compared the SIT with the WISC-R for a group of intellectually gifted students. The results indicated reduced correlations between the measures. The calculated regression equation was dissimilar to the one reported by Stewart and Jones for nonrestricted IQ populations, although predictive ability was greater. The need for comparing the SIT with other measures for specific subgroups was supported.     

Validation of the Kaufman Assessment Battery for Children with a sample of preschool children

The validity of the Kaufman Assessment Battery for Children (K-ABC) (Kaufman & Kaufman, 1983) was investigated with a sample of preschool-age children. The sample consisted of 50 subjects aged 21/2 through 4 who were distributed roughly equally by age, sex, and race according to the 1980 census. The validity of the K-ABC was examined using the Slosson Intelligence Test (SIT) (Slosson, 1982) and the Classroom Behavior Inventory-Preschool Form (CBI) (Schaefer & Edgerton, 1978) as criterion measures. The SIT and CBI-Preschool Form Verbal Intelligence Scale were found to correlate significantly (p<.01) with the global scales of the K-ABC. The K-ABC did not differentiate between age or sex groups, but blacks scored lower than whites. The findings are supportive of previous validity studies (Kaufman & Kaufman, 1983) and two-factor theories of intelligence (e.g., Das, Kirby, & Jarman, 1975).     

Can short-form WISC-R IQ tests identify children with high full scale IQ?

Forty-seven talented fourth graders were assessed on different WISC-R short-form combinations in order to determine which short-form was the most effective predictor of high Full Scale WISC-R IQ. The short-form combinations of Similarities + Object Assembly + Vocabulary subtests (SI-OA-VO) or Similarities + Object Assembly subtests (SI-OA) were more effective in this regard than eight other WISC-R short-form combinations, the Slosson Intelligence Test, and school grades in Math, Language, and Reading combined. The findings are of relevance to gifted assessment.     

Predictive validity of the Slosson Intelligence Test with the WISC-R and the WRAT-R level 1

Slosson Intelligence Tests (SITS) administered by school guidance counselors correlated significantly with school psychologist administered WISC-Rs (r=.75). The Slosson IQ correlated significantly higher with the WISC-R Verbal IQ than with the Performance IQ score. The mean Slosson IQ was a statistically significant 4.4 points higher than the mean WISC-R Full Scale IQ (p<.01).     

Validity of the Slosson Intelligence Test: A ten-year review

Ten years of validity research concerning the Slosson Intelligence Test (SIT) is reviewed. The equivalence of the SIT to the Stanford-Binet and the Wechsler Scales is examined and the relationship of the SIT to achievement measures is described. The importance of supplementing correlational findings with regression analysis, mean difference data, and information on misclassification is emphasized by the reviewers. Decisions concerning individuals based on SIT IQ scores are viewed as particularly risky in situations involving groups of subjects characterized by a relatively narrow range of IQ scores.     

A comparison of the Slosson intelligence test and the WISC-R with elementary school children

The WISC-R and the Slosson Intelligence Test (SIT) were given to 69 randomly selected children in grades one through six in an urban school system. A regression equation for predicting WISC-R full scale IQ from SIT was developed. Previous studies had reported that SIT IQs tended to be consistently higher than WISC-R IQs. The present study revealed that SIT IQs were considerably higher than WISC-R IQs in the upper range and slightly lower in the lower range. A possible reason for the discrepancy is that the present study used a normal population and previous studies used restricted ranges. It was concluded that the SIT provides a good estimate of WISC-R full scale IQs when a regression equation is used. It was recommended, however, that educational placement decisions should not be made on the basis of any single IQ measure.     

Concurrent validity of the Slosson full‐range intelligence test: Comparison with the Wechsler intelligence scale for children–third edition and the Woodcock Johnson tests of achievement–revised

This study examined the concurrent validity of the Slosson Full‐Range Intelligence Test (S‐FRIT) by comparing S‐FRIT scores to the scores of the Wechsler Intelligence Scale for Children–Third Edition (WISC‐III) and the Woodcock‐Johnson Tests of Achievement–Revised (WJ‐R). Data from 123 elementary students' screening and psychological testing results were examined. Results revealed that the S‐FRIT scores were more related to overall intelligence, verbal, and math abilities than nonverbal intelligence, reading, or written language abilities. Further, it was found that 89% of the participants' S‐FRIT Full‐Range IQ scores fell within one standard deviation of their WISC‐III FSIQ scores, with an average discrepancy of 7.6 points. Discrepancies between S‐FRIT and WISC‐III scores were also examined by educational diagnostic categories and ability levels. Limitations and suggestions for future research are provided. © 2002 John Wiley & Sons, Inc.     

Social-emotional characteristics and special educational needs

The aim of the research described in this article was the development of an instrument to measure social emotional characteristics and special educational and pedagogical needs of students in the last grade of primary education. Questionnaires were developed for teachers as well as for students. Exploratory factor analyses showed that the factors underlying the structure of the teacher questionnaire corresponded for the larger part with the negative poles of four factors of the Big Five, i.e., conscientiousness, agreeableness, extraversion, and emotional stability. A stepwise regression analysis was conducted to examine which factors contribute to the prediction of type of secondary education. Intelligence was the most important predictor; lack of conscientiousness accounted for another nine percent of the variance in level of secondary education.     

WISC-R: The first five years

Since its introduction five years ago (1974), 113 articles or papers have appeared regarding the WISC-R, including empirical investigations of its nature, as well as its comparability with a variety of other measures of intelligence and achievement, including the WISC. While not all this research has been carefully done, two general conclusions can be derived from the review. First, although the WISC-R involves modification in administration, design, and presentation of items, as well as a complete restandardization, the literature substantially suggests that it remains very similar in nature to its predecessor, the WISC. Investigations of factor analytic structures, standard errors, reliability coefficients, and subtest intercorrelations support the conclusion that individuals perform on the WISC-R largely the same as they do on the WISC. The second conclusion points out (with few exceptions): consistently lower scores were obtained on the WISC-R than on several other measures, including the WISC, the WAIS, the Slosson Intelligence Test, the Peabody Picture Vocabulary Test, and the Stanford Binet, which was revised shortly before the WISC. These lower scores on the WISC-R may be due to a variety of influences, including examiner variance, an artifact of design leading to inflated scores on the WISC, and finally and most obviously, the restandardization of the scale. The amount of literature that has appeared over the five-year period suggests that practitioners and researchers are as interested in learning about the WISC-R as they were about the WISC. Despite this fact and the conclusion that the WISC and WISC-R are substantially similar, the present authors encourage caution in the overgeneralization of findings until additional literature develops.     

Comparison of the slosson intelligence test,revised norms,and WISC-R for children with learning problems and for gifted children

The Slosson Intelligence Test (revised norms) (SIT) and the WISC-R were compared in two samples of children. In the first sample, there were 34 black and 27 white rural Southeastern Alabama children being considered for special education classes. In the second sample, there were 4 black and 81 white suburban Alabama children being considered for classes for the talented and gifted. In both samples, correlations between the SIT IQ and WISC-R Full Scale IQ were significant (rs of .70 and .48, respectively). However, in the special education sample, SIT IQs were significantly higher than WISC-R Full Scale IQs by about 7 points. The results from both samples provide a moderate degree of support for the concurrent validity of the revised SIT norms, using the WISC-R as the criterion. However, the IQs on the two tests may not be interchangeable.