The Effects of Using a Conditioned Stimulus to Cue DRO Schedules

A reversal design was used to examine the effects of a differential reinforcement of other behavior (DRO) procedure and the presence of a stimulus (i.e., a bracelet), conditioned via discrimination training, on reducing socially maintained non‐contextual vocalizations in an adolescent girl with autism. Initially, a functional analysis determined that non‐contextual vocalizations were maintained by social attention. Then, discrimination training was used to establish the presence of the bracelet as a discriminative stimulus for the absence of vocalizations. Specifically, when the bracelet was on, non‐contextual vocalizations were interrupted, and edible reinforcement was provided for the absence of vocalizations. When the bracelet was off, vocalizations were not interrupted and the teacher provided social attention to the participant (i.e., reciprocated conversation with the participant about the topic). During intervention, a DRO procedure was used. The participant was presented with the bracelet, a timer set for a specified interval, and the instruction to work quietly. If vocalizations did not occur for the entire duration of the interval, the bracelet was removed and the learner was given the opportunity to engage in vocalizations. The DRO interval was systematically increased throughout the intervention. Results are discussed in terms of discrimination training as an effective addition to differential reinforcement procedure. Copyright © 2015 John Wiley & Sons, Ltd.     

On the Prioritized Processing of Threat in a Dual Implicit Process Model of Evaluation

Dual-process models of attitudes distinguish between implicit and explicit processes in which the valence (i.e., positivity or negativity) of a stimulus influences judgments and behavior toward the stimulus. Developing parallel to the dual-process literature has been a threat detection literature suggesting that the mind is preferentially attuned to threats to immediate bodily harm. That literature reveals early privileged responses (e.g., shorter latency of detection, stronger reflexive reactions, and faster and stronger physiological responses) to threatening stimuli relative to negative, neutral, and positive stimuli. By integrating those literatures, we develop the dual implicit process model that postulates two functionally distinct and serially linked automatic processes in which an implicit threat process precedes (and potentially influences) an implicit valence process (positive vs. negative), which precedes (and potentially influences) explicit processes. In addition to explicating the nature of the model, we examine insights it offers various research areas, and conclude by identifying open questions regarding the model.     

Aversive Racism and Resistance to Affirmative Action: Perception of Justice Are Not Necessarily Color Blind

This study utilized a factorial survey design to assess attitudes toward affirmative action as a function of targeted group (Black, handicapped, or elderly persons), framing of the policy (with or without social justification), and institutional context (business, college, or social organization). Resistance to affirmative action was aroused more by policies specifying Blacks as the targeted group and by policies presented without justification. Supportive of the aversive racism framework, the level of resistance to the policies presented without justification for Blacks as the target group was higher than for all other targeted groups with or without justification. Implications for these findings for strategies to reduce negative attitudes toward affirmative action are discussed.     

Longitudinal Investigation of the Link Between Proactive and Reactive Aggression and Disciplinary Actions in an After-School Care Program

The current study longitudinally investigated relations between proactive (goal-oriented, calculated) and reactive (response to perceived threat) aggression and disciplinary actions in an after-school care program in a sample of 147 school-age children (Mean age = 8.22 years; 54.4% male). In addition, perceived best friend delinquency was examined as a moderator of the relations between proactive and reactive aggression and disciplinary actions. As expected, high levels of proactive aggression were associated with high levels of disciplinary actions. Reactive aggression, in contrast, was negatively associated with disciplinary actions 2-months later. Finally, perceived best friend delinquency moderated the association between proactive, but not reactive, aggression and disciplinary actions. However, this interaction effect was only marginally statistically significant (p = .06). Implications for findings and future directions are discussed.     

Teaching Ethics to Engineers: Ethical Decision Making Parallels the Engineering Design Process

In order to fulfill ABET requirements, Northern Arizona University’s Civil and Environmental engineering programs incorporate professional ethics in several of its engineering courses. This paper discusses an ethics module in a 3rd year engineering design course that focuses on the design process and technical writing. Engineering students early in their student careers generally possess good black/white critical thinking skills on technical issues. Engineering design is the first time students are exposed to “grey” or multiple possible solution technical problems. To identify and solve these problems, the engineering design process is used. Ethical problems are also “grey” problems and present similar challenges to students. Students need a practical tool for solving these ethical problems. The step-wise engineering design process was used as a model to demonstrate a similar process for ethical situations. The ethical decision making process of Martin and Schinzinger was adapted for parallelism to the design process and presented to students as a step-wise technique for identification of the pertinent ethical issues, relevant moral theories, possible outcomes and a final decision. Students had greatest difficulty identifying the broader, global issues presented in an ethical situation, but by the end of the module, were better able to not only identify the broader issues, but also to more comprehensively assess specific issues, generate solutions and a desired response to the issue.     

Differential reinforcement of alternative behavior increases resistance to extinction: clinical demonstration, animal modeling, and clinical test of one solution

Basic research with pigeons on behavioral momentum suggests that differential reinforcement of alternative behavior (DRA) can increase the resistance of target behavior to change. This finding suggests that clinical applications of DRA may inadvertently increase the persistence of target behavior even as it decreases its frequency. We conducted three coordinated experiments to test whether DRA has persistence-strengthening effects on clinically significant target behavior and then tested the effectiveness of a possible solution to this problem in both a nonhuman and clinical study. Experiment 1 compared resistance to extinction following baseline rates of reinforcement versus higher DRA rates of reinforcement in a clinical study. Resistance to extinction was substantially greater following DRA. Experiment 2 tested a rat model of a possible solution to this problem. Training an alternative response in a context without reinforcement of the target response circumvented the persistence-strengthening effects of DRA. Experiment 3 translated the rat model into a novel clinical application of DRA. Training an alternative response with DRA in a separate context resulted in lower resistance to extinction than employing DRA in the context correlated with reinforcement of target behavior. The value of coordinated bidirectional translational research is discussed.     

The analysis and treatment of vocal stereotypy in a child with autism

This study examined procedures for the assessment and treatment of automatically reinforced vocal stereotypy of a 6‐year‐old girl with autism. Stimulus assessments were conducted to identify toys that were correlated with higher rates of vocal stereotypy and toys that were not. A concurrent operants assessment identified preferred stimuli (toys that produced auditory stimulation), which were then used as reinforcers for the non‐occurrence of vocal stereotypy. A reversal design was used to compare the effects of a fixed time schedule of reinforcement (FT 1‐min) to differential reinforcement for the non‐occurrence of behavior (DRO) to reduce vocal stereotypy. Implementation of the FT schedule revealed no effect, whereas the DRO schedule led to a reduction in the target behavior during treatment sessions and across the school day. This study adds to the body of literature supporting the identification of matched stimuli to reduce non‐socially mediated problem behavior. Copyright © 2005 John Wiley & Sons, Ltd.     

Post-Exercise Affect: The Effect of Mode Preference

It has been suggested that the performance of preferred modes of exercise will serve to maximize the affective response to exercise. Support has come from work that has shown the effect of exercise on affect to be mediated by enjoyment. However, there is a need to compare modes of exercise that differ in preference and enjoyment, yet are similar in intensity, duration and muscle group. This experiment was designed to achieve this aim. Thirty-four college-aged women completed 20 minutes of exercise on high and low preference modes of continuous exercise. Intensity was maintained at 65–75% of HRR. Affect was measured by the PANAS, collected prior to and at 5, 20, and 40 min post exercise. Results provided partial support for the hypothesis as mode preference moderated the improvement in positive affect, with no effect on the reduction in negative affect. Interestingly, regardless of mode preference, enjoyment ratings were found to mediate the change in both positive and negative affect.