Feasibility of Group Schema Therapy for Outpatients with Severe Borderline Personality Disorder in Germany: A Pilot Study with Three Year Follow-Up

The Effectiveness of Dialectical Behavior Therapy Compared to Schema Therapy for Borderline Personality Disorder: A Randomized Clinical Trial

INTRODUCTION

In the treatment of borderline personality disorder (BPD), there is empirical support for both dialectical behavior therapy (DBT) and schema therapy (ST); these treatments have never been compared directly. This study examines whether either of them is more effective than the other in treating patients with BPD.

METHODS

In this randomized, parallel-group, rater-blind clinical trial, outpatients aged between 18 and 65 years with a primary diagnosis of BPD were recruited in a tertiary outpatient treatment center (Lübeck, Germany). Participants were randomized to DBT or ST with one individual and one group session per week over 1.5 years. The primary outcome was the BPD symptom severity assessed with the mean score of the Borderline Personality Disorder Severity Index at 1-year naturalistic follow-up.

RESULTS

Between November 26, 2014, and December 14, 2018, we enrolled 164 patients (mean age = 33.7 [SD = 10.61] years). Of these, 81 (49.4%) were treated with ST and 83 (50.6%) with DBT, overall, 130 (79.3%) were female. Intention-to-treat analysis with generalized linear mixed models did not show a significant difference at 1-year naturalistic follow-up between DBT and ST for the BPDSI total score (mean difference 3.32 [95% CI: -0.58-7.22], p = 0.094, d = -24 [-0.69; 0.20]) with lower scores for DBT. Pre-to-follow-up effect sizes were large in both groups (DBT: d = 2.45 [1.88-3.02], ST: d = 1.78 [1.26-2.29]).

CONCLUSION

Patients in both treatment groups showed substantial improvements indicating that even severely affected patients with BPD and various comorbid disorders can be treated successfully with DBT and ST. An additional non-inferiority trial is needed to show if both treatments are equally effective. The trial was retrospectively registered on the German Clinical Trials Register, DRKS00011534 without protocol changes.

One-Year Follow-Up: Schema Therapy for Patients With Borderline Personality Disorder and Comorbid Alcohol Use Disorder

This article describes the 1-year follow-up of a study into the effectiveness of Schema Therapy (ST) for borderline personality disorder (BPD) and comorbid alcohol use disorder (AUD). In the original study, 20 of these patients participated in a multiple baseline case series design study. The results of the original study were promising (a significant decrease of BPD and AUD symptoms). The present study is aimed at examining the longer term benefits of ST for BPD and comorbid AUD. One year after the cessation of the investigational therapy, 17 of the original participants agreed to participate in this follow-up study. T- or Wilcoxon signed rank tests were performed to compare 1-year follow-up to start of therapy (baseline). The results suggest that the main therapeutic improvements were generally preserved at 1-year follow-up. These findings add to the idea that integrated ST for BPD and comorbid AUD might be effective, also in the long term. A randomized clinical trial is indicated to substantiate this idea.

Chairwork in schema therapy for patients with borderline personality disorder-A qualitative study of patients' perceptions

Objective

Chairwork is one of the core experiential techniques of Schema Therapy (ST) which is used in the treatment of patients with borderline personality disorder (BPD). However, little is known about how people with BPD experience chairwork. The aim of this study was to explore the experiences of patients with BPD with chairwork in ST.

Method

Qualitative data were collected through semi-structured interviews with 29 participants with a primary diagnosis of BPD who experienced chairwork as part of their ST treatment. The interview data were analyzed using qualitative content analysis.

Findings

Many participants reported initial skepticism, and difficulties with engaging in chairwork. Specific therapist behaviors as well as some external (e.g., restricted facilities, noise) and internal factors (especially feeling ashamed or ridiculous) were named as hindering factors. Participants described several therapist behaviors facilitating chairwork such as providing safety, clear guidance through the process as well as flexible application of the technique according to their needs, and sufficient time for debriefing. Participants experienced emotional pain and exhaustion as short-term effects of the technique. All participants reported positive long-term effects including an improved understanding of their mode model as well as positive mode changes (e.g., less Punitive Parent and more Healthy Adult Mode), greater self-acceptance, improvements in coping with emotions and needs as well as improvements in interpersonal relationships.

