Eyewitness persuasion: How and how well do fact finders judge the accuracy of adults' and children's memory reports?

Children (aged 5–6 and 9–10 yrs) and adults participated in an eventful laboratory session and provided memory reports of the session. In 3 experiments, college students and parents viewed videotapes of highly accurate and highly inaccurate reports. In 2 experiments, these "fact finders" rated adult witnesses more believable and accurate than younger child witnesses, even when both groups were equally accurate. Perceptions of confidence and consistency mediated credibility judgments. Accurate witnesses were judged more believable and accurate than inaccurate witnesses. Higher perceived confidence, longer free recall, and fewer memory failure admissions were associated with more accurate adult memory reports. Fact finders overused confidence and underused the other cues in achieving modest accuracy discernment. The results suggest how strong and weak memory reports differ and how fact finders may learn to differentiate them. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Physiological arousal, dissonance, and attitude change: Evidence for a dissonance-arousal link and a "Don't remind me" effect.

Two experiments, with 80 undergraduates, replicated and extended research by R. T. Croyle and J. Cooper (see record 1984-11595-001) indicating that cognitive dissonance involves physiological arousal. In Exp I, Ss wrote counterattitudinal essays under conditions of high or low choice and, to assess arousal effects owing to effort, with or without a list of arguments provided by the experimenter. In high-choice conditions only and regardless of effort, Ss showed both arousal (heightened galvanic skin response) and attitude change. Arousal, however, did not decline following attitude change. The more effortful task (no arguments provided) produced increased arousal but not greater attitude change. In Exp II, the opportunity to change one's attitude following a freely chosen counterattitudinal essay was manipulated. As in Exp I, arousal increased following the essay but did not decline following a postessay attitude change opportunity. When Ss were not given an attitude change opportunity, however, arousal did decline. It is suggested that if dissonance is a drive state, drive reduction typically may be accomplished through gradual cognitive change or forgetting. (47 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

In search of reliable persuasion effects: II. Associative interference and persistence of persuasion in a message-dense environment.

Conducted 3 experiments, with a total of 272 Ss, to test an associative learning model. Fictitious consumer-product brands were used as stimuli and brand evaluations as responses. In each experiment, Ss received messages concerning up to 54 brands drawn from up to 12 product categories. Exp I demonstrated associative interference—messages advocating diverse evaluations of similar products led to rapid decay of persuasion. Exp II demonstrated reduction of associative interference—messages advocating similar evaluative responses to similar products facilitated associative learning and attenuated decay of persuasion. Exp III demonstrated the correlation between learning of brand-evaluation associations and persuasion. Results suggest that associative learning theory can provide a useful tool for analyzing the persisting impacts of persuasive messages in message-dense environments. (14 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

The case for expert testimony about eyewitness memory.

Eyewitness expert testimony informs a jury about psychological processes and accuracy related variables in eyewitness testimony. Appropriately chosen testimony is not prejudicial, and it is on sound scientific ground. Eyewitness research has established reliable, applicable findings and demonstrated that jurors have insufficient knowledge of some findings and poorly judge eyewitness accuracy. Studies of trial dynamics and reactions to eyewitnesses suggest a sizable risk of inordinate eyewitness impact, creating sizable risk of conviction on the basis of mistaken identifications. Trial simulations examining eyewitness expert testimony indicate it promotes modest, appropriate increases in skepticism about eyewitnesses, even when the expert gives a general overview of research and admits to limitations. The psychological and legal professions should develop responsible guidelines for use of expert testimony in court. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Generalization of dissonance reduction: Decreasing prejudice through induced compliance.

