Winston R. Sieck

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Recency effects (REs) have been well established in memory and probability learning paradigms but have received little attention in category earning research. Extant categorization models predict REs to be unaffected by learning, whereas a functional interpretation of REs, suggested by results in other domains, predicts that people are able to learn(More)
Exemplar and connectionist models were compared on their ability to predict overconfidence effects in category learning data. In the standard task, participants learned to classify hypothetical patients with particular symptom patterns into disease categories and reported confidence judgments in the form of probabilities. The connectionist model asserts(More)
Three studies examined cultural variations in indecisiveness among Chinese, Japanese, and Americans. In Study 1, validated self-report, comprehensive measures of indecisiveness indicated large cultural differences, with Japanese participants exhibiting substantially more indecisiveness than Chinese or Americans. Study 2 provided evidence that such cultural(More)
We describe a study intended to determine whether cultural variations in collaborative decision making are due to differences in beliefs about ideal collaboration processes, or are a reflection of distinct social norms. The results of a web-based survey study that included respondents from India, S. Korea, Turkey, and the U.S. were obtained using a recent(More)
Many of us share a strong intuition that justification forces us to better understand the situations we face. And there is substantial evidence indicating that this is often the case. However, there is a growing body of research showing that, under certain circumstances, explanation and justification can impair performance on a variety of cognitive tasks.(More)
We describe the Aggregative Contingent Estimation System (, which is designed to elicit and aggregate forecasts from large, diverse groups of individuals. The Aggregative Contingent Estimation System (ACES; see is a project funded by the Intelligence Advanced Research Projects Activity. The(More)
OBJECTIVE The goals of this study were (1) to determine the prevalence of child maltreatment in hospitalized children and adolescents with developmental disabilities and concomitant psychiatric disorders, and (2) to identify the contribution of specific mother and child characteristics to the use of more severe disciplinary practices by mothers. METHOD(More)
In May 2006, the US Army Research Laboratory and UK Ministry of Defense created the international technology alliance. The consortium of 26 partners including the ARL and MoD offers an open research environment in which leading US and UK companies and universities can collaborate (see table 1). It will also fuse the best aspects of the US Army's(More)
A method is described for studying in detail the common perspective that members of a culture bring to a situation. The method results in models of the culture that provide a basis for outsiders to begin to frame events from the cultural-insider point of view. The cultural models can then be used to identify priority cultural aspects to emphasize in(More)
A number of studies in the network science literature have attempted to model the effect of network structure on cognitive state fluctuations in social networks. For the most part, these networks use highly simplified models of both cognitive state and social influence. In order to extend these studies and provide the basis for more complex network science(More)