Response Latency Methodology for Survey Research: Measurement and Modeling Strategies

In public opinion research, response latency is a measure ofattitude accessibility, which is the ease or swiftness withwhich an attitude comes to mind when a respondent is presentedwith a survey question. Attitude accessibility represents thestrength of the association in memory between an attitude objectand an evaluation of the object. Recent research shows thatattitude accessibility, as measured by response latency, castslight on a wide range of phenomena of public opinion and politicalbehavior. We discuss response latency methodology for surveyresearch and advocate the use of latent response latency timers(which are invisible both to respondents and interviewers) asa low cost, low-maintenance alternative to traditional methodsof measuring response latency in public opinion surveys. Weshow that with appropriate model specification latent responselatency timers may provide a suitable alternative to the morecomplicated and expensive interviewer-activated timers.     

Mental health correlates of the victim-perpetrator relationship among interpersonally victimized adolescents

This research examines mental health correlates of different victim-perpetrator relationships among adolescent victims of interpersonal violence. A large and nationally representative sample of adolescents (N = 4,023) responded to structured telephone interviews concerning mental health functioning (posttraumatic stress disorder-PTSD, major depressive disorder, substance abuse/dependence, and delinquency). Those reporting histories of sexual (n = 321) and/or physical (n = 688) assault were queried about specific aspects of their assaults, including their relationship with the perpetrator. After controlling for demographic and assault-related risk factors, the victim-perpetrator relationship remained a significant risk factor for mental health problems. Adolescents sexually assaulted by nonstrangers were at increased risk for PTSD; those sexually assaulted by acquaintances or people they did not know well were at increased risk for delinquency. Adolescents who were physically assaulted by a family member were at increased risk for PTSD. Explanations for the findings and the need for consistent assessment methods across related studies are discussed.     

Violence, Separation, and Loss in the Families of Origin of Domestically Violent Men

The intergenerational transmission of domestic violence is most commonly studied from the perspective of social learning theory, with the consequence that variables external to that perspective are often overlooked. This study was undertaken in an effort to broaden the theoretical basis of intergenerational transmission of domestic violence by assessing if incorporating variables from attachment theory (measures of separation and loss) with exposure to violence in family of origin would increase predictive power of a multiple regression model. Subjects (N = 74) were men in treatment for domestic violence. Separation and loss variables were found to exert effects on respondents’ violent behavior greater than or comparable to those from exposure to family of origin violence. Findings supported a need to broaden theoretical views of the etiology of domestic violence perpetration.     

Drug and alcohol use as determinants of New York City homicide trends from 1990 to 1998

In this population-level study, we analyzed how well changes in drug and alcohol use among homicide victims explained declining homicide rates in New York City between 1990 and 1998. Victim demographics, cause of death, and toxicology were obtained for all homicide (N = 12573) and accidental death victims (N = 6351) between 1990 and 1998 from the Office of the Chief Medical Examiner of New York (OCME). The proportion of homicide and accident decedents positive for cocaine fell between 1990 and 1998 (13% and 9% respectively); the proportion of homicide and accident decedents positive for opiates and/or alcohol did not change significantly. Changing patterns of drug and alcohol use by homicide victims were comparable to changing patterns of drug and alcohol use in accident victims, suggesting that changes in drug and alcohol use among homicide victims between 1990 and 1998 cannot solely explain the decline in NYC homicide rates.     

Forensic Applications of the Miller Forensic Assessment of Symptoms Test (MFAST): Screening for Feigned Disorders in Competency to Stand Trial Evaluations

Forensic evaluations must systematically assess malingering and related response styles. In the criminal forensic domain, competency to stand trial evaluations are the most common referrals. Effective screens for feigned incompetency would be valuable assets for forensic evaluations. This study evaluates the effectiveness of the Miller Forensic Assessment of Symptoms Test (MFAST) as a screen for feigned incompetency. Using a simulation design, the MFAST was tested on jail and competency-restoration samples. Most notably, recommended MFAST cut score (6) was useful for the identification of feigning cases in competency evaluations. Recommendations for forensic practice, including the advantages and disadvantages of systematic screens, are discussed.     

Inference of human geographic origins using Alu insertion polymorphisms

The inference of an individual's geographic ancestry or origin can be critical in narrowing the field of potential suspects in a criminal investigation. Most current technologies rely on single nucleotide polymorphism (SNP) genotypes to accomplish this task. However, SNPs can introduce homoplasy into an analysis since they can be identical-by-state. We introduce the use of insertion polymorphisms based on short interspersed elements (SINEs) as a potential alternative to SNPs. SINE polymorphisms are identical-by-descent, essentially homoplasy-free, and inexpensive to genotype using a variety of approaches. Herein, we present results of a blind study using 100 Alu insertion polymorphisms to infer the geographic ancestry of 18 unknown individuals from a variety of geographic locations. Using a Structure analysis of the Alu insertion polymorphism-based genotypes, we were able to correctly infer the geographic affiliation of all 18 unknown human individuals with high levels of confidence. This technique to infer the geographic affiliation of unknown human DNA samples will be a useful tool in forensic genomics.