Facilities that self-police under the Environmental Protection Agency's Audit Policy are eligible for reduced penalties on disclosed violations. This paper investigates whether self-policing has additional consequences; in particular, whether self-policing reduces future enforcement activity. Using data on U.S. hazardous waste enforcement and…

Errorless compliance training is a noncoercive, success-focused approach to treatment of problem behavior in children. The intervention involves graduated exposure of a child to increasingly more challenging requests at a slow enough rate to ensure that noncompliance rarely occurs, providing parents with many opportunities to reinforce cooperative…

The first case study of identical male twins concordant for DSM-IV Asperger's disorder (ASD) was presented. Their monozygocity was confirmed by short tandem repeat analyses with a probability of 99.999963%. Despite sharing the same DNA and environment, the twins are different in comorbidity (i.e., major depressive disorder in the elder and absence…

We analyze probability content within middle grades (6, 7, and 8) mathematics textbooks from a historical perspective. Two series, one popular and the other alternative, from four recent eras of mathematics education (New Math, Back to Basics, Problem Solving, and Standards) were analyzed using the Mathematical Tasks Framework (Stein, Smith,…

Purpose: To evaluate whether the validity of the Receptive Vocabulary scale of the MacArthur Communicative Development Inventory for Infants (MCDI-I; L. Fenson et al., 1991), a parent-report measure of early vocabulary, could be improved for children with autism spectrum disorders (ASD) by removing items that are biased. Method: Logistic…

The Andrew W. Mellon Foundation's Graduate Education Initiative (GEI) provided funding to 54 departments in the humanities and related social sciences during the 1990s to improve their PhD programs. This article estimates the aspects of PhD programs the GEI influenced and how these aspects influenced attrition and graduation probabilities. It uses…

We propose that researchers should utilize ratio scores when examining the response styles theory rather than examine each of the response styles separately. Higher ratio scores indicate a higher probability of engaging in ruminative, as opposed to distracting and problem solving, behaviors. In Phase One, we examined the factor structure and…

This chapter provides an overview of sampling methods that are appropriate for conducting online surveys. The authors review some of the basic concepts relevant to online survey sampling, present some probability and nonprobability techniques for selecting a sample, and briefly discuss sample size determination and nonresponse bias. Although some…

Growing evidence suggests that lesbian, gay, and bisexual adults may be at elevated risk for mental health and substance use disorders, possibly due to anti-gay stigma. Little of this work has examined putative excess morbidity among ethnic/racial minorities resulting from the experience of multiple sources of discrimination. The authors report…

The current 5-year accelerated longitudinal investigation modeled the developmental trajectories of aggressive behaviors in 10,107 predominantly minority (greater than 70%; African American, American Indian, Asian American, and Hispanic) children and early adolescents (Kindergarten through 8th grade, 49% female youth) from lower to lower-middle…

Social scientists have repeatedly demonstrated that individuals tend to underutilize base-rate information in favor of case-specific information in problems investigating subjective probability estimation. Despite the pervasiveness of this base-rate fallacy, little progress has been made in establishing a definitive explanation for its cause. This…

Methods of determining probabilities of various outcomes of the game Yahtzee are described. (SD)

The purpose of the present study was to determine whether the results obtained by Knowles et al. were a result of varying levels of redundancy or varying levels of other task parameters. (Author)

Multinomial-response models are available that correspond implicitly to tests in which a total score is computed as the sum of polytomous item scores. For these models, joint and conditional estimation may be considered in much the same way as for the Rasch model for right-scored tests. As in the Rasch model, joint estimation is only attractive if…

The purpose of the study was to determine whether students had knowledge of the extension rule (the conjunction of two or more events cannot be greater than the probability of any one of those events) and understanding of conjunction by giving a test of multiplicative probabilities. Involved were 598 students enrolled in introductory psychology…