Approaching the familiar: On the ability of mere exposure to direct approach and avoidance behavior

The mere-exposure literature has shown that familiar objects are preferred to novel objects. However, no work has definitively shown that mere exposure can direct and facilitate approach movements. In Experiment 1, participants were shown stimuli and were later re-exposed to them along with novel stimuli. Participants were directed to make an approach or avoidant motion to each and response times were recorded. As predicted, participants were quicker to approach and slower to avoid familiar relative to novel stimuli. In Experiment 2, participants were shown mere-exposed and novel symbols and were asked to “push” or “pull” a joystick in response to each, based on their intuition. Extending Experiment 1’s findings, participants freely selected an approach response more frequently for familiar compared to novel stimuli. Moreover, in this same experiment, familiar stimuli were judged as more likeable than were novel stimuli, and participants’ liking for familiar stimuli correlated with the frequency with which they were approached. Implications of these findings are discussed.     

What is learned from experience in a probabilistic environment?

Three experiments explored what is learned from experience in a probabilistic environment. The task was a simulated medical decision‐making task with each patient having one of two test results and one of two diseases. The test result was highly predictive of the disease for all participants. The base rate of the test result was varied between participants to produce different inverse conditional probabilities of the test result given the disease across conditions. Participants trained using feedback to predict a patient's disease from a test result showed the classic confusion of the inverse error, substituting the forward conditional probability for the inverse conditional probability when tested on it. Additional training on the base rate of the test result did little to improve performance. Training on the joint probabilities, however, produced good performance on either conditional probability. The pattern of results demonstrated that experience with the environment is not always sufficient for good performance. That natural sampling leads to good performance was not supported. Further, because participants not trained on joint probabilities did, however, know them but still committed the confusion of the inverse error, the hypothesis that having joint probabilities would facilitate performance was not supported. The pattern of results supported the conclusion that people learn all the necessary information from experience in a probabilistic environment, but depending upon what the experience was, it may interfere with their ability to recall to memory the appropriate sample set necessary for estimating or using the inverse conditional probability. Copyright © 2004 John Wiley & Sons, Ltd.     

Racial and Religious Convergences and Divergences among Christian Students’ Approaches to Color-Blindness,Color-Cognizance,and Race in Christian Organizations

Drawing on survey data of Christian students (N = 4261) enrolled at 11 colleges that are part of the Council for Christian Colleges and Universities, we examine color-blindness, different types of color-cognizance, and views on race in Christian organizations. We find significant differences between students of color and White students in color-blindness and color-cognizance but find racial convergence in the importance of racial reconciliation. Net of controls, greater evangelical orthodoxy is associated with color-cognizant views that perceive prejudicial treatment against White people, undercut the experiences of people of color, and is associated with more positive views of Christian organizations’ roles in race relationships. Concurrently, upper year students differ significantly from first years in their racial attitudes and views on race in Christian organizations, suggesting that Christian education may shape racial views positively. Our findings have implications for theorizing how evangelical Christianity and evangelical colleges maintain and challenge color-blindness and White supremacy.     

Diagnostic hypothesis generation and human judgment

Diagnostic hypothesis-generation processes are ubiquitous in human reasoning. For example, clinicians generate disease hypotheses to explain symptoms and help guide treatment, auditors generate hypotheses for identifying sources of accounting errors, and laypeople generate hypotheses to explain patterns of information (i.e., data) in the environment. The authors introduce a general model of human judgment aimed at describing how people generate hypotheses from memory and how these hypotheses serve as the basis of probability judgment and hypothesis testing. In 3 simulation studies, the authors illustrate the properties of the model, as well as its applicability to explaining several common findings in judgment and decision making, including how errors and biases in hypothesis generation can cascade into errors and biases in judgment.     

Training working memory: Limits of transfer

In two experiments (totaling 253 adult participants), we examined the extent to which intensive working memory training led to improvements on untrained measures of cognitive ability. Although participants showed improvement on the trained task and on tasks that either shared task characteristics or stimuli, we found no evidence that training led to general improvements in working memory. Using Bayes Factor analysis, we show that the data generally support the hypothesis that working memory training was ineffective at improving general cognitive ability. This conclusion held even after controlling for a number of individual differences, including need for cognition, beliefs in the malleability of intelligence, and age.     

Motivated to retrieve: how often are you willing to go back to the well when the well is dry?

Despite the necessity of the decision to terminate memory search in many real-world memory tasks, little experimental work has investigated the underlying processes. In this study, the authors investigated termination decisions in free recall by providing participants an open-ended retrieval interval and requiring them to press a stop button when they had finished retrieving. Three variables important to assessing one's willingness to search memory were examined: (a) the time spent searching memory after the last successful retrieval before choosing to quit (the exit latency); (b) task difficulty; and (c) individual differences in motivation, as measured by Webster and Kruglanski's (1994) Need for Closure Scale. A strong negative correlation was found between individual differences in motivation and participants' exit latencies. This negative correlation was present only when the retrieval task started out as relatively difficult.