Shortened versions of the Gudjonsson Suggestibility Scale meet the standards

Purpose. The Gudjonsson Suggestibility Scale (GSS; Gudjonsson, 1984, 1997 ) is a well‐established forensic tool for measuring interrogative suggestibility. However, one restriction of this tool is that it requires an extensive testing procedure. The present study examined whether shorter versions of the GSS yield similar results as the original GSS procedure. Methods. One group (N=20) was given a shortened version of the GSS that consisted of an immediate recall test and the specific questions. GSS scores in this group were compared with those in a group (N=20) that had the standard procedure which includes a retention interval and immediate and delayed recall tests. A third group (N=20) was administered a shortened procedure in which the 20 GSS questions immediately followed the GSS story. In the fourth group (N=20), participants were given the retention interval, but no recall tests were administered. Results. ANOVA showed no differences in GSS scores amongst the four groups. Post hoc power analyses indicated that these non‐significant findings were not the result of a power problem and that larger sample sizes are expected to yield comparable results. Further analyses showed that neither the retention delay nor the recall tests affected suggestibility scores. Conclusions. These results suggest that shortened procedures for administering the GSS may be employed in situations where time is a key factor.     

The relationship of suggestibility and compliance with self-deception and other-deception

The aim of the study was to assess the relationship of interrogative suggestibility and compliance with other-deception and self-deception. The Gudjonsson Suggestibility Scale (GSS 1), the Gudjonsson Compliance Scale (GCS), the Eysenck Personality Questionnaire (EPQ), and the Other and Self-Deception questionnaires (ODQ and SDQ) were administered to 237 Icelandic prison inmates. Other and Self-Deception scores did not correlate significantly with suggestibility and compliance, whereas significant correlations were found between the deception scores and EPQ Psychoticism, Neuroticism and Lie scores. The EPQ Lie score explained about one-third of the variance in the ODQ score, suggesting a considerable overlap between the two impression management measures. The most important practical implication of the findings is that self-favouring bias does not appear to significantly influence suggestibility and compliance scores.     

Psychological and behavioral adjustment in female youths with high or low psychopathic traits

The aim of the present study was to analyze the role of psychopathic traits in female juvenile delinquency. Using a sample of 236 young females from the Juvenile Detention Centers of the Portuguese Ministry of Justice and schools in the Lisbon area, a group of female youths with high psychopathic traits (n = 118; M = 15.84 years of age; range = 14–18 years of age) and a group of female youths with low psychopathic traits (n = 118; M = 15.77 years of age; range = 14–18 years of age) were formed based on the Portuguese version of the Antisocial Process Screening Device-Self-report (APSD-SR). The results showed that young females with high psychopathic traits start engaging in criminal activities and come into contact with the justice system earlier in life; exhibit higher levels of behavioral problems, conduct disorder, delinquent behaviors and serious criminality; and demonstrate lower levels of self-esteem and pro-social behavior. The importance of some variables in predicting group membership (high versus low psychopathic traits) was established through a binary logistic regression. Our findings reinforce the importance of the psychopathy construct for the early identification of potentially high-risk female youths and for the assessment of female youths who have already come into contact with the judicial system.     

Further data on interrogative suggestibility and compliance scores following instructed malingering

Purpose. This study examined whether people can successfully feign high levels of interrogative suggestibility and compliance as measured by the Gudjonsson Suggestibility Scales (GSS) and the Gudjonsson Compliance Scale (GCS) when given instructions to malinger. Methods. Participants (N = 90) were randomly allocated to one of three groups that received: (1) instructions to give into leading questions in order to look vulnerable to suggestions, (2) instructions to be compliant with the examiner, or (3) the standard GSS/GCS instructions. Results. One of the two malingering instructions led to modestly elevated scores of total suggestibility, while subscales remained unaffected. In contrast, both malingering groups obtained highly elevated compliance scores. Conclusions. These findings suggest that heightened suggestibility is rather difficult to malinger, thereby confirming the reliability of the GSS. On the other hand, it might be easier to malingering compliance as measured with the self‐report GCS.     

