Biomedical subjects

E R Hirt

Publications and source records attributed to E R Hirt.

4 recordsLinked to original sources

PubMed1997

When expectancy meets desire: motivational effects in reconstructive memory.

Two studies investigated the effects of motivational factors on expectancy use in reconstructive memory. Participants were given target's midterm grades for later recall; expectancies about the target's future performance were then manipulated. Participants' desires to see their expectancies confirmed were manipulated by making the target likable or unlikable. The authors hypothesized that when expectancy and liking "matched," participants would give significant weight to their expectancies at retrieval, resulting in expectancy-congruent distortion of the midterm grades. However, when expectancy and liking were "mismatched," expectancies would be discontinued, and participants would show little or no expectancy-congruent distortion. Results supported these predictions. Study 2 varied the order of the expectancy and liking information. Order affected the process by which mismatch participants discounted their expectancies. Results demonstrate that motivations not only may bias memory search but also may affect the reconstruction of existing memory traces.

Analysis of Variance↗

PubMed1996

Processing goals, task interest, and the mood-performance relationship: a mediational analysis.

The authors examined the role of intrinsic interest in mediating the relationship among mood, processing goals, and task performance. Participants in induced happy, neutral, or sad moods generated similarities and differences between TV shows using performance-based, enjoyment-based, or no stop rule (cf. L.L. Martin, D.W. Ward, J.W. Achee, & R.S. Wyer, 1993). Pretask interest and both quantitative (time spent, number generated) and qualitative (creativity) performance were assessed. Happy participants spent more time and generated more items than other participants when using an enjoyment-based stop rule but spent less time and generated fewer items when using a performance-based stop rule. Happy participants also expressed greater pretask interest and were more creative than other participants regardless of stop rule. Regression-based path analyses indicated that pretask interest partially mediated the effects of mood on quantitative performance but not on creativity.

Affect↗

PubMed1991

Self-reported versus behavioral self-handicapping: empirical evidence for a theoretical distinction.

The present study was an investigation of how Ss would respond when given 2 self-handicapping options, 1 behavioral (withdrawal of practice effort) and 1 self-reported (reporting high levels of stress). Ss anticipating a diagnostic test of intellectual ability were given different instructions regarding the effects of stress and practice on test performance. Ss were told that (a) stress only, (b) practice only, (c) both stress and practice, or (d) neither stress nor practice affected test scores. Ss were then given the opportunity to self-report a handicap on a stress inventory and to behaviorally self-handicap by failing to practice before the test. High self-handicapping men and women showed evidence of self-reported handicapping, but only high self-handicapping men behaviorally self-handicapped. However, when both self-handicaps were viable, both high self-handicapping men and women preferred the self-reported over the behavioral self-handicap.

Achievement↗

PubMed1988

Probability and category redefinition in the fault tree paradigm.

Fault trees have been advocated as aids for problem solvers. However, research has suggested limitations in their usefulness. Fischhoff, Slovic, and Lichtenstein (1978) found that subjects given incomplete (pruned) trees were insensitive to omissions; these authors hypothesized that Tversky and Kahneman's (1974) availability heuristic was the mediating factor. Using a within-subjects design, subjects in Experiment 1 received both full and pruned trees and estimated probabilities for various reasons why a car would fail to start. To increase the availability of omissions, some Experiment 1 subjects first generated possible causes of starting failure. The basic Fischhoff et al. findings were replicated, but several aspects of the results argued against the availability hypothesis as the mechanism for judgment. Instead, subjects appeared to idiosyncratically redefine category membership when making judgments based upon pruned trees. By employing a sorting task in Experiment 2 we corroborated the results of Experiment 1: Subjects do redefine the actual contents of the categories when faced with an omission from the fault tree. The implications of these results for the use of fault trees as a problem solving aid are discussed.

Decision Trees↗