INDIVIDUAL AND COPARENTING DIFFERENCES BETWEEN DIVORCING AND UNMARRIED FATHERS

The current study examines differences in demographic characteristics, parental conflict, and nonresidential father involvement between divorcing and unmarried fathers with young children. Participants were 161 families (36 unmarried) with children aged 0 to 6 years, involved in a larger longitudinal study of separating and divorcing families. Baseline data were gathered from parenting plans, court databases, and parent reports. Results indicated that unmarried fathers were younger, more economically disadvantaged, less well educated, less likely to have their children living with them, and had less influence on decision making. Unmarried fathers reported more conflict regarding their attempts to be involved with their children in their day-to-day activities. Understanding these unique characteristics and dynamics will help to maximize effective services in the legal system for unmarried couples.     

Results from the NIST 2004 DNA Quantitation Study

For optimal DNA short tandem repeat (STR) typing results, the DNA concentration ([DNA]) of the sample must be accurately determined prior to the polymerase chain reaction (PCR) amplification step in the typing process. In early 2004, the National Institute of Standards and Technology (NIST) conducted an interlaboratory study to help assess the accuracy of DNA quantitation in forensic DNA laboratories. This study was designed with four primary purposes: (1) to examine concentration effects and to probe performance at the lower DNA concentration levels that are frequently seen in forensic casework; (2) to examine consistency with various methodologies across multiple laboratories; (3) to examine single versus multiple source samples; and (4) to study DNA stability over time and through shipping in two types of storage tubes. Eight DNA samples of [DNA] from 0.05 ng/microL to 1.5 ng/microL were distributed. A total of 287 independent data sets were returned from 80 participants. Results were reported for 19 different DNA quantitation methodologies. Approximately 65% of the data were obtained using traditional slot blot hybridization methods; 21% were obtained using newly available quantitative real-time PCR (Q-PCR) techniques. Information from this interlaboratory study is guiding development of a future NIST Standard Reference Material for Human DNA Quantitation, SRM 2372.     

Chromosomal duplications along the Y-chromosome and their potential impact on Y-STR interpretation

Y-chromosome short tandem repeat (Y-STR) markers are being used as potential tools for distinguishing low levels of male DNA in the presence of excess female DNA as is present in many sexual assault samples. Usually single copy Y-STR loci produce a single amplicon in single source samples, and thus the observation of multiple peaks at such a locus could suggest to an analyst that a mixture of more than one male contributor is present in the tested sample. However, many regions of the Y-chromosome are duplicated or even triplicated in some individuals and this fact can thus complicate potential mixture interpretation. Reasons for the presence of duplications at multiple loci within a single sample are explored in the context of Y-STR marker location along the chromosome. True male-male mixtures commonly exhibit more than one locus-specific PCR product across multiple Y-STR loci that are not adjacent to one another on the Y-chromosome. In addition, duplicated loci typically possess alleles that differ by only a single repeat unit and possess similar peak heights.     

SOCIAL SCIENCE RESEARCH AND SOCIAL POLICY: BRIDGING THE GAP1

Clinical examples of misapplications of social science research are reviewed with an emphasis on what can be learned with regard to dealing with and preventing such misuse of this type of knowledge. The differences in language and culture that characterize scientific research as separate from advocacy and social policy are also examined, with recommendations for improved cross‐cultural communication.     

Analysis of mutations in father–son pairs with 17 Y-STR loci

We have examined 389 father/son sample pairs from U.S. Caucasians, African Americans, Hispanics and Asians using the 17 Y-STR loci in the Yfiler™ kit and observed a total of 24 differences between father and son. Thirteen mutations resulted in the gain of a repeat in the son and 11 resulted in a loss of a repeat. All samples resulted in single repeat mutations except one sample which contained a two repeat loss at Y-GATA-H4. Furthermore, two different sample pairs were found to have two mutations. An African American sample pair had a mutation at DYS458 and a second at DYS635 and an Asian sample pair had mutations at DYS439 and Y-GATA-H4.     

Local Venues for Change: Legal Strategies for Healthy Environments

Mounting evidence documents the extraordinary toll on human health resulting from the consumption of unhealthy food products and physical inactivity. In response to America's growing obesity problem, local policymakers have been looking for legal strategies that can be adopted in their communities to encourage healthful behaviors. In order to provide practical tools to policymakers, this article examines four possible venues for local policy change to improve the health of a community: (1) the school environment (2) the built environment (3) community facilities and (4) the point of sale environment. Finally, the article examines the use of taxes or fees as a means of paying for nutrition policy work as well as potentially reducing the consumption of unhealthy products. This article illustrates that local laws and policies can be a valuable tool in changing a community's environment in order to improve nutritional options and increase opportunities for physical activity.     

I’m Not Voting for Her: Polling Discrepancies and Female Candidates

Although there is a large literature on the predictive accuracy of pre-election polls, there is virtually no systematic research examining the role that a candidate’s gender plays in polling accuracy. This is a surprising omission given the precipitous growth of female candidates in recent years. Looking at Senate and Gubernatorial candidates from 1989 to 2008 (more than 200 elections in over 40 states), we analyze the accuracy of pre-election polls for almost the complete universe of female candidates and a matched sample of white male cases. We demonstrate that pre-election polls consistently underestimate support for female candidates when compared to white male candidates. Furthermore, our results indicate that this phenomenon—which we dub the Richards Effect, after Ann Richards of Texas—is more common in states which exhibit traits associated with culturally conservative views of gender issues.