The interaction of conditioned taste aversions and schedule-induced polydipsia: Availability of alternative behaviors

Animals poisoned following exposure to saccharin subsequently avoided the schedule-induced consumption of saccharin. While this suppression was transient for subjects who had access only to the saccharin solution during the free-food presentations, recovery of schedule-induced saccharin consumption was significantly retarded for subjects who had concurrent access to saccharin and a running wheel. It has been suggested that the transient suppression of schedule-induced polydipsia by conditioned taste aversions results from the pellet-induced tendency to drink within the schedule-induced polydipsia procedure. That access to the running wheel reduces schedule-induced polydipsia in general and prolongs the suppression of schedule-induced polydipsia by taste aversions supports this view.     

Behavioral momentum in academics: Using embedded high‐p sequences to increase academic productivity

The use of high‐probability (high‐p) request sequences has enjoyed support in the applied behavioral literature as a method to increase compliance. Based on the theory of behavioral momentum, high‐probability sequences increase the rate of responding, and subsequent rate of reinforcement, within a response class. This increase in density of reinforcement results in increased responding for the response class as a whole. Early research in this area had focused mainly on compliance issues for individuals with developmental disabilities. However, more recently the utility of high‐p sequences has been examined within the context of academics. The purpose of these two experiments was to examine the use of high‐p sequences with two academic tasks—letter‐writing and mathematics problem completion. The results of these studies suggest that high‐p sequences can be used to increase academic productivity. Moreover, the addition of experimenter‐delivered reinforcers to existing high‐p sequences enhances overall behavioral persistence. Theoretical and applied implications of persistence and behavioral momentum are discussed. © 2004 Wiley Periodicals, Inc. Psychol Schs 41: 789–801, 2004.     

Trends in computer applications in science assessment

Seven computer applications to science assessment are reviewed. Conventional test administration includes record keeping, grading, and managing test banks. Multiple-choice testing involves forced selection of an answer from a menu, whereas constructed-response testing involves options for students to present their answers within a set standard deviation. Adaptive testing attempts to individualize the test to minimize the number of items and time needed to assess a student's knowledge. Figurai response testing assesses science proficiency in pictorial or graphic mode and requires the student to construct a mental image rather than selecting a response from a multiple choice menu. Simulations have been found useful for performance assessment on a large-scale basis in part because they make it possible to independently specify different aspects of a real experiment. An emerging approach to performance assessment is solution pathway analysis, which permits the analysis of the steps a student takes in solving a problem. Virtually all computer-based testing systems improve the quality and efficiency of record keeping and data analysis.     

Instruction and science learning: A quantitative synthesis

The purpose of this study was to quantitatively synthesize quality and quantity of instruction studies with the same or similar independent variables in the published science education grade 6-12 research of the 1963-1978 period. Fifty-two studies formed six clusters and revealed significant positive cognitive outcomes due to the use of preinstructional strategies, training in scientific thinking, increased structure in the verbal content of materials, and increased realism or concreteness in adjunct materials. In general, systematic innovation in instruction was found to produce positive improvements over the norm or traditional practice. Methodologically, improved research design quality was related to larger effect sizes. Recommendations are made regarding application, use of multiple measures, attitudinal research, use of general education findings, and the reporting of research.     

The Effect of Private School Vouchers on Political Participation: Experimental Evidence From New York City

In 1997, the New York School Choice Scholarships Foundation Program (SCSF) randomly offered three-year scholarships to attend private schools to approximately 1,000 low-income families in New York City. In this paper we leverage exogenous variation generated by the SCSF to estimate the causal effect of the private school voucher offer—and the private school attendance it induced—on later-life voter registration and turnout outcomes. Our results demonstrate that the voucher intervention had no effect on registering to vote or voting in any of several elections for either the full sample or any of several demographic subgroups. Although unique aspects of the SCSF context impose limits on the scope of our results, they have clear implications for assessing the relative effectiveness of public and private schools in preparing democratic citizens. We close the paper by discussing the implications of the results for research and policy.     

The Development of Teacher Knowledge in Support of Student Mathematical Inquiry

Abstract

Applying the Mathematical Knowledge for Teaching framework, we discuss the components of teacher knowledge that might be useful in supporting mathematical inquiry, and examine ways in which we strive to develop this knowledge within a middle grades mathematics program for undergraduate students who are prospective teachers. Using sample activities from multiple courses in the program, we offer general principles of instruction for supporting mathematical inquiry at all grade levels. We contend that an awareness and application of the multiple facets of mathematical knowledge for teaching can be critical to supporting mathematical inquiry across the K-16 spectrum.