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Smith SW, Arroyo Antúnez BE, DeBartelo J, Sullivan WE, Roane HS, Craig AR. Synthesized alternative reinforcement and resurgence. J Exp Anal Behav 2024. [PMID: 39086124 DOI: 10.1002/jeab.4202] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2024] [Accepted: 07/17/2024] [Indexed: 08/02/2024]
Abstract
In treatments based on differential reinforcement of alternative behavior, applied researchers and clinicians often provide multiple, qualitatively different reinforcers (i.e., synthesized reinforcement) rather than a single reinforcer (i.e., isolated reinforcement) contingent on alternative behavior. Some research shows that providing synthesized reinforcement for alternative responses within such treatments produces more rapid and complete suppression of target behavior; however, there is limited research evaluating the durability of these effects during treatment disruptions. Conceptual explanations of resurgence (e.g., resurgence as choice, context theory) suggest that treatments that include synthesized alternative reinforcement may lead to more resurgence of target behavior when alternative reinforcement is disrupted relative to treatments using isolated reinforcement. We evaluated this hypothesis within a three-phase resurgence evaluation. We exposed rats to isolated or synthesized reinforcement for alternative responding in the second phase, and we exposed rats to extinction in the third phase. Synthesized alternative reinforcement produced more rapid and complete suppression of target behavior than did isolated reinforcement in the second phase; however, exposure to extinction following synthesized reinforcement produced more resurgence. We discuss these results in terms of their implications for applied research and their support for current conceptual explanations for resurgence.
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Affiliation(s)
- Sean W Smith
- SUNY Upstate Medical University, Syracuse, NY, USA
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2
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Shahan TA, Sutton GM, Van Allsburg J, Avellaneda M, Greer BD. Resurgence Following Higher or Lower Quality Alternative Reinforcement. J Exp Anal Behav 2024; 121:246-258. [PMID: 38329150 DOI: 10.1002/jeab.904] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2023] [Accepted: 01/24/2024] [Indexed: 02/09/2024]
Abstract
Resurgence is a temporary increase in a previously suppressed target behavior following a worsening in reinforcement conditions. Previous studies have examined how higher rates or magnitudes of alternative reinforcement affect suppression of the target behavior and subsequent resurgence. However, there has been no investigation of the effects of higher versus lower qualities of alternative reinforcement on resurgence. Using a three-phase resurgence preparation with rats, the present experiments examined the effects of an alternative reinforcer that was of higher (Experiment 1) or lower (Experiment 2) quality than the reinforcer that had previously maintained the target behavior. The results of both experiments showed greater reductions in target behavior with a higher quality alternative reinforcer and larger increases in target responding when a higher quality alternative reinforcer was removed. Along with prior findings with higher rates and magnitudes of alternative reinforcement, these findings suggest that variations in reinforcer dimensions that increase the efficacy of alternative reinforcement also tend to increase resurgence when alternative reinforcement is removed. The results are discussed in terms of the resurgence as choice in context model and in terms of potential clinical implications.
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Affiliation(s)
| | | | | | | | - Brian D Greer
- Children's Specialized Hospital-Rutgers University Center for Autism Research, Education, and Services (CSH-RUCARES), Somerset, NJ, USA
- Rutgers Brain Health Institute, Piscataway, NJ, USA
- Rutgers Robert Wood Johnson Medical School, New Brunswick, NJ, USA
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Nist AN, Shahan TA. Examining resurgence in rats following expanded-operant treatments. J Exp Anal Behav 2023; 120:186-203. [PMID: 37337718 PMCID: PMC10721342 DOI: 10.1002/jeab.870] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2023] [Accepted: 05/28/2023] [Indexed: 06/21/2023]
Abstract
Resurgence of previously reinforced behavior represents a challenge to otherwise successful interventions based on differential reinforcement of alternative behavior (DRA). Expanded-operant treatments seek to increase the number of functional alternative behaviors through DRA, thereby potentially mitigating resurgence. However, the few studies that have directly examined these methods as a tool for resurgence mitigation have provided limited and unclear results. Thus, the present experiments were designed to investigate the effect of expanded-operant DRA methods on resurgence of previously reinforced behavior using rat subjects. In two experiments, following a baseline phase in which a target response was trained, groups of rats experienced concurrent (i.e., five simultaneous alternative responses), serial (i.e., five sequentially available alternative responses), or single DRA interventions arranging similar rates of alternative reinforcement in order to examine potential differences in resurgence. Both experiments showed that neither serial nor concurrent DRA expanded-operant treatments reduced resurgence compared with single DRA regardless of whether stimuli associated with previously reinforced alternative responses were removed (Experiment 1) or remained present (Experiment 2) for the serial-DRA group. Further, a primacy effect in resurgence was obtained for the serial-DRA group in both experiments. Overall, these results suggest that expanded-operant treatments may not help to reduce resurgence.
