Opponent Process Theory for Substance Abuse Treatment

This article examines problems and issues of the juvenile justice and drug & alcohol systems in the context of treatment resistant, substance dependent, delinquent youth. The evaluation research on traditional medical model treatment shows high drop-out and relapse rates along with limited impact on polydrug users. Outdoor challenge programs are reviewed as an alternative within the context of Opponent-Process Theory and the therapeutic use of stress. These forms of stressful challenge may produce improved self-esteem and positive affect which may be useful as alternative forms of substance abuse treatment, especially for resistant delinquent youth who have not benefitted from more traditional forms of treatment.     

The community service self-efficacy scale: further evidence on reliability and validity

The Community Service Self-Efficacy Scale (CSSES) measures". . . the individual's confidence in his or her own ability to make clinically significant contributions to the community through service" (Reeb et al., p. 48). Three studies reported in this article replicate and extend past CSSES research. With regard to reliability, results replicate past research in demonstrating internal consistency and temporal consistency. Convergent validity was demonstrated by the finding that, as hypothesized, the CSSES correlated moderately with a measure of general self-efficacy. As hypothesized, the correlation between the CSSES and a measure of social desirability was low in magnitude and non-significant, demonstrating discriminant validity. Regarding gender differences, females tended to score somewhat higher than males on the CSSES. With respect to construct validity, CSSES scores changed in the hypothesized direction in response to an intervention. While past CSSES research focused on college students, one study reported in this paper shows that the CSSES is useful in studying adolescents, including those with psychosocial adjustment problems.     

A validation study for duct tape end matches

Fracture matches are considered to be the strongest association achievable in forensic examinations of glass, metal, wood, plastic, paint, tape, and other trace evidence. Despite being fairly routine examinations, few publications exist to support their admissibility in court. This study was designed, using duct tape as the fractured medium, to determine the validity and error rate associated with conducting end match (fracture match) examinations on this material. Five test designs, which varied either the source roll of tape or manner of separation (torn or cut) from the roll, were administered to four analysts with instructions to examine the assigned test sets for end matches. If an end match was not identified by the initial analyst, the entire test set was independently evaluated by the remaining three analysts. Results indicated that while tape grade did not hinder end match identification, the manner of separation could affect results.     

Twelve short tandem repeat loci Y chromosome haplotypes: genetic analysis on populations residing in North America

A total of 2443 male individuals, previously typed for the 13 CODIS STR loci, distributed across the five North American population groups African American, Asian, Caucasian, Hispanic, and Native American were typed for the Y-STR loci DYS19, DYS385a/b, DYS389I/II, DYS390, DYS391, DYS392, DYS393, DYS437, DYS438 and DYS439 using the PowerPlex Y System. All population samples were highly polymorphic for the 12 Y-STR loci with the marker DYS385a/b being the most polymorphic across all sample populations. The Native American population groups demonstrated the lowest genetic diversity, most notably at the DYS393 and DYS437 loci. Almost all of the 12-locus haplotypes observed in the sample populations were represented only once in the database. Haplotype diversities were greater than 99.6% for the African Americans, Caucasians, Hispanics, and Asians. The Native Americans had the lowest haplotype diversities (Apaches, 97.0%; Navajo, 98.1%). Population substructure effects were greater for Y-haplotypes, compared with that for the autosomal loci. For the apportionment of variance for the 12 Y-STRs, the within sample population variation was the largest component (>98% for each major population group and approximately 97% in Native Americans), and the variance component contributed by the major population groups was less than the individual component, but much greater than among sample populations within a major group (11.79% versus 1.02% for African Americans/Caucasians/Hispanics and 15.35% versus 1.25% for all five major populations). When each major population is analyzed individually, the R(ST) values were low but showed significant among group heterogeneity. In 692 confirmed father-son pairs, 14 mutation events were observed with the average rate of 1.57x10(-3)/locus/generation (a 95% confidence bound of 0.83x10(-3) to 2.69x10(-3)). Since the Y-STR loci reside on the non-recombining region of the Y chromosome, the counting method is one approach suggested for conveying an estimate of the rarity of the Y-haplotype. Because the Y-STR loci are not all in disequilibrium to the same extent, the counting method is a very conservative approach. The data also support that autosomal STR frequencies can be multiplied by the upper bound frequency estimate of a Y-haplotype in the individual population group or those pooled into major population groups (i.e., Caucasian, African American, Hispanic, and Asian). These analyses support use of the haplotype population data for estimating Y-STR profile frequencies for populations residing in North America.