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Results for “Lie Detection”

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PubMed1978

The bogus pipeline as lie detector: two validity studies.

The validity of the bogus pipeline procedure for eliciting truthful responses from subjects in social psychological experiments was tested in two studies. Subjects were illegitimately informed about how to perform well on an experimental test, were tested, and then were asked whether they had possessed this prior information. As compared to subjects responding to pencil-and-paper questions or face-to-face questionning by the experimenter, those in a bogus pipeline condition confessed more often.

Electromyography↗
PubMed1985

Volitional experiences associated with breaching posthypnotic amnesia.

Highly responsive hypnotic subjects classified as having control over remembering (voluntaries) or not having control over remembering (involuntaries) during posthypnotic amnesia were compared during posthypnotic recall. Subjects rerated their voluntariness after the experiment. Two contextual conditions were employed (2 X 2 design): a lie detector condition meant to create pressure to breach amnesia and a relax control condition. In contrast to earlier findings, the recall data showed that both voluntary and involuntary subjects breached under the lie detector condition compared with their counterparts in the relax condition; however, the degree of breaching was not great in any condition. The results are discussed as they relate to studies attempting to breach posthypnotic amnesia and characteristics of the voluntary-involuntary dimension.

Amnesia↗
PubMed1992

Fishy-looking liars: deception judgment from expectancy violation.

To explain how people judge that others are lying, an expectancy-violation model is proposed. According to the model, deception is perceived from nonverbal behavior that violates normative expectation. To test the model, 3 experiments were conducted, 2 in the United States and 1 in India. In each experiment, people described acquaintances while exhibiting weird nonverbal behaviors, such as arm raising, head tilting, and staring. Other Ss watched the videotapes of the descriptions and made deception judgments. Consistent with the expectancy-violation model, both American undergraduates and Indian illiterates inferred deception from weird behaviors. Implications of the model are discussed.

Adult↗
PubMed1995

Bioelectrical echoes from evaluative categorization: II. A late positive brain potential that varies as a function of attitude registration rather than attitude report.

We report evidence of both correspondence and independence between participants' attitude report and a late positive potential (LPP) of the event-related potential. Attitude reports and LPPs to positive, neutral, and negative stimuli that were preceded by positive stimuli were recorded while participants either reported accurately their attitudes or misreported neutral or negative attitudes. Evaluatively inconsistent, in contrast to consistent, stimuli evoked a larger LPP regardless of whether participants reported accurately or misreported their attitudes. These results were replicated in a second study in which attitude reports and LPPs to negative, neutral, and positive stimuli that were preceded by negative stimuli were recorded. Findings suggest that the LPP evoked during evaluative judgments reflects attitude categorization rather than attitude report processes and can potentially assess attitudes that people are unwilling to report.

Adult↗
PubMed2000

Allegations of wrongdoing: the effects of reinforcement on children's mundane and fantastic claims.

S. Garven, J. M. Wood, R. S. Malpass, and J. S. Shaw (1998) found that the interviewing techniques used in the McMartin Preschool case can induce preschool children to make false allegations of wrong doing against a classroom visitor. In this study, 2 specific components of the McMartin interviews, reinforcement and cowitness information, were examined more closely in interviews of 120 children, ages 5 to 7 years. Children who received reinforcement made 35% false allegations against a classroom visitor, compared with 12% made by controls. When questioned about "fantastic" events (e.g., being taken from school in a helicopter), children receiving reinforcement made 52% false allegations, compared with 5% made by controls. In a second interview, children repeated the allegations even when reinforcement had been discontinued. The findings indicate that reinforcement can swiftly induce children to make persistent false allegations of wrong doing.

Child↗
PubMed2004

Comparison of polygraph data obtained from individuals involved in mock crimes and actual criminal investigations.

In a preliminary attempt to determine the generalizability of data from laboratory mock-crime studies, the authors examined the similarities and differences among the cardiovascular, electrodermal, and respiration responses of deceptive and nondeceptive individuals elicited to crime-relevant and crime-irrelevant questions. Participants in the laboratory group were randomly assigned to nondeceptive (n = 28) or deceptive (n = 27) treatment groups, and a mock-crime scenario was used. The field participants were confirmed nondeceptive (n = 28) or deceptive (n = 39) criminal suspects who underwent polygraph examinations between 1993 and 1997. The results indicated that there were salient differences between field and similarly obtained laboratory polygraph response measures. However, accuracy of laboratory participants' classifications using logistic regression analysis was not significantly different from field participants' classification accuracy.

Adolescent↗
PubMed2004

A replication study of the neural correlates of deception.

The authors attempted to replicate prior group brain correlates of deception and improve on the consistency of individual results. Healthy, right-handed adults were instructed to tell the truth or to lie while being imaged in a 3T magnetic resonance imaging (MRI) scanner. Blood oxygen level-dependent functional MRI significance maps were generated for subjects giving a deceptive answer minus a truthful answer (lie minus true) and the reverse (true minus lie). The lie minus true group analysis (n = 10) revealed significant activation in 5 regions, consistent with a previous study (right orbitofrontal, inferior frontal, middle frontal cortex, cingulate gyrus, and left middle frontal), with no significant activation for true minus lie. Individual results of the lie minus true condition were variable. Results show that functional MRI is a reasonable tool with which to study deception.

Adolescent↗
PubMed1967

The polygraph.

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Electrophysiology↗
PubMed2003

Mind readers.

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Brain↗
PubMed1998

Differential gene expression in Arabidopsis monitored using cDNA arrays.

Large numbers of genes are being discovered on a daily basis for a variety of organisms including Arabidopsis thaliana. To obtain more functional information on these genes, efficient expression monitoring methods need to be developed. In this report we studied the steady-state mRNA levels of over 800 Arabidopsis genes in parallel using high-density arrays of partially sequenced cDNA. The technology is simple and robust and reliably permits the detection of down to twofold variation in mRNA levels. The detection limit lies below 0.01% of the total mRNA population. The comparison of the profiles obtained for light-grown and dark-grown seedlings revealed significant variations in mRNA levels for about 16% of the cDNA investigated. This technology not only provides new functional information on anonymous genes, and thus may guide reverse-genetics approaches, but also constitutes a powerful tool for global gene expression studies, with many potential applications in plant biology.

Arabidopsis↗