Quality of Laypersons' Assessment of Forensically Relevant Stimuli,

The current study examined the potential for cognitive bias in lay examiners' comparisons of footwear impressions within the technical review process while addressing limitations of previous research. Prior research has found inconsistent results regarding the extent to which cognitive bias may influence forensic comparisons, often asking non-experts to review forensic stimuli above their competency level. Furthermore, past research has largely ignored the potential for cognitive bias during the technical review process. In collaboration with the Miami-Dade Police Department's Forensic Services Bureau, we examined the effects of previous examiners' level of experience and prior knowledge of the previous examiner's decision on the technical review stage of footwear impression stimuli. Before lay examiners were presented with pairs of known match and nonmatch footwear impressions, they were either told that an expert or a novice had previously examined them and determined them to be either a match, nonmatch, or inconclusive (plus a no-information condition). Participants then evaluated each pair of footwear impressions to make their own determinations of match, nonmatch, or inconclusive. Results support the technical review process for all decision types, as known nonmatch stimuli were generally more difficult for lay examiners to assess than known match stimuli. Knowledge of a prior examiner's decision and status was observed only when the prior decision was inconclusive, suggesting the need for inclusion of inconclusive decisions in future research examining cognitive bias in forensic examination.     

Risk and Protective Factors for Recurrent Intimate Partner Violence in a Cohort of Low-Income Inner-City Women

The purpose of this study was to identify longitudinal predictors of any (versus no) episodes of recurrent intimate partner violence (IPV) and their severity among low-income inner-city women. A secondary analysis was conducted on data from an inception cohort of 321 previously abused women from the Chicago Women’s Health Risk Study. In a multivariable logistic regression model, pregnancy, frequency of IPV in the year prior to the baseline interview, and the partner’s use of power and control tactics increased the odds of recurrent IPV during the follow-up period and leaving an abusive partner reduced the odds. In a multivariate proportional odds logistic regression model, partner violence outside the home was associated with higher severity of recurrent IPV, but leaving an abusive partner was not. The results suggest that, for low-income women, leaving an abusive partner may reduce the risk of recurrent victimization without increasing severity of the recurrent attacks that do occur.     

Measuring physical status and timing in early adolescence: A developmental perspective

Recently, the timing-of-events model typically used for exploring adult development has been proposed for studying early adolescence and the pubertal processes occurring then. As a consequence, new interest has been generated about the psychological effects of being early, on time, or late in sexual maturation during early adolescence. A major issue has to do with the choice of maturational events to study, since puberty is a process involving numerous events, all of which have a different developmental course. This paper reviews some of the maturational events that are applicable in studying psychological effects of pubertal status and timing. Nine changes are reviewed (bone, height, weight, body fat, breast, body hair, penile, testicular, and menarcheal changes) in terms of measurement techniques, psychometric properties, and intercorrelations with other pubertal events. In addition, the usefulness of each measure for psychological research on maturational timing and status is discussed. Finally, how pubertal measures may be incorporated into a developmental perspective is considered, especially with regard to rate, duration, and asynchrony of pubertal changes.Research Interests: Girl's psychological adaptation to pubertal change, biosocial aspects of female reproductive events, development of biological and socially at risk children and adolescents.Research Interests: Reproductive endocrinology, anorexia nervosa, neuroendocrinology, adolescence.     

Making Sense out of Nonsense: The Deconstruction of State-Level Sex Offender Residence Restrictions

Releasing a sex offender from prison or placing the offender on community-based sanctions, only to have the offender commit a new sex crime, is a policy-maker’s worst nightmare. Fueled by misperceptions and public fear, sex offender laws have developed piecemeal and without rigorous empirical insight and testing. While policies and practices are well-intended, they are unlikely to resolve the very real social problem of sexual violence and may inadvertently increase victimization. Such is the possibility with residence restrictions. This type of law is among the newest in an ever-growing barrage of legislation designed specifically for sexual criminals yet what little research that exists suggests there is no correlation between residence and sexual recidivism. This article identifies 30 states with state-level residence restrictions and conducts a content analysis of each state’s legislation. Geographical and other assessments are also conducted.     

The case of Jeffrey Dahmer: sexual serial homicide from a neuropsychiatric developmental perspective

Sexual serial homicidal behavior has received considerable attention during the last three decades. Substantial progress has been made in the development of methods aimed at identifying and apprehending individuals who exhibit these behaviors. In spite of these advances, the origins of sexual serial killing behavior remain for the most part unknown. In this article we propose a biopsychosocial psychiatric model for understanding the origins of sexual serial homicidal behavior from both neuropsychiatric and developmental perspectives, using the case of convicted serial killer Jeffrey Dahmer as the focal point. We propose that his homicidal behavior was intrinsically associated with autistic spectrum psychopathology, specifically Asperger's disorder. The relationship of Asperger's disorder to other psychopathology and to his homicidal behavior is explored. We discuss potential implications of the proposed model for the future study of the causes of sexual serial homicidal crime.     

Reduced volume PCR amplification reactions using the AmpFlSTR Profiler Plus kit

The forensic community continues to seek improvements in DNA typing methods on aspects such as sensitivity and efficacy. Reducing the volume of the AmpFlSTR Profiler Plus reagents offered greater sensitivity and improved the chance of obtaining useful results for samples with very low quantities of DNA and multiple source samples. On the downside, amplifications initiated with less than 0.4 ng of DNA exhibited a twofold increase in the standard deviation of peak ratios. This research suggested a twofold approach to analyzing samples. For samples with greater than 0.25 ng of DNA, a 25 microL reaction is appropriate. Samples that did not demonstrate quantifiable results, or that have less than 0.25 ng, can be amplified by drying the sample directly in the PCR tube and amplifying in a 5 microL reaction. The analyst can expect at least limited results with as little as 0.03 ng of DNA in the 5 microL reaction.