Cues to deception.

Do people behave differently when they are lying compared with when they are telling the truth? The combined results of 1,338 estimates of 158 cues to deception are reported. Results show that in some ways, liars are less forthcoming than truth tellers, and they tell less compelling tales. They also make a more negative impression and are more tense. Their stories include fewer ordinary imperfections and unusual contents. However, many behaviors showed no discernible links, or only weak links, to deceit. Cues to deception were more pronounced when people were motivated to succeed, especially when the motivations were identity relevant rather than monetary or material. Cues to deception were also stronger when lies were about transgressions. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

The effects of task and method of stimulus presentation on the detection of deception.

In a detection of deception experiment comparisons were made of the effects of 2 methods of stimulus presentation and 2 different subject tasks. The relevant-irrelevant method of stimulus presentation proved equally effective for both tasks, but the peak-of-tension method was significantly less effective where the S's task was to deceive as to the nature of guilty information possessed (guilty information paradigm) than it was where the task was to deceive as to the possession of any information (guilty person paradigm). In general, Ss found it easier to deceive in the guilty information paradigm, where they could attempt to "appear guilty" on a noncritical item and especially when they could anticipate the order of presentation of items (peak-of-tension method). (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Effects of perceived role and role success on the detection of deception.

75 college students participated in a detection of deception experiment designed to investigate conflicting results regarding the effect on the rate of detection of a preinterrogation demonstration of the polygraph's accuracy. It was hypothesized that the differences were due to differential demand characteristics in the 2 experiments. The information S received between Trials I and II and S's perception of his role were the major independent variables. If Ss received information which was consonant with their perceived roles, they were detected significantly less frequently than Ss who received information not consonant with their roles. The findings conform to the "consequences theory of detection" and support the hypothesized explanation of the disparate results. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Electroconvulsive shocks exacerbate the heightened acoustic startle response in stressed rats.

Electroconvulsive therapy (ECT) has been successfully used in the treatment of depression, particularly when the illness is refractory to pharmacological therapy. A recent study has shown that ECT is also effective in reducing both depressive and posttraumatic stress disorder (PTSD) symptoms in patients with major depression (MDD) and co-occurring PTSD. This raises the possibility that ECT might be effective in the treatment of PTSD, a disease whose prevalence has increased substantially in recent years. A characteristic symptom of PTSD is an exaggerated reactivity to startling sounds (acoustic startle response; ASR). In the present study, we investigated the effects of electroconvulsive shocks (ECS) on the ASR, in a rat model of traumatic stress. The animals were subjected to a restraint/tailshock paradigm and then administered ECS. ASR measurements were obtained at several time points following ECS administration. Although ECS had no effect in control rats, it significantly exacerbated the already potentiated ASR in the stressed group. While ECT may prove to be an effective treatment for certain symptoms of co-occurring MDD/PTSD or PTSD alone, it may exacerbate heightened arousal associated with PTSD. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Individual differences in judging deception: Accuracy and bias.

The authors report a meta-analysis of individual differences in detecting deception, confining attention to occasions when people judge strangers' veracity in real-time with no special aids. The authors have developed a statistical technique to correct nominal individual differences for differences introduced by random measurement error. Although researchers have suggested that people differ in the ability to detect lies, psychometric analyses of 247 samples reveal that these ability differences are minute. In terms of the percentage of lies detected, measurement-corrected standard deviations in judge ability are less than 1%. In accuracy, judges range no more widely than would be expected by chance, and the best judges are no more accurate than a stochastic mechanism would produce. When judging deception, people differ less in ability than in the inclination to regard others' statements as truthful. People also differ from one another as lie- and truth-tellers. They vary in the detectability of their lies. Moreover, some people are more credible than others whether lying or truth-telling. Results reveal that the outcome of a deception judgment depends more on the liar's credibility than any other individual difference. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Listening, not watching: Situational familiarity and the ability to detect deception.

