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1.
Eur. j. psychol. appl. legal context (Internet) ; 12(1): 23-34, ene.-jun. 2020. tab
Artigo em Inglês | IBECS-Express | ID: ibc-ET1-4540

RESUMO

In a countermeasures experiment, we examined to what extent liars who learn about the Model Statement tool and about the proportion of complications (complications/complications + common knowledge details + self-handicapping strategies) can successfully adjust their responses so that they sound like truth tellers. Truth tellers discussed a trip they had made; liars fabricated a story. Participants were of Lebanese, Mexican, and South-Korean origin. Prior to the interview they did or did not receive information about (i) the working of the Model statement and (ii) three types of verbal detail: complications, common knowledge details and self-handicapping strategies. We found no evidence that liars sounded like truth tellers after being informed about the Model Statement and/or types of detail we examined. Actually, veracity differences were similar across experimental conditions, with truth tellers reporting more detail and more complications and obtaining a higher proportion of complications score than liars


En un experimento de contramedidas examinamos hasta qué punto los mentirosos que reciben información sobre la Declaración modelo y la proporción de complicaciones que presenta (complicaciones / complicaciones + detalles de conocimiento general + estrategias de autoobstaculización) pueden ajustar sus respuestas con éxito para que parezca que dicen la verdad. Los que dicen la verdad declararon sobre un viaje que habían hecho; los mentirosos inventaron una historia. Los participantes eran de origen libanés, mexicano y surcoreano. Antes de la entrevista habían recibido o no información sobre (i) el funcionamiento de la Declaración modelo y (ii) tres tipos de detalles verbales: complicaciones, detalles de conocimiento general y estrategias de autoobstaculización. No encontramos evidencia de que los mentirosos se parecieran a los que dicen la verdad después de ser informados sobre la Declaración modelo y los tipos de detalle que examinamos. En realidad, las diferencias de veracidad fueron semejantes en todas las condiciones experimentales: los que decían la verdad informaron con mayor detalle y de más complicaciones y obtuvieron una mayor puntuación en la proporción de complicaciones que los mentirosos

2.
Acta Psychol (Amst) ; 204: 103020, 2020 Jan 31.
Artigo em Inglês | MEDLINE | ID: mdl-32014621

RESUMO

The application of alibi witness scenarios to deception detection has been overlooked. Experiment 1 was a study of the verifiability approach in which truth-telling pairs completed a mission together, whereas in lying pairs one individual completed this mission alone and the other individual committed a mock theft. All pairs were instructed to convince the interviewer that they completed the mission together by writing individual statements on their own followed by a collective statement together as a pair. In the individual statements, truth-telling pairs provided more checkable details that demonstrated they completed the mission together than lying pairs, whereas lying pairs provided more uncheckable details than truth-telling pairs. The collective statements made truth-telling pairs provide significantly more checkable details that demonstrated they were together in comparison to the individual statements, whereas no effect was obtained for lying pairs. Receiver Operating Characteristic curves revealed high accuracy rates for discriminating between truths and lies using the verifiability approach across all statement types. Experiment 2 was a lie detection study whereby observers' abilities to discriminate between truths and lies using the verifiability approach were examined. This revealed that applying the verifiability approach to collective statements improved observers' ability to accurately detect deceit. We suggest that the verifiability approach could be used as a lie detection technique and that law enforcement policies should consider implementing collective interviewing.

3.
Acta Psychol (Amst) ; 200: 102935, 2019 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-31715443

RESUMO

Truth tellers provide less detail in delayed than in immediate interviews (likely due to forgetting), whereas liars provide similar amounts of detail in immediate and delayed interviews (displaying a metacognitive stability bias effect). We examined whether liar's flawed metacognition after delays could be exploited by encouraging interviewees to provide more detail via a Model Statement. Truthful and deceptive participants were interviewed immediately (n = 78) or after a three-week delay (n = 78). Half the participants in each condition listened to a Model Statement before questioning. In the Immediate condition, truth tellers provided more details than liars. This pattern was unaffected by the Model Statement. In the Delayed condition, truth tellers and liars provided a similar amount of detail in the Model Statement-absent condition, whereas in the Model Statement-present condition, liars provided more details than truth tellers.

