Vocal and verbal indicators of deception as a function of lie complexity

Abstract

A brief response is made to Eysenck's review of the status of personality factors in relation to criminality. It is respectfully suggested that some aspects of his review be viewed with caution.     

Effectiveness of deception detection training: a meta-analysis

Abstract

A meta-analysis was conducted to determine the overall effectiveness of deception detection training and to identify conditions that may moderate training effectiveness. The analysis was based on a total of 16 studies with 30 separate hypothesis tests, representing the behavior of 2847 trainees. Results indicated that the effect of deception detection training on detection accuracy was positive, significant, and of medium magnitude. Moreover, training effectiveness was moderated by the type of training implemented, training content, trainee expertise, and the type of lie told. Discussion centers on implications for training design and implementation.     

Information does not affect the validity of a comparison question test

Purpose . Detailed information about the comparison question test (CQT) and possible countermeasures are now available on the Internet. This study examined whether the provision of such information would affect the validity of the Test for Espionage and Sabotage, a directed lie variant of the CQT. Method . Forty participants were divided into four equal groups: guilty, guilty informed, innocent, and innocent informed. During a first appointment, participants either did or did not commit a mock crime: then some were provided with a book containing detailed information on the CQT, including possible countermeasures. After 1 week with the book, all participants were administered a CQT during their second appointment. Following the polygraph, participants responded to a questionnaire that asked them about their behaviour and perceptions during their examination. Results . There were no significant effects of providing information on the validity of the CQT. However, the reported use of countermeasures was associated with a lower probability of truthfulness. Results of the debriefing questionnaire were found to support predictions made by the theory of the CQT. Conclusions . Concerns that readily available information will enable guilty individuals to produce false‐negative errors seem unfounded. Moreover, the results actually indicate that the use of countermeasures was associated with a lower probability of truthfulness, which was exactly the opposite outcome predicted by the CQT critics.     

Detecting deception in second‐language speakers

Purpose. We examined whether language proficiency had an impact on lie detection. Methods. We collected video footage of 30 targets who spoke English as their native or second language and who lied or told the truth about a transgression. Undergraduate students (N = 51) then judged the veracity of these 30 clips and indicated how confident they were in their ratings. Results. Participants were more confident when judging native‐language truth‐tellers than second‐language truth‐tellers. In addition, participants were more likely to exhibit a truth‐bias when observing native‐language speakers, whereas they were more likely to exhibit a lie‐bias when viewing second‐language speakers. Conclusions. Given the difficulties and biases associated with second‐language lie detection, further research is needed.     

Believed cues to deception: Judgments in self‐generated trivial and serious situations

Purpose . To investigate the beliefs that people hold about the cues to deception in serious and trivial lies. Method . A questionnaire study considered the beliefs which people have about the cues to deception in themselves and other people in both trivial and serious lies. Participants were asked to consider how likely it was that a number of verbal and non‐verbal behaviours would give themselves or someone else away during deception. Half the participants considered cues to deception in themselves and the remainder considered cues in other people. All participants were asked to make a judgment on cues to deception in both trivial and serious situations. Results . It was predicted that making the consequences of the lie both salient and meaningful to participants would make participants less stereotypical in their beliefs. Results partially supported these hypotheses – serious lies were associated with more nervous behaviours than trivial ones and a total of six behaviours were regarded as occurring significantly less often in trivial lies than in truthful situations. Conclusions . While similar results were found for serious self‐generated lies to those found in previous research using vignettes, there was some suggestion that the use of a more individually salient lying situation did reduce the reliance on stereotyped behaviour. The believed decrease in certain behaviours during trivial lies is a promising result, and these results are discussed with reference to the roles that stereotypes and heuristics play in ineffective lie detection.     

