This article describes a model for response times that is proposed as a supplement to the usual factor-analytic model for responses to graded or more continuous typical-response items. The use of the proposed model together with the factor model provides additional information about the respondent and can potentially increase the accuracy of the…

An ethnically diverse sample of at-risk-for-overweight and overweight youths (body mass index greater than the 85th percentile for age and gender; n = 667 male participants, and n = 684 female participants) completed a school-based survey measuring family variables (connectedness, mealtime environment, and weight commentary), psychosocial…

Policies governing divorce and parenting, such as child support orders and enforcement, child custody regulations, and marital dissolution requirements, can have a large impact on the welfare of parents and children. Recent research has produced evidence on the responses of divorce rates to unilateral divorce laws and child support enforcement. In…

This study identified the likelihood of new, tenure-track assistant professor obtaining tenure at a large multicampus university (the University of Missouri system). Logistic regression was used to determine whether certain faculty characteristics help to explain who received tenure. The tenure rate was based on the percentage of new assistant…

The term differential item functioning (DIF) refers to whether or not the same psychological constructs are measured across different groups. If an item does not measure the same skills or subskills in different populations, it is said to function differentially or to display item bias. A multilevel approach to DIF is proposed. In such a model,…

The serious problems associated with the use of stepwise methods are well documented. Various authors have leveled scathing criticisms against the use of stepwise techniques, yet it is not uncommon to find these methods continually employed in educational and psychological research. The three main problems with stepwise techniques are: (1)…

This paper studied the relationship between faculty diversity and educational quality, academic integrity, and institutional effectiveness. The study sought to determine if there were significant differences among educational leaders on whether regional accreditation should be used to promote faculty diversity, and what variables accounted for any…

In this study, the relationships between simple learning by accretion and various cognitive ability variables were explored. Computerized tests of five sources of individual differences were administered to a sample of 714 Air Force recruits, along with a trigram-English word paired-associate task, which was presented as a foreign language…

Conventional statistical significance tests do not inform the researcher regarding the likelihood that results will replicate. One strategy for evaluating result replication is to use a "bootstrap" resampling of a study's data so that the stability of results across numerous configurations of the subjects can be explored. This paper…

The concept of fuzzy time series is introduced and used to forecast the enrollment of a university. Fuzzy time series, an aspect of fuzzy set theory, forecasts enrollment using a first-order time-invariant model. To evaluate the model, the conventional linear regression technique is applied and the predicted values obtained are compared to the…

The objective of this investigation was to take a small data set that represents unbalanced factorial designs and explain by example how the variance is partitioned when using the various options from the Statistical Package for the Social Sciences (SPSSX) and Statistical Analysis System (SAS). That the unequal cell size analysis of variance…

Two experiments investigated the role of capacity in children's comprehension of relative clause sentences. Sentences varied in number of participant roles, focus (object, subject), and embeddedness (center-embedded, right-branching). Center-embeddedness and object-focus were expected to constrain individuals toward assigning more nouns to their…

The Course Placement Service of the American College Testing Program (ACT) uses logistic regression to model the relationships between outcomes in standard college courses and placement test scores. The logistic regression results are used together with empirical test score data to obtain estimates of validity statistics (e.g., proportion of…

The analysis of small group data with hierarchical linear models is discussed, concentrating on the usefulness and reliability of such analyses using data reported by N. M. Webb (1982). Results of Webb's analyses for 96 junior high school students in small groups are compared with results obtained with random effects linear models for the analysis…

A study examined potential variables that editors might use to lure young readers into a newspaper reading habit. A total of 204 high school students were asked to read and rate one of 20 newspapers (collected from around the country) on enjoyment, readability, and attractiveness. The newspapers' efficiency in transmitting information was also…