Sibling Proactive and Reactive Aggression in Adolescence

We describe sibling proactive and reactive aggression in middle and late adolescence. Participants were 8th (n?=?303, M _age?=?13.74 years, SD?=?.59) and 12th (n?=?300, M _age?=?17.73 years, SD?=?.56) grade adolescents who completed an in-school survey. Findings revealed that these adolescents were significantly more likely to engage in reactive than proactive aggression with their closest-aged sibling. However, 8th grade adolescents reported greater aggression toward their closest-aged sibling than did 12th grade adolescents. In addition, sex composition of the sibling dyad moderated the association between sibling relationship quality (i.e., warmth and rivalry) and both proactive and reactive aggression indicating unique links for brother-brother and older sister-younger brother pairs.     

The stability and generalizability of young children's suggestibility over a 44-month interval

Abstract

We discuss a 44-month longitudinal study of the stability of the two-factor Norwegian Book Suggestibility Scale for Children (BSSC; Melinder, Scullin, Gunner?d, & Nyborg, 2005) in a sample of 7-year-old children (M _{Time 2 age}=94 months). Several measures of suggestibility were assessed: yielding to suggestive questions (Yield), shifting answers in response to negative feedback (Shift), the sum of Yield and Shift (Total Suggestibility), and suggestibility in response to open-ended and misleading direct and tag questions about an event experienced 44 months earlier. Results showed a moderate correlation for Total Suggestibility scores over time in spite of marked declines in Yield and Shift. Both Yield and Total Suggestibility were related to children's tendency to respond affirmatively to misleading tag questions about the past event. The two-factor model of suggestibility showed some weakening over time with a positive correlation developing between Yield and Shift.     

Negative emotional states,life adversity,and interrogative suggestibility

Purpose. Interrogative suggestibility has been shown to vary according to cognitive and personality factors and if reliably measured may predict performance in real forensic interviews. It is therefore of both theoretical and practical interest to identify which psychological factors are most closely related to suggestible responding. This study examines the extent to which individual differences in negative emotional states predict performance on a measure of interrogative suggestibility and also tests the assumption that self‐reports of negative life events are associated with suggestibility. Method. A non‐clinical sample (N= 80) of participants was administered the brief form of the Depression Anxiety Stress Scales (DASS‐21), the Life Experiences Survey (LES), and the Gudjonsson Suggestibility Scale (GSS‐1). Results. Negative emotional states were found to correlate positively, although moderately, with all of the suggestibility measures. Multiple regression analyses found significant predictive models emerged for Yield 1, Yield 2, and Total Suggestibility. Each of these predicted a small proportion of the variance. Negative life event impact ratings were not associated with interrogative suggestibility. Conclusions. The findings suggest that brief self‐report measures of negative emotional states are limited as predictors of interrogative suggestibility. The results also call into question the predictive utility of traditional checklist measures of life adversity for forensic purposes.     

How well does the Gudjonsson Suggestibility Scale for Children,version 2 predict the recall of false details among children with and without intellectual disabilities?

Purpose . This study explored the effectiveness of the Gudjonsson Suggestibility Scale for Children, version 2 in predicting the tendency of older school‐aged children (with and without intellectual disabilities) to generate errors in an independent suggestibility paradigm. Method . Sixty‐nine children with an intellectual disability (aged 9–14 years) and 50 mainstream children matched for chronological age participated in a 30‐minute magic show that was staged at their school. Three days later, the children participated in a separate biasing interview that provided seven true and seven false details about the magic show. The following day, the children participated in a second interview where they were required to recall the magic show in their own words and answer a series of cued‐recall questions. Between 1 and 2 weeks later, the children were administered the Gudjonsson Suggestibility Scale‐2 (GSS‐2). Results . While there was no significant association between performance on the GSS‐2 and the independent suggestibility paradigm for the children with an intellectual disability, the chronological age‐matched children's yield scores predicted their reporting of both false‐new details and false‐interviewer suggestions for the independent event. Conclusion . When predicting children's recall of false details, the GSS‐2 appears to be more useful with mainstream school‐aged children compared with children who have an intellectual disability.     