A Randomized Comparative Effectiveness Trial of Two Court‐Connected Programs for High‐Conflict Families

Parents who experience great amounts of legal conflict as they dissolve their relationship and arrive at their parenting arrangements require an outsize proportion of courts’ time and resources. Additionally, there is overwhelming evidence that conflict has a deleterious effect on their children. We partnered with the family court to conduct a study comparing the effectiveness of two programs for families deemed by their judge to be high conflict and thereby mandated to a program. Both involved one 3‐hour session; the existing program, Parent Conflict Resolution (PCR), used exhortational lecture and video; the newly designed experimental program, Family Transitions Guide (FTG), based on motivational interviewing, employed exercises attempting to get parents to decide for themselves what they needed to do for the sake of their children. Parents were assigned at random to one of the two programs (the literature often terms this a randomized clinical trial) and were interviewed just before it began and 9 months later, as was a child. Results showed that child's report of their own well‐being was significantly improved by FTG as compared to PCR and that these effects were mediated by children feeling less caught in the middle. On several variables, parent report showed that parents in PCR as compared to FTG felt decreased problems in co‐parenting and less interparental conflict, although the effects were not consistent across mother and father report. There was also evidence of diminished legal conflict over 9 months in FTG as compared to PCR.     

Effectiveness of a risk–need–responsivity‐based treatment program for violent and sexual offenders: Results of a retrospective,quasi‐experimental study

Purpose

Relapse prevention is an important goal in correctional settings. Although there is strong evidence for the effectiveness of certain treatment programs for juvenile offenders, those for adults lack such evidence. This study evaluated the effectiveness of a risk–need–responsivity (RNR)‐based intervention.

Methods

A quasi‐experimental, observational study design and cox regression analysis were used to compare treated violent and sexual offenders (n = 171) with untreated offenders (n = 241).

Results

Both groups were observed for an average of 7.9 years. Recidivism rates of treated offenders (11.7%, n = 20) were similar to those of control offenders (15.8%, n = 38; p = .25). When controlling for confounding variables, the hazard of recidivism in the treatment group was 5.2% lower than that in the control group. Subdividing the treatment group resulted in lower hazard ratios for offenders still in therapy when released and offenders cancelling therapy. However, none of the group differences was statistically significant.

Conclusion

Our results show that control and RNR‐based treatment groups had comparable recidivism rates with a trend towards a positive treatment effect, especially for people in outpatient treatment. However, criminal history, age at the start of follow‐up, and actuarial risk of recidivism were significantly associated with recidivism. Future research needs to apply elaborate methodological approaches to detect robust treatment effects and consider different criteria of treatment effectiveness. Furthermore, the influence of prison climate, motivational factors, intervention quality, and factors supporting the success of outpatient treatment should be considered in future studies of larger offender samples.     

Effectiveness of Functional Family Therapy for Mandated Versus Non‐Mandated Youth

This study compares the outcomes for youth mandated to participate in Functional Family Therapy (FFT) to those whose participation was referred but voluntary. FFT is a short‐term intervention for delinquents and status offenders, along with their parents. The study sample consists of 120 cases: 70 youth and parents who were mandated by the Family Court to participate in FFT and 50 youth and their parents who were referred to FFT by other agencies. The sample is diverse in terms of gender, race and ethnicity. The outcome variables consist of a set of scales obtained from the Strengths and Needs Assessment (SNA). Changes in life domain functioning, child strengths, acculturation, caregivers' strengths, caregivers' needs, child behavioral emotional needs, and child risk behaviors are assessed. The analysis indicates that both groups improved across all domains. Overall, being mandated to participate in FFT does not predict greater improvements in outcomes. The findings suggest that status offenders and minor delinquents who participated in FFT could be processed less formally without foregoing the therapy outcomes.     

Validation of the 4‐aminophenol color test for the differentiation of marijuana‐type and hemp‐type cannabis

The analysis of cannabis plant material submitted to seized‐drug laboratories was significantly affected by the signing of the Agricultural Improvement Act of 2018, which defined hemp and removed it from the definition of marijuana in the Controlled Substances Act. As a result, field law enforcement personnel and forensic laboratories now are in need of implementing new protocols that can distinguish between marijuana‐type and hemp‐type cannabis. Colorimetric tests provide a cost‐effective and efficient manner to presumptively identify materials prior to submission to a laboratory for analysis. This work presents the validation of the 4‐aminophenol (4‐AP) color test and demonstrates its utility for discriminating between marijuana‐type and hemp‐type cannabis (i.e., typification). Validation studies included the testing of numerous cannabinoid reference materials, household herbs, previously characterized cannabis plant samples, and real‐case samples. The 4‐AP test reliably produces a pink result when the level of Δ⁹‐tetrahydrocannabinol (THC) is approximately three times lower than the level of cannabidiol (CBD). A blue result is generated when the level of THC is approximately three times higher than that of CBD. Inconclusive results are observed when the levels of THC and CBD are within a factor of three from each other, demonstrating the limitations of the test under those scenarios.     