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Laureano B, Falligant JM. Modeling Behavioral Persistence with Resurgence as Choice in Context (RaC 2): A Tutorial. Behav Anal Pract 2023; 16:640-651. [PMID: 37187845 PMCID: PMC10170016 DOI: 10.1007/s40617-023-00796-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/30/2023] [Indexed: 05/17/2023] Open
Abstract
Resurgence as Choice in Context (RaC2) is a quantitative model for evaluating the reemergence of a previously extinguished response when alternative reinforcement is worsened. Rooted in the matching law, RaC2 proposes that allocation between target and alternative responding is based on changes in the relative value of each response option over time, accounting for periods with and without alternative reinforcement. Given that practitioners and applied researchers may have limited experience with constructing quantitative models, we provide a step-by-step task analysis for building RaC2 using Microsoft Excel 2013. We also provide a few basic learning activities to help readers better understand RaC2 itself, the variables that affect the model's predictions, and the clinical implications of those predictions. Supplementary Information The online version contains supplementary material available at 10.1007/s40617-023-00796-y.
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Affiliation(s)
- Brianna Laureano
- Neurobehavioral Unit, Kennedy Krieger Institute, 707 North Broadway, Baltimore, MD 21205 USA
- Johns Hopkins University School of Medicine, Baltimore, MD USA
| | - John Michael Falligant
- Neurobehavioral Unit, Kennedy Krieger Institute, 707 North Broadway, Baltimore, MD 21205 USA
- Johns Hopkins University School of Medicine, Baltimore, MD USA
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Ritchey CM, Kuroda T, Podlesnik CA. A quantitative analysis of resurgence following downshifts in alternative-reinforcer magnitude. J Exp Anal Behav 2023; 119:501-512. [PMID: 36919587 DOI: 10.1002/jeab.843] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2022] [Accepted: 02/18/2023] [Indexed: 03/16/2023]
Abstract
Resurgence is the increase in a previously reinforced and then extinguished target response due to changes in reinforcement conditions for an alternative response, including reductions in the rate or magnitude of reinforcement for the alternative response. Research with nonhumans suggests that reductions in both alternative-reinforcer rate and magnitude produce resurgence, but the present study was the first to examine effects of downshifts in alternative-reinforcer magnitude on humans' resurgence. Moreover, it was the first to evaluate whether the quantitative framework, resurgence as choice in context (RaC2 ), could account for those effects. Consistent with predictions of RaC2 , resurgence of a target button press occurred with reductions in point gain for an alternative response, with greater reductions producing higher levels of resurgence. However, the model consistently underpredicted and then overpredicted resurgence during tests with low-magnitude reinforcement and extinction. Systematic deviations in model predictions of alternative responding were also evident and consistent with previous fits of RaC2 to nonhuman data. Overall, our findings suggest that RaC2 could be a useful quantitative theoretical framework for understanding processes contributing to resurgence in humans, but further theoretical development is needed to account for the apparent divergent effects of extinction versus downshifts in reinforcer magnitude.
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Affiliation(s)
- Carolyn M Ritchey
- Auburn University Ringgold standard institution-Psychological Sciences, Auburn, Alabama, USA
| | - Toshikazu Kuroda
- Advanced Telecommunications Research Institute International Ringgold standard institution, Soraku-gun, Kyoto, Japan
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Podlesnik CA, Ritchey CM, Waits J, Gilroy SP. A Comprehensive Systematic Review of Procedures and Analyses Used in Basic and Preclinical Studies of Resurgence, 1970-2020. Perspect Behav Sci 2023; 46:137-184. [PMID: 37006602 PMCID: PMC10050505 DOI: 10.1007/s40614-022-00361-y] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/12/2022] [Indexed: 11/24/2022] Open
Abstract
Resurgence is the return of a previously reinforced response as conditions worsen for an alternative response, such as the introduction of extinction, reductions in reinforcement, or punishment. As a procedure, resurgence has been used to model behavioral treatments and understand behavioral processes contributing both to relapse of problem behavior and flexibility during problem-solving. Identifying existing procedural and analytic methods arranged in basic/preclinical research could be used by basic and preclinical researchers to develop novel approaches to study resurgence, whereas translational and clinical researchers could identify potential approaches to combating relapse during behavioral interventions. Despite the study of resurgence for over half a century, there have been no systematic reviews of the basic/preclinical research on resurgence. To characterize the procedural and analytic methods used in basic/preclinical research on resurgence, we performed a systematic review consistent with PRISMA (Preferred Reporting Items for Systematic Reviews and Meta-Analyses). We identified 120 articles consisting of 200 experiments that presented novel empirical research, examined operant behavior, and included standard elements of a resurgence procedure. We reported prevalence and trends in over 60 categories, including participant characteristics (e.g., species, sample size, disability), designs (e.g., single subject, group), procedural characteristics (e.g., responses, reinforcer types, control conditions), criteria defining resurgence (e.g., single test, multiple tests, relative to control), and analytic strategies (e.g., inferential statistics, quantitative analysis, visual inspection). We make some recommendations for future basic, preclinical, and clinical research based on our findings of this expanding literature. Supplementary Information The online version contains supplementary material available at 10.1007/s40614-022-00361-y.