In 4 experiments, the authors investigated the influence of situational familiarity with the judgmental context on the process of lie detection. They predicted that high familiarity with a situation leads to a more pronounced use of content cues when making judgments of veracity. Therefore, they expected higher classification accuracy of truths and lies under high familiarity. Under low situational familiarity, they expected that people achieve lower accuracy rates because they use more nonverbal cues for their veracity judgments. In all 4 experiments, participants with high situational familiarity achieved higher accuracy rates in classifying both truthful and deceptive messages than participants with low situational familiarity. Moreover, mediational analyses demonstrated that higher classification accuracy in the high-familiarity condition was associated with more use of verbal content cues and less use of nonverbal cues. (PsycINFO Database Record (c) 2011 APA, all rights reserved)     

Effects of biological and social motivation on schizophrenic reaction time.

Reaction times of schizophrenic and normal Ss were determined under instructions to respond as fast as possible to a buzzer signal. Half of the Ss were retested immediately under the same conditions, while the other half were shocked on the responding finger simultaneously with the buzzer. Schizophrenics' RTs improved significantly under shock conditions. Disturbances in schizophrenic RT are "partially accounted for by defective social motivation and… a biological deficit may be involved in the reactions of more chronic schizophrenics." 21 references. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

加温堆浸提金的试验研究

为了解决低温对堆浸喷淋的影响，进行了氰化浸金过程的加温试验研究。实验室试验结果表明，对氰化液加温，温度控制在２０￣８０℃之间，比在１２℃条件下，金的浸出速度可加快一倍。在堆浸实践中，采用电热器对喷淋池中氰化液加温，延长了氰化浸出时间，使最终金浸出率达到６７．７３％。与自然温度条件下相比，金浸出率提高了７．８７％。     

Effects of physical countermeasures on the physiological detection of deception.

In Exp I, 48 undergraduates were divided into 4 groups, 3 of which enacted a mock crime. Two of these guilty groups were trained in the use of a countermeasure, either biting the tongue (pain countermeasure) or pressing the toes against the floor (muscle countermeasure) during the control question zones of the control question test (CQT). All countermeasure Ss were given extensive information about the nature of the CQT. Results show that no significant effects for countermeasures were found. In Exp II, 57 Ss were divided into 3 groups, 2 of which enacted a mock crime, to assess the effects of additional training and concurrent use of both countermeasures. Results show that countermeasure Ss produced 47% false negative outcomes as compared to no false negatives for guilty control Ss. False negative outcomes occurred when Ss were able to produce physiological responses that were larger to control questions than to relevant questions. Findings should be qualified by the possibility that the countermeasure task would be more difficult if the relevant questions dealt with a real crime in an actual investigation. It is concluded that a substantial number of Ss can be trained to defeat a CQT in a laboratory paradigm. (33 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

The effects of real-life motivation on questionnaire response.

400 male omnibus conductor job applicants were given a 2-part personality measure (emotional maladjustment and sociability), 100 each under one of the following 4 conditions: before selection, paper-and-pencil administration; after being notified of selection, paper-and-pencil administration; a box-and-card administration under each of the 2 selection circumstances. The selection circumstances significantly affected the distribution of scores on the emotional maladjustment scale, but not on the sociability scale. Method of administration did not affect the score distributions. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Moderators of nonverbal indicators of deception: A meta-analytic synthesis.

In many legal proceedings, fact finders scrutinize the demeanor of a defendant or witness, particularly his or her nonverbal behavior, for indicators of deception. This meta-analysis investigated directly observable nonverbal correlates of deception as a function of different moderator variables. Although lay people and professionals alike assume that many nonverbal behaviors are displayed more frequently while lying, of 11 different behaviors observable in the head and body area, only 3 were reliably associated with deception. Nodding, foot and leg movements, and hand movements were negatively related to deception in the overall analyses weighted by sample size. Most people assume that nonverbal behaviors increase while lying; however, these behaviors decreased, whereas others showed no change. There was no evidence that people avoid eye contact while lying, although around the world, gaze aversion is deemed the most important signal of deception. Most effect sizes were found to be heterogeneous. Analyses of moderator variables revealed that many of the observed relationships varied as a function of content, motivation, preparation, sanctioning of the lie, experimental design, and operationalization. Existing theories cannot readily account for the heterogeneity in findings. Thus, practitioners are cautioned against using these indicators in assessing the truthfulness of oral reports. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Physique and motivation.

