Using Participatory System Dynamics Modeling to Examine the Local HIV Test and Treatment Care Continuum in Order to Reduce Community Viral Load

Achieving community‐level goals to eliminate the HIV epidemic requires coordinated efforts through community consortia with a common purpose to examine and critique their own HIV testing and treatment (T&T) care system and build effective tools to guide their efforts to improve it. Participatory system dynamics (SD) modeling offers conceptual, methodological, and analytical tools to engage diverse stakeholders in systems conceptualization and visual mapping of dynamics that undermine community‐level health outcomes and identify those that can be leveraged for systems improvement. We recruited and engaged a 25‐member multi‐stakeholder Task Force, whose members provide or utilize HIV‐related services, to participate in SD modeling to examine and address problems of their local HIV T&T service system. Findings from the iterative model building sessions indicated Task Force members’ increasingly complex understanding of the local HIV care system and demonstrated their improved capacity to visualize and critique multiple models of the HIV T&T service system and identify areas of potential leverage. Findings also showed members’ enhanced communication and consensus in seeking deeper systems understanding and options for solutions. We discuss implications of using these visual SD models for subsequent simulation modeling of the T&T system and for other community applications to improve system effectiveness.     

Something new under the Sun: forty years of philosophy of religion, with a special look at process philosophy

Looking back over the last 40 years of work in the philosophy of religion provides a fascinating vantage point from which to assess the state of the discipline today. I describe central features of American philosophy of religion in 1970 and reconstruct the last 40 years as a progression through four main stages. This analysis offers an overarching framework from which to examine the major contributions and debates of process philosophy of religion during the same period. The major thinkers, topics, positions, and controversies are presented, analyzed, and critiqued. In the concluding section I offer a critical appraisal of the state of the field today based on the results of these historical analyses.     

From reorienting of attention to biased competition: Evidence from hemifield effects

When a distractor was presented simultaneously with or directly following a target, it produced more interference when it was presented in the same visual hemifield as the target than when it was presented in the opposite visual field. This result is interpreted in terms of biased competition; there is more competition between stimuli when they are presented in the same visual field, rather than in opposite visual fields. However, when the distractor was presented 125 msec or more prior to the target, this pattern was reversed. In those cases, there was more distractor interference when target and distractor were presented in opposite visual fields. This can be explained by assuming that attention was captured by the distractor, and that there was an additional cost of reorienting to a location in the opposite visual field.     

Incidental environmental anchors

Three studies examined whether potential anchor values that are incidentally present in the environment can affect a person's numerical estimates. In Study 1, estimates of an athlete's performance were influenced by the number on his jersey. In Study 2, estimates of the proportion of sales in the domestic market were influenced by a product's model number. In Study 3, participants' estimates of how much they would spend at a restaurant were influenced by whether the restaurant was named “Studio 17” or “Studio 97.” These effects were not qualified by participants' expertise in the relevant domain (Study 1) or by their ability to subsequently recall the anchor value (Study 3). These findings document the existence of a new form of “basic anchoring” and suggest that not all basic anchoring effects are as fragile as the existing anchoring literature suggests. Copyright © 2007 John Wiley & Sons, Ltd.     

Motivation and memory in zebra finch (<Emphasis Type="Italic">Taeniopygia guttata</Emphasis>) foraging behavior

Remembering combinations of information such as what resources have been seen in which locations could play an important role in enhancing individual survival through increased foraging success. To date, there have been relatively few investigations of avian memory involving more than one category of information. This study explored zebra finches’ (Taeniopygia guttata) capacity to recall two categories in combination, namely food-type and spatial location. Birds were trained to remove variously weighted flaps to find two types of food hidden beneath. Memory for food-types and locations was assessed by pre-feeding the birds to satiety on and devaluing one food-type, and then testing the birds’ efficiency at finding the non-devalued food. When allowed one trial to learn locations of two food rewards that were hidden beneath lightly weighted flaps, birds performed better than chance at locating a food reward. However, they did not preferentially search for the non pre-fed food, suggesting that they were unable to recall both food type and location in combination. Zebra finches made fewer errors when tested on the one-trial task using more heavily weighted flaps than with lightly weighted flaps; there was equivocal evidence that they remembered which food type was hidden where on this task. When given repeated exposures to the locations of the two food rewards, finches located a food reward more accurately than on the one-trial tasks, and were also more likely to recall the locations of the different food types. In this foraging paradigm, experience and motivation may have influenced the birds’ performance.     

