Autism susceptibility genes likely have effects on continuously distributed autism-related traits, yet few measures of such traits exist. The Broader Phenotype Autism Symptom Scale (BPASS), developed for use with affected children and family members, measures social motivation, social expressiveness, conversational skills, and flexibility. Based…

This paper reports on three studies of shy behavior in Mainland Chinese children. In Study 1 (N = 107, M age = 10.05), a Chinese Shyness Scale (CSS) was developed based on Chinese teachers' open-ended descriptions of children's shy behavior. In Study 2 (N = 388, M age = 10.80) and Study 3 (N = 198, M age = 10.20), the construct validity of the two…

When standardized English-language tests are administered to test takers worldwide, the test-taking population could be varied on a number of personal and educational characteristics such as age, gender, first language, and academic discipline. As test tasks and test items may not always be prepared keeping this diversity of characteristics in…

This two-phase study integrated quantitative and qualitative research methods to investigate the relationship between success outcomes of two-year college students with disabilities and self-determination, and how students with higher and lesser degrees of self-determination understand and describe the outcomes of their post-secondary experience.…

This study examines children's social responses to gender cues in synthesized speech in a computer-based instruction setting. Eighty 5th-grade elementary school children were randomly assigned to one of the conditions in a full-factorial 2 (participant gender) x 2 (voice gender) x 2 (content gender) experiment. Results show that children apply…

Prisoner's Dilemma is a common game theory scenario in which two players must choose between acting cooperatively or out of pure self-interest. What a player decides affects not only his own outcome but also that of the other player. "Friend or Foe," a TV game show that has appeared on the cable Game Show Network (GSN), places pairs of contestants…

This study examines differences between team-taught and solo-taught sections of a graduate introductory course on research and statistics in terms of student perceptions and achievement. Factor analysis of survey data confirmed three factors: comfort with research and statistics; the relationship of research and statistics to work; and interest in…

Mixed methods research has increased in popularity over the past 20 years. Literature reveals that exploratory qualitative analysis followed by confirmatory survey research is common and concurrent studies outnumber longitudinal design. Longitudinal studies using quantitative and qualitative methods in sequence for exploratory purposes are rare,…

This study investigated the effects of second language (L2) proficiency differences in pairs and patterns of interaction on L2 learning, making use of both qualitative and quantitative data. We designed the study in such a way that four different "core" participants interacted with higher and lower proficiency "non-core"…

Several researchers have suggested that definitional skill explains academic success/failure (Gagne, 2004; Snow, 1987). The words used to investigate definitional skill have all been concrete words given in the first language (L1) and/or the second language (L2) of the participants. This paper reports a study investigating the quality of the…

Inference, or decision making, is seen in curriculum documents as the final step in a statistical investigation. For a formal statistical enquiry this may be associated with sophisticated tests involving probability distributions. For young students without the mathematical background to perform such tests, it is still possible to draw informal…

Although depression is strongly associated with suicide attempts and suicide deaths, most depressed youth do not make an attempt, indicating the need to identify additional risk factors. We examined suicide attempts among 451 depressed primary care patients, 13 to 21 years of age. In bivariate analyses, youth classified as suicide attempters…

In a nonrandomized or observational study, propensity scores may be used to balance observed covariates and trajectory groups may be used to control baseline or pretreatment measures of outcome. The trajectory groups also aid in characterizing classes of subjects for whom no good matches are available and to define substantively interesting groups…

Differential item functioning (DIF) continues to receive attention both in applied and methodological studies. Because DIF can be an indicator of irrelevant variance that can influence test scores, continuing to evaluate and improve the accuracy of detection methods is an essential step in gathering score validity evidence. Methods for detecting…

The trend of using e-learning as a learning and/or teaching tool is now rapidly expanding into education. Although e-learning environments are popular, there is minimal research on instructors' and learners' attitudes toward these kinds of learning environments. The purpose of this study is to explore instructors' and learners' attitudes toward…