Biomedical subjects
Publications and source records attributed to J J Plaud.
A cultural analysis is given to the premise that clinical psychology is a discipline of theoretical fragmentation. It is argued that the discipline will achieve paradigmatic status as an applied science by reestablishing the link between behavioral theory and clinical applications.
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The debate between mentalism/cognitivism and behaviorism is analyzed, and it is concluded that behaviorism is the philosophy more closely associated with psychology as a behavioral science, the cognitive approach being more closely aligned with biological science. Specific objections to mentalistic interpretations of behavioral phenomena are detailed, and examples from clinical psychology are used to show the importance of behavioral approaches in applied domains. It is argued that the relation between behavior theory and clinical psychology is critical to the continued advancement of applied psychology. Behavior analysis is offered as a direct, applied extension of behavior theory as well as a highly practical and effective approach for understanding, explaining, and modifying the factors that contribute to and maintain maladaptive behaviors.
Behavioral momentum, the persistence of behavior under altered environmental contingencies, is derived from Newtonian physics and operant psychology. It has relevance to behavior analysis in terms of shaping strong behaviors and ensuring effective relapse prevention strategies in behavior modification and therapy. The authors investigated whether changing the operant schedule contingencies affects the responses of older humans to different stimuli when reinforcement density is systematically manipulated. Fifteen older adults participated in a computer study in which each of 2 keys in a baseline condition was associated with the same schedule of reinforcement and multiple variable intervals; the only difference was that 1 reinforcer was 10 times larger than the other. After 6 sessions, the authors changed the contingency schedule to either an extinction condition, a variable-time schedule, or a different variable-interval schedule, to assess how participants' responses persisted when reinforcement contingencies were systematically changed. The results were consistent with the predictions of behavioral momentum. The participants not only biased their responses in favor of the more densely reinforcing key, but when contingencies changed, they showed significantly biased responses. Results supported the conclusion that healthy older adults allocate their behaviors in a manner very sensitive to training stimuli conditions; consistent with the basic principles of behavioral momentum, they show a degree of resistance to change in their behaviors when the behavioral contingencies are altered.
The respondent (classical) conditioning of male sexual arousal was investigated, employing penile plethysmography and 2 control procedures. Nine participants participated in three sessions, for three consecutive weeks. Each session consisted of fifteen stimulus periods and fifteen detumescence periods. Three participants participated in each of three different experimental conditioning procedures. Sexually explicit visual stimuli preselected by each participant were utilized as the unconditioned stimuli (US), and a neutral slide of a penny jar was employed as the conditioned stimulus (CS). In the first procedure, short delay conditioning, the CS was presented for 15 seconds, followed immediately by the US for 30 seconds. The second procedure was a backward conditioning procedure. In the third procedure, a random control condition, the presentation of CS and US was determined randomly. Results indicated that participants showed systematic maximum increases in penile tumescence from baseline in the short delay conditioning procedure, but not in the other two control procedures. Implications of these results to behavior therapy strategies which are based upon the conditioning of human sexual arousal are examined and discussed.
Stimulus equivalence is a behavioral approach to analyzing the "meaning" of stimulus sets and has an implication for clinical psychology. The formation of three-member (A --> B --> C) stimulus equivalence classes was used to investigate the effects of three different sets of sample and comparison stimuli on emergent behavior. The three stimulus sets were composed of Rational-Emotive Behavior Therapy (REBT)-related words, non-REBT emotionally charged words, and a third category of neutral words composed of flower labels. Sixty-two women and men participated in a modified matching-to-sample experiment. Using a mixed cross-over design, and controlling for serial order effects, participants received conditional training and emergent relationship training in the three stimulus set conditions. Results revealed a significant interaction between the formation of stimulus equivalence classes and stimulus meaning, indicating consistently biased responding in favor of reaching criterion responding more slowly for REBT-related and non-REBT emotionally charged words. Results were examined in the context of an analysis of the importance of stimulus meaning on behavior and the relation of stimulus meaning to behavioral and cognitive theories, with special appraisal given to the influence of fear-related discriminative stimuli on behavior.
Advances in areas of behavior analysis are discussed to show the relevance of experimental science to behavior therapy. It is concluded that there are many areas of mutual interest between experimental operant psychologists and behavior therapists that may serve to enhance the clinical efficacy and range of behavior problems addressed by behavior therapists. Specific examination is given to areas of experimental behavior analysis such as reinforcement, including schedules of reinforcement; the matching law; advanced issues in stimulus control; the interaction between operant and classical conditioning; behavioral momentum; rule-governed behavior; and stimulus equivalence. The argument that behavior therapists are not knowledgeable about behavior analysis is disputed, and it is concluded that behavior therapists are in a unique position to be the practice professionals best able to utilize the principles of learning and behavior analysis in the service of adaptive behavior change.
