Comparison of the elemental composition of office document paper: evidence in a homicide case

Fraudulent substitution of a page within a multiple page document such as a will or business contract, the counterfeit manufacture of paper banknotes, and linking ransom or extortion notes have all been the focus of criminal investigations at one time or another. In a recent homicide investigation, document examiners were requested to compare a threatening letter received by a business partner of the deceased with paper samples seized under warrant from a suspect's house. Through a quantitative elemental analysis of the concentrations of nine elements (Na, Mg, Al, Mn, Sr, Y, Ba, La, and Ce) within the questioned and specimen documents, determined by inductively coupled plasma-mass spectrometry (ICP-MS), it was concluded that (i) the paper of the threatening letter originated from a different source to that of the paper seized from the suspect's house and (ii) all six pages of paper seized from the suspect's house originated from the same source. This discrimination of paper is presented as both a statistical t-test analysis (99.9% confidence limit) as well as construction of an elemental fingerprint for individual replicates within the questioned and specimen sample populations. This is the first reported use of the comparison of the elemental composition of document paper, determined by ICP-MS, to assist in a criminal investigation.     

Dental age estimation and third molars: a preliminary study

The aim of the present investigation was to reconstruct the chronological age based on the dental developmental stages of third molars evaluated on orthopantomograms. A total of 1175 orthopantomograms were assembled from patients of Caucasian origin between 16 and 22 years of age. Each third molar present was scored by two observers according to a 10-stage developmental scale. The kappa statistics measured the intra- and inter-observer reliability. The general statistical analysis was based on multiple regression analysis in order to obtain multiple regression formulas for dental age estimation based on the number of third molars present on the evaluated orthopantomogram. No regression models were statistically significant when there was only one-third molar present because of the relatively small number of orthopantomograms that fitted this criterion. A strong agreement was found between the intra- and inter-observer measurements. The statistical analysis revealed both for males and females high Pearson correlation coefficients between contralateral third molars and smaller coefficients between antimeres. The obtained multiple regression formulas are only applicable in certain specified conditions, for instance when four third molars are present the following formulas should be used in a Caucasian male "age=10.2000+0.5122UL+0.5273LL" (developmental stage of upper and lower left third molars) or in case of a female "age=13.6206+0.1933UR+0.5080LR" (developmental stage of upper and lower right third molars). This investigation revealed that the chronological age of a Caucasian individual may be estimated based on regression formulas with a S.D. of 1.52 or 1.56 years for males and females, respectively, when all four third molars are present.     

Polymorphism at fifteen hypervariable microsatellite loci in four populations of Maharashtra,India

Polymorphism at 15 microsatellite loci was studied in four predominant, endogamous populations of Maharashtra state in India. The studied population included Marathas, Desasth Brahmins, Chitpavan Brahmins and Dhangars; all of whom belong to Marathi speaking linguistic group of India. The distribution of the allele pattern at 13 tetranucleotide repeat and two pentanucleotide repeat of Powerplex 16 System portrays that these markers are highly polymorphic and thus, informative in human identification and understanding diversity in the addressed populations.     

Genetic variation at 15 autosomal microsatellite loci in the three highly endogamous tribal populations of Orissa,India

Although microsatellite diversity in autosomal chromosomes has been extensively described for many of the Indian populations, there is still a lacuna left on information about the genetic diversity of tribal populations. This paper reports the genetic data on the three tribal populations belonging to the Austroloid ethnic group from Orissa (Juang, Paroja and Saora). The 15 STR (D3S1358, THO1, D21S11, D18S51, PentaE, D5S818, D13S317, D7S820, D16S539, CSF1PO, PentaD, vWA, D8S1179, TPOX, FGA) polymorphism would help to accentuate the STR database for better understanding of population genetics and forensic applications. The microsatellites included in the system are found to be highly polymorphic, with the combined power of exclusion being greater than 0.999, in all the three investigated populations.     

The Peer Appearance Culture During Adolescence: Gender and Body Mass Variations

The purpose of this research was to examine gender and body mass, as factors linked to perceived experiences within the peer appearance culture. The sample included 215 girls and 200 boys who were either in 7th grade or 10th grade. Students provided self-reports on experiences in three domains: appearance culture among friends (appearance conversations and diet/muscle talk), peer evaluations (peer appearance pressure, appearance teasing, and vicarious peer teasing), and peer acceptance concerns (appearance-based acceptance, peer appearance comparison). The results indicated that although girls reported more appearance conversations, boys perceived more appearance pressure and teasing. Boys also admitted that they talked with friends about muscle building at a rate greater than girls talked about dieting. BMI showed distinct gender patterns. BMI was a key attribute that unified the experiences within the appearance culture for overweight girls. Among the boys, BMI was associated with differentiated experiences for underweight and overweight participants.Associate Professor in Educational Psychology at the University of Washington. She is a developmental psychologist specializing in the contributions of peers to body image and social-emotional well-being during adolescence. Research interests include body image during adolescence and gender differences.Doctoral student at the University of Washington in Human Development and Cognition. Her research focuses on the social-emotional development of adolescents, academic and appearance social comparisons, and issues related to gender and science. Research interests include body image during adolescence, gender differences, social comparison, and academic competence.     

