Alex K Chavez

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While computational cognitive modeling has made great strides in addressing complex dynamic tasks, the modeling of individual differences in complex tasks remains a largely unexplored area of research. In this paper we present a straightforward approach to modeling individual differences, specifically age-related cognitive differences, in complex tasks, and(More)
Research on the relationship of social support and arterial blood pressure was conducted in a town in central Mexico. A culturally appropriate measure of social support was developed assessing perceived support from relatives, friends, neighbors, and compadres (ritual kin). The effects of perceived support from these four sources were compared to the(More)
Metagames (Howard, 1968), a class of formal models in game theory, model the strategic reasoning among players who mutually predict each others actions recursively (" I think you think I think. .. "). We present a framework for three-player games based on metagame theory. This framework is well-suited to the analysis of nation-states, especially when the(More)
The sensitivity to fairness undergoes relevant changes across development. Whether such changes depend on primary inequity aversion or on sensitivity to a social norm of fairness is still debated. Using a modified version of the Ultimatum Game that creates informational asymmetries between Proposer and Responder, a previous study showed that both(More)
1 Abstract. We measured the beliefs and behavior of third parties who were given the opportunity to add to or deduct from the payoffs of individuals who engaged in an economic bargaining game under different social contexts. Third parties rewarded bargaining outcomes that were equal and compensated victims of unfair bargaining outcomes rather than punishing(More)
PURPOSE Previous studies on standardized patient (SP) exams reported score gains both across attempts when examinees failed and retook the exam and over multiple SP encounters within a single exam session. The authors analyzed the within-session score gains of examinees who repeated the United States Medical Licensing Examination Step 2 Clinical Skills to(More)
Our primary goal is to develop a comprehensive model of human multitasking in a cognitive architecture. We are taking a bottom-up approach to this problem, starting by modeling small-scale, albeit complex, dual-task experiments. Using the ACT-R cognitive architecture (Anderson & Lebiere, 1998), we modeled the Martin-Emerson and Wickens (1992) tracking and(More)
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