Are forensic experts biased by the side that retained them?

How objective are forensic experts when they are retained by one of the opposing sides in an adversarial legal proceeding? Despite long-standing concerns from within the legal system, little is known about whether experts can provide opinions unbiased by the side that retained them. In this experiment, we paid 108 forensic psychologists and psychiatrists to review the same offender case files, but deceived some to believe that they were consulting for the defense and some to believe that they were consulting for the prosecution. Participants scored each offender on two commonly used, well-researched risk-assessment instruments. Those who believed they were working for the prosecution tended to assign higher risk scores to offenders, whereas those who believed they were working for the defense tended to assign lower risk scores to the same offenders; the effect sizes (d) ranged up to 0.85. The results provide strong evidence of an allegiance effect among some forensic experts in adversarial legal proceedings.

Field reliability of competency and sanity opinions: A systematic review and meta-analysis.

We know surprisingly little about the interrater reliability of forensic psychological opinions, even though courts and other authorities have long called for known error rates for scientific procedures admitted as courtroom testimony. This is particularly true for opinions produced during routine practice in the field, even for some of the most common types of forensic evaluations-evaluations of adjudicative competency and legal sanity. To address this gap, we used meta-analytic procedures and study space methodology to systematically review studies that examined the interrater reliability-particularly the field reliability-of competency and sanity opinions. Of 59 identified studies, 9 addressed the field reliability of competency opinions and 8 addressed the field reliability of sanity opinions. These studies presented a wide range of reliability estimates; pairwise percentage agreements ranged from 57% to 100% and kappas ranged from .28 to 1.0. Meta-analytic combinations of reliability estimates obtained by independent evaluators returned estimates of κ = .49 (95% CI: .40-.58) for competency opinions and κ = .41 (95% CI: .29-.53) for sanity opinions. This wide range of reliability estimates underscores the extent to which different evaluation contexts tend to produce different reliability rates. Unfortunately, our study space analysis illustrates that available field reliability studies typically provide little information about contextual variables crucial to understanding their findings. Given these concerns, we offer suggestions for improving research on the field reliability of competency and sanity opinions, as well as suggestions for improving reliability rates themselves. (PsycINFO Database Record

Older opposite-sex romantic partners, sexual risk, and victimization in adolescence.

This study examined how age gaps among opposite-sex romantic partners related to sexual risk-taking and victimization by partners among 201 at-risk adolescents (60.2% female). We examined three questions: (a) is younger partner age, age gap between partners, or a combination of these two factors most strongly related to negative outcomes; (b) do age gaps relate to negative outcomes differently for male versus female adolescents; and (c) why do age gaps relate to negative outcomes? Results revealed that the wider the age gap between partners, the more likely adolescents were to engage in sex and the less likely they were to use protection against pregnancy and STIs. Wider age gaps were also associated with more frequent emotional and physical victimization and higher odds of unwanted sexual behavior. Findings did not differ significantly by gender or younger partner age. Analyses revealed that the wider the age gap, the more likely both partners were to engage in risky lifestyles (i.e., substance use and delinquency), and risky lifestyles - rather than poor negotiation or decision-making equality - helped to explain associations between age gaps and engagement in sexual intercourse and victimization experiences. Results suggest that relationships with age gaps tend to involve two partners who are engaging in deviant lifestyles overall, further corroborating the need to identify and provide services to these youth. Results also support movements toward considering partner age gaps rather than relying on a set age of consent when determining adolescents' legal competency to consent to sex.