In accordance with the large collection of research findings on n Ach published by McClelland and his associates, it was hypothesized that mesomorphy would correlate positively with n Ach. Ss were 100 nondelinquent and 100 delinquent boys with a mean of 17? yr. They were somatotyped following, not Sheldon's, but Parnell's more recent and objective method. They also took the test that McClelland has used in various countries for measuring n Ach as well as other kinds of motivation. A positive and significant correlation between mesomorphy and n Ach was obtained in both samples as well as a negative and significant correlation between ectomorphy and n Ach. Other types of motivation were also studied. (20 ref.) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Review of Detecting malingering and deception: Forensic distortion analysis.

Reviews the book, Detecting malingering and deception: Forensic distortion analysis by Harold V. Hall and Joseph G. Poirer (see record 2001-18575-000). Therapists who often see clients presenting with posttraumatic stress disorder, memory difficulties, substance abuse questions, and potential-for-harm (to self or others) problems can benefit from this text. It is interesting, given their orientation to the field of malingering and deception, that the authors do not dwell specifically on the issues of treatment as such. Instead, they address the concerns of therapists genetically at first, remarking on the assumptions often made about clients by clinicians, and then more specifically, in the context of various forensic topics. Hall and Poirier unfold their approach without rancor toward other clinicians or toward clients, and they do much to rectify the stuffy, over litigious image of forensic psychology in their humane and sensible stance. They do a marked service by reassuring therapists generally that forensic science need not mean decimation of the patient or the therapeutic relationship; in the process of seeking the truth, forensic specialists do not have to abandon decency. The reviewer recommends this carefully written and thorough text to all therapists who may themselves be drawn, or see clients who may be drawn, into the forensic arena. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

The detection of deception.

Notes that the review by J. A. Podlesny and D. C. Raskin (see record 1978-07412-001) conveys the impression that the lie detector test is already highly accurate and that addition of other response variables might enhance its validity even further. It is argued here that this impression is erroneous and dangerously misleading. The polygraph (lie detector) test has an accuracy of 64–71% (against a chance expectancy of 50%) when the polygraph charts are scored blindly and are thus uninfluenced by clinical impressions of the S or of the evidence against him. The lie test is biased against truthful Ss, at least half of whom will be erroneously classified as deceptive. These conclusions, based on 2 recent studies of lie test validity in real-life applications, corroborate an earlier critical analysis of the assumptions on which the lie detector is based. Since, in the field, most Ss tend to "fail" the lie test whether they are truthful or deceptive, the method more often detects lying than it does truthful responding. However, it seems probable that deceptive Ss could be taught to artificially augment their polygraph responses to the so-called control questions and thus avoid being scored as deceptive. (8 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Individual differences in judging deception: Reply to O'Sullivan (2008) and Pigott and Wu (2008).

C. F. Bond and B. M. DePaulo (see record 2008-08177-001) reported a quantitative synthesis of individual differences in judging deception. Here, the authors respond to a pair of commentaries on this synthesis: a statistical critique by T. D. Pigott and M. J. Wu (see record 2008-08177-003)and a narrative reaction by M. O'Sullivan (see record 2008-08177-002). In response to suggestions made by Pigott and Wu, the authors conduct several alternative analyses of individual differences in judging deception. Without exception, these yield results similar to those that the authors reported earlier. In response to O'Sullivan's questions, the authors point to their meta-analyses of relevant moderator variables. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Effects of confidence and motivation on susceptibility to informational social influence.