Conclusions

Chairwork is experienced as an emotionally demanding but valuable technique. Based on the participants' statements, the delivery of chairwork can be optimized which can help to improve treatment outcome.

A Systematic Review of the Heterogeneity of Schema Therapy

We aimed to explore the heterogeneity of schema therapy regarding (a) patient characteristics, (b) content, and (c) way of delivering schema therapy. A search was conducted of the electronic databases EMBASE, PsycINFO, Web of Science, MEDLINE, and COCHRANE up to June 15, 2022. Treatment studies were eligible if they (a) used schema therapy as (component of) the intervention examined, and (b) reported an outcome measure quantitatively. A total of 101 studies met the inclusion criteria, including randomized controlled trials (n = 30), non-randomized controlled trials (n = 8), pre-post designs (n = 22), cases series (n = 13), and case reports (n = 28), including 4006 patients. Good feasibility was consistently reported irrespective of format (group versus individual), setting (outpatient, day-treatment, inpatient), intensity of treatment, and the specific therapeutic components included. Schema therapy was applied to various (psychiatric) disorders. All studies presented promising results. Effectiveness of the different models of schema therapy as well as application beyond personality disorders should be examined more rigorously.

Are the schema modes suitable for explaining borderline and narcissistic behaviours?

Jeffrey Young assumes that people suffering from personality disorders differ from healthy ones in schema modes intensity but not diversity. Besides, healthy people also present behaviours typical for personality disorders, but to a lesser extent. However, research lacks the interrelationships between modes, especially in healthy individuals. The presented study aimed to investigate the mutual relations between the schema modes using path analysis to understand better problematic behaviour in borderline and narcissistic types in a non-clinical sample and to verify Young assumption about the continuum of the schema modes. A sample of 467 healthy adults aged 18–50 (M = 32.87, SD = 10.56), 52.9% of whom were women, completed SMI 1.1 and SCID-II. Descriptive statistics, matrix of correlation and structural equation modelling were used. Results confirmed the significance of the theoretically assumed and previously empirically proved schema modes also for healthy people. The most important modes for both borderline and narcissistic behaviours are the Punitive Parent, the Angry Child and the Enraged Child modes. For borderline behaviour, the Detached Protector coping mode, connected to a sense of emptiness, is significant. Narcissistic behaviour relates to Bully and Attack, and Self-Aggrandiser modes and is connected to aggressive and dominant behaviour. The obtained models explain 47% of the variance in borderline and 44% in narcissistic behaviours. The study indicates the validity of analysing the modes among people with lower intensity of behaviours typical for personality disorders and also confirms Young’s assumptions about the universality of schema modes. Results are discussed in the context of their relevance for practitioners.

Exploring the effect of group schema therapy and comorbidity on the treatment course of personality disorders

PURPOSE OF REVIEW

To provide an update of outcome studies of schema group therapy for personality disorders and the effect of comorbidity in order to explore whether schema group therapy might be effective for this patient group and what dosage is required.

RECENT FINDINGS

Studies of short-term schema group therapy for personality disorders with or without comorbidity show moderately effective results but the majority of patients fail to achieve full remission from global psychological symptom distress. Preliminary findings revealed that those unremitted patients might benefit from 40 to 60 sessions. Patients with severe personality disorders (such as borderline personality disorders) seem to need longer and/or more intensive treatment dosage to recover.

SUMMARY

We advocate short-term schema therapy in groups as a valuable first step in a stepped-care programme for patients with moderate personality disorders and comorbidity.Treatment extension or treatment intensification may be indicated in patients who do not recover. Patients with severe personality disorders seem to require long-term outpatient group treatment, with a combination of group and individual treatment being preferable. High-quality randomized controlled trials are needed in order to determine which treatment dosage is necessary for whom.

