A new model is presented that explains reaction time fluctuations in prolonged work tasks. The model extends the so-called Poisson-Erlang model and accounts for long-term trend effects in the reaction time curve. The model is consistent with Spearman's hypothesis that inhibition increases during work and decreases during rest. (TJH)

Describes results of a survey conducted at Indiana State University libraries that studied patron perceptions and demographics related to keyword searching on LUIS, the online public access catalog (OPAC) available through NOTIS (Northwestern Online Total Integrated System.) Demographics studied include age, status, frequency of LUIS use, and…

Analyzes effect sizes in tails of distribution of scores in Feingold's study of joint effects of gender differences in mean and variability on 28 cognitive-ability scales. Effect sizes are smaller than Feingold assumed. Evaluates joint effect of gender differences by number of males and females in extreme score ranges. (SLD)

Little is known about demographic, deafness-related, and diagnostic characteristics of deaf and partially hearing people with psychosocial or psychiatric problems. A study was conducted derived from data from intake assessment interviews of people with hearing loss treated at a Dutch ambulatory mental health center for the deaf between 1987 and…

Kids Count, a project of the Annie E. Casey Foundation, is a national and state by- state effort to track the status of children in the United States. By providing policymakers and citizens with benchmarks of child well-being, Kids Count seeks to enrich local, state, and national discussions concerning ways to secure better futures for all…

This study assessed farmers' willingness to pay (WTP) for extension services. The Contingent Valuation Method (CVM) was used to assess the amount which farmers are willing to pay. Primary data on the demographic, socio-economic variables of farmers and their WTP were collected from 228 farmers selected randomly in a stage-wise sampling procedure…

The research project presented in this article was set in the Swedish school context and carried out on a set of compulsory national tests for English, Swedish, and mathematics used at the end of compulsory school. The aims were: (a) to gain a deeper knowledge of the internal structure of the tests and (b) to separate individual performance from…

In this article, the author documents the learning disadvantage of rural primary school students in sub-Saharan Africa and attempts to identify the factors underlying such disadvantages. Analyzing data from 14 school systems participating in the second study of the Southern and Western Africa Consortium for Monitoring Educational Quality (SACMEQ…

Advances in computer technology are making it possible for educational researchers to use simpler statistical methods to address a wide range of questions with smaller data sets and fewer, and less restrictive, assumptions. This digest introduces computationally intensive statistics, collectively called resampling techniques. Resampling is a…

Tables for testing clinical hypotheses about counseling clients are presented, and their use is described. Primary uses are determining a critical value or cutoff score on a predictor that can be used to classify an individual as a member of a clinical group, and instructing those unfamiliar with the limitations of tests about the conditions under…

Standards, passing scores, or cut scores have been seen as an element of criterion-referenced tests since their introduction. This paper discusses at least two issues surrounding the establishment of cut scores which appear to need clarification: (1) the theoretical definition of a cut score; and (2) decisions which must be made in selecting a…

The sampling errors of maximum likelihood estimates of item-response theory parameters are studied in the case where both people and item parameters are estimated simultaneously. A check on the validity of the standard error formulas is carried out. The effect of varying sample size, test length, and the shape of the ability distribution is…

This report provides statistics on employment, evaluation, and training practices and procedures of American public school substitute teachers. A questionnaire was mailed to the directors of substitute teachers in 401 randomly selected school districts. Usable information was returned by 259 school systems (64.6 percent) in 49 states and the…

Based on the assumption that librarians can benefit from a better knowledge and understanding of information needs and behavior, this paper presents a review of the literature on information needs and information seeking behavior from 1971 to 1986, a report on a survey of 100 graduate students enrolled in a course on educational research at…

The combined field tests for the third follow-up survey of High School and Beyond (HSB) and the fifth follow-up survey of the National Longitudinal Study of the High School Class of 1972 (NLS-72) were conducted during the spring of 1985. The overall purposes of the field tests were to evaluate questionnaires and procedures to be used for the…