A formula is presented for the standard error of estimate of Deviation Quotients (DQs). The formula is shown to perform well when used with data on short forms of two of Wechsler's scales. (Author/JAC)

Examined the standard error for short forms of Wechsler's scales with deviant subjects (N=2000). Demonstrated that the standard error of estimate of a short form for the standardization sample is an excellent approximation to the standard error of a predicted IQ for a new, even markedly deviant, subject. (LLL)

Sees soft data, measures having substantial intrasubject variability due to errors of measurement or response inconsistency, as important measures of response in randomized clinical trials. Shows that using intensive design and slope of response on time as outcome measure maximizes sample retention and decreases within-group variability, thus…

Presents a brief life history of William Sealy Gosset, the "Student" of Student's t-test. Reviews some basic statistics and describes Student's t-test of statistical hypothesis. Contains 11 references. (JRH)

The recent development of multilevel IRT models (Fox & Glas, 2001, 2003) has been shown to be very useful for analyzing relationships between observed variables on different levels containing measurement error. Model parameter estimates and their standard deviations are concurrently estimated taking account of measurement error in observed…

Discusses the significance of confidence intervals around IQ scores based on a misleading interpretation of the standard error of measurement terms provided in the Wechsler Adult Intelligence Scale-Revised (WAIS-R) manual. Presents standard error values and a table for determining the abnormality of verbal and performance IQ discrepancies.…

Examines various procedures for constructing confidence intervals that have been suggested in measurement texts in relation to their approximation to the most accurate procedure that uses the estimated true score as the center of the confidence interval and the standard error of estimate to determine width. (Author/ABL)

Offers standard errors of prediction and confidence intervals for Vineland Adaptive Behavior Scales (VABS) that help in deciding whether variation in obtained scores of scale administered to the same person more than once is a result of measurement error or whether it reflects actual change in examinee's functional level. Presented values were…

A model which gives maximum likelihood estimates of measurement error within the context of a simplex model for practice effects is presented. The appropriateness of the model is tested for five traits, and error estimates are compared to the classical formula estimates. (Author/JKS)