Dynamic effects of food magnitude on interim-terminal interaction

We tested the assumption of a facilitatory relation between periodic food presentation and schedule-induced drinking by examination of (a) elicited drinking, (b) drinking in anticipation of food delivery, and (c) possible indirect effects of food delivery on drinking. We exposed rats to a fixed-time 60-second schedule in which interfood intervals ended in either one or four food pellets with equal probability. In Phases 1 and 3, a stimulus signaled the magnitude of upcoming food presentation. In Phase 2, the stimulus was eliminated. Changes in drinking and “head-in-feeder” distributions within interfood intervals demonstrated that head-in-feeder was controlled directly by food presentation, but drinking was not. Head-in-feeder increased and drinking was reduced when large meals began or ended an interval. In Phases 4 to 6, meal size was manipulated across sessions yielding a positive relation between meal size and schedule-induced drinking. We conclude: (1) Schedule-induced drinking is determined by distributions of food-related behavior and results from indirect effects of food delivery; and (2) the amount of schedule-induced drinking and the form of the drinking distributions in this experiment can be accurately explained by two assumptions: (a) Food presentation facilitates food-related behavior through elicitation and anticipation; and (b) food-related behavior and drinking are reciprocally, linearly related.     

SCHEDULE-INDUCED DRINKING: ELICITATION,ANTICIPATION, OR BEHAVIORAL INTERACTION?

We carried out five experiments with rats on fixed-time schedules in order to define the relation between drinking and individual food-pellet presentations. In Experiment 1, unsignaled extra food occurred at the end of occasional fixed intervals, and we compared subsequent drinking patterns with drinking before the extra food presentation. In Experiment 2 we presented signaled and unsignaled extra food and measured elicited and anticipatory drinking patterns. In Experiment 3, we observed the persistence of modified drinking patterns when several consecutive intervals ended with extra pellets. In Experiments 4 and 5, we varied the magnitude of food delivery across (rather than within) sessions to replicate published findings. Results show that schedule-induced drinking is neither elicited by food presentations nor induced by stimuli associated with a high food rate. All subjects seemed to follow a simple rule: during any stimulus signaling an increase in the local probability of food delivery within a session, engage in food-related behavior to the exclusion of drinking. Schedule-induced drinking appears to be the result of dynamic interactions among food-related behavior, drinking, and other motivated behavior, rather than a direct effect of the contingencies of food reinforcement.     

The impact of sex,achievement domain,and conceptual orientation on causal attributions

Sex differences in achievement domain and achievement orientation were examined to better understand women's achievement. College students (84 women, 59 men) were asked to write brief accounts of a past success and a past failure and to provide causal attributions for each. More women recalled affiliative-process events, and proportionally more men recalled mastery-impact events. The relationship of topic domain and conceptual orientation to causal attributions was apparent only for accounts of failure. Topic domain and conceptual orientation interacted with sex to further influence stability attributions. When women conceptualized failure as a process, they emphasized attributions to effort and luck, while men accounted for the process failure by ability and task. When the failure was conceptualized in terms of final impact, the sex pattern of attributions was reversed.     

A systematic evaluation of preferences identified through person-centered planning for people with profound multiple disabilities

Person-centered planning is becoming a popular means of designing supports for people with disabilities. However, very little research evaluating person-centered planning exists. We evaluated the degree to which items and activities reported to be preferred in person-centered plans represented accurate preferences based on how individuals responded when presented with the items and activities. Person-centered planning meetings were conducted with 4 individuals with profound multiple disabilities to develop preference maps and to identify leisure-related preferences. A sample of the reported preferences in the plans was then systematically assessed by observing each participant's approach and avoidance responses to the items and activities. Of the sampled items and activities reported to be preferred in the plans, 42% represented moderate preferences based on the latter assessment process and 33% represented strong preferences. With 2 participants, several preferences identified in the plans were nonpreferred items and activities based on the preference assessments, and some were frequently avoided. These results suggested that although person-centered plans may identify some accurate preferences for people with profound multiple disabilities, this approach should be used cautiously. Results also suggested that such plans should be supplemented with systematic preference assessments to ensure the accuracy of identified preferences. Future research areas focus on evaluating other aspects of person-centered planning.     

