A least squares approach to estimating the reliability of a measure consisting of more than three content homogeneous or congeneric parts is proposed. The advantages of this method over a more indirect approach in which certain parts of a measure are combined to use Kristof's or Feldt's coefficients are examined. One hundred four-part tests were…

INVESTIGATION IS CONTINUED INTO VARIOUS EFFECTS OF NON-INDEPENDENT ERROR INTRODUCED INTO MULTIPLE-CHOICE TEST SCORES AS A RESULT OF CHANCE GUESSING SUCCESS. A MODEL IS DEVELOPED IN WHICH THE CONCEPT OF THEORETICAL COMPONENTS OF SCORES IS NOT INTRODUCED AND IN WHICH, THEREFORE, NO ASSUMPTIONS REGARDING ANY RELATIONSHIP BETWEEN SUCH COMPONENTS NEED…

This investigation had two major purposes. The first was to explore the use of an inferential technique called Tukey's Jackknife in establishing a confidence interval about cooefficient alpha reliability. The second purpose was to study the robustness of the Feldt and the jackknife procedures when the data fails to satisfy usual normality…

The efficiency of mastery tests of fixed length which sorts students into two categories is analyzed. For the sort of the students, an index, suggested by Fisher's linear discriminant function for two groups, is provided. (DB)

This study assessed the extent to which students commit various types of errors when completing Holland's Self-Directed Search (SDS) entirely on their own. Nearly all students made some type of error and approximately half of the students made errors that affected their final 3-letter summary codes. Almost one-fifth of the students made errors…

Critical to precise quantitative research is reliability estimation. Researchers have limited tools, however, to assess the reliability of evolving instruments. Consequently, cursory assessment is typical and in-depth evaluation is rare. This paper presents a rationale for and description of PIAS, a computerized instrument analysis system. PIAS…

To test the reliability of four tasks of the Michigan Restricted Association Norms--Superordinates, Parts, Following Words, and Free Associations--30 subjects were asked to respond to 33 stimulus items under each of the four instructions and to perform identical tasks 7-14 days later. Comparisons of the intra-individual reliability and…

It has been the impression of the authors that a significant minority of MMPI profiles produced by adolescents suggest schizophrenia when such a process is not evident clinically. The present study was conducted in order to measure and better understand the frequency of false positive adolescent MMPI profiles. (Author)

Data are presented on the retest and split-half reliability of the Rosenzweig Picture-Frustration (P-F) Study, Children's Form, for two groups of subjects (aged 10-11 and 12-13), each group tested twice at an interval of three months. Reliability by retest was consistently higher than by the split-half method. (Author/CTM)

The reliability of the proposed short form of the Revised Illinois Test of Psycholinguistic Abilities (ITPA) was computed on data derived from six-year-old ITPA standardization test booklets (128 Ss). (Author/CL)

It is shown that if a behavior domain can be described by the common factor model with a finite number of factors, the squared correlation between the sum of a selection of items and the domain total score is actually greater than coefficient alpha. (Author/JKS)

An index for the dependability of mastery tests is described. Assumptions necessary for the index and the mathematical development of the index are provided. (Author/JKS)

Finding and interpreting lower bounds for reliability coefficients for tests with non-homogeneous items has been a problem for psychometricians. A computer search procedure is developed for locating such a lower bound in a variety of settings. (Author/JKS)

The author argues that general intelligence assessment should be abandoned on moral and theoretical grounds, but that the conceptualization, testing, and identification of specific intellectual abilities is both defensible and worthwhile. (MB)

Suggests that A-Trait may have a direct influence on achievement in addition to influencing it through A-State. Results confirmed expectations that A-Trait is relatively stable over time and that A-State is less stable. (Author/DEP)