4.
Sci Rep ; 9(1): 8724, 2019 Jun 19.
Artigo em Inglês | MEDLINE | ID: mdl-31217488

RESUMO

The Forced Choice Test (FCT) can be used to detect malingered loss of memory or sensory deficits. In this test, examinees are presented with two stimuli, one correct and one incorrect, in regards to a specific event or a perceptual discrimination task. The task is to select the correct answer alternative, or guess if it is unknown. Genuine impairment is associated with test scores that fall within chance performance. In contrast, malingered impairment is associated with purposeful avoidance of correct information, resulting in below chance performance. However, a substantial proportion of malingerers intentionally randomize their responses, and are missed by the test. Here we examine whether a 'runs test' and a 'within test response 'bias' have diagnostic value to detect this intentional randomization. We instructed 73 examinees to malinger red/green blindness and subjected them to a FCT. For half of the examinees we manipulated the ambiguity between answer alternatives over the test trials in order to elicit a response bias. Compared to a sample of 10,000 cases of computer generated genuine performance, the runs test and response bias both detected malingered performance better than chance.

5.
Front Psychiatry ; 9: 492, 2018.
Artigo em Inglês | MEDLINE | ID: mdl-30356902

RESUMO

We have been reliably informed by practitioners that police officers and intelligence officers across the world have started to use the Model Statement lie detection technique. In this article we introduce this technique. We describe why it works, report the empirical evidence that it works, and outline how to use it. Research examining the Model Statement only started recently and more research is required. We give suggestions for future research with the technique. The Model Statement technique is one of many recently developed verbal lie detection methods. We start this article with a short overview of the-in our view- most promising recent developments in verbal lie detection before turning our attention to the Model Statement technique.

6.
Law Hum Behav ; 41(6): 519-529, 2017 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-28726439

RESUMO

Research examining how truth tellers' and liars' verbal behavior is attenuated as a function of delay is largely absent from the literature, despite its important applied value. We examined this factor across 2 studies in which we examined the effects of a hypothetical delay (Experiment 1) or actual delay (Experiment 2) on liars' accounts. In Experiment 1-an insurance claim interview setting-claimants either genuinely experienced a (staged) loss of a tablet device (n = 40) or pretended to have experienced the same loss (n = 40). Truth tellers were interviewed either immediately after the loss (n = 20) or 3 weeks after the loss (n = 20), whereas liars had to either pretend the loss occurred either immediately before (n = 20) or 3 weeks before (n = 20) the interview (i.e., hypothetical delay for liars). In Experiment 2-a Human Intelligence gathering setting-sources had to either lie (n = 50) or tell the truth (n = 50) about a secret video they had seen concerning the placing of a spy device. Half of the truth tellers and liars where interviewed immediately after watching the video (n = 50), and half where interviewed 3-weeks later (n = 50; i.e., real delay for liars). Across both experiments, truth tellers interviewed after a delay reported fewer details than truth tellers interviewed immediately after the to-be-remembered event. In both studies, liars failed to simulate this pattern of forgetting and reported similar amounts of detail when interviewed without or after a delay, demonstrating a stability bias in reporting. (PsycINFO Database Record


Assuntos
Decepção , Comportamento Verbal , Adolescente , Adulto , Feminino , Humanos , Entrevistas como Assunto , Maquiavelismo , Masculino , Pessoa de Meia-Idade , Adulto Jovem
7.
Acta Psychol (Amst) ; 177: 44-53, 2017 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-28477454

RESUMO

We examined how the presence of an interpreter during an interview affects eliciting information and cues to deceit, while using a method that encourages interviewees to provide more detail (model statement, MS). A total of 199 Hispanic, Korean and Russian participants were interviewed either in their own native language without an interpreter, or through an interpreter. Interviewees either lied or told the truth about a trip they made during the last twelve months. Half of the participants listened to a MS at the beginning of the interview. The dependent variables were 'detail', 'complications', 'common knowledge details', 'self-handicapping strategies' and 'ratio of complications'. In the MS-absent condition, the interviews resulted in less detail when an interpreter was present than when an interpreter was absent. In the MS-present condition, the interviews resulted in a similar amount of detail in the interpreter present and absent conditions. Truthful statements included more complications and fewer common knowledge details and self-handicapping strategies than deceptive statements, and the ratio of complications was higher for truth tellers than liars. The MS strengthened these results, whereas an interpreter had no effect on these results.