The relationship between intelligence,memory and interrogative suggestibility in young offenders

Abstract

The study investigated the relationship between interrogative suggestibility and relevant cognitive factors as proposed by Gudjonsson and Clark (1986). The subjects were fifty-eight adolescent young offenders resident in a national children's centre with secure facilities. All were administered the Gudjonsson Suggestibility Scale and the Wechsler Intelligence Scale for Children. Interrogative suggestibility correlated negatively with intelligence and recall memory. Limited evidence of range effects was found for the relationship between intelligence and suggestibility, but not for the relationship between recall memory and suggestibility.     

Suggestibility and children with mild learning disabilities: The use of the cognitive interview

Abstract

The aims of this paper were firstly to identify any differences in the level of suggestibility between 20 7–9-year-old children with mild learning disabilities and 20 children with average academic ability using the Gudjonsson Suggestibility Scale 2 (GSS2) and, secondly, to note the impact of the cognitive interview on the response patterns of children with mild learning disabilities.

On the GSS2, average academic ability children recalled significantly more correct details than children with mild learning disabilities. There was no significant difference between the two groups of children on distortions, fabrications, total confabulations or on any of the four measures of suggestibility.

In the second part of the study, 38 children with mild learning disabilities watched a filmed event and then were interviewed using either a standard or a modified version of the cognitive interview. Following this, all participants were asked specific questions, some of which incorporated misleading information. One week later each participant was re-questioned. This time critical questions were included about the truth of the presuppositions introduced in the initial interview session. It was found that the cognitive interview elicited significantly more correct and incorrect details than a standard interview with no significant difference in fabrications. Use of the cognitive interview did not significantly affect susceptibility to subsequent misleading suggestions.     

Allelic frequencies and statistical data obtained from 48 AIM INDEL loci in an admixed population from the Brazilian Amazon

Allelic frequencies of 48 informative insert-delete (INDEL) loci were obtained from a sample set of 130 unrelated individuals living in Macapá, a city located in the northern Amazon region, in Brazil. The values of heterozygosity (H), polymorphic information content (PIC), power of discrimination (PD), power of exclusion (PE), matching probability (MP) and typical paternity index (TPI) were calculated and showed the forensic efficiency of these genetic markers. Based on the allele frequency obtained for the population of Macapá, we estimated an interethnic admixture for the three parental groups (European, Native American and African) of, respectively, 50%, 21% and 29%. Comparing these allele frequencies with those of other Brazilian populations and the parental populations, statistically significant distances were found. The interpopulation genetic distance (F_ST coefficients) to the present database ranged from F_ST = 0.0431 (p < 0.00001) between Macapá and Belém to F_ST = 0.266 (p < 0.00001) between Macapá and the Native American group.     

Population data for six X-chromosome STR loci in a Rio de Janeiro (Brazil) sample: Usefulness in forensic casework

This study presents data for the X-chromosome STR loci DXS7133, DXS7424, DXS8378, DXS6807, DXS7423 and DXS8377. In order to establish a database, unrelated individuals (males and females) from Rio de Janeiro were typed for the above loci. No significant differences were observed between allele frequencies in male and female samples (non-differentiation exact P values ≥ 0.156). Hardy-Weinberg equilibrium was tested in the female sample and no significant deviations were found. All six markers have shown to be highly polymorphic in our sample with gene diversities varying between 0.6797 for DXS7133, and 0.9260 for DXS8377. Pairwise linkage disequilibrium analysis did not allow discharging a possible association between DXS7133 and DXS7424 alleles in Rio de Janeiro population. Parameters of forensic interest, like PD_M, PD_F, Het_obs, Het_exp, were calculated for each locus. The high discrimination power estimated in both males and females, as well as mean exclusion chance in father/daughter duos and in father/mother/daughter trios, demonstrates the usefulness of these six markers in forensic investigation.     

