The purpose of this study was to evaluate probabilistic reasoning of seventh-grade students (N=167) studying at randomly selected three middle schools that served low and middle socioeconomic areas in a city of Turkey. "Probabilistic Reasoning Test (PRT)" was developed and used as a data collection tool. In analyzing the data,…

This study examined the relationship between facial width-to-height ratio (fWHR), an established marker of testosterone level and dominance, and eminent writers' achievement. The fWHR of laureates (N = 39) and nominees (N = 247) of the Nobel Prize in Literature 1901-1950 was measured together with historiometric data. It was demonstrated that…

The Portland Timbers won their first Major League Soccer (MLS) Cup Championship in December 2015. However, if it had not been for a kind double goalpost miss during a penalty shootout a few weeks earlier, the Timbers would never have been in the finals. On Oct. 30th, after what has been called "the greatest penalty kick shootout in MLS…

Team-based learning (TBL) is an instructional method that has been shown to reduce attrition and increase student learning in a number of disciplines. TBL was implemented in a first-semester general chemistry course, and its effect on attrition was assessed. Attrition from sections before implementing TBL (fall 2008 to fall 2009) was compared with…

Teaching probability and statistics is more than teaching the mathematics itself. Historically, the mathematics of probability and statistics was first developed through analyzing games of chance such as the rolling of dice. This article makes the case that the understanding of probability and statistics is dependent upon building a…

Finding ways to enhance introductory students' understanding of probability ideas and theory is a goal of many first-year probability courses. In this article, we explore the potential of a prototype tool for Markov processes using dynamic visualizations to develop in students a deeper understanding of the equilibrium and hitting times…

In August 2015, in an article entitled "Estimating the Reproducibility of Psychology Science," the journal "Science" reported the findings of a comprehensive collaboration of social scientist researchers, collectively described as the "Open Science Collaboration" (OSC), who replicated the findings of 100 experiments…

We used housing data from a Chinese college to examine peer effects on students' major persistence and major choices after dropping out of their initial majors. Random checks were performed to ensure that student peers--dormitory roommates and social group mates--were randomly assigned according to a few known factors. In addition, two peer groups…

Purpose: The purpose of this study was to determine the extent to which school-age children with speech sound disorder (SSD) exhibit concomitant reading difficulties and examine the extent to which phonological processing and speech production abilities are associated with increased likelihood of reading risks. Method: Data were obtained from 120…

Background: College wellness interventions have potential to reduce the growing burden of cardiovascular disease (CVD) by guiding students to establish behaviors for lifetime CVD risk reduction. Yet, some students may not see CVD prevention as a relevant issue during young adulthood. Purpose: We examined perceived risk of CVD amongst 148 college…

In 2006, the BBVA Foundation in Mexico designed a scholarship and mentoring program that targeted vulnerable lower secondary education students in municipalities with high-intensity migration rates. We follow applicants who started lower secondary education in 2009 to estimate the impact of the Program on the probability of graduating from the…

This three-study dissertation investigated how socioeconomic factors and policies are associated with educational outcomes for undocumented youth and, in one of the papers, to what extent education and employment outcomes intersect. Guided by the specific questions of each study, the three papers take different theoretical and methodological…

I conduct a statewide experiment in Michigan with nearly 50,000 high-achieving high school seniors. Treated students are mailed a letter encouraging them to consider college and providing them with the web address of a college information website. I find that very high-achieving, low-income students, and very high-achieving, minority students are…

While recent studies suggest children can use cross-situational information to learn words, these studies involved minimal referential ambiguity, and the cross-situational evidence overwhelmingly favored a single referent for each word. Here we asked whether 2-5-year-olds could identify a noun's referent when the scene and cross-situational…

Calculating Laplace transforms from the definition often requires tedious integrations. This paper provides an integration-free technique for calculating Laplace transforms of many familiar functions. It also shows how the technique can be applied to probability theory.