Some Reasons for Distinguishing Between “Non-normative Response” and “Irrational Decision”

Three concerns that limit the implications of normative decision research were described in this study. First, because there is no unequivocal way to determine whether any particular base rate is appropriate in a particular instance, the significance of the apparent base rate underutilization reported by a number of investigators is unclear. Second, because there are discrepancies between natural language and formal logic, word problems are an uncertain domain within which to gauge human inferential skills. Third, because different people will have different strategies and preferences, no single solution may be correct or optimal for all persons. In light of these limitations, a more functional approach to decision interpretation is discussed.     

Nonlinear Structured Growth Mixture Models in Mplus and OpenMx

Growth mixture models (GMMs; B. O. Muthén & Muthén, 2000; B. O. Muthén & Shedden, 1999) are a combination of latent curve models (LCMs) and finite mixture models to examine the existence of latent classes that follow distinct developmental patterns. GMMs are often fit with linear, latent basis, multiphase, or polynomial change models because of their common use, flexibility in modeling many types of change patterns, the availability of statistical programs to fit such models, and the ease of programming. In this article, we present additional ways of modeling nonlinear change patterns with GMMs. Specifically, we show how LCMs that follow specific nonlinear functions can be extended to examine the presence of multiple latent classes using the Mplus and OpenMx computer programs. These models are fit to longitudinal reading data from the Early Childhood Longitudinal Study–Kindergarten Cohort to illustrate their use.     

The combined effect of ratee's bodyweight and past performance information on performance judgments

Few studies have examined how various biases operate in combination to influence performance judgments. Along these lines, the current study used experimental methods to test four competing models of the combined influence of ratee's bodyweight and past performance information on performance judgments. Results were consistent with an additive model, such that ratee's bodyweight and information about ratee's past performance combined independently to affect performance judgments. Consistent with a double disadvantage effect, the least favorable performance judgments were made for an overweight ratee with poor previous performance. Finally, mixed evidence was obtained for the interaction of ratee's bodyweight and perceptions of ratee's physical attractiveness, such that high‐perceived attractiveness buffered against the otherwise negative performance ratings associated with overweight status.     

Two skeptical arguments or only one?

The first step in responding to the challenge of external world skepticism is to get clear on the structure of the skeptic’s argument. The most prominent varieties of skeptical arguments either rely on closure principles or underdetermination principles. The relationship between these two sorts of arguments is contentious. Some argue that these arguments can independently motivate skepticism. Others argue that they are really equivalent. I argue that although these two arguments are distinct, their independence is not as obvious as some have thought. The fact that these arguments are not equivalent is important because skeptical arguments that appeal to underdetermination principles cannot be refuted by simply denying closure. So, the strategy for responding to skepticism offered by Nozick/Dretske does not seem an adequate solution.     

Alienation and empathy as mediators of the relation between Social Dominance Orientation,Right-Wing Authoritarianism and expressions of racism and sexism

Prior research has established a link between Social Dominance Orientation (SDO), empathy, and generalized measures of prejudice. Whether empathy functions as a mediator for more specific forms of prejudice has not been studied. Furthermore, alienation and its role in predicting prejudice have been given little attention in the literature. Our results found that empathy functioned as a mediator for SDO, but only for sexism, not racism. Alienation was found to act as a mediator between SDO and both racism and sexism. The relation between Right-Wing Authoritarianism and racism and sexism was not mediated by alienation.     

Collaborative Group Memory: Processes,Performance, and Techniques for Improvement

Groups are often asked to perform important tasks that require them to remember and report accurate information. A review of research on memory processes in groups suggests that collaboration enhances select performance outcomes. Collaboration allows group members to pool their memories and correct one another’s memory errors. Nonetheless, there are opportunities for improvement in the memory performance of collaborative groups. Collaborative groups typically do not recall as much information as the same number of individuals working alone and sometimes fail to correct the memory errors of their members. In this article, we integrate research findings to present an account of collaborative group memory processes and performance. We present a cognitive-social-motivational framework for viewing collaborative group memory processes, emphasize the value of collaboration on memory tasks, and suggest ways in which collaborative group memory performance may be improved.     

The effects of framing and action instructions on whether older adults obtain flu shots.

The authors tested the effects of cues to action--messages intended to increase flu immunizations. North Dakota counties were randomly assigned to reminder letters, action letters, or no letters. Within the reminder-letter counties, Medicare recipients received either (a) a reminder from the state peer review organization (PRO) to obtain a flu shot or (b) a reminder from the PRO, framed either in terms of the loss associated with failing to get a shot or (c) the benefits associated with getting a shot. Within the action-letter counties, Medicare recipients leaned where and when to receive a flu shot. Reminder type failed to differentially affect the immunization rate (overall M = 24.5%). However, the action messages worked better (28.2%) than no message (19.6%).