Three studies involving a total of 318 White college students demonstrated that induced compliance can change socially significant attitudes and that the change generalizes to broader beliefs. Ss wrote an essay endorsing a pro-Black policy that was costly to Whites. In Exps 1 and 2, attitudes and general beliefs about Blacks became more favorable in both high- and low-choice conditions, provided publicity of the essay was high. Overall, choice and publicity had additive effects on attitude change. Some high-choice Ss wrote only semipositive (semicompliant) essays and did not change their essay attitudes. Yet their beliefs about Blacks still became more favorable. In Exp 3, racial ambivalence, but not prior attitude, predicted essay compliance. Ambivalent Ss were more likely to comply than were less ambivalent Ss. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

In search of reliable persuasion effects: III. The sleeper effect is dead: Long live the sleeper effect.

The sleeper effect in persuasion is a delayed increase in the impact of a message that is accompanied by a discounting cue. Despite a long history, the sleeper effect has been notoriously difficult to obtain or to replicate, with the exception of a pair of studies by Gruder et al (1978). We conducted 16 computer-controlled experiments and a replication of the Gruder et al study to demonstrate that a sleeper effect can be obtained reliably when Ss (a) note the important arguments in a message, (b) receive a discounting cue after the message, and (c) rate the trustworthiness of the message communicator immediately after receiving the discounting cue. These operations are sufficiently different from those used in earlier studies to justify a new differential decay interpretation of the sleeper effect, in place of the dissociation hypothesis favored by most previous sleeper effect researchers. According to the differential decay interpretation, a sleeper effect occurs when message and discounting cue have opposite and near-equal immediate impacts that are not well-integrated in memory. The effect occurs, then, if the impact of the discounting cue decays faster than that of the message. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Victimization, self-monitoring, and eyewitness identification.

38 undergraduate low self-monitors and 42 undergraduate high self-monitors (as determined by a scale of self-monitoring of expressive behavior) witnessed in small groups a staged crime of either their own wristwatches or a laboratory calculator. Campus police detectives took individual witness statements as if a real crime had occurred, and using biased or unbiased instructions, police administered a suspect-present photospread. Results show that victim witnesses who had been given biased instructions gave the least accurate identifications and that high self-monitoring Ss were least likely to reject the lineup when instructions were biased. (25 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Aziridide-based inhibitors of cathepsin L: synthesis, inhibition activity, and docking studies

A comprehensive screening of N-acylated aziridine (aziridide) based cysteine protease inhibitors containing either Boc-Leu-Caa (Caa=cyclic amino acid), Boc-Gly-Caa, or Boc-Phe-Ala attached to the aziridine nitrogen atom revealed Boc-(S)-Leu-(S)-Azy-(S,S)-Azi(OBn)(2) (18 a) as a highly potent cathepsin L (CL) inhibitor (K(i)=13 nM) (Azy=aziridine-2-carboxylate, Azi=aziridine-2,3-dicarboxylate). Docking studies, which also accounted for the unusual bonding situations (the flexibility and hybridization of the aziridides) predict that the inhibitor adopts a Y shape and spans across the entire active site cleft, binding into both the nonprimed and primed sites of CL.     

Under what conditions does theory obstruct research progress?

Contends that theory entails the risk of overgeneralization and discusses the possibility of avoiding overgeneralizations. It is suggested that researchers display confirmation bias when they persevere by revising procedures until obtaining a theory-predicted result. This strategy produces findings that are overgeneralized in avoidable ways, and this in turn hinders successful applications. (The 40-yr history of an attitude-change phenomenon, the sleeper effect, is used to illustrate the point.) Confirmation bias is an expectable product of theory-centered research strategies, including both the puzzle-solving activity of T. S. Kuhn's (1970) "normal science" and K. R. Popper's (1934 [1959]) recommended method of falsification seeking. The alternative strategies of condition seeking (identifying limiting conditions for a known finding) and design (discovering conditions that can produce a previously unobtained result) are result centered; they are directed at producing specified patterns of data rather than at the logically impossible goals of establishing either truth or falsity of a theory. It is contended that result-centered methods are not atheoretical. Rather, they oblige resourcefulness in using existing theory and can stimulate novel development of theory. (120 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)