Continuity and Change from Adolescence to Emerging Adulthood: Adolescence-limited vs. Life-course-persistent Profound Ego Development Arrests

Participants (n = 36) with consistent Pre-conformist ego development levels during multiple adolescent assessments were studied to determine whether and how their ego levels had changed at age 25. Those (n = 12) whose ego levels remained at the Pre-conformist level were assigned to a life-course-persistent profound ego development arrest trajectory group; those (n = 24) whose ego levels reached the Conformist or Post-conformist level at age 25 were assigned to an adolescence-limited profound ego development arrest trajectory group. Analysis of predictors and age 25 correlates of group membership revealed that selected age 14 family interaction behaviors differentiated the two groups. At age 25, members of the adolescence-limited group showed superior performance on several measures of interpersonal and intrapersonal functioning.

Multilevel Modeling of Direct Effects and Interactions of Peers,Parents, School,and Community Influences on Adolescent Substance Use

This study tested a social-ecological model of adolescent substance use. Multilevel modeling was used to investigate how systems, such as parents, peers, schools, and communities, directly influence and interact together to influence adolescent substance use. Participants included 14,548 (50.3% female) middle school students who were 78.6% White, 5.4% Biracial, 4.8% Asian, 4.8% Black, and 3.6% Hispanic. Participants completed a survey with scales assessing substance use, peer influences, parental influences, and characteristics of their school and community. Hierarchical linear modeling (HLM) was used to consider the variation of parental and peer influences on substance use and how schools and communities relate to both substance use and the relationship between substance use and peer and parental factors. Results indicated that a positive school climate and a positive sense of community were associated with less adolescent substance use and that a positive sense of community moderated the relation between peer and parental influence on adolescent substance use, thereby acting as a protective factor.

Sibling violence and agonistic interactions experienced by early adolescents

Negative physical and verbal interactions occurring between early adolescents and their closest-spaced sibling were examined. Two hundred forty-four junior high school students provided information concerning their experiences as victims and perpetrators of aggressive and agonistic behaviors. Results confirm earlier studies' findings that siblings engage in numerous hostile interactions and that females and males perform these behaviors to an almost equal extent. Participants' self-reports suggest that parents may underestimate sibling use of physical force to resolve conflicts. Findings indicate there is further need to examine sibling interactions in order to better understand family functioning and family violence.     

Immunochemical and chromatographic determination of ABH antigens in compact bone tissue

The identification of ABH antigens from compact bone tissue is known from many sources. The purpose of this study was to make a contribution to the localization of blood-group-active substances in compact bone tissue. A variety of preparation and identification methods were successfully used and compared. Samples were extracted from compact bone tissue, separated by HPTLC, and examined using the absorption-elution and PAP techniques. Additionally, the PAP technique was carried out on cryostat sections. Serologically active blood-group substances were consistently demonstrated in the organic components of the haversian canals.     

Does Voting by Mail Increase Participation? Using Matching to Analyze a Natural Experiment

Megan Mullin Department of Political Science, Temple University, 408 Gladfelter Hall (025-22), 1115 West Berks Street, Philadelphia, PA 19122-6089 e-mail: mmullin{at}temple.edu (corresponding author) Would holding elections by mail increase voter turnout? Manyelectoral reform advocates predict that mail ballot electionswill boost participation, basing their prediction on the highturnout rate among absentee voters and on the rise in voterturnout after Oregon switched to voting by mail. However, selectionproblems inherent to studies of absentee voters and Oregon giveus important reasons to doubt whether their results would extendto more general applications of voting by mail. In this paper,we isolate the effects of voting in mail ballot elections bytaking advantage of a natural experiment in which voters areassigned in a nearly random process to cast their ballots bymail. We use matching methods to ensure that, in our analysis,the demographic characteristics of these voters mirror thoseof polling-place voters who take part in the same elections.Drawing on data from a large sample of California counties intwo general elections, we find that voting by mail does notdeliver on the promise of greater participation in general elections.In fact, voters who are assigned to vote by mail turn out atlower rates than those who are sent to a polling place. Analysisof a sample of local special elections, by contrast, indicatesthat voting by mail can increase turnout in these otherwiselow-participation contests. Authors' note: We are grateful to the Haynes Foundation forsupporting this project, Karin MacDonald for bringing mail ballotprecincts to our attention, Anup Pradhan for providing criticaldata, Shawn Treier for his helpful comments on an earlier draft,and Sam Deddeh and Mike Binder for data entry assistance.     

