Fractions are foundational for success in algebra and STEM, but they are notoriously difficult for students. In past work, two separate branches of research from psychology and math education have studied fractions knowledge using different, isolated approaches. In this dissertation, I synthesize research from both fields about proportional…

The present study explored the effect of instructing middle school students in sixth, seventh, and eighth grades in positive psychology lessons, as compared to control classes that did not receive this positive psychology instruction. This study used quantitative procedures to determine the implementation of this curriculum on lowering student…

Academically engaging adolescents with learning difficulties continues to be a challenge for teachers and education authorities around the world. This paper reports on one part of a broader study to address the impasse present between research and practice in meeting the needs of adolescents with learning difficulties. Drawing on the mounting…

Educators across the United States have searched for avenues to improve students' mathematics achievement since the publication of "A Nation at Risk" (National Commission on Excellence in Education, 1983) which reported that American students were behind students in other countries academically. Recent legislation, No Child Left Behind…

In 4 studies, the authors examined how intuitions about the relative difficulties of the sciences develop. In Study 1, familiar everyday phenomena in physics, chemistry, biology, psychology, and economics were pretested in adults, so as to be equally difficult to explain. When participants in kindergarten, Grades 2, 4, 6, and 8, and college were…

Piagetian theory describes mathematical development as the construction and organization of mental operations within psychological structures. Research on student learning has identified the vital roles of two particular operations--splitting and units coordination--play in students' development of advanced fractions knowledge. Whereas Steffe and…

Two kinds of parental behaviors--psychological control and emotional warmth--have been linked with children's shy behaviors. The questions we addressed are whether this applies to adolescent shyness, and whether shyness in itself might also affect perceptions of parental behaviors. The participants were 916 seventh to ninth graders in a…

The objective of this study was to examine differences in psychological distress, service utilization, and prescriptions for medications between adolescents with histories of family involvement with child protective services (CPS) and adolescents without such involvement. Data on 3,497 students were obtained from the 2009 cycle of the Ontario…

Chinese parents exert more control over children than do American parents. The current research examined whether this is due in part to Chinese parents' feelings of worth being more contingent on children's performance. Twice over a year, 215 mothers and children (M[subscript age] = 12.86 years) in China and the United States (European and African…

Ethnic identity, the extent to which one defines one's self as a member of a particular ethnic group, has been found to be an important predictor of African American adolescents' psychological and behavioral well-being. This study experimentally examined the effects of a school-based emancipatory intervention on the ethnic identity of African…

Parenting behaviors have been linked to children's self regulation, but it is less clear how they relate to adolescent psychological flexibility. Psychological flexibility is a broad construct that describes an individual's ability to respond appropriately to environmental demands and internal experiences in the service of their goals. We examined…

The skill-development model contends that achievements have an effect on academic self-confidences, while the self-enhancement model contends that self-confidences have an effect on achievements. Differential psychological processes underlying the 2 models across the domains of mathematics and science were posited and examined with structural…

What are the characteristics leading teachers to nominate gifted students in Spain? To answer this question, several demographic (i.e., gender, grade) and psychological (i.e., multiple intelligences, emotional intelligence, intellectual aptitude, and divergent thinking) characteristics of 563 secondary students nominated as gifted by their…

Background: Although psychological disengagement is a well-documented phenomenon in the academic setting, the attempts to identify its predictors are scarce. In addition, existing research has mainly focused on chronic disengagement and less is known on the determinants of situational disengagement. Aims: The purpose of the present study was to…

Previous studies with adults have shown that age has an important influence on laypeople's wisdom theories. However, children's and adolescents' understanding of the concept of wisdom has hardly been investigated. In the current study, 80 children and adolescents completed a questionnaire concerning an event where they had been wise and an event…