Assuntos
Decepção , Comportamento de Busca de Informação/fisiologia , Entrevistas como Assunto/métodos , Detecção de Mentiras , Adolescente , Adulto , Percepção Auditiva , Sinais (Psicologia) , Feminino , Humanos , Linguagem , Masculino , Adulto Jovem
8.
Acta Psychol (Amst) ; 174: 1-8, 2017 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-28088655

RESUMO

PURPOSE: The Verifiability Approach (VA) is verbal lie detection tool that has shown promise when applied to insurance claims settings. This study examined the effectiveness of incorporating a Model Statement comprised of checkable information to the VA protocol for enhancing the verbal differences between liars and truth tellers. METHOD: The study experimentally manipulated supplementing (or withholding) the VA with a Model Statement. It was hypothesised that such a manipulation would (i) encourage truth tellers to provide more verifiable details than liars and (ii) encourage liars to report more unverifiable details than truth tellers (compared to the no model statement control). As a result, it was hypothesized that (iii) the model statement would improve classificatory accuracy of the VA. Participants reported 40 genuine and 40 fabricated insurance claim statements, in which half the liars and truth tellers where provided with a model statement as part of the VA procedure, and half where provide no model statement. RESULTS: All three hypotheses were supported. In terms of accuracy, the model statement increased classificatory rates by the VA considerably from 65.0% to 90.0%. CONCLUSION: Providing interviewee's with a model statement prime consisting of checkable detail appears to be a useful refinement to the VA procedure.


Assuntos
Decepção , Formulário de Reclamação de Seguro , Revisão da Utilização de Seguros , Detecção de Mentiras , Adolescente , Adulto , Feminino , Humanos , Masculino , Adulto Jovem
9.
Appl Cogn Psychol ; 30(5): 768-774, 2016.
Artigo em Inglês | MEDLINE | ID: mdl-30122804

RESUMO

The present experiment examined whether people could be deterred from lying in an online insurance claim setting. A total of 96 participants were asked to submit a theft insurance claim. Reflecting real life, submitting a claim that went beyond the actual costs of the stolen items was associated with advantages and disadvantages. Two deterrence factors were introduced: asking claimants to provide evidence that they actually owned the stolen items (Evidence Instruction, often used by insurers) and asking participants to read out before starting to submit the claim that they will be truthful (Honesty Statement, not often used by insurers). We also examined at what stage of the interview claimants embedded their lies in their otherwise truthful stories. The honesty statement but not the evidence instruction made claimants more honest, and participants lied more as the interview progressed.

10.
Law Hum Behav ; 35(1): 40-8, 2011 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-21061052

RESUMO

We tested the accuracy of thermal imaging as a lie detection tool in airport screening. Fifty-one passengers in an international airport departure hall told the truth or lied about their forthcoming trip in an interview. Their skin temperature was recorded via a thermal imaging camera. Liars' skin temperature rose significantly during the interview, whereas truth tellers' skin temperature remained constant. On the basis of these different patterns, 64% of truth tellers and 69% of liars were classified correctly. The interviewers made veracity judgements independently from the thermal recordings. The interviewers outperformed the thermal recordings and classified 72% of truth tellers and 77% of liars correctly. Accuracy rates based on the combination of thermal imaging scores and interviewers' judgements were the same as accuracy rates based on interviewers' judgements alone. Implications of the findings for the suitability of thermal imaging as a lie detection tool in airports are discussed.


