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Simulation Of Social Networks To Maximize The Prevention And Treatment Of Alcohol Use Disorders, Kevin Hallgren
Simulation Of Social Networks To Maximize The Prevention And Treatment Of Alcohol Use Disorders, Kevin Hallgren
Psychology ETDs
Introduction: Previous studies have found associations between alcohol use and having heavy-drinking social networks. This association is thought to be caused by (1) social influence, where ones social network influences his or her drinking, and (2) social selection, where an individual forms relationships with individuals who drink at similar levels. These processes are reciprocal and, when acting simultaneously, create a feedback loop with non-linear dynamics. Computer simulations have allowed complex systems to be modeled in many scientific fields; however, this method has not yet been used to study the dynamic associations between social networks and alcohol use. Method: The present …
Ignoring Individual Differences In Times Of Assessment In Growth Curve Modeling, Patrick Coulombe
Ignoring Individual Differences In Times Of Assessment In Growth Curve Modeling, Patrick Coulombe
Psychology ETDs
Researchers often collect longitudinal data so as to model change over time in a phenomenon and for a population of interest. Inevitably, there will be some variation across individuals in specific time intervals between assessments. By necessity or by choice, a researcher can decide to ignore these individual differences in times of assessments. In this simulation study of growth curve modeling, I investigate how ignoring individual differences in time points when modeling change over time relates to convergence and admissibility of solutions, bias in estimates of parameters, power to detect change over time, and, when there is no change over …