"The general hypothesis… was that the individual's acceptance of the judgments of others varies as function of: (a) the relative confidence he has in his own judgment; and (b) his motivational orientation toward the task with which he was confronted… . conformity (as measured through a modified Crutchfield apparatus) was found to: (a) increase as the subjective probability that S was receiving information from the others increased; and (b) decrease as the frequency of errors made by the 'majority' increased. Motivational effects induced by the instruction that the task reflected the individual's intelligence resulted in a decrease in… [errors]." (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Social and sexual motivation in the mouse.

Does a sexual encounter have reward value for a learned operant response? Ovariectomized female mice with or without estradiol replacement were trained to perform a bar-contact operant response for either male or female targets. Response rates of females with estradiol replacement did not differ from those of females without estradiol replacement or females responding for access to females. Reflexive receptive sexual behavior remained responsive to estradiol replacement. Experiment 2 demonstrated that socially isolated females would respond faster for access to a female target than when group housed. Finally, the oxytocin blocker, atosiban, reduced both operant and reflexive social behavior. These results converge on the conclusion that the operant reward value of social and sexual contact is primarily social. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Review of Clinical assessment of malingering and deception, 3rd edition.

Reviews the book, Clinical assessment of malingering and deception, 3rd edition by Richard Rogers (see record 2008-09622-000). Over the past 10 years, psychologists who have been engaged in clinical assessment or evaluation have become more sensitised to the fact that client variables such as noncredible performance can substantially interfere with accurate evaluation and interpretation of obtained psychological or neuropsychological test scores. The chapters in this book clearly indicate that noncredible performance and deception are common in many assessment populations, that it is difficult if not impossible to always obtain accurate information when relying on self-report data, and that objective methods exist to enhance detection of noncredible responding. The first two chapters were written by Rogers himself and set the conceptual framework for the entire text. The book is then divided into four additional sections, with chapters provided by some of the best known names in malingering and defensiveness research. In Section II, specific diagnostic issues are considered, leading with an overview of symptoms associated with deception. Section III discusses psychometric methods to assess response styles. Section IV deals with specialised methods of detection and will likely be of interest to a very limited number of psychologists working in specific fields such as corrections or forensics. Section V deals with specialised applications, including deception in children and adolescents, forensic examinations, and assessment of law enforcement personnel. Overall, this is an excellent reference book, and it certainly provides enough specific, clinically relevant information in the four chapters that flank the book to give most clinicians a good summary of the issues, available instruments, and research findings to date. The chapters dealing with specific diagnostic issues and specialised methods are likely to be referenced heavily by those who work in these specific fields and might provide a good theoretical base for individuals still in the process of clinical training. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

The effect of aroused motivation on attitudes.

"The present experiment is an attempt to determine whether attitudes can be changed by intensifying consequences. A number of academic situations were chosen as the attitude 'objects' and their perceived relation to making good grades was determined. Then an effort was made to arouse the goal of making good grades by the device of testing immediately after a quiz had been given (arousal condition), on the assumption that the motive of achieving grades is activated more strongly on such an occasion than on an ordinary class day (neutral condition)." The attempts were successful. From Psyc Abstracts 36:02:2GD63P. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Effects of actual deception and suspiciousness of deception on interpersonal perceptions.

36 undergraduate "interviewers" each interviewed an introverted and an extraverted "applicant," as assessed by the Eysenck Personality Inventory. One of the applicants acted honestly, the other dishonestly (i.e., extraverts presented themselves as introverts and introverts presented themselves as extraverts). Interviewers were either naive or primed to expect the possibility that deception might be occurring. Primed interviewers were not more accurate than naive interviewers in detecting deception or in discerning applicants' true dispositions. However, the primed interviewers were less confident about their judgments, and they tended to perceive all applicants as more deceptive than did the naive interviewers. Applicants who were interviewed by primed interviewers felt somewhat less successful in their attempts to portray their intended impressions (even though they really were not less successful), and they perceived their interviewers as more manipulative. In the dishonest interviews, the correspondence between the applicants' and the interviewers' perceptions of the interview, and of each other, was significantly lower than in the honest interviews. (27 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)