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Affiliation(s)
- Christopher A. Podlesnik
- Department of Psychology, University of Florida, 114 Psychology Building, 945 Center Drive, Gainesville, FL 32611-2250 USA
| | | | - Jo Waits
- Louisiana State University, Baton Rouge, LA USA
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Podlesnik CA, Ritchey CM, Kuroda T, Cowie S. A Quantitative Analysis of the Effects of Alternative Reinforcement Rate and Magnitude on Resurgence. Behav Processes 2022; 198:104641. [DOI: 10.1016/j.beproc.2022.104641] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2021] [Revised: 03/29/2022] [Accepted: 04/05/2022] [Indexed: 11/02/2022]
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Nist AN, Shahan TA. Resurgence and repeated within-session progressive-interval thinning of alternative reinforcement. J Exp Anal Behav 2021; 115:442-459. [PMID: 33496004 DOI: 10.1002/jeab.672] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2020] [Revised: 11/20/2020] [Accepted: 12/09/2020] [Indexed: 12/30/2022]
Abstract
Resurgence of a previously suppressed target behavior is common when reinforcement for a more recently reinforced alternative behavior is thinned. To better characterize such resurgence, these experiments examined repeated within-session alternative reinforcement thinning using a progressive-interval (PI) schedule with rats. In Experiment 1, a transition from a high rate of alternative reinforcement to a within-session PI schedule generated robust resurgence, but subsequent complete removal of alternative reinforcement produced no additional resurgence. Experiment 2 replicated these findings and showed similar effects with a fixed-interval (FI) schedule arranging similarly reduced session-wide rates of alternative reinforcement. Thus, the lack of additional resurgence following repeated exposure to the PI schedule was likely due to the low overall obtained rate of alternative reinforcement provided by the PI schedule, rather than to exposure to within-session reinforcement thinning per se. In both experiments, target responding increased at some point in the session during schedule thinning and continued across the rest of the session. Rats exposed to a PI schedule showed resurgence later in the session and after more cumulative alternative reinforcers than those exposed to an FI schedule. The results suggest the potential importance of further exploring how timing and change-detection mechanisms might be involved in resurgence.
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Galizio A, Friedel JE, Odum AL. An investigation of resurgence of reinforced behavioral variability in humans. J Exp Anal Behav 2020; 114:381-393. [PMID: 33179789 PMCID: PMC7967018 DOI: 10.1002/jeab.637] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2020] [Revised: 10/18/2020] [Accepted: 10/19/2020] [Indexed: 11/09/2022]
Abstract
The present study examined resurgence of reinforced variability in college students, who completed a 3-phase computer-based variability task. In the first phase, baseline, points were delivered for drawing rectangles that sufficiently differed from previous rectangles in terms of a target dimension (size or location, counterbalanced) but were sufficiently similar in terms of the alternative dimension. In the second phase, alternative, points were only delivered for rectangles that were sufficiently different in terms of the alternative dimension, but repetitive in terms of the target dimension. In the third phase, extinction, no points were delivered. In baseline, participants made rectangles that were highly varied in terms of the target dimension and less varied in terms of the alternative dimension, and vice versa in the alternative phase. During extinction, levels of variability increased for the target dimension, providing evidence for resurgence of reinforced variability of a specific dimension of behavior. However, levels of variability also remained high for the alternative dimension, indicating that extinction-induced response variability may also have impacted the results. Although future research is needed to explore other explanations, the results of this study replicate prior research with pigeons and provide some support for the notion of variability as an operant.
