Reducing demand for ineffective health remedies: overcoming the illusion of causality

Abstract

Objective: We tested a novel intervention for reducing demand for ineffective health remedies. The intervention aimed to empower participants to overcome the illusion of causality, which otherwise drives erroneous perceptions regarding remedy efficacy.

Design: A laboratory experiment adopted a between-participants design with six conditions that varied the amount of information available to participants (N?=?245). The control condition received a basic refutation of multivitamin efficacy, whereas the principal intervention condition received a full contingency table specifying the number of people reporting a benefit vs. no benefit from both the product and placebo, plus an alternate causal explanation for inefficacy over placebo.

Main outcome measures: We measured participants’ willingness to pay (WTP) for multivitamin products using two incentivized experimental auctions. General attitudes towards health supplements were assessed as a moderator of WTP. We tested generalisation using ratings of the importance of clinical-trial results for making future health purchases.

Results: Our principal intervention significantly reduced participants’ WTP for multivitamins (by 23%) and increased their recognition of the importance of clinical-trial results.

Conclusion: We found evidence that communicating a simplified full-contingency table and an alternate causal explanation may help reduce demand for ineffective health remedies by countering the illusion of causality.     

A randomised controlled trial of a brief online mindfulness-based intervention

ObjectivesThere is growing evidence that mindfulness has positive consequences for both psychological and physical health in both clinical and non-clinical populations. The potential benefits of mindfulness underpin a range of therapeutic intervention approaches designed to increase mindfulness in both clinical and community contexts. Self-guided mindfulness-based interventions may be a way to increase access to the benefits of mindfulness. This study explored whether a brief, online, mindfulness-based intervention can increase mindfulness and reduce perceived stress and anxiety/depression symptoms within a student population.MethodOne hundred and four students were randomly allocated to either immediately start a two-week, self-guided, online, mindfulness-based intervention or a wait-list control. Measures of mindfulness, perceived stress and anxiety/depression were administered before and after the intervention period.ResultsIntention to treat analysis identified significant group by time interactions for mindfulness skills, perceived stress and anxiety/depression symptoms. Participation in the intervention was associated with significant improvements in all measured domains, where no significant changes on these measures were found for the control group.ConclusionsThis provides evidence in support of the feasibility and effectiveness of shorter self-guided mindfulness-based interventions. The limitations and implications of this study for clinical practice are discussed.     

An Evaluation of an HIV/AIDS Prevention Program in a Nigerian Setting

The study examined the success of a group based behavioural intervention with Nigerian youths aimed at reducing the risk of contracting and spreading HIV/AIDS and other sexually transmitted illness (STI). Participants were 147 youths (males=75, females=72, age range 5 to 24 years). The study explored the influence of motivational factors (self efficacy), attitudinal factors (perceived personal risk), knowledge (instrumental knowledge of AIDS) and behavioural factors (refusal of high-risk behaviour) in predicting condom use amongst youth participating in a group-based HIV prevention intervention. Findings indicated that the intervention program reliably predicted participants' attitudinal dispositions to high risk heterosexual behaviour. Instrumental knowledge of HIV/AIDS, perceived self-efficacy, perceived personal risk of HIV/AIDS and refusal of risk behaviour were significant predictors of condom use.     

Children with Attention Deficit Hyperactivity Disorder

ABSTRACT

It is estimated that there have been over 4,000 articles in the literature on the subject of attentional problems, addressing its etiology, epidemiology, assessment, diagnosis, and treatment. This article reviews recent and relevant literature with an eye toward functional conclusions and linkages between assessment and intervention. The article concludes by providing a problem-solving model that integrates parent or teachers' referral concerns, reasons for these concerns, assessment methods, and intervention strategies. In the end, four definitive conclusions are drawn, and the importance of multimodal strategies that collaboratively involve home, school, and community settings is emphasized.     