Effectiveness of Single‐Nucleotide Polymorphisms to Investigate Cattle Rustling

Short tandem repeats (STR)s have been the eligible markers for forensic animal genetics, despite single‐nucleotide polymorphisms (SNP)s became acceptable. The technology, the type, and amount of markers could limit the investigation in degraded forensic samples. The performance of a 32‐SNP panel genotyped through OpenArrays^TM (real‐time PCR based) was evaluated to resolve cattle‐specific forensic cases. DNA from different biological sources was used, including samples from an alleged instance of cattle rustling. SNPs and STRs performance and repeatability were compared. SNP call rate was variable among sample type (average = 80.18%), while forensic samples showed the lowest value (70.94%). The repeatability obtained (98.7%) supports the used technology. SNPs had better call rates than STRs in 12 of 20 casework samples, while forensic index values were similar for both panels. In conclusion, the 32‐SNPs used are as informative as the standard bovine STR battery and hence are suitable to resolve cattle rustling investigations.     

Vital parameters for patent morality a question of form

Legal context: At the interface between patent law and biotechnology, a debatehas arisen over the application of the morality provision, designedto ensure the future development of society on a principledbasis. This article reviews the provision in its European context,adopting UK and European perspectives for analysis. Key points: Analysis of the provision identifies that there is ambiguityregarding interpretation of the morality provision, which haslead to inconsistent application between the European PatentOffice and the European Patent Boards. This article assessesthe provision in the context of the patent system and offersa legal philosophy framework within which to understand theprovision as conveying: a methodology, a standard of moralityand a source for that standard which can be utilized to describethe possibilities. It then re-centres the debate to its practicalcontext in order to demonstrate that the patent system removesthe options which are inapplicable: advocating valid and achievablemethods for complying with the law both nationally and on aEuropean level. Practical significance: The morality provision has become an accepted ‘wild card’in assessing the patentability of biotechnology: it has cometo rely upon the identification of danger areas in innovationthat may trigger moral objections. This falls far short of thelegal certainty which is so vital to biotechnological growth.In the face of the impending implementation of the unitary patentright across Europe, the importance of achieving a predictableand practical approach to applying the morality cannot be underestimated.     

The Increasing Effectiveness of National Gender Quotas, 1990–2010

National gender quotas—policies that require a certain percentage of women candidates or legislators—are becoming more effective over time. Using data on 145 countries from 1990 to 2010, we document this trend with latent growth‐curve models. Part of the explanation for increasing effectiveness is that countries have ratcheted up targets for women's inclusion and that quotas are increasingly written in ways that make them more effective at achieving stated goals. Activists, political elites, and policy makers have learned over time which quota policies are most effective, resulting in quotas with provisions that more often lead to success. But, changes in rules alone do not account for the increasing effectiveness of quotas over time. It appears that changing norms about women's incorporation in politics are also increasing quota effectiveness regardless of policy design.     

Estimating postmortem interval for human cadavers in a sub‐tropical climate using UV‐Vis‐near‐infrared Spectroscopy

Estimating postmortem interval (PMI) of surface found skeletal remains is challenging. This novel study used UV‐Vis‐NIR spectroscopy to scan soil collected from cadaver decomposition islands (CDIs) ranging from 15‐ to 963‐d postmortem and control soils. A decomposition product spectra model (DPS model) was constructed by deducting the control soil spectra from the CDI soil spectra for the estimation of postmortem indices: PMI (d), ADD₄, ADD₁₀, and ADD₂₀. The DPS model (n = 55) was calibrated and subjected to a full cross‐validation. Calibration R² and RPD for the DPS model ranged from 0.97 to 0.99 and from 6.1 to 9.9, respectively, for the four postmortem interval indices. Validation R² and RPD for the DPS model ranged from 0.73 to 0.80 and from 1.9 to 2.2, respectively. The DPS model estimated postmortem intervals for three test CDIs in a clay soil under perennial grassland (test set 1; n = 3) and six CDIs in a sandy soil under a loblolly pine forest (test set 2; n = 6). Test set 1 had PMI prediction ranges from ?69 to ?117 days, ?796 to +832 ADD₄, +552 to +2672 ADD₁₀, and ?478 to ?20 ADD₂₀ of observed PMI. Test set 2 PMI prediction ranged from ?198 to ?65 days, ?9923 to +2629 ADD₄, ?6724 to +1321 ADD₁₀, and ?2850 to +540 ADD₂₀ of observed PMI. Test set 2 had poor predictions for two CDIs, for all measures of postmortem indices resulting in discussion of sampling depth, effect of body mass index (BMI), and scavenging.     

