Individual differences in the game motives of Own,Relative, and Joint gain

Two hundred and eighteen undergraduates (94 males and 124 females) made decisions in same-sex dyads across four types of 3-choice decomposed games. An analysis of each subject's choices was performed to see if he or she consistently pursued one of the three motives of Own (Individualism), Relative (Competition) or Joint (Cooperation) gain across all four decomposed games. Sixty-six percent of the subjects manifested such consistency, and sex of subject was unrelated to which goal was pursued. Of the remaining 32%, a sizable subgroup ($\text{1}\text{3}$) was shown to be making its choices in an Altruistic fashion, attempting to maximize the outcomes of the other subject. An analysis of variance of the F scale scores of subjects in these motivational categories yielded an effect (p < .025), with the Competitive group having the highest, and the Altruistic group having the lowest mean authoritarianism score. Correlational analyses indicated negative r's between degree of Competition and F score, positive r's between degree of Altruism and F, but no apparent relation between F and either Individualistic or Joint gain choice.     

Frustration and instrumentality of aggression

The influence of two different reinforcers of aggression was investigated: Frustration (intrinsic primary reinforcement) and instrumental value of aggression (extrinsic primary reinforcement). In the first part of the experiment frustration was manipulated on two levels by having the stooge interfere very often or seldom in the ?building a village' task of the subject. In the second part of the study the stooge had to judge distances in traffic while the subject was allowed to give him electrical shocks in order to startle and hinder the stooge in his estimation task. The aggression score of the subject was formed by the number and the intensity of the shocks delivered. Instrumentality of aggression was manipulated on two levels by indicating or not that the subjects could earn more money the more and stronger they shocked their partner. Confirming the predictions, significantly more aggression was expressed when this could lead to earning more money than in those conditions where this was not the case. Also confirming predictions, the impact of instrumentality on aggression was stronger than the influence of frustration. Frustration did not lead to a significant increase in the level of aggression.     

The homosexual in society

This article deals primarily with the social phase of the homosexual. We are now working on articles on two other phases of the problem: an outstanding psychiatrist is preparing one on the psychological dynamics which go into the making of the homosexual, and a hospital chaplain will write another on the contribution the minister can make to the treatment of the problem.     

Der Gestaltbegriff im Lichte der neuen Logik

Ohne Zusammenfassung     

Der Analogiebegriff in der modernen Phyfik

Ohne Zusammenfassung     

The Effect of Backloading Instructions on Eyewitness Identification from Simultaneous and Sequential Lineups

The sequential lineup is multifaceted, including serial presentation of faces, multiple decisions, and often backloading (indicating to an eyewitness that a lineup contains more photos than there actually are). We evaluated the effect of backloading instructions on response bias and sensitivity with an eyewitness identification paradigm. Importantly, we included an ‘undisclosed’ condition that provided no information to participants about the number of lineup members to expect. Experiment 1 (N = 780) tested sequential lineups; Experiment 2 (N = 532) tested simultaneous lineups. As predicted, signal detection analysis showed that backloading induced participants to be more conservative in choosing from both lineup types, but did not affect d′. We conclude that the criminal justice system should be mindful of this shift in response bias, as it has implications for both guilty and innocent suspect identifications. Copyright © 2016 John Wiley & Sons, Ltd.     

The Influence of Perpetrator Exposure Time and Weapon Presence/Timing on Eyewitness Confidence and Accuracy

Crimes can occur in a matter of seconds, with little time available for an eyewitness to encode a perpetrator's face. The presence of a weapon can further exacerbate this situation. Few studies have featured mock crimes of short duration, especially with a weapon manipulation. We conducted an experiment to investigate the impact of weapon presence and short perpetrator exposure times (3 vs. 10 seconds) on eyewitness confidence and accuracy. We found that recall concerning the perpetrator was worse when a weapon was present, replicating the weapon focus effect. However, there was no effect on eyewitness identification accuracy. Calibration analyses revealed that all conditions produced a strong confidence–accuracy relationship. Confidence–accuracy characteristic curves illustrated almost perfect accuracy for suspect identifications at the highest levels of confidence. We conclude that weapon presence during a brief crime does not necessarily result in negative consequences for either eyewitness identification accuracy or the confidence–accuracy relationship. Copyright © 2016 John Wiley & Sons, Ltd.