The Microcomputer as Perceptual Tool:

The microcomputer as a medium of instruction is not inherently better or worse than any other medium be it lecture, television, print or practical experience. However, the microcomputer can simultaneously present instruction and collect data on student performance. In order for educators to evaluate the success of instruction presented by computer they must use the microcomputer as a perceptual tool to more sensitively monitor and modify the educational process. Thoughtful consideration of monitoring data by special educators promises to make the microcomputer a revolutionary aspect of school instruction. Such an educational revolution can extend to the delivery of special services provided that the time and ancillary supports needed to utilize performance are made available to school personnel.     

The Influence of Religiosity,Family-of-Origin,and Self-Efficacy on Depression in Older Adults

ABSTRACT

In this study, the influence of religiosity, self-efficacy, and family-of-origin on depression was examined. In addition, the associations of race, gender, and age on these variables were analyzed. A total of 81 older persons, 56% white and 44% black, and approximately the same number of males and females, were recruited from public housing, a senior citizens organization, and a private community dwelling. Results indicated that a number of associations were significant between race, gender, religion, and age. No gender or race differences were associated with self-efficacy or depression. Multiple regression analysis was utilized to examine the role of self-efficacy, family-of-origin, and religiosity on depression of older adults. Significant causal effects were found for the influence of religiosity and family-of-origin on self-efficacy and the influence of self-efficacy on depression.     

Arousal interventions for athletic performance: Influence of mental preparation and competitive experience

Abstract

Mental preparation, or “psych-up” strategies have been assumed to promote physical arousal which subsequently improves certain athletic performances. The present experiment examined the role of arousal changes in the use of psych-up strategies on a physical strength task and a reaction time-decision task for subjects varying in competitive experience. Eighty-four subjects were reliably divided into high, moderate, or low competitive experience groups and randomly assigned to one of three mental preparation strategies. These strageies, which the subjects employed during a mental preparation period for both tasks, were either: (a) a self-generated arousal strategy, (b) a prescribed arousal strategy, or (c) a placebo-control strategy. While heart rate was being monitored, each subject completed a baseline trial, then one trial following a 45 sec mental preparation period and one trial following a 45 sec distraction interval. Order of presentation of tasks and order of presentation of distraction and mental preparation trials were counterbalanced and statistically analyzed. The results support the utility of different mental preparation strategies for increasing strength performance, but not reaction time-decision performance, for subjects with moderate and high levels of previous competitive experience. Self-generated arousal strategies enhanced performance of moderate experienced subjects. Analyses of the heart rate data failed to support the assumption that physiological arousal mediates the influence of psych-up strategies. Mental preparation strategies improved athletes' performance on certain tasks, however these strategies do not necessarily achieve their effects through increased autonomic arousal.     

My Disaster Recovery: a pilot randomized controlled trial of an Internet intervention

Abstract

This pilot study tested the efficacy of the My Disaster Recovery (MDR) website to decrease negative affect and increase coping self-efficacy. Fifty-six survivors of Hurricane Ike were recruited from a larger study being conducted at the University of Texas Medical Branch at the first anniversary of the storm. Restricted randomization was used to assign participants to the MDR website, an information-only website, or a usual care condition. Group×time interactions indicated that MDR reduced participant worry more than the other conditions. A similar trend was also identified for depression. Both websites were accessed a small to moderate amount and participants reported mixed satisfaction for both websites. Although the effect sizes for worry and depression were in the moderate to large range, small sample size and timing of the intervention qualify the findings. These preliminary findings encourage further evaluation of MDR with a larger, demographically diverse sample and indicate that the MDR website might be helpful in reducing worry and depression.     

PTSD and Epigenetic Research: Decentering the Physical Body

To prevent youth violence, the GREAT Families program was implemented with a selective sample of 1,196 families of sixth-grade children from low-income schools in 4 cities making the transition to adolescence. To assess intervention effects, we used pre- and posttest data to estimate a structural model to test the hypothesis that random assignment to the intervention would predict changes in parenting practices, which in turn would predict changes in exposure to violence (i.e., a mediational model). We found that participation in GREAT was significantly related to changes in parenting practices and these changes significantly predicted changes in violence exposure. Furthermore, adolescents who reported greater increases in exposure to violence also tended to experience greater decreases in parental monitoring, discipline, and involvement. Implications for future research and prevention efforts are discussed.