Halfe the world knowes not how the other halfe lies: Investigation of verbal and non‐verbal signs of deception exhibited by criminal offenders and non‐offenders

Purpose. This study examined the verbal and non‐verbal behaviours exhibited by criminal offender and non‐offender participants while they related planned truthful and deceptive accounts about emotional autobiographical events. Methods. In a 2 × 2 (participant group × veracity) quasi‐experimental design, offenders (N = 27) and university students (N = 38) provided videotaped accounts of four autobiographical emotional events: two honest and two fabricated (counterbalanced). Patterns of behaviour exhibited during the truthful and the deceptive accounts were then compared. Results. In general, offenders and non‐offenders showed similar patterns of deceptive behaviour. Deceptive accounts by both groups contained fewer details than honest accounts. Deception was associated with an increase in illustrator usage and self‐manipulations; however, univariate analyses indicated only that offenders exhibited significantly more self‐manipulations when lying. A significant interaction emerged in which offenders showed a reduction in smiles when lying about the emotional events, while students showed no difference. Conclusions. Offenders and students showed similar patterns of lying on most cues. However, unlike non‐offenders, offenders smiled less and showed an increase in self‐manipulations when lying. We theorize that offenders may have been aware that smiling and laughing are negatively related to perceived credibility in the speaker and used self‐manipulations to distract listeners from the content of their lies.     

Development of a Library Search‐Based Screening System for 3,4‐Methylenedioxymethamphetamine in Ecstasy Tablets Using a Portable Near‐Infrared Spectrometer

This is the first report on development of a library search‐based screening system for 3,4‐methylenedioxymethamphetamine (MDMA) in ecstasy tablets using a portable near‐infrared (NIR) spectrometer. The spectrum library consisted of spectra originating from standard substances as well as mixtures of MDMA hydrochloride (MDMA‐HCl) and diluents. The raw NIR spectra were mathematically pretreated, and then, a library search was performed using correlation coefficient. To enhance the discrimination ability, the wavelength used for the library search was limited. Mixtures of MDMA‐HCl and diluents were used to decide criteria to judge MDMA‐positive or MDMA‐negative. Confiscated MDMA tablets and medicinal tablets were used for performance check of the criteria. Twenty‐two of 27 MDMA tablets were truly judged as MDMA‐positive. Five false‐negative results may be caused by compounds not included in the library. No false‐positive results were obtained for medicinal tablets. This system will be a useful tool for on‐site screening of MDMA tablets.     

The association between investigative interviewers' knowledge of question type and adherence to best‐practice interviewing

It is well established that not all investigative interviewers adhere to ‘best‐practice’ interview guidelines (i.e., the use of open‐ended questions) when interviewing child witnesses about abuse. However, little research has examined the sub skills associated with open question usage. In this article, we examined the association between investigative interviewers' ability to identify various types of questions and adherence to open‐ended questions in a standardized mock interview. Study 1 , incorporating 27 trainee police interviewers, revealed positive associations between open‐ended question usage and two tasks; a recognition task where trainees used a structured protocol to guide their response and a recall task where they generated examples of open‐ended questions from memory. In Study 2 , incorporating a more heterogeneous sample of 40 professionals and a different training format and range of tests, positive relationships between interviewers' identification of questions and adherence to best‐practice interviewing was consistently revealed. A measure of interviewer knowledge about what constitutes best‐practice investigative (as opposed to knowledge of question types) showed no association with interviewer performance. The implications of these findings for interviewer training programs are discussed.