The present article begins with an introduction to the role of Institutional Review Boards (IRBs) in research activities in general and proceeds to issues IRBs face with relation to special populations, including children and terminally ill individuals, as well as developmentally disabled and cognitively impaired persons. A historical overview of research with these special populations is included, and the report concludes with a real-world example of how IRB-related issues with developmentally disabled and cognitively impaired individuals are discussed and resolved.
Studies have supported the finding that sexually coercive behavior exists between males and females on college campuses and that when women say "no" to sexual behavior, men do not believe them. This study utilized penile plethysmography to investigate male sexual arousal to rape myth scenarios in a college population. The scenarios portrayed a woman who said "no" to sexually coercive intercourse behavior by a male. Results indicated that a low level of social desirability, sexual fantasies involving group sexual activity, as well as hurting and being hurt by a partner were associated with greater levels of physiological responding to coercive stimuli. Supportive attitudes about rape showed no relationship with physiological responding, yet did correlate with the sexual fantasy of being hurt by a partner, which was itself related to increased sexual arousal to sexually coercive audio stimuli.
Behavioral momentum, which can be defined as the persistence of behavior under altered environmental contingencies, is derived from Newtonian physics and operant psychology, and has relevance to behavior therapy in terms of shaping strong behaviors and ensuring effective relapse prevention strategies. The present study investigated whether changing operant schedule contingencies affects how humans respond to different stimuli when reinforcement density is systematically manipulated. Fifteen subjects participated in a computer study, in which each of two keys in a baseline condition was associated with the same schedule of reinforcement, multiple variable interval schedules, the only difference being that one reinforcer was ten times larger than the other. After six sessions, the contingency schedule changed to either an extinction condition, a variable time schedule, or a changed variable interval schedule to assess how 'subjects' responses persisted when reinforcement contingencies were systematically changed. Results of this study were found to be consistent with the general predictions of behavioral momentum. Subjects not only biased responding in favor of the more densely reinforcing key, but when contingencies changed, subjects showed continued biased responding. Implications for behavioral momentum for behavior modification and behavior therapy are discussed, and it is concluded that behavioral momentum has significant implications for designing new and comprehensive behavior change programs.
Behavior principles are naturally implicated in most of the behavior therapy techniques used in the treatment of sexual dysfunctions and sexual disorders. Hypotheses differ, however, in the extent to which behavior therapy procedures emphasize the classical conditioning of sexual arousal (e.g. penile responses) or the operant conditioning of deviant sexual behavior patterns, or other often ignored behavior principles such as habituation. The purpose of the present case study is to investigate the possibility that at least part of the clinical effects of a widely used behavior therapy technique for sexual deviations, covert sensitization, may directly involve habituation processes. Results of the assisted covert sensitization case study indicate that, while expected decrements in sexual arousal to sexually inappropriate stimuli were observed, decrements in sexual arousal and self-report were also observed for sexually appropriate stimuli which received no aversive consequences, only repeated stimulus presentation over time. It is argued that habituation processes need further empirical investigation as a potential behavioral mechanism in the beneficial clinical effects usually noted in covert sensitization procedures.
The foundation, accomplishments, and proliferation of behavior therapy have been fueled largely by the movement's grounding in behavioral principles and theories. Ivan P. Pavlov's discovery of conditioning principles was essential to the founding of behavior therapy in the 1950s and continues to be central to modern behavior therapy. Pavlov's major legacy to behavior therapy was his discovery of "experimental neuroses", shown by his students M.N. Eroféeva and N.R. Shenger-Krestovnikova to be produced and eliminated through the principles of conditioning and counterconditioning. In this article, the Pavlovian origins of behavior therapy are assessed, and the relevance of conditioning principles to modern behavior therapy are analyzed. It is shown that Pavlovian conditioning represents far more than a systematic basic learning paradigm. It is also an essential theoretical foundation for the theory and practice of behavior therapy.