Initial Reliability and Validity of the Life Satisfaction Scale for Problem Youth in a Sample of Drug Abusing and Conduct Disordered Youth

Responses to Life Satisfaction Scale for Problem Youth (LSSPY) items were examined in a sample of 193 substance abusing and conduct disordered adolescents. In responding to the LSSPY, youth endorse their percentage of happiness (0 to 100%) in twelve domains (i.e., friendships, family, school, employment/work, fun activities, appearance, sex life/dating, use of drugs, use of alcohol, money/material possessions, transportation, control of one's life). Results indicated that the LSSPY yielded three factor structures (i.e., Social Satisfaction, External Obligations Satisfaction, Substance Use Satisfaction), demonstrated good initial psychometric properties, and appears to be a useful instrument in the evaluation of treatment outcome in problem youth. Males were more satisfied in the Social and External Obligations domains than females, although no gender differences were indicated in Substance Use Satisfaction. Caucasian, African-American, and Hispanic youths responded to LSSPY items similarly. Future directions are discussed in light of these results.     

A Cognitive Model of Customer‐Based Brand Equity for Frequently Purchased Products: Conceptual Framework and Empirical Results

The main purpose of this research is to identify the underlying cognitive structure of brand equity. Existing research on brand equity is used to identify 4 cognitive “components” of customer‐based brand equity. These are labeled as global brand attitude, strength of preference, brand knowledge, and brand heuristic. A conceptual framework of how these components (or subconstructs) are interrelated is proposed and empirically tested using data from 2 frequently purchased product categories. Covariance structure modeling is used as the analysis methodology. The results indicate that all the identified cognitive components are important determinants of customer‐based brand equity. Specifically, the brand heuristic component serves as an important mediator in 2 “cognitive chains” that link global brand attitude to brand knowledge and global brand attitude to strength of preference, respectively. The study findings have important implications for designing equity maintenance strategies for frequently purchased products.     

Impact of Gender and Problem Severity upon Intervention Selection

The extent to which prejudicial views of both genders influence college students' clinical evaluations was investigated. Primarily White and working-class students listened to 1 of 4 audiotapes of either a male or a female actor with identical major or minor psychological problems. Participants selected 1 of 4 intervention levels (no intervention, workshops/seminars, counselor, or psychiatrist) for the actor and for themselves if they were to experience the actor's problems. The results indicated that both actor gender and participant gender influenced intervention choice. Participants, especially men, tended to select a higher intervention level for the actor than for themselves. These findings are congruent with the self-serving biases exhibited in therapeutic contexts and support the position that gender affects clinical decisions.     

Body Image Concerns and Contingent Self-Esteem in Male and Female College Students

Body dissatisfaction in females, and to a lesser extent males, is associated with low self-esteem, depression, and eating disorders. This research examined gender as a moderator of the association between contingent self-esteem and body image concerns, including weight and muscularity. Participants included 359 (59.1% female) heavy drinking first-year U.S. undergraduate students who completed a survey assessing health-related risk behaviors. Hierarchical multiple regression was used to examine relations among gender, contingent self-esteem, and body image. Females reported higher levels of contingent self-esteem and greater concerns about their weight, although males reported a greater drive for muscularity. The relationship between contingent self-esteem and weight concerns was stronger among females, and for males, greater contingent self-esteem was associated with a greater drive for muscularity.     

Subjective decision making in medical school admissions: Potentials for discrimination

Medical schools place considerable emphasis on admissions interviews in the selection of students. Interviews, with unwritten performance criteria and subjective evaluation, contain the potential for unconscious discrimination against certain groups of applicants. This study investigates the contribution of interview scores to the total evaluation of male and female applicants for admission to one medical school in the United States. Findings reveal that interveiw scores are counted more heavily for females than males in arriving at a final ranking for admission. Further, females were rated lower in general than males on interview evaluations. While the magnitude of the associations is small, the combined effect points to a potential for discrimination, however unintended, against women applicants in the present case study.The authors appreciate the valuable criticisms of and comments on an earlier draft from Drs. Sidney Fleming, Dorothy Brinsfiled, Glenn Clark, Maurice Jurkiewicz, and Michael Kutner, some of whom may still take exception to parts of this article.