Utility of the Y-STR typing systems Y-PLEX 6 and Y-PLEX 5 in forensic casework and 11 Y-STR haplotype database for three major population groups in the United States

The Y-PLEX 6 and Y-PLEX 5 systems enable analysis for 11 Y-STR loci. We present here the utility of these systems in forensic casework. A total of 188 samples, including 127 evidence samples, were analyzed using either or both of the systems. The evidence sample types included fingernail scrapings, sperm or seminal fluid, epithelial cells, blood and other tissues. The Y-STR typing systems provided useful probative results in difficult cases. A reference database for Caucasian (n = 517), African American (n = 535), and Hispanic (n = 245) population groups within the United States was generated for estimating the haplotype frequency in forensic casework. Among the individuals profiled, 311 Caucasians, 412 African Americans, and 194 Hispanics provided unique profiles in their respective population datasets. This is the first report describing the haplotype database for the set of 11 Y-STR loci recommended by the Scientific Working Group on DNA Analysis Methods (SWGDAM). Linkage analysis reveals that the frequencies from forensically important autosomal loci can be multiplied with the Y-STR haplotype frequency. The results from Y-PLEX systems have been accepted in courts in the United States.     

Parental contexts of adolescent self-esteem: A developmental perspective

Relationships between parental behaviors and adolescent self-esteem were analyzed in a group of 95 early adolescents from multiple settings. The study was designed to investigate hypotheses regarding associations between observed parental interactions (e.g., accepting and devaluing) and adolescent self-esteem. Parents' verbal interactions with their adolescents were assessed through application of the constraining and enabling coding system to transcribed family discussions, generated through a revealed differences procedure. Adolescent self-esteem was measured with the Coopersmith Self-Esteem Inventory. Parent interaction-self-esteem associations were examined in the pooled sample, as well as in specific sub-groups based on gender, health, and ego development (measured by the Washington University Sentence Completion Test). Boys had more numerous associations between their self-esteem and parental interactions than girls, and psychiatrically ill boys had particularly high associations. Parental interactions were found to be most strongly related to adolescent self-esteem for adolescents at the lowest levels of ego development. Our findings are consistent with the view that increasing individuation in self-esteem regulation occurs during adolescent development, such that adolescents at higher levels of ego development evaluate themselves more independently of parental feedback than do their less mature peers.This study was supported through a Research Training Grant No. MH16259 (Dr. Isberg) from the NIMH, a grant from the National Institute of Child and Human Development (NICHD Grant No. 5 R01 HD18684-02), and a Research Scientis Development Award No. 5 K-02-MH-70178 (Dr. Hauser) from the NIMH.Received M.D. from Harvard University. Currently studying adolescent development and working with the school consultation program of the Massachusetts Mental Health Center.Received M.D. from Yale University and Ph.D. from Harvard University (Psychology). Currently studying family contexts of adolescent development.Received M.D. from The University of Chicago. Currently studying psychological consequences of diabetes mellitus.Received Ed. D. from Harvard University (School of Education). Currently studying family coping processes in response to stressful events.Received Dipl. Psych. from Freie Universitat, Berlin (Clinical Psychology). Currently studying relationships between psychopathology and development among adolescent psychiatric patients.Received Ph.D. from Ohio State University (Psychology). Current interests in assessing ego development and family systems.Received Ph.D. from the University of Miami (Clinical Psychology). Research interests in family studies and adolescent development.