Twenty-one educable mentally retarded subjects were administered the Revised ITPA twice, employing three month intervals. Six criterion instruments were also administered to explore concurrent validity. It was determined that the ITPA is a fairly stable instrument. Validity of the subtests examined was neither confirmed nor disproven. (Author)

A two-stage testing procedure, a routing test followed by one of several alternative second-stage tests, is studied in the situation where the purpose is measurement, not classification. Models are developed, examined, and compared with conventional tests and up-and-down procedures. (DG)

In testing the Academic Achievement scale, no relationship was found to persistence or between entering first-year Academic Achievement scale scores and 4-year grade point average. Comparisons with a scholastic ability test were unfavorable, other results ambiguous, and caution seems indicated in using the scale. (Author)

Directions are provided for the construction of a reduced size Rod and Frame Test. Simpler and less expensive, the proposed apparatus has criterion validity parallel to that of the full-sized. (GS)

A derivation of a formula for the stability coefficient is presented and discussed in terms of test reliability over time. (PR)

Current tests used to measure the ability of M. D. candidates are as valid as can be expected. It is planned to improve the reliability of these tests by better selection and orientation of examiners. (CK)

Describes reaction to an independent auditor's report that achievement gains made by students under a performance contract were invalid because the private firm responsible for the teaching was guilty of teaching to the test". (JF)