Adolescent Suicidality: Who Will Ideate,Who Will Act?

Responses to the 1999 Youth Risk Behavior Survey including suicide ideation, attempt, medically treated attempt, and six problem behaviors were analysed. Youth across the spectrum ideated. Overwhelmingly, the 17% of youth with more than three problem behaviors were the youth who acted; they accounted for 60% of medically treated suicidal acts. Compared to adolescents with zero problem behaviors, the odds of a medically treated suicide attempt were 2.3 times greater among respondents with one, 8.8 with two, 18.3 with three, 30.8 with four, 50.0 with five, and 227.3 with six. A count of problem behaviors offers a reliable way to identify suicide risk.     

The Protective Effects of Religious Beliefs on Behavioral Health Factors Among Low Income African American Adolescents in Chicago

Religious involvement has long been argued to have protective effects for negative behavioral health outcomes for vulnerable youth. This study builds on the existing resilience literature and need for more studies that examine protective factors associated with behavioral health. A sample of 638 low-income African American adolescents in Chicago to examine within group variations of the influence of religious involvement on delinquency, school engagement, substance use and sexual risk behaviors, and whether such relationships differ by gender, sexual orientation, and socioeconomic status. Logistic regression findings documented that greater religious involvement was protective with regards to lower rates of delinquency, drug use, risky sexual behaviors and higher rates of school engagement, and that gender, sexual orientation and socioeconomic status varied for several of these relationships. Overall findings are discussed with regards to future research.     

Attributing Responsibility to Female Victims After Exposure to Sexually Violent Films1

We investigate the possibility that the degree to which female abuse victims are held accountable by other women who have been exposed to sexually violent mass media is primarily dependent upon 3 factors: situational relevance, personal similarity, and emotional arousal. Female subjects participated in an experiment. Factors were: film dose; film viewing/victim judgment time interval; victim-subject similarity; and situational relevance of the assault. The results showed less attribution of responsibility to similar victims and high attributions of responsibility to dissimilar victims in the personally relevant assault situation (rape). Women identified least with dissimilar rape victims and most with similar victims when they had not been desensitized. When subjects were desensitized, the defensive attribution effect failed to emerge. There was also a significant tendency among low film dose subjects to perceive more psychological injury and to attribute more distress to the victim than among high film dose subjects.     

Effects of speaking rate and lexical status on phonetic perception

Among the contextual factors known to play a role in segmental perception are the rate at which the speech was produced and the lexical status of the item, that is, whether it is a meaningful word of the language. In a series of experiments on the word-initial /b/-/p/ voicing distinction, we investigated the conditions under which these factors operate during speech processing. The results indicated that under instructions of speeded responding, listeners could, on some trials, ignore some later occurring contextual information within the word that specified rate and lexical status. Importantly, however, they could not ignore speaking rate entirely. Although they could base their decision on only the early portion of the word, when doing so they treated the word as if it were physically short--that is to say, as if there were no later occurring information specifying a slower rate. This suggests that listeners always take account of rate when identifying the voicing value of a consonant, but precisely which information within the word is used to specify rate can vary with task demands.     

Exposure to Verbal Parental Aggression and Sexual Activity Among Low Income African American Youth

The study examined whether witnessing verbal parental aggression (VPA) was related to sexual activity among mostly low income African American youth, and whether psychological symptoms mediated this relationship. Five hundred and sixty-three African American high school adolescents (ages 13–19) completed self-administered questionnaires, which assessed demographics, psychological problems (e.g., depression, anxiety, aggression and posttraumatic stress disorder symptoms), witnessing VPA, and sexual activity. Participants who witnessed high versus no VPA were 2 times more likely to report sexual activity. This relationship was mediated by aggression for males and females, and posttraumatic stress disorder symptoms for females only. Youth service providers should be trained to understand the prevalence of co-occurring problems such as exposure to VPA, aggression, PTSD symptoms, and sexual activity, with the goal of more effectively supporting the healthy development of African American youth.     

The Relationship Between Family Stress and Behavioral Health Among African American Adolescents

African American youth, especially those who live in low-income communities, are at increased risk for experiencing higher juvenile justice involvement, poorer mental health, low school engagement, higher illicit drug use, and STIs, relative to their higher income peers and those from other ethnic backgrounds. However, few studies have examined the relationship between family stressors and these multiple youth concerns. This study examines the relationship between family stress (i.e., having an adult in the home with a history of mental illness, substance use, and incarceration) and youth concerns such as substance use, mental health challenges, low school engagement, juvenile justice involvement, and STI risk behaviors. A total of 638 African American adolescents living in predominantly low-income, urban communities participated in the study by completing self-report measures on the above constructs. Logistic regressions controlling for age, gender, socioeconomic status, and sexual orientation indicated that adolescents who reported higher rates of family stress were significantly more likely to report mental health problems, delinquent behaviors, juvenile justice involvement, drug use, risky sex, and lower school engagement factors. Findings suggest that attending to the developmental concerns of youth also requires addressing the needs of the family unit.     

A finite model theorem for the propositional μ-calculus

We prove a finite model theorem and infinitary completeness result for the propositional -calculus. The construction establishes a link between finite model theorems for propositional program logics and the theory of well-quasi-orders.Supported by NSF grant DCR-8602663     

Maternal Uniparental Isodisomy Causing Autosomal Recessive GM1 Gangliosidosis: A Clinical Report

Uniparental disomy is a genetic cause of disease that may result in the inheritance of an autosomal recessive condition. A child with developmental delay and hypotonia was seen and found to have severely abnormal myelination. Lysosomal enzyme testing identified an isolated deficiency of beta-galactosidase. Subsequently, homozygous missense mutations in the galactosidase, beta 1 (GLB1) gene on chromosome 3 were found. Parental testing confirmed inheritance of two copies of the same mutated maternal GLB1 gene, and no paternal copy. SNP analysis was also done to confirm paternity. The patient was ultimately diagnosed with autosomal recessive GM1 gangliosidosis caused by maternal uniparental isodisomy. We provide a review of this patient and others in which uniparental disomy (UPD) of a non-imprinted chromosome unexpectedly caused an autosomal recessive condition. This is the first case of GM1 gangliosidosis reported in the literature to have been caused by UPD. It is important for genetic counselors and other health care providers to be aware of the possibility of autosomal recessive disease caused by UPD. UPD as a cause of autosomal recessive disease drastically changes the recurrence risk for families, and discussions surrounding UPD can be complex. Working with families to understand UPD when it occurs requires a secure and trusting counselor-family relationship.