Addressing the punitive parent mode in schema therapy for borderline personality disorder: Short-term effects of the empty chair technique as compared to cognitive challenging

BACKGROUND AND OBJECTIVES

In Schema Therapy (ST) for Borderline Personality Disorder (BPD) patients the empty chair technique (EC) is often used to diminish the 'punitive parent mode' (PP). The present study is a first attempt to assess whether EC is more effective in reducing the PP than a standard Cognitive Behavioral Therapy technique (CT).

METHODS

We utilized a counterbalanced, crossover design comparing one EC session to one CT session in twenty patients with a primary BPD diagnosis who had started ST. Before and after each intervention we assessed credibility, power, and valence of the PP-associated core belief and how much power patients felt over this core belief (dominance). Patients also completed a working alliance inventory. An interview was conducted to explore subjective views regarding the interventions.

RESULTS

Both techniques reduced power and credibility of the PP-associated core belief and increased dominance. CT reduced credibility more strongly than EC. Still, patients preferred EC as they felt it was better able to elicit feelings during the session and believed it would be more effective than CT when administered repeatedly.

LIMITATIONS

A complex technique was tested early in treatment and only once, effects might be different later in treatment and when applied repeatedly. Moreover, only short-term effects were assessed in a rather small sample.

CONCLUSION

Both EC and CT help combat the PP in BPD patients, with CT being more effective in reducing credibility after one session. However, patients preferred EC and suggest multiple sessions might be needed to truly elucidate differences between both techniques.

Looking at the bigger picture: Cortical volume, thickness and surface area characteristics in borderline personality disorder with and without posttraumatic stress disorder

Borderline personality disorder (BPD) is a severe psychiatric disorder accompanied by multiple comorbidities. Neuroimaging studies have identified structural abnormalities in BPD with most findings pointing to gray matter volume reductions in the fronto-limbic network, although results remain inconsistent. Similar alterations were found in posttraumatic stress disorder (PTSD), a common comorbidity of BPD. Only a small number of studies have investigated structural differences in BPD patients regarding comorbid PTSD specifically and studies conducting additional surface analyses are scarce. We investigated structural differences in women with BPD with and without PTSD and non-patient controls. Automated voxel-based and region-based volumetric analyses were applied. Additionally, four surface-based measures were analyzed: cortical thickness, gyrification index, fractal dimension, and sulcus depth. Analyses did not identify cortical volume alterations in the fronto-limbic network. Instead, hypergyrification was detected in the right superior parietal cortex in BPD patients compared to non-patient controls. No distinction was revealed between BPD patients with and without PTSD. These findings underline the importance of a holistic investigation examining volumetric and surface measures as these might enhance the understanding of structural alterations in BPD.

Effectiveness of brief schema group therapy for borderline personality disorder symptoms: a randomized pilot study

BACKGROUND AND OBJECTIVES

Schema group therapy is a potentially cost-effective treatment for borderline personality disorder (BPD). We piloted the feasibility and effectiveness of a 20-session schema group therapy without individual therapy among psychiatric BPD outpatients in a randomized pilot study registered as a clinical trial (ISRCTN76381242).

METHODS

Altogether 42 psychiatric outpatients diagnosed with BPD were randomized 2:1 to a 20-session weekly schema group therapy plus treatment as usual (TAU) (n = 28) vs. a control group with TAU alone (n = 14). The primary outcome was decline of BPD symptoms in the short Borderline Symptom List (BSL-23) score. Secondary outcomes were decline in symptoms of anxiety, depression, alcohol use, and improvement in functioning and schema modes. Two external experts evaluated validity of the intervention based on videotaped sessions.

RESULTS

Overall, 23 schema group therapy patients (82%) and 12 controls (86%) completed their treatment. Treatment validity good or very good. However, no significant differences emerged in the primary outcome mean BSL-23 decline (6.95 [SE 5.91] in group schema therapy vs. 12.55 [4.85] in TAU) or in any of the secondary outcome measures.

LIMITATIONS

Despite randomization, the TAU subgroup had non-significantly higher baseline scores in most measures. Small sample size predisposing to type II errors; reliance