On the Alias Method for Generating Random Variables from a Discrete Distribution

The alias method of Walker is a clever, new, fast method for generating random variables from an arbitrary, specified discrete distribution. A simple probabilistic proof is given, in terms of mixtures, that the method works for any discrete distribution with a finite number of outcomes. A more efficient version of the table-generating portion of the method is described. Finally, a brief discussion on efficiency of the method is given. We believe that the generality, speed, and simplicity of the method make it attractive for use in generating discrete random variables.     

Career Decision State and Assessment of RIASEC Interest Structure

The career decision state (CDS) was studied in relation to RIASEC (Realistic, Investigative, Artistic, Social, Enterprising, Conventional) profiles in Self-Directed Search results among college students (86 women, 27 men). Three CDS dimensions measured by the Career State Inventory (CSI; certainty, satisfaction, and clarity) were examined as predictors of RIASEC primary and secondary constructs. Significant, albeit modest, zero-order correlations (p < .05) emerged between clarity and 3 secondary constructs (i.e., consistency, commonness, and coherence). Results of regression analyses indicated that CSI dimensions predicted 1 secondary construct (i.e., commonness).     

Changing Social Work Students’ Perceptions of the Role of Government in a Policy Class

Understanding student political attitudes—feelings about government and perceptions of its role—has long been of interest to social scientists. One factor that may influence political attitudes is belief in a just world, a complex psychological construct well established in the literature. Our study explores changes in social work students’ perception of a supportive role of government and their beliefs in a just world after one policy course using a pretest and posttest design. Student perceptions changed toward a more supportive government role, but there was no significant change for belief in a just world. The study contributes to empirical evaluation of the social work education policy class in terms of the Council on Social Work Education competencies.     

Predicting Adolescent Autonomy from Parents: Relationship Connectedness and Restrictiveness

This study examined the extent to which adolescents'behavioral autonomy was predicted by several aspects of the parent-youth relationship that are encompassed by the general constructs connectedness and restrictiveness. Both of these general relationship constructs are composed of more specific social-psychological predictors consisting of parental behaviors, parent-adolescent authority dimensions, and indicators of family ties. A total of 657 adolescents (mean age = 16.3 years) and 753 parents responded to self-report questionnaires. Hierarchical multiple regression analyses were used to test the hypotheses from both the adolescents'and parents'perspectives in separate models. Many of the predictions were confirmed, indicating that adolescent behavioral autonomy often develops within contexts of relationship connectedness, such as continuing parent-youth authority and supportiveness. Moreover, as expected, youthful autonomous behavior was inhibited by such aspects of relationship restrictiveness as punitive behavior and the perceived coercive abilities of parents.     

Racial Segregation,the Concentration of Disadvantage,and Black and White Homicide Victimization

Discriminatory housing market practices have created and reinforced patterns of racial residential segregation throughout the United States. Such segregation has racist consequences too. Residential segregation increases the concentration of disadvantage for blacks but not whites, creating African-American residential environments that heighten social problems including violence within the black population. At the same time, segregation protects white residential environments from these dire consequences. This hypothesized racially inequitable process is tested for one important type of violence—homicide. We examine race-specific models of lethal violence that distinguish residential segregation from the concentration of disadvantage within racial groups. Data are from the Censuses of Population and Federal Bureau of Investigation's homicide incidence files for U.S. large central cities for 1980 and 1990. Our perspective finds support in the empirical analyses. Segregation has an important effect on black but not white killings, with the impact of segregation on African-American homicides explained by concentrated disadvantage.     

Adolescents' attention to traditional and graphic tobacco warning labels: an eye-tracking approach

The objective of this study was determine if the inclusion of Canadian-style graphic images would improve the degree to which adolescents attend to, and subsequently are able to recall, novel warning messages in tobacco magazine advertising. Specifically, our goal was to determine if the inclusion of graphic images would (1) increase visual attention, as measured by eye movement patterns and fixation density, and (2) improve memory for tobacco advertisements among a group of 12 to 14 year olds in the western United States. Data were collected from 32 middle school students using a head-mounted eye-tracking device that recorded viewing time, scan path patterns, fixation locations, and dwell time. Participants viewed a series of 20 magazine advertisements that included five U.S. tobacco ads with traditional Surgeon General warning messages and five U.S. tobacco ads that had been modified to include non-traditional messages and Canadian-style graphic images. Following eye tracking, participants completed unaided- and aided-recall exercises. Overall, the participants spent equal amounts of time viewing the advertisements regardless of the type of warning message. However, the warning messages that included the graphic images generated higher levels of visual attention directed specifically toward the message, based on average dwell time and fixation frequency, and were more likely to be accurately recalled than the traditional warning messages.     