Child and adult witnesses with intellectual disability: The importance of suggestibility

Purpose. The main aim of the study was to examine the relationship between learning (intellectual) disability and interrogative suggestibility among children (11‐12 years old) and adults. Method. The Gudjonsson Suggestibility Scale (GSS 2) was administered to 110 children and 221 adults who were categorized into three groups according to fullscale IQ scores: (1) normal IQ (>75); (2) mild impairment (IQ score 55‐75); and (3) moderate impairment (IQ score <55). Results. Highly significant differences in memory and suggestibility emerged in both the child and adult samples across groups. Using memory as a covariate in the analysis eliminated the significant group differences for ‘yield 1’ among the children, but not for adults. There was no significant influence of memory on ‘shift’ in either group. Whereas ‘shift’ was significantly influenced by intellectual disability in children, no significant difference emerged across groups among adults. Conclusions. Children and adults with learning disability have much poorer memory and higher suggestibility scores than their contemporariesof normal intelligence. Differences in suggestibility are only partly explained by poorer memory scores. The findings reveal important differences between children and adults with intellectual disabilities. Children with learning disabilities are more susceptible to altering their answers under pressure than are adults with learning disabilities.     

Parental Depressive Symptoms and Youth Internalizing and Externalizing Problems: The Moderating Role of Interparental Conflict

The current investigation examined if interparental conflict (IPC), including psychological and physical violence, moderated the relationship between parental depressive symptoms and youth internalizing and externalizing problems, respectively, in a sample of youth with a parent with a history of Major Depressive Disorder (MDD). One hundred and eighty families with a parent with a history of MDD (M _age = 41.96; 88.9 % mothers) and a youth in the target age range of 9-to-15 years (49.4 % females; M _age = 11.46) participated. Findings indicated that IPC exacerbated the effect of parental depressive symptoms on internalizing, but not externalizing, problems for both males and females. Findings suggest that, in families with a parent who has a history of depression, parental depressive symptoms and IPC together have important implications for youth internalizing problems. Targeting improvement for both parent depressive symptoms and interparental conflict may directly lead to decreases in youth internalizing symptoms in the context of parental depression.     

Interacting influences on interrogative suggestibility

Purpose. Research using the Gudjonsson Suggestibility Scales (GSS) has found interrogative suggestibility (IS) to vary as a function of the overall demeanour of the interviewer, warnings about the presence of misleading information, and the self‐esteem of the interviewee, as outlined by Gudjonsson and Clark (1986). The present study attempted to assess how these factors interact. Method. The study had a three‐factor between‐participants design: interviewer demeanour × instructional manipulation × self‐esteem. One hundred and twenty undergraduates took part in the study. Results. Participants reporting lower self‐esteem scored higher on the GSS ‘Shift’ measure than participants reporting higher levels of self‐esteem. Participants faced with a ‘Friendly’ interviewer scored lower on the GSS Yield 1 and Total Suggestibility measures than did those participants faced with a more ‘Abrupt’ interviewer. Participants warned about the presence of misleading information scored lower on Yield 1 and Total Suggestibility. A potentially key finding was that participants who received a warning demonstrated an increased number of Shifts in the Friendly condition compared with those who were not warned. In the Abrupt condition this pattern was reversed. Conclusion. The results supported studies showing that all three variables tested affect levels of IS but further suggested that optimal interviewer support for interviewees' discrepancy detection may be provided either by a relaxed interviewer manner or by warnings alone, but not by both.     

Comparing the Recognition Memory Test and the Word Choice Test in a Mixed Clinical Sample: Are They Equivalent?

The Recognition Memory Test (RMT) was compared to the Word Choice Test (WCT) within the same fixed neuropsychological battery administered to a mixed clinical sample of 237 adults to empirically evaluate the psychometric equivalence of these two instruments. On average, there was a 3-point difference in raw scores between the two instruments (M _RMT?=?44.3, SD _RMT?=?6.8; M _WCT?=?47.1, SD _WCT?=?4.6; p?d?=?.48). The probability density functions differ substantially at the two ends of the scale but are similarly ≤42. Cross-validation analyses suggest that the RMT cutoff of ≤42 is functionally equivalent to a WCT score of ≤45.     

