Reinforcer pathology II: Reward magnitude,reward delay,and demand for alcohol collectively relate to college students' alcohol related problems

The reinforcer pathologies model of addiction posits that two characteristic patterns of operant behavior characterize addiction. Specifically, individuals suffering from addiction have elevated levels of behavioral economic demand for their substances of abuse and have an elevated tendency to devalue delayed rewards (reflected in high delay discounting rates). Prior research has demonstrated that these behavioral economic markers are significant predictors of many of college students' alcohol-related problems. Delay discounting, however, is a complex behavioral performance likely undergirded by multiple behavioral processes. Emerging analytical approaches have isolated the role of participants' sensitivity to changes in reinforcer magnitude and changes in reinforcer delay. The current study uses these analytic approaches to compare participants' discounting of money versus alcohol, and to build regression models that leverage these new insights to predict a wider range of college students' alcohol related problems. Using these techniques, we were able to 1) demonstrate that individuals differed in their sensitivity to magnitudes of alcohol versus money, but not sensitivity to delays to those commodities and 2) that we could use our behavioral economic measures to predict a range of students' alcohol related problems.     

A Mixed-Methodological Evaluation of a Subjective Well-Being Intervention Program With Elementary-Age Students

An embedded mixed-methods design was implemented with 34 elementary-age students (mean age = 10.15 years, SD = 0.65) to evaluate salient experiences and improvements in protective factors and life satisfaction associated with a subjective well-being intervention program (SWIP). Analyses resulted in a model of participant experiences in which thematic experiences with SWIP participation (improved emotional expression, enhanced self-discovery, and increased empathy) promoted the emergence of protective factors (self-concept and self-confidence) that contributed to life satisfaction.     

社区卫生服务——体现效率与公正特征的改革之路

社区卫生服务比较全面地体现了公正与效率的原则，是卫生改革的一项重大举措。它公正有效地突破了固有的卫生体制；公正有效地实现了“人人享有初级卫生保健”的目的；公正有效地推进了医学模式的转移；公正有效地抓住了纠风的症结；公正有效地解决了医疗费居高不下的顽症。     

“God is My First Aid Kit”: The Negotiation of Health and Illness among Christian Scientists

Christian Scientists’ rejection of conventional medical practices has generated considerable controversy. Using insights from theories of subcultural identity and cultural repertoires, we analyze elite discourse and adherent narratives from 20 Christian Scientists to examine how this nonmedicalized religion engages the challenges posed by the highly medicalized character of American society. The writings of Christian Science founder Mary Baker Eddy primarily exhibit a critical posture toward conventional medicine, although conciliatory language is also evident in these same works. These discursive nuances provide Christian Science adherents with latitude in negotiating health and illness in their everyday lives. Interview data reveal that negotiated health practices are particularly evident in three domains: using prayer as a means of seeking divine guidance, developing metaphysical competency as a healer, and weighing options based on legal mandates for seeking medical treatment. We conclude by specifying the implications of our findings and identifying directions for future research.     

Religious Service Attendance Aids Coping by Providing a Sense of Continuity: A Test of the Stress‐Support Matching Hypothesis Using Mental Health Outcome Measures

We propose that religious service attendance (RSA) serves as a coping resource by providing a sense of continuity. As a source of continuity, and per the stress‐support matching hypothesis, RSA should consistently buffer the negative mental well‐being impacts of stressors related to discontinuity—the disruption of regular routines and relationships. Most, but not all, of the relevant previous studies we reviewed found that RSA served as an effective buffer for the negative mental health impacts of discontinuity stressors (such as unemployment, terminated relationships, etc.). This variability in previous findings warranted a formal exploration of the relationship between RSA and specific stressors. To that end, we conducted a series of OLS regression path analyses on a sample of Americans age 40 and older (N = 2,579). RSA was found to consistently buffer the negative impact of discontinuity stressors on mental well‐being but failed to do so for other stressors. Overall, our observations are (a) consistent with the stress‐support matching hypothesis, (b) suggest that RSA is particularly effective for reducing the negative impacts of discontinuity stressors, and (c) found no instance in which RSA exacerbated (i.e., made more severe) the effects of life event stressors on mental well‐being.     

Gun attitudes on campus: United and divided by safety needs

All people share a need for safety. Yet people’s pursuit of safety can conflict when it comes to guns, with some people perceiving guns as a means to safety and others perceiving guns as a threat to safety. We examined this conflict on a U.S. college campus that prohibits guns. We distinguished between people (N = 11,390) who (1) own a gun for protection, (2) own a gun exclusively for reasons other than protection (e.g., collecting, sports), and (3) do not own a gun. Protection owners felt less safe on campus and supported allowing guns on campus. They also reported that they and others would feel safer and that gun violence would decrease if they carried a gun on campus. Non-owners and non-protection owners felt the reverse. The findings suggest that protection concerns, rather than gun-ownership per se, account for diverging perceptions and attitudes about guns and gun control.     