Body Image Concerns in Young Girls: The Role of Peers and Media Prior to Adolescence

Peer and media influences have been identified as important conveyors of socio-cultural ideals in adolescent and preadolescent samples. This study aims to explore peer and media influences in the body image concerns and dieting awareness of younger girls, aged 5–8 years. A sample of 128 girls was recruited from the first 4 years of formal schooling. Individual interviews were conducted to assess the aspects of body image, as well as dieting awareness by means of a brief scenario. A number of sources of peer and media influence were examined. It was found that by 6 years of age, a large number of girls desired a thinner ideal figure. Both peer and media influences emerged as significant predictors of body image and dieting awareness. Specifically, girls’ perceptions of their peers’ body dissatisfaction predicted their own level of body dissatisfaction and dieting awareness. Watching music television shows and reading appearance-focused magazines predicted dieting awareness. In particular, girls who looked at magazines aimed at adult women had greater dissatisfaction with their appearance. Thus, the present study highlights that girls aged 5–8 years of age are already living in an appearance culture in which both peers and the media influence body image and dieting awareness.Hayley Dohnt, B. Psych. (Hons.), is completing her Ph.D. in Clinical Psychology at Flinders University. Her major research interests are in the area of child psychology and the development of body image.Marika Tiggemann’s Professor of Psychology at Flinders University. Her major research interest is in media influences on body image. She is Associate Editor for the journal Body Image.     

Psychosocial Resources in First-Year University Students: The Role of Identity Processes and Social Relationships

The investigation involved the assessment of a model predicting that family and university relationship environments are linked with identity processes and identity states (statuses) that predict psychosocial resources among first-year university students. A sample of 351 university students, between the ages of 18 and 21 years, completed measures of psychosocial maturity based on Erikson's notions of ego virtues, a measure of identity processing styles (diffuse-avoidant, normative, and information styles), identity statuses (diffusion, foreclosure, moratorium, and achievement), measures of family climate (conflict, expression, cohesion), and assessments of university relationships with faculty, advisors, and students. Based on linear structural equations, the model, with some adjustments, had a good fit with the data and demonstrates the complex association between perceived family and school climate, identity formation, and the association with psychosocial resources. The investigation demonstrates how multivariate model testing can be completed to assess some of the complexity suggested by Erik Erikson regarding identity formation. Gerald R Adams is a Professor of Family Relations and Human Development at the University of Guelph in Ontario, Canada. His major interests focus on family relations, identity development, education, and prevention. Michael Berzonsky is Professor of Psychology at State University of New York at Cortland, New York. His major interests are identity styles, social cognition, and adolescent development. Leo Keating is a data analyst at the University of Guelph.     

Pubertal Maturation and African American Children’s Internalizing and Externalizing Symptoms

The association of pubertal maturation with internalizing and externalizing symptoms was examined with a sample of 867 African-American 10 – 12-year-old children. Children reported their pubertal development status and timing using a self-report questionnaire, and symptoms were assessed through diagnostic interviews with the children and their primary caregivers. Pubertal status and timing were significantly associated with children's reports of the internalizing symptoms of social anxiety disorder, generalized anxiety disorder, and major depression and with the externalizing symptoms of oppositional defiant disorder, attention deficit disorder, and conduct disorder. Pubertal development also was associated with caregivers’ reports of children's externalizing symptoms. The pubertal transition was associated with internalizing and externalizing symptoms in both boys and girls.Xiaojia Ge is Professor at the University of California, Davis. He received his PhD in sociology from the Iowa State University. He is interested in the influences of biological changes and social transitions on emotional and behavioral development in children and adolescents.Gene H. Brody is a Regents’ Professor at the University of Georgia. He received his PhD in developmental psychology from the University of Arizona. His major research interests are contextual influences on cognitive and psychosocial development, particularly those factors that protect at-risk children and adolescents from negative outcomes.Rand. D. Conger is Professor at the University of California, Davis. He received his PhD in sociology from the University of Washington in Seattle. He is interested in the influences of family economic stress on emotional and behavioral adjustment of family members. He is currently conducting a large-scale study on Mexican American families in California.Dr. Ronald L. Simons is Distinguished Research Professor at the University of Georgia. He received his PhD in sociology from Florida State University. Much of his research has focused upon the manner in which family and community processes combine to influence child development. He has also been concerned with the effect of discrimination and racial socialization upon child adjustment.     

Resolution of Unwanted Pregnancy During Adolescence Through Abortion Versus Childbirth: Individual and Family Predictors and Psychological Consequences

Using data from the National Longitudinal Study of Adolescent Health, various demographic, psychological, educational, and family variables were explored as predictors of pregnancy resolution. Only 2 of the 17 variables examined were significantly associated with pregnancy resolution (risk-taking and the desire to leave home). After controlling for these variables, adolescents who aborted an unwanted pregnancy were more inclined than adolescents who delivered to seek psychological counseling and they reported more frequent problems sleeping and more frequent marijuana use. No significant differences were observed for cigarette smoking, frequency of alcohol use, and problems with parents based on alcohol use after the controls were instituted; however without controls, significant associations were observed, underscoring the importance of the use of psychological and situational controls in studies of the consequences of abortion. The information derived from this study is potentially useful to parents and professionals who provide guidance to adolescents regarding pregnancy resolution.