Limiting Answer Review and Change on Computerized Adaptive Vocabulary Tests: Psychometric and Attitudinal Results

Previous simulation studies of computerized adaptive tests (CATs) have revealed that the validity and precision of proficiency estimates can be maintained when review opportunities are limited to items within successive blocks. Our purpose in this study was to evaluate the effectiveness of CATs with such restricted review options in a live testing setting. Vocabulary CATs were compared under four conditions: (a) no item review allowed, (b) review allowed only within successive 5-item blocks, (c) review allowed only within successive lO-item blocks, and (d) review allowed only after answering all 40 items. Results revealed no trust-worthy differences among conditions in vocabulary proficiency estimates, measurement error, or testing time. Within each review condition, ability estimates and number correct scores increased slightly after review, more answers were changed from wrong to right than from right to wrong, most examinees who changed answers improved proficiency estimates by doing so, and nearly all examinees indicated that they had an adequate opportunity to review their previous answers. These results suggest that restricting review opportunities on CATs may provide a viable way to satisfy examinee desires, maintain validity and measurement precision, and keep testing time at acceptable levels.     

Preference between fixed-interval and variable-interval schedules of reinforcement: Separate roles of temporal scaling and predictability

Pigeons’ preference between fixed-interval and variable-interval schedules was examined using a concurrent-chains procedure. Responses to two concurrently available keys in the initial links of the concurrent chains occasionally produced terminal links where further responses were reinforced under either a fixed- or variable-interval schedule. In previous studies, preferences for the variable schedule with such a procedure have been interpreted as reflecting atemporal scaling process that heavily weights the shorter intervals in the variable schedule. The present experiment examined whetherpredictability, i.e., the presence of external stimuli correlated with the reinforcement interval, might also influence preference in such situations. When the two intervals in a variable schedule were made predictable by being associated with different key colors, preference for that schedule increased. This increase was reliable but small in magnitude and transient when initial-link responses only occasionally produced terminal links; it was large in magnitude when only one response in the initial link was required to produce the appropriate terminal-link schedule. The results suggest that preference between fixed and variable schedules may be influenced both by temporal scaling and to a lesser extent by predictability of the reinforcement intervals.     

Learner control of context and instructional support in learning elementary school mathematics

Learner-control strategies for selecting problem context and the level of instructional support were examined separately and in combination on a computer-based mathematics unit on the metric system. Subjects were 240 sixth-grade students assigned to 15 treatments formed by crossing five context conditions (animals, sports, clothing, nocontext, and learner control) with three instructional support conditions (minimum, maximum, and learner control). As hypothesized, comparisons of instructional support conditions on posttest achievement showed performance to be lowest under learner control. Subjects opted to view very few items and to decrease the amount they selected over the course of the instruction. No effects were associated with the context variable, although on one of the three lessons, learner-control subjects made significantly fewer on-task errors than did no-context subjects. Further analyses showed a strong tendency by learner-control context subjects to vary their selection of contexts across lessons. Subjects in the context and instructional support learner-control strategies indicated positive attitudes toward the strategies.     

Changing the Attitudes That Predict Underage Drinking in College Students: A Program Evaluation

Several attitudes that predicted binge drinking on campus were identified by focus groups. A brief classroom intervention led to self‐reported attitude change among university students. This type of intervention may be useful to college counselors interested in redefining normative perceptions of alcohol use to decrease the prevalence of binge drinking.     

Black students in U.S. higher education: Toward improved access,adjustment, and achievement

This paper seeks to broaden our knowledge and understanding of black student experiences in U.S. higher education over the past 20 years. Toward this end, I analyze black student enrollment/earned degree trends in the state of Michigan during the 1965–80 period; examine the institutional experiences of black students who enrolled as freshmen at the University of Michigan between 1975 and 1983; and assess the correlates of access, adjustment, and achievement of 700 black college students who attended six predominantly white public institutions in 1981. The analyses out across four different levels of U.S. higher education (national, state, institutional, and individual) and shed considerable light not only on black student experiences but also those of other minority and white students as well. Based on the result of the multidimensional analyses, I set forth an agenda for action to improve the status of blacks in higher education.     

The Effects of Reality Therapy Classroom Meetings on Self‐Concept and Locus of Control among Learning Disabled Children

The purpose of this study was to determine the effects of Reality Therapy‐based classroom meetings on the self‐concept and perception of locus of control orientation of learning disabled children. Sixty (60) learning disabled (LD) children from four classrooms were randomly assigned to experimental and control conditions. Experimental group teachers were trained by a certified Reality Therapist in the concepts of Reality Therapy and how to conduct the classroom meetings. Meetings were held twice weekly for 11 consecutive weeks, each session lasting approximately 30‐45 minutes. Multivariate analysis of variance (MANOVA) yielded no significant differences on the pre‐test self‐concept and locus of control measures. MANOVA on post‐test measures revealed significant differences between the experimental and control groups. Post Hoc univariate F and discriminant analysis indicated several measures of self‐concept to be valid discriminators. The locus of control measure, on the other hand, did not prove to be a valid discriminator. The intervention studied appears to be beneficial in improving some areas of self‐concept among the LD population.     

A theoretical framework for studying educational media: A pilot study

Are different media equally effective for a given learning task when each presents the same event of instruction? Are given instructional materials equally effective for different types of learning outcomes? This pilot study used three types of stimulus materials—text, film, and live demonstration—to teach cardiopulmonary resuscitation to graduate students. Learning outcomes measured were verbal learning and a motor skill task.