Age estimation by pulp/tooth area ratio in canines: Cameriere's method assessed in an Indian sample using radiovisiography

Age estimation of an individual whether living or dead is an intimidating task in forensic investigations. Since teeth are more resistant to most peri- and post-mortem changes, they are frequently used for identification and age estimation when skeletal remains are in poor condition. However, most methods are destructive and warrant extraction of teeth which is not feasible in living individuals. Cameriere's et al. put forth a radiographic method of age estimation by pulp to tooth area ratio (AR) in canines and revealed a linear regression between age and the AR. In the present study, we estimated the AR in 456 canines (upper, lower and both) in an Indian sample (114 males and 114 females) using radiovisiography technique. Linear regression equations were derived for upper canine, lower canine and both using the AR to estimate chronological age. Additionally, the efficacy of these equations was also evaluated in younger age group (<45 years). The formulas derived, i.e., age = 96.795 ? 513.561x₁ (Eq. (1)) for upper canine, age = 88.308 ? 458.137x₂ (Eq. (2)) for lower canine and age = 99.190 ? 283.537x₁ ? 306.902x₂ + 400.873x₁x₂ (Eq. (3)) for both the canines were applied to predict the chronological age. The mean value of residuals using these regression equations ranged from 4.28 to 6.39 years with upper canine equation generally giving a precise result. When these equations were applied for younger ages (<45 years), the regression equation derived from both canines gave a better result (mean residual 2.70 years). Overall these equations were better able to predict the age in younger ages, i.e., up to 45 years.     

On the consequences of ignoring genetic influences in criminological research

Purpose

Many criminological scholars explore the social causes of crime while giving little consideration to the possibility that genetic factors underlie the observed associations. Indeed, the standard social science method (SSSM) assumes genetic influences do not confound the association between X and Y. Yet, a nascent stream of evidence has questioned the validity of this approach by revealing many criminological variables are at least partially affected by genetic influences. As a result, a substantial proportion of the literature may be misspecified due to uncontrolled genetic factors. No effort has been made to directly estimate the extent to which genetic confounding has biased the associations presented in criminological studies.

Methods

The present study seeks to address this issue by drawing on simulated datasets.

Results/Conclusions

Results suggest genetic confounding may account for a negligible portion of the relationship between X and Y when their correlation (r_yx) is larger than the correlation between genetic factors and Y (i.e., r_yx > r_yg). Genetic confounding appears to be much more problematic when the correlation between X and Y is in the moderate-to-small range (e.g., r_yx = .20) and the genetic effect is in the moderate-to-large range (e.g., r_yg ≥ .30).     

Verbal ability,depression, and anxiety as correlates of interrogative suggestibility in children exposed to life adversities

In the present study, we assess the relationship of verbal ability, depression, and anxiety with interrogative suggestibility (IS) in a sample of children exposed to life adversities and requiring assistance by the governmental social service (n?=?39), as compared with normal controls (n?=?36). The Gudjonsson Suggestibility Scale 2 was administered to participants in a battery including measures of memory capacity, verbal ability, depression, and anxiety. The finding showed that the ‘assisted’ children were significantly more suggestible than the controls with a large effect size for Yield 1 and total suggestibility. In addition, IS was negatively correlated with verbal memory and ability, but not with anxiety and depression. The two groups differed as to their level of total suggestibility after adjusting for verbal ability. Implications of the findings for the forensic assessment of vulnerable subjects are discussed.     

A national population based examination of the association between age-versatility trajectories and recidivism rates

Purpose

To compare theoretical explanations of the age-versatility curve including the hypotheses of: self-control theory stating that versatility is followed by specialization; taxonomic theory stating that adolescent-limited offenders are specialists and life-course offenders are versatile and orthogenetic theory stating that specialization and versatility are present in a large number of offender groups.

Methods

These explanations were tested with Israeli national population-based data on all first and subsequent juvenile offenders (n = 17,176) with 248,114 registered police contacts from 1996 to 2008.

Results

Semi-parametric group-based modeling identified two trajectory-groups that characterized the age-versatility curve of police contacts before first conviction. The trajectory-groups were labeled as versatility (n = 2,447; 14.2%), and specialization (n = 14,729; 85.8%). After controlling for 19 documented demographic, familial, and criminogenic risk factors, Cox regression showed that juvenile offenders in the versatility group were at increased risk of recidivism compared to offenders in the specialization group.

Conclusions

These results partially adhere with taxonomic theory than the remaining theories and indicate that assuming a trajectory of elevated pre-conviction versatility increases the risk of recidivism.