Variation in winter microclimate and its potential influence on Virginia opossum (Didelphis virginiana) survival in Amherst,Massachusetts

If climate limits the geographical distribution of a species, local variation in microclimate may affect the species' local distribution at the edge of its range. We hypothesized that warm urban microclimates may explain the distribution of the Virginia opossum (Didelphis virginiana) in central Massachusetts. We recorded winter temperatures with data-logging sensors in urban, coniferous, deciduous, and open habitats in the human-dominated landscape of the Connecticut River Valley of Massachusetts. Overall, temperatures decreased with elevation. Daily maximum temperatures, a variable used in models of opossum biophysical constraints, were lowest at forested sites, intermediate at urban sites, and highest at open sites; however these were a poor indicator of evening temperatures, which are important to the nocturnal opossum. Open sites had the highest daily temperature fluctuations, and were the coldest at night. Urban and coniferous sites had the least pronounced daily fluctuations in temperature, and urban sites had the warmest nights. Habitat-specific winter temperatures in the Connecticut River Valley indicated that urban sites were most conducive to opossum persistence, but even they were unlikely to sustain populations. Other factors likely help mitigate the influence of harsh climatic conditions on persistence of opossum populations in western Massachusetts.     

Who is the victim anyway? The effects of bystander victim impact statements on mock juror sentencing decisions

Victim impact evidence was varied in a brief trial scenario given to 120 participants eligible for jury service. The scenario concerned the murder trial of a disgruntled employee accused of bombing his former workplace. Participants read either no victim impact evidence or one of three victim impact statements. For the victim impact statements, we varied the identity of the witness. The victim impact statement was given by either the wife of the victim, a coworker of the victim, or a firefighter called to the crime scene. Results revealed that only the victim impact evidence given by the coworker lead to harsher sentencing judgments. However, participants rated the suffering of the victim's wife as most severe, indicating that perceptions of suffering may not predict sentencing judgments in a straightforward manner. Implications for these findings for legal decisions such as Payne v. Tennessee (1991) are discussed.     

As the Twig Is Bent: Children Reared in Feminist Households

This is a study of children in families in which both the responsibility for income production and the household division of labor is actually post-gendered. Our data come from a larger study of privileged white parents who intentionally organize their households fairly, sharing housework, child care, and emotion work. These parents deconstruct gender not only by encouraging their daughters and sons to develop free from stereotypes but also by modeling such behavior in their own social roles. The data reported here are based on interviews with the children themselves and home observations. We have drawn two main conclusions. First, children do seem to adopt, uniformly, their parent's non-sexist attitudes but then they must negotiate serious inconsistencies between their beliefs and their lived experiences with peers. They resolve this with a dichotomy: men and women are similar and equal, but boys and girls are different and unequal Second, personal identities seem to be forged more from lived experiences than from ideology.     

Extrapolating human probability judgment

We advance a model of human probability judgment and apply it to the design of an extrapolation algorithm. Such an algorithm examines a person's judgment about the likelihood of various statements and is then able to predict the same person's judgments about new statements. The algorithm is tested against judgments produced by thirty undergraduates asked to assign probabilities to statements about mammals.     

A multitrait-multimethod investigation of interpersonal distance

Prior research has investigated the validity of interpersonal distance measures with respect to only one trait — comfort. This study expanded the previous research by measuring interpersonal distance along the trait dimensions of comfort, control and privacy. In addition, measures were taken along three different measurement techniques: stop distance, silhouette placement, and a paper and pencil measure (CID). The results were interpreted in terms of a multitrait-multimethod matrix. Results indicated that these measures were reliable and valid and the traits did have convergent validity. However, all of these measures were uncorrelated with a disguised distance measure of interpersonal distance.     

Substance Use Among Rural African American Adolescents: Identifying Risk and Protective Factors

Substance use continues to be a significant problem among youth in our society, particularly in rural communities. The purpose of the current study was to identify the possible risk and protective factors that may be affecting the rates of alcohol and illegal drug use among a population of African American adolescents living in a rural, southern community. The following were identified as possible risk factors: (1) Being an older adolescent (15 years of age or older); (2) Spending afternoons after school with friends; (3) Having friends or family members who use alcohol or illegal drugs; (4) Being raised by non-family members; and (5) Having plans to enter military after high school. The following characteristics were associated with less alcohol and illegal drug use, and were identified as possible protective factors: (1) Being raised by parent(s) or other family members; (2) Spending afternoons after school with parents; (3) Having parents who talk to youth about dangers of drug and alcohol use; (4) Having parents who disapprove of their child using drugs or alcohol; (5) Being involved in extra-curricular church-related activities; and (6) Having plans to work, or attend college or technical school after high school. Characteristics that have been associated with drug and alcohol in previous research that were not associated with use in the current study include: (1) Being male; (2) Peer pressure to use alcohol or illegal drugs; (3) Grades in school; and (4) Involvement in extra-curricular activities. Implications for developing effective community programs aimed at reducing substance use among our youth are discussed.     

Cohort disaggregation analysis of fertility data from a sample survey

Social differentials in cumulative fertility revealed by field surveys in a number of countries typically have been interpreted with the implicit assumption that the timing of childbearing within the reproductive period remains constant. However, the reproductive histories that have been collected in such surveys provide a largely unexploited source of data for the analysis of trends in timing. An analysis by birth cohort of the fertility experience of 592 ever-married women surveyed in San Juan, Puerto Rico, in 1966 shows that significant changes in timing have occurred. Women in the more recent birth cohorts are distinguished by earlier childbearing and sustained higher fertility in consecutive age periods. The inter-cohort differences remain when adjustments are made for duration of time in legal and consensual unions.