Species distribution modeling often involves high-dimensional environmental data. Large amounts of data and multicollinearity among covariates impose challenges to statistical models in variable selection for reliable inferences of the effects of environmental factors on the spatial distribution of species. Few studies have evaluated and compared the performance of multiple machine learning (ML) models in handling multicollinearity.
View Article and Find Full Text PDFThere is little empirical evidence linking academic demands or rigor to alcohol consumption by college students. In a 3-week daily study of full-time college students at a public, residential campus in the United States, both current day and next day's academic demands were negatively related to alcohol consumption, and these relationships were mediated by daily academic effort. Academic demands on the previous day were not related to alcohol consumption, indicating that students do not engage in compensatory or celebratory drinking when demands end.
View Article and Find Full Text PDFWe examined the within-person relationships between daily work stressors and alcohol consumption over 14 consecutive days in a sample of 106 employed college students. Using a tension reduction theoretical framework, we predicted that exposure to work stressors would increase alcohol consumption by employed college students, particularly for men and those with stronger daily expectancies about the tension reducing properties of alcohol. After controlling for day of the week, we found that hours worked were positively related to number of drinks consumed.
View Article and Find Full Text PDFThe processes linking job characteristics to school performance and satisfaction in a sample of 253 full-time college students were examined from 2 role theory perspectives, 1 of which emphasized resource scarcity and the other resource expansion. Model tests using structural equation modeling showed that 2 resource-enriching job characteristics, job-school congruence and job control, were positively related to work-school facilitation (WSF). Two resource-depleting job characteristics, job demands and work hours, were positively related to work-school conflict (WSC), and job control was negatively related to WSC.
View Article and Find Full Text PDFThis study used objective measures of job characteristics appended to the National Survey of Midlife Development in the United States (MIDUS), self-reported job characteristics, and an individual resource characteristic (orientation toward personal growth) to test a theory of work-family facilitation. Results indicated that resource-rich jobs enable work-to-family facilitation. A higher level of work-to-family facilitation was reported by individuals in jobs with more autonomy and variety and whose jobs required greater substantive complexity and social skill.
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