Description and Immediate Impacts of a Preventive Intervention for Conduct Problems

A population-based randomized intervention trial for the prevention of conduct problems (i.e., oppositional defiant disorder and conduct disorder) is described. The LIFT (Linking the Interests of Families and Teachers) intervention was designed for all first- and fifth-grade elementary school boys and girls and their families living in at-risk neighborhoods characterized by high rates of juvenile delinquency. The 10-week intervention strategy was carefully targeted at proximal and malleable antecedents in three social domains that were identified by a developmental model of conduct problems. From 12 elementary schools, 671 first and fifth graders and their families participated either in the theory-based universal preventive intervention or in a control condition. The intervention consisted of parent training, a classroom-based social skills program, a playground behavioral program, and systematic communication between teachers and parents. A multiple measure assessment strategy was used to evaluate participant satisfaction and participation, fidelity of implementation, and the immediate impacts of the program on targeted antecedents.     

Training direct service staff in congregate settings to interact with people with severe disabilities: A quick,effective and acceptable program

An area of traditional as well as recent concern in congregate settings for people with severe disabilities is ensuring frequent social interactions between direct service staff and individuals who live in the residences. This study evaluated a program for training staff to interact frequently and positively across clients while in group situations in living units. The program involved a short classroom instructional session encompassing less than 1 h, followed by a maximum of 4 brief on-the-job observations and feedback sessions. Results indicated interaction rates of all 9 participating direct service staff increased above a normative criterion rate while participating in the training program. All staff also increased the proportion of their social interactions with clients that were positive in nature, and 6 of the 9 staff increased their distribution of interactions across clients. The improved interaction performances occurred when staff were provided with immediate on-the-job feedback regarding their performances as well as when provided with delayed feedback. Acceptability measures indicated the training program was well received by staff, although program components also were noted that may have affected staff acceptance differentially. Directions for future research are suggested in regard to further evaluating and increasing staff acceptance of effective training procedures.     

DIFFERENTIAL EFFECTS OF SELF-MONITORING ATTENTION,ACCURACY, AND PRODUCTIVITY

Effects of self-monitoring on-task behavior, academic productivity, and academic accuracy were assessed with 6 elementary-school students with learning disabilities in their general education classroom using a mathematics task. Following baseline, the three self-monitoring conditions were introduced using a multiple schedule design during independent practice sessions. Although all three interventions yielded improvements in either arithmetic productivity, accuracy, or on-task behavior, self-monitoring academic productivity or accuracy was generally superior. Differential results were obtained across age groups: fourth graders' mathematics performance improved most when self-monitoring productivity, whereas sixth graders' performance improved most when self-monitoring accuracy.     

REDUCTION OF SELF-INJURIOUS HAND MOUTHING USING RESPONSE BLOCKING

We evaluated a response-blocking procedure for reducing the self-injurious hand mouthing of 2 adults with profound disabilities. The procedure reduced mouthing in both cases. The results suggest research is warranted to delineate the behavioral process responsible for the effect of response blocking and to determine the procedure's long-term utility.     

Terrorism research and the diffusion of ideas

The diffusion of ideas about contemporary terrorism is analyzed using a sociology of science methodology. One of the most common means of creating understandings of a phenomenon is the development and diffusion of ideas that influence the positions adopted by a wide range of actors, including government bureaucrats and decision makers, legislative and corporate bodies, and the public. How did terrorism researchers interact with these actors to construct, maintain, and modify the development and perception of contemporary terrorism? How were the ideas diffused and what impact did they have on policymakers? Did the invisible college of terrorism researchers function as an epistemic community? These questions are analyzed using an integrated research strategy that employs a number of techniques and data sources such as bibliometrics, content analysis, and citation analysis of selected terrorism research publications, biographies, and conferences, and on-line tracing of researchers’ affiliations, participations, and collaborations.