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Cues Associated with Alternative Reinforcement During Extinction Can Attenuate Resurgence of an Extinguished Instrumental Response. Learn Behav 2020; 47:66-79. [PMID: 30054852 DOI: 10.3758/s13420-018-0339-9] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
In resurgence, a target behavior (R1) is acquired in an initial phase and extinguished in a second phase while an R2 behavior is reinforced. When R2 is extinguished, R1 behavior can return or resurge. Two experiments tested the effectiveness of a potential retrieval cue associated with extinction in attenuating resurgence. Experiment 1 established that a 2-s cue paired with outcome delivery in Phase 2 can attenuate resurgence when presented during testing. This effect depended on the cue being associated with the outcome, and it occurred if the cue was delivered contingently or noncontingently on responding during testing. Pairing the cue with reinforcement might be necessary to maintain attention to it during Phase 2. Experiment 2 demonstrated that the cue must be experienced in sessions that also include R1 extinction and that it does not reduce resurgence through a conditioned reinforcement mechanism. The results suggest that previously neutral stimuli can attenuate resurgence if they are first paired with alternative reinforcement and presented in sessions in which R1 is extinguished. They build on existing literature that suggests enhancing generalization between extinction and testing reduces resurgence. The results may have implications for reducing relapse following interventions in humans such as contingency management (CM), in which participants can earn vouchers contingent upon drug abstinence. A cue associated with CM might help reduce this relapse.
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Smith BM, Smith GS, Dymond S. Relapse of anxiety-related fear and avoidance: Conceptual analysis of treatment with acceptance and commitment therapy. J Exp Anal Behav 2019; 113:87-104. [PMID: 31875982 DOI: 10.1002/jeab.573] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2019] [Revised: 12/02/2019] [Accepted: 12/03/2019] [Indexed: 12/25/2022]
Abstract
Excessive fear and avoidance in relatively safe situations can lead to a narrowing of one's behavioral repertoire and less engagement with valued aspects of living. Ultimately, these processes can reach clinical levels, as seen in anxiety, trauma, and obsessive-compulsive disorders. Research on the basic behavioral processes underlying successful treatment with exposure therapy is growing, yet little is known about the mechanisms contributing to clinical relapse. Until recently, these mechanisms have largely been conceptualized in terms of Pavlovian return of fear, with relatively little research into operant processes. In the current paper, we briefly review translational research in anxiety disorders and the connections between fear and avoidance, focusing on recent work in the acquisition, extinction, and relapse of avoidance behavior and the generalization of this learning through arbitrary symbolic relations. We then introduce one possible treatment approach to mitigating clinical relapse, acceptance and commitment therapy (ACT), and provide a conceptual analysis for why ACT may be especially well-situated to address this issue. Finally, we end with potential directions for future research on treatment and relapse of anxiety disorders.
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Affiliation(s)
| | - Gregory S Smith
- Applied Behavior Analysis Department, The Chicago School of Professional Psychology
| | - Simon Dymond
- Department of Psychology, Swansea University.,Department of Psychology, Reykjavík University
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Reed P. Behavioral resurgence in individuals varying in depression, anxiety, and autism-associated tendencies. Heliyon 2019; 5:e02457. [PMID: 31667372 PMCID: PMC6812204 DOI: 10.1016/j.heliyon.2019.e02457] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2019] [Revised: 08/01/2019] [Accepted: 09/06/2019] [Indexed: 11/26/2022] Open
Abstract
Resurgence is the reappearance of a previously reinforced, but then extinguished behavior, when an alternative behavior that has been reinforced to replace it is also extinguished. This phenomenon has been suggested as important in the re-occurrence of many clinical problems, but little is known currently about the relationship between this process and different psychopathological traits. This experiment addressed this gap by comparing the levels of resurgent behavior in participants scoring lower or higher on depression-, anxiety-, and autism-related characteristics. Sixty participants completed an experimental task of three phases. In the first, they were presented with a concurrent RR-5 ext schedule, in the second with a conc ext RR-5 schedule (each lasting 6min), and finally with a conc ext ext schedule (lasting 2 min). Following this, all participants completed the Beck Depression Inventory, State-Trait Anxiety Inventory, and Autism Quotient, questionnaires provided. Participants showed a resurgence of responding at test from the response extinguished in Phase 2 that was greater for those with lower levels of depression, but high levels of anxiety. These findings are discussed in terms of their implications for understanding individual differences in terms of psychiatric symptomatology, for their treatment, and in terms of theoretical predictions derived for the various psychopathologies.
