Ongoing physical activity advice by humans versus computers: the Community Health Advice by Telephone (CHAT) trial.

PURPOSE: Given the prevalence of physical inactivity among American adults, convenient, low-cost interventions are strongly indicated. This study determined the 6- and 12-month effectiveness of telephone interventions delivered by health educators or by an automated computer system in promoting physical activity. DESIGN: Initially inactive men and women age 55 years and older (N = 218) in stable health participated. Participants were randomly assigned to human advice, automated advice, or health education control. MEASURES: The validated 7-day physical activity recall interview was used to estimate minutes of moderate to vigorous physical activity. Physical activity differences by experimental arm were verified on a random subsample via accelerometry. RESULTS: Using intention-to-treat analysis, at 6 months, participants in both interventions, although not differing from one another, showed significant improvements in weekly physical activity compared with controls. These differences were generally maintained at 12 months, with both intervention arms remaining above the target of 150 min per week of moderate to vigorous physical activity on average. CONCLUSION: Automated telephone-linked delivery systems represent an effective alternative for delivering physical activity advice to inactive older adults.     

Making Better Sense of Animal Disenhancement: A Reply to Henschke

In "Making Sense of Animal Disenhancement" Adam Henschke provides a framework for fully understanding and evaluating animal disenhancement. His conclusion is that animal disenhancement is neither morally nor pragmatically justified. In this paper I argue that Henschke misapplies his own framework for understanding disenhancement, resulting in a stronger conclusion than is justified. In diagnosing his misstep, I argue that the resources he has provided us, combined with my refinements, result in two new avenues for inquiry: an application of concepts from political theory to disenhancement, and an inquiry in to the mode of valuation that underlies industrial animal agriculture and disenhancement proposals.     

Mixing Interest and Control? Assessing Peter Vallentyne’s Hybrid Theory of Rights

The relationship between libertarianism and state is a contested one. Despite pressing full and strict ownership of one’s person and any justly acquired goods, many libertarians have suggested ways in which a state, albeit limited, can be regarded as just. Peter Vallentyne has proposed that all plausible versions of libertarianism are compatible with what he calls ‘private-law states’. His proposal is underpinned by a particular conception of rights, which brings Interest Theory of rights and Will Theory of rights together. If convincing, Vallentyne’s theory of rights enables libertarians to accommodate a limited but nevertheless coercive state that can act without the full consent of the affected citizen. In this paper, it is argued that Vallentyne’s hybrid theory of rights is implausible from a libertarian perspective as well as fails to align itself with common and deeply held moral intuitions. Hence the conflict between mainstream libertarianism and the state is not solved by Vallentyne’s proposal.     

What do we really know about witness preparation?

Witnesses often meet with an attorney or witness preparation specialist before trial to review, discuss, and sometimes modify the substance and delivery of their anticipated testimony. This process is commonly referred to as witness preparation. During witness preparation, witnesses are taught to use effective testimony delivery skills (e.g., verbal and nonverbal communication skills) so that they will be perceived as being credible and persuasive in the courtroom. Although social scientists know much about communication skills, credibility, and persuasion, few published studies have attempted to determine whether or not these factors can be modified through witness preparation training. The present article reviews the psychological literature pertaining to witness preparation and makes recommendations for needed witness preparation research.     

Reevaluating the initial impact of John Broadus Watson on American psychology: The necessity of comparative parameters

In recent decades, various studies have challenged the traditional view that John Broadus Watson's Behaviorist Manifesto prompted a psychological revolution. However, methodological hindrances underlie all these attempts to evaluate the impact of Watson's study, such as the absence of comparative parameters. This article remedies this problem by conducting a comparative citation analysis involving Watson and eight other representative psychologists of the time: J. R. Angell, H. Carr, J. M. Cattell, J. Dewey, G. S. Hall, W. James, E. L. Thorndike, and E. B. Titchener. Eight important American journals were scrutinized for the period between 1903 and 1923, a decade before and a decade after the publication of Watson's Manifesto. The results suggest that even if Watson's study cannot be taken as revolutionary, it had an impact between 1914 and 1923 that was close to Dewey's, Titchener's, and Thorndike's and higher than Angell's, Carr's, Cattell's, and Hall's, although distant from James's. Finally, some methodological implications of this study are discussed.     

Mindfulness training for loneliness among Chinese college students: A pilot randomized controlled trial

Loneliness has been found to predict a wide range of physical and mental health problems. It is suggested that China's One‐Child Policy places young Chinese people at a particularly high risk for loneliness. Although loneliness is most prevalent in late adolescence and early adulthood, interventions have primarily targeted children or older adults with limited success. The current study examines a pilot randomized controlled trial of a mindfulness training program among Chinese college students. Participants with elevated loneliness (N = 50, ages 17–25) were randomized into either an 8‐week mindfulness training or a control group. Self‐reported measures of loneliness and mindfulness were administered at baseline and posttest. The training group also completed a program evaluation form and a 3‐month follow‐up assessment. Results provided preliminary evidence indicating that the intervention was feasible and effective at reducing loneliness among Chinese college students. Limitations and future directions were discussed.     

The role of sparsely distributed representations in familiarity recognition of verbal and olfactory materials

We present the generalized signal detection theory (GSDT), where familiarity is described by a sparse binomial distribution of binary node activity rather than by normal distribution of familiarity. Items are presented in a distributed representation, where each node receives either noise only, or signal and noise. An old response (i.e., a “yes” response) is made if at least one node receives signal plus noise that is larger than the activation threshold, and item variability is determined by the distribution of activated nodes as the threshold is varied. A distinct representation leads to better performance and a lower ratio of new to old item variability, than a more distributed and less distinct representations. Here we apply the GSDT to empirical data on verbal and olfactory memory and suggest that verbal memory relies on a distinct neural item representation, whereas olfactory memory has a fuzzy neural representation leading to poorer memory and inducing a larger ratio of new to old item variability.     

Social support as a mediator in the relation between sensation seeking (need for stimulation) and psychological adjustment in older adults

This article investigates the potential role of social support as a mediator between sensation seeking (in the sense of a basal need for stimulation) and psychological adjustment in older adults. A sample of 325 individuals aged between 65 and 95 years were tested using questionnaires, which assess social support, sensation seeking, global self-worth, sense of coherence, and satisfaction with life. Path analyses provided support for a mediator model in which the relationship between sensation seeking and psychological adjustment was fully mediated by social support (the path coefficient between sensation seeking and psychosocial adjustment declines from β = .27 to β = .02, when adding an indirect path mediated by social support). Findings further suggest that this mediation effect was independent of sex and age. The study demonstrates the relevance of measuring sensation seeking as a personality trait in older adults.