The stability of subskill scores on the Reading Comprehension Test of the Iowa Tests of Basic Skills was studied. It was concluded that the subskills are of limited use in diagnosing specific strengths or weaknesses in a student's reading comprehension skill development. (Author/GK)

Standardized reading test scores, family socioeconomic status (SES), and teacher-assigned reading groups of pupils in 37 midelementary classrooms from four school districts were examined. Little support was found for the conjecture that pupil or teacher social class plays a major role in elementary school reading grouping. (Author/GK)

This study investigates the relationship between the length of the school year and student achievement on standardized tests. Achievement scores of students from two different school systems were analyzed. Comparisons showed that increasing the length of the school year would not produce marked change in test scored performance. (Author/JAZ)

For many reasons, students do not always perform on tests in ways that are congruent with their true abilities or achievement levels. Problems of this sort may be especially common on Title I evaluations where the tests administered are too difficult for a large percentage of the students. Such considerations raise the questions of whether…

The Cognitive Abilities Test (CAT) provides separate ability estimates organized into three components; verbal, quantitative and non-verbal. There is no composite score. An analysis of scores obtained on the CAT and the Iowa Tests of Basic Skills (ITBS) by a sample student population indicated that discrepancies of twenty points or more among the…

A study examined the effect of geographic mobility on elementary school students' achievement. Although such mobility, which requires students to make multiple moves among schools, can have a negative impact on academic achievement, the hypothesis for the study was that it was not a determining factor in reading achievement test scores. Subjects…

Three studies related to group interpretation of the subskills tested by the Iowa Tests of Basic Skills (ITBS) were the focus of this project. These were the Impact Study, Teachers' Predictions of Student Performance on Subskills of Mathematics, and Relationships between the Results of ITBS. Mathematics Subtests and Stanford Diagnostic Mathematics…

The usefulness of the Iowa Algebra Aptitude Test (IAAT) as a predictor of student achievement in secondary mathematics courses was studied. Subjects were 977 students from 7 Iowa schools in grades 6 through 9. Data collected included their IAAT scores and Iowa Tests of Basic Skills (ITBS) mathematics skills test scores, as well as data about…

This study compared the reliability and validity of two different measures of reading ability, the Degrees of Reading Power (DRP) and the Iowa Tests of Basic Skills (ITBS) Reading test and the ITBS Vocabulary test. The data consisted of scores of 377 grade 5 and grade 6 students on these tests, along with their assigned reading levels in the…