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Affiliation(s)
- Phil Reed
- Department of Psychology, Swansea University, Singleton Park, Swansea, SA2 8PP, UK
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Greer BD, Shahan TA. Resurgence as Choice: Implications for promoting durable behavior change. J Appl Behav Anal 2019; 52:816-846. [PMID: 31049954 PMCID: PMC6625346 DOI: 10.1002/jaba.573] [Citation(s) in RCA: 43] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2018] [Accepted: 03/20/2019] [Indexed: 11/07/2022]
Abstract
Resurgence is an increase in a previously suppressed behavior resulting from a worsening in reinforcement conditions for current behavior. Resurgence is often observed following successful treatment of problem behavior with differential reinforcement when reinforcement for an alternative behavior is subsequently omitted or reduced. The efficacy of differential reinforcement has long been conceptualized in terms of quantitative models of choice between concurrent operants (i.e., the matching law). Here, we provide an overview of a novel quantitative model of resurgence called Resurgence as Choice (RaC), which suggests that resurgence results from these same basic choice processes. We review the failures of the only other quantitative model of resurgence (i.e., Behavioral Momentum Theory) and discuss its shortcomings with respect to the limited range of circumstances about which it makes predictions in applied settings. Finally, we describe how RaC overcomes these shortcomings and discuss implications of the model for promoting durable behavior change.
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Affiliation(s)
- Brian D Greer
- University of Nebraska Medical Center's Munroe-Meyer Institute
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Thrailkill EA, Ameden WC, Bouton ME. Resurgence in humans: Reducing relapse by increasing generalization between treatment and testing. JOURNAL OF EXPERIMENTAL PSYCHOLOGY. ANIMAL LEARNING AND COGNITION 2019; 45:338-349. [PMID: 31033312 PMCID: PMC6724707 DOI: 10.1037/xan0000209] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Resurgence is the increase in performance of an extinguished instrumental (operant) response that accompanies the extinction of a response that has been reinforced to replace it. Resurgence may involve processes that are relevant for understanding relapse in applied and clinical settings. While resurgence is known to be a robust phenomenon in human operant extinction, the processes that control it remain unclear. Here we asked whether human resurgence is controlled by processes that are similar to those that have been identified in animals by asking whether two methods that reduce resurgence in animals also reduce it in humans. Participants first learned to make an operant response (R1) for a tangible food reinforcer (O1). In a second phase (Phase 2), R1 was extinguished while a second response (R2) was introduced and reinforced with a virtual monetary reward (USD $0.10 coins; O2). In a test phase, extinction was then introduced for R2 and resurgence of R1 was assessed. In Experiment 1, resurgence that occurred after the treatment just described was attenuated if there had been periodic exposure to R2 extinction during the treatment phase (Phase 2). In Experiment 2, resurgence was prevented when O2, but not O1, was presented noncontingently during the test. The results are among the first to suggest a mechanism underlying resurgence in humans, namely, renewal caused by contextual change. They also provide initial evidence to suggest that resurgence may be the result of common processes in animals and humans. (PsycINFO Database Record (c) 2019 APA, all rights reserved).
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Bouton ME. Extinction of instrumental (operant) learning: interference, varieties of context, and mechanisms of contextual control. Psychopharmacology (Berl) 2019; 236:7-19. [PMID: 30350221 PMCID: PMC6374202 DOI: 10.1007/s00213-018-5076-4] [Citation(s) in RCA: 68] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/17/2018] [Accepted: 10/10/2018] [Indexed: 12/16/2022]
Abstract
This article reviews recent research on the extinction of instrumental (or operant) conditioning from the perspective that it is an example of a general retroactive interference process. Previous discussions of interference have focused primarily on findings from Pavlovian conditioning. The present review shows that extinction in instrumental learning has much in common with other examples of retroactive interference in instrumental learning (e.g., omission learning, punishment, second-outcome learning, discrimination reversal learning, and differential reinforcement of alternative behavior). In each, the original learning can be largely retained after conflicting information is learned, and behavior is cued or controlled by the current context. The review also suggests that a variety of stimuli can play the role of context, including room and apparatus cues, temporal cues, drug state, deprivation state, stress state, and recent reinforcers, discrete cues, or behaviors. In instrumental learning situations, the context can control behavior through its direct association with the reinforcer or punisher, through its hierarchical relation with response-outcome associations, or its direct association (inhibitory or excitatory) with the response. In simple instrumental extinction and habit learning, the latter mechanism may play an especially important role.
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