Biomedical subjects

Norbert L Kerr

Publications and source records attributed to Norbert L Kerr.

5 recordsLinked to original sources

PubMed2006

Chaos in the courtroom reconsidered: emotional bias and juror nullification.

A widespread presumption in the law is that giving jurors nullification instructions would result in "chaos"-jurors guided not by law but by their emotions and personal biases. We propose a model of juror nullification that posits an interaction between the nature of the trial (viz. whether the fairness of the law is at issue), nullification instructions, and emotional biases on juror decision-making. Mock jurors considered a trial online which varied the presence a nullification instructions, whether the trial raised issues of the law's fairness (murder for profit vs. euthanasia), and emotionally biasing information (that affected jurors' liking for the victim). Only when jurors were in receipt of nullification instructions in a nullification-relevant trial were they sensitive to emotionally biasing information. Emotional biases did not affect evidence processing but did affect emotional reactions and verdicts, providing the strongest support to date for the chaos theory.

Adolescent↗

PubMed2004

Group performance and decision making.

Theory and research on small group performance and decision making is reviewed. Recent trends in group performance research have found that process gains as well as losses are possible, and both are frequently explained by situational and procedural contexts that differentially affect motivation and resource coordination. Research has continued on classic topics (e.g., brainstorming, group goal setting, stress, and group performance) and relatively new areas (e.g., collective induction). Group decision making research has focused on preference combination for continuous response distributions and group information processing. New approaches (e.g., group-level signal detection) and traditional topics (e.g., groupthink) are discussed. New directions, such as nonlinear dynamic systems, evolutionary adaptation, and technological advances, should keep small group research vigorous well into the future.

Cognition↗

PubMed2002

Knowledge of partner's ability as a moderator of group motivation gains: an exploration of the Köhler discrepancy effect.

O. Köhler (1926, 1927) found that less able performers tried harder as team members under conjunctive task demands (Kohler motivation gain effect) and that the greatest gain occurred with moderately discrepant coworker abilities (Köhler discrepancy effect). Recent investigations have reproduced Köhler's overall motivation gain but not the discrepancy effect. The present research examined whether workers' foreknowledge of task abilities--present in Kohler's research, absent in contemporary studies--moderates the discrepancy effect. Participants worked alone or in 2-person teams under conjunctive task demands. Experiment 1 manipulated foreknowledge of ability. Experiment 2 manipulated discrepancy: a (confederate) teammate performed slightly, moderately, or substantially better. Both experiments found (a) overall motivation gains and (b) discrepancy moderation under foreknowledge conditions. Implications for understanding group motivation gains are discussed.

Adult↗

PubMed2002

"Me versus just us versus us all" categorization and cooperation in nested social dilemmas.

In its generic form, a social dilemma poses a conflict between private and collective interests. People are often faced, however, with a conflict between private, (sub)group, and collective interests. This study examines participants' simultaneous weighing of these 3 nested interests. The results show that increasing the salience of social categorization of any level of the hierarchy (i.e., 6 individuals, 2 subgroups. 1 collective) increases participants' concern for and contributions to the corresponding level of interest (Experiment 1). One can promote concern for and contributions to the collective interest, which are lowest under categorization as 2 subgroups, by individuating the members of the individuals' own subgroup and/or the opposing subgroup (Experiment 2) and by cross-categorization with the opposing subgroup (Experiment 3).

Analysis of Variance↗

PubMed2002

Satisficing in hypothesis generation.

Research in hypothesis generation suggests that people might act as satisficers and be less likely to generate plausible alternative hypotheses when they already have a hypothesis that accounts for the data in hand. Three experiments simulated scientific hypothesis development. In all 3, participants who had been given a hypothesis consistent with available data generated proportionally fewer of the simplest alternative hypotheses than participants given no such satisficing hypothesis. Furthermore, participant satisficing occurred regardless of whether the provided hypothesis was generated a priori or post hoc and despite high incentives for completeness. Limitations and implications of these findings are discussed for hypothesis development and the practice of taking post hoc hypotheses suggested by one's results and presenting them as a priori hypotheses.

Humans↗