Understanding sexual fantasies is important to the scientific study of human sexuality. A sexual fantasy refers to a private or covert experience in which the imagination of desirable sexual activity with a partner is sexually arousing to the individual. Prior sexual experiences of an individual appear to increase the incidence of sexual fantasies, as well as the variety of sexual themes in a fantasy, which permit a greater elaboration of the fantasy theme when compared to less sexually experienced individuals. The present study was an investigation of the factors or sexual themes that emerge in a college male population, as well as a comparison of college men with human samples obtained in other studies: a sample of men and women and a sample of sexually variant men. In this study, 116 male students, all of whom identified themselves as heterosexual, completed the Wilson Sex Fantasy Questionnaire (WSFQ). Results indicated that the present sample had significantly more exploratory, intimate, impersonal, and total sexual fantasies than sexual fantasies reported by female respondents in another study using the WSFQ and significantly more intimate, impersonal, and total sexual fantasizing when compared with a male sample in another study. The men in this study also evidenced less deviant areas of sexual fantasizing when compared with a group of sexually variant men in another study. A principal components analysis extracted four factors, which accounted for 45% of the total variance. The four sexual fantasy topic areas for the most part replicated prior findings by Wilson (1988) but are also more heterogeneous, indicating that male college students engage in a variety of sexual fantasies but seem to favor more intimate, less deviant or exploratory sexual themes that are in line with nonclinical samples and different from several clinical samples of sexually variant men.
The psychometric characteristics of the Weekly Stress Inventory (WSI) were examined in a sample of medical patients (N = 84) diagnosed with coronary heart disease. In addition to the WSI, patients completed measures assessing recent depressive symptoms, physical symptoms, Type A behavior, and trait anxiety. Patients also monitored stress for 3 weeks (n = 46), completing the Daily Stress Inventory (a measure of minor stress) daily and the WSI at concurrent 1-week intervals. Results indicated that the WSI is an internally consistent and moderately stable measure. Validity of the WSI was supported by (a) strong correlations with a concurrently administered measure of minor stress (concurrent validity); (b) significant positive correlations with measures assessing recent depressive symptoms, physical symptoms, and Type A behavior; and (c) a lack of relationship with a measure of trait anxiety (discriminant validity).
Recent behavioral studies have addressed the persistence of behavior under altered environmental conditions using more sophisticated techniques of behavior analysis which have direct relevance for applied behavior analysis and therapy. In clinical populations, for example, behavioral programs are concerned with issues such as generalizability of behavior and relapse prevention (Epstein, 1992). Free-operant behavior can be analyzed not only in terms of its response rate but also in terms of its persistence under changed environmental constraints. The aggregation of these two response measures, rate and persistence, has been termed behavioral momentum (Nevin, Mandell, & Atak, 1983). This study assessed behavioral momentum in a human population in order to test predictions made from the behavioral model and potential clinical applications of behavioral momentum to behavior analysis and therapy. Eight undergraduates served as subjects for this study. Results were consistent with the predictions based on behavioral momentum. Denser reinforcement schedules, regardless of response contingency, produced greater resistance to the implementation of changed contingency schedules. Results of this study may have direct application to behavior analysis programs. If humans, in clinical contexts, show similar patterns of persistence in behavior under changed environmental settings, schedules could be implemented that provide both contingent and non-contingent reinforcement, thereby strengthening behavior to give it greater generalizability outside of the immediate situation.
This study examined interrelationships of psychosocial variables found in a psychological evaluation for erectile disorder in 75 male veterans with chronic medical illness. Patients whose partners participated in the evaluation were compared with those whose partners were not involved, and agreement on measures between patients and partners was examined. Finally, a principal components analysis was performed to assess the primary dimensions underlying the variance in mental health and sexual functioning variables. Five factors were identified, accounting for 65.5% of the variance. Results of these analyses are discussed in order to obtain an understanding of the interrelationship between behavioral, psychological, and interpersonal variables in the onset and course of sexual dysfunction.
Research into why people choose not to use condoms despite a growing AIDS epidemic has tapped the attitude that the use of condoms somehow interferes with the progression of the sexual act or lessens sexual pleasure. The current study investigated the effects on male sexual arousal of condom use described in sexually explicit audiotaped narratives. The sexual arousal of 14 male university students was measured physiologically by penile plethysmography and by self-report using a within-subjects design. Subjects listened to 10 audiotaped scripts, half of which included the use of a condom and half of which did not. No significant differences in either physiological or subjective arousal data were found between conditions.
Historical and contemporary theories of reinforcement, as well as the clinical application of reinforcement principles to behavior modification and therapy, are critically analyzed and discussed. A new behavioral approach to studying the allocation of behavior under changed environmental constraints, termed behavioral momentum, is also presented. Whereas traditional behavioral analysis has emphasized the role of response rate as an index of response probability and response strength, more recent studies have addressed the persistence of behavior under altered environmental conditions and reinforcement contingencies. In terms of behavior modification and therapy, issues such as generalizability and relapse prevention have major implications for the type and length of behavioral intervention strategies employed. The behavioral momentum model analyzes operant behavior not only in terms of its response rate but also in relation to its persistence under changed environmental constraints. The authors discuss the applicability of this recent addition to reinforcement theories in context of its implications for behavior modification and therapy.