Positive Changes in Perceptions and Selections of Healthful Foods by College Students After a Short-Term Point-of-Selection Intervention at a Dining Hall

Abstract

Objective: Determine the effects of a short-term, multi-faceted, point-of-selection intervention on college students’ perceptions and selection of 10 targeted healthful foods in a university dining hall and changes in their self-reported overall eating behaviors. Participants: 104 college students, (age 18–23) completed pre-I and post-I surveys. Methods: Pre-survey collected at dining hall in April 2007, followed by 3-week intervention then post-survey collected via email. Healthy choice indicators, large signs, table tents, flyers and colorful photographs with “benefit-based messages” promoted targeted foods. Response rate to both surveys was 38%. Results: Significantly more participants reported that healthful choices were clearly identified in the dining hall after the intervention. Over 20% of participants reported becoming more aware of healthful food choices in the dining hall after the intervention. Significant increases in self-reported intake were reported for cottage cheese and low-fat salad dressing, with a trend toward increased consumption of fresh fruit. Seven of the 14 assessed eating behaviors had significant changes in the desired direction. Increased awareness of healthful foods was the top reason for self-reported changes in overall eating behaviors. Conclusion: Short-term, multi-faceted, point-of-selection marketing of healthful foods in university dining halls may be beneficial for improving college students’ perceptions and selections of targeted healthful foods in the dining hall and may improve overall eating behaviors of college students.     

The Lies That Bind: Heteronormative Constructions of “Family” in Social Work Discourse

The social work profession has an enduring history of commitment to American families; in fact, it has often led the way in embracing alternative family arrangements. Lesbian, gay, bisexual, transgender, and queer (LGBTQ) families are gaining more political visibility and lobbying for rights and protections from which they were previously excluded. Therefore, this study is an analysis of social work's contemporary, defining representations of LGBTQ families. Twelve LGBTQ “family” research studies were culled from the database Social Work Abstracts, and subjected to queer discourse analysis in order to illuminate how these alternative family forms are being constructed within the discipline. This analysis details the multiple ways in which heterosexual norms are privileged throughout the research studies. For example, the heterosexual family is often constructed as an unchallenged index for psychological health, appropriate partnering, and child rearing practices, social acceptability, and general normative behavior. LGBTQ relationships often earn their “family” designations by their ability to approximate these legible, heteronormative “family” characteristics. As such, this queer discourse analysis indicates that LGBTQ families are ultimately invited to join, but not to change, the traditional terms of “family,” thus making the social work research less of an exploration of alternative family forms and more of an endorsement of same-sex, nuclear families.     

Chinese Parenting Behaviors,Adolescent School Adjustment,and Problem Behavior

The present research examined the relationship between supportive and controlling dimensions of parenting behaviors and Chinese adolescent outcomes (school adjustment and problem behavior). Researchers collected self-report data from 589 adolescents in Hangzhou, China. Results showed the factor structure for the Parent Behavior Measure in the Chinese sample was different from the factor structure based on Western research. Specifically, paternal support did not emerge as a viable factor. Parental monitoring and involvement predicted positive adolescent outcomes, whereas punitiveness and permissiveness predicted negative outcomes. Surprisingly, maternal support predicted more adolescent problem behavior, especially for boys. Guilt induction, love withdrawal, and positive induction did not predict any significant adolescent outcomes when other parenting behaviors were controlled. School adjustment mediated and gender moderated the relationship between parenting and adolescent problem behavior. The importance of considering parenting behaviors, adolescent school adjustment, gender, and cultural norms when examining adolescent problem behavior was discussed.