A comparison of stimulus preference assessment methods in adults with schizophrenia

Three methods of assessing preference for stimuli were compared in four adults with a diagnosis of schizophrenia. During phase 1, a survey method, a verbal stimulus choice method, and a pictorial stimulus choice method of assessing preference for four categories of stimuli were administered. During phase 2, a coupon system was used to determine which categories of stimuli actually functioned as reinforcers for each participant. Comparisons between the three preference assessment methods were then conducted based on the results of the reinforcer assessment. Results showed that, overall, there were few differences in total accuracy among the preference assessment procedures. Copyright © 2003 John Wiley & Sons, Ltd.     

Institutional identity, integrity, and conscience

Bioethics has focused on the areas of individual ethical choices -- patient care -- or public policy and law. There are however, important arenas for ethical choices that have been overlooked. Health care is populated with intermediate arenas such as hospitals, nursing homes, hospices, and health care systems. This essay argues that bioethics needs to develop a language and concepts for institutional ethics. A first step in this direction is to think about institutional conscience.     

Interpersonal effects of parents and adolescents on each other’s health behaviours: a dyadic extension of the theory of planned behaviour

Objective: Interpersonal relationships are important predictors of health outcomes and interpersonal influences on behaviours may be key mechanisms underlying such effects. Most health behaviour theories focus on intrapersonal factors and may not adequately account for interpersonal influences. We evaluate a dyadic extension of the Theory of Planned Behaviour by examining whether parent and adolescent characteristics (attitudes, subjective norms, perceived behavioural control and intentions) are associated with not only their own but also each other’s intentions/behaviours.

Design: Using the Actor-Partner Interdependence Model, we analyse responses from 1717 parent-adolescent dyads from the Family Life, Activity, Sun, Health, and Eating study.

Main Outcome Measures: Adolescents/parents completed self-reports of their fruit and vegetable consumption, junk food and sugary drinks consumption, engagement in physical activity, and engagement in screen time sedentary behaviours.

Results: Parent/adolescent characteristics are associated with each other’s health-relevant intentions/behaviours above the effects of individuals’ own characteristics on their own behaviours. Parent/adolescent characteristics covary with each other’s outcomes with similar strength, but parent characteristics more strongly relate to adolescent intentions, whereas adolescent characteristics more strongly relate to parent behaviours.

Conclusions: Parents and adolescents may bidirectionally influence each other’s health intentions/behaviours. This highlights the importance of dyadic models of health behaviour and suggests intervention targets.     

How do we optimize message matching interventions? Identifying matching thresholds,and simultaneously matching to multiple characteristics

Matching the content of persuasive messages to the characteristics (e.g., motives, personality) of people receiving them is a widely used technique to improve persuasion. However, little is known about how to optimize matching beyond simply using the technique. We propose that matching interventions can be strengthened by matching messages to multiple characteristics at a time, and introduce the concept of matching thresholds to improve the way interventionists assign messages. Matching thresholds are defined as the points along characteristics where people change from being most responsive to one message type to another. We provide statistical and methodological tools to estimate matching thresholds, and evaluate these tools in two simulation studies. We then report an online experiment (N = 568) where we find an advantage for simultaneously matching messages to two characteristics (promotion focus and interdependent self-construal) and provide estimates of the matching thresholds to guide the assignment of gain/loss frames and independence/interdependence appeals.