Assuntos
Aviação , Detecção de Mentiras , Programas de Rastreamento/métodos , Termografia/métodos , Adolescente , Adulto , Feminino , Humanos , Entrevistas como Assunto , Masculino , Pessoa de Meia-Idade , Gestão da Segurança , Temperatura Cutânea , Reino Unido , Adulto Jovem
11.
Acta Psychol (Amst) ; 134(3): 323-9, 2010 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-20398882

RESUMO

We examined the efficacy of a new approach to detect truths and lies in expressing opinions: the Devil's Advocate approach. Interviewees are first asked an opinion eliciting question that asks participants to argue in favour of their personal view. This is followed by a Devil's Advocate question that asks participants to argue against their personal view. People normally think more about reasons that support rather than oppose their opinion. Therefore we expected truth tellers to provide more information and shorter latency times in their responses to the opinion eliciting question than to the Devil's Advocate question. Liars are expected to reveal the opposite pattern as the Devil's Advocate question is more compatible with their beliefs than is the opinion eliciting question. In Experiment 1, we interviewed seventeen truth tellers and liars via the Devil's Advocate approach and measured the difference in number of words and latency times to the two questions. Our hypotheses were supported. In Experiment 2, 25 observers were shown these interviews, and made qualitative judgements about the statements. Truth tellers' opinion eliciting answers were seen as more immediate and plausible and revealed more emotional involvement than their Devil's Advocate answers. No clear differences emerged in liars' answers to the two types of question. We conclude that the Devil's Advocate approach is a promising lie detection approach that deserves attention in future research.


Assuntos
Decepção , Detecção de Mentiras/psicologia , Tempo de Reação/fisiologia , Adulto , Análise de Variância , Feminino , Humanos , Entrevistas como Assunto , Masculino , Inquéritos e Questionários
12.
Law Hum Behav ; 33(2): 159-66, 2009 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-18523881

RESUMO

We hypothesised that the responses of pairs of liars would correspond less with each other than would responses of pairs of truth tellers, but only when the responses are given to unanticipated questions. Liars and truth tellers were interviewed individually about having had lunch together in a restaurant. The interviewer asked typical opening questions which we expected the liars to anticipate, followed by questions about spatial and/or temporal information which we expected suspects not to anticipate, and also a request to draw the layout of the restaurant. The results supported the hypothesis, and based on correspondence in responses to the unanticipated questions, up to 80% of liars and truth tellers could be correctly classified, particularly when assessing drawings.


Assuntos
Entrevistas como Assunto , Detecção de Mentiras , Direito Penal , Feminino , Humanos , Masculino
13.
Acta Psychol (Amst) ; 129(1): 1-7, 2008 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-18504035

RESUMO

Previous research has shown that suspects in real-life interviews do not display stereotypical signs of nervous behaviours, even though they may be experiencing high detection anxiety. We hypothesised that these suspects may have experienced cognitive load when lying and that this cognitive load reduced their tonic arousal, which suppressed signs of nervousness. We conducted two experiments to test this hypothesis. Tonic electrodermal arousal and blink rate were examined during task-induced (Experiment 1) and deception-induced cognitive load (Experiment 2). Both increased cognitive difficulty and deception resulted in decreased tonic arousal and blinking. This demonstrated for the first time that when lying results in heightened levels of cognitive load, signs of nervousness are decreased. We discuss implications for detecting deception and more wide-ranging phenomena related to emotional behaviour.


Assuntos
Nível de Alerta , Atenção , Crime/psicologia , Detecção de Mentiras , Reconhecimento Visual de Modelos , Adolescente , Adulto , Piscadela , Feminino , Resposta Galvânica da Pele , Humanos , Controle Interno-Externo , Psicofísica , Pensamento
14.
Law Hum Behav ; 32(3): 253-65, 2008 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-17694424

RESUMO

In two experiments, we tested the hypotheses that (a) the difference between liars and truth tellers will be greater when interviewees report their stories in reverse order than in chronological order, and (b) instructing interviewees to recall their stories in reverse order will facilitate detecting deception. In Experiment 1, 80 mock suspects told the truth or lied about a staged event and did or did not report their stories in reverse order. The reverse order interviews contained many more cues to deceit than the control interviews. In Experiment 2, 55 police officers watched a selection of the videotaped interviews of Experiment 1 and made veracity judgements. Requesting suspects to convey their stories in reverse order improved police observers' ability to detect deception and did not result in a response bias.


Assuntos
Cognição , Decepção , Rememoração Mental , Detecção de Sinal Psicológico , Adulto , Sinais (Psicologia) , Feminino , Humanos , Masculino , Comunicação não Verbal , Revelação da Verdade
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