Emotion malleability beliefs predict daily positive and negative affect in adolescents.

The present study examined the relationship between emotion malleability beliefs and daily positive affect (PA) and negative affect (NA) in adolescents. 639 participants provided information about emotion malleability beliefs and emotion regulation strategies on the first day of the study and six daily measurements of PA and NA. Emotion malleability beliefs had a positive relationship with PA and a negative relationship with NA.

The Role of Opportunity to Learn on Student Mathematics Anxiety, Problem-Solving Performance, and Mathematics Performance.

This study examined the effects of opportunity to learn (OTL) or the content coverage in mathematics on student mathematics anxiety, problem-solving performance, and mathematics performance. The pathways examining the influences of OTL on student problem-solving performance and mathematics performance mathematics anxiety were also tested. A sample of 1,676 students from Shanghai-China, and a sample of 1,511 students from the United States who participated in the Programme for International Student Assessment (PISA) 2012 were used for the analyses.

The Decomposition of Between and Within Effects in Contextual Models.

In contextual studies, group compositions are often extracted from individual data in the sample, in order to estimate the group compositional effects [e.g., school socioeconomic status (SES) effect] controlling for interindividual differences in multilevel models.