Response–reinforcer dependency and resistance to change

The effects of the response–reinforcer dependency on resistance to change were studied in three experiments with rats. In Experiment 1, lever pressing produced reinforcers at similar rates after variable interreinforcer intervals in each component of a two‐component multiple schedule. Across conditions, in the fixed component, all reinforcers were response‐dependent; in the alternative component, the percentage of response‐dependent reinforcers was 100, 50 (i.e., 50% response‐dependent and 50% response‐independent) or 10% (i.e., 10% response‐dependent and 90% response‐independent). Resistance to extinction was greater in the alternative than in the fixed component when the dependency in the former was 10%, but was similar between components when this dependency was 100 or 50%. In Experiment 2, a three‐component multiple schedule was used. The dependency was 100% in one component and 10% in the other two. The 10% components differed on how reinforcers were programmed. In one component, as in Experiment 1, a reinforcer had to be collected before the scheduling of other response‐dependent or independent reinforcers. In the other component, response‐dependent and ‐independent reinforcers were programmed by superimposing a variable‐time schedule on an independent variable‐interval schedule. Regardless of the procedure used to program the dependency, resistance to extinction was greater in the 10% components than in the 100% component. These results were replicated in Experiment 3 in which, instead of extinction, VT schedules replaced the baseline schedules in each multiple‐schedule component during the test. We argue that the relative change in dependency from Baseline to Test, which is greater when baseline dependencies are high rather than low, could account for the differential resistance to change in the present experiments. The inconsistencies in results across the present and previous experiments suggest that the effects of dependency on resistance to change are not well understood. Additional systematic analyses are important to further understand the effects of the response–reinforcer relation on resistance to change and to the development of a more comprehensive theory of behavioral persistence.     

On the predictive validity of behavioral momentum theory for mitigating resurgence of problem behavior

We summarize the results of four recent translational studies from our lab that used the predictions of behavioral momentum theory to inform the development of more durable treatments for destructive behavior. Treatments informed by behavioral momentum theory generally showed better suppression of target responding during an extinction challenge than did a comparison treatment. We reanalyze data from each of the four studies to show that this general finding is apparent both at the aggregate (i.e., proportion of baseline response rates averaged across participants) and within participant (i.e., percentage reduction in proportion of baseline response rates, difference in raw response rates during the extinction challenge). Interestingly, participants who experienced multiple cycles of the extinction challenge generally showed less differentiation in target responding between the treatment informed by behavioral momentum theory and the comparison treatment. Overall results suggest that applications of behavioral momentum theory can substantially improve the durability of common treatments for destructive behavior.     

Preference,resistance to change,and the cumulative decision model

According to behavioral momentum theory (Nevin & Grace, 2000a), preference in concurrent chains and resistance to change in multiple schedules are independent measures of a common construct representing reinforcement history. Here I review the original studies on preference and resistance to change in which reinforcement variables were manipulated parametrically, conducted by Nevin, Grace and colleagues between 1997 and 2002, as well as more recent research. The cumulative decision model proposed by Grace and colleagues for concurrent chains is shown to provide a good account of both preference and resistance to change, and is able to predict the increased sensitivity to reinforcer rate and magnitude observed with constant‐duration components. Residuals from fits of the cumulative decision model to preference and resistance to change data were positively correlated, supporting the prediction of behavioral momentum theory. Although some questions remain, the learning process assumed by the cumulative decision model, in which outcomes are compared against a criterion that represents the average outcome value in the current context, may provide a plausible model for the acquisition of differential resistance to change.     

Greater reinforcement rate during training increases spontaneous recovery

Spontaneous recovery occurs when a previously reinforced and recently extinguished response reemerges over the course of time, often at the beginning of a new session of extinction. Spontaneous recovery could underlie instances of treatment relapse that threaten otherwise effective behavioral interventions for problem behavior. In two experiments, we arranged multiple schedules with pigeons and a human child to assess the effects of different training reinforcer rates on spontaneous recovery. In both experiments, responding was both more resistant to extinction and more likely to relapse following training with greater reinforcement rates upon returning to extinction after time off from extinction testing. A quantitative model based on behavioral momentum theory accounted well for the data, which suggests reexposure to the extinction context following time off during extinction resulted in (1) the failure of extinction learning to generalize, and (2) greater generalization of original learning during training. The present model attempts to quantify theories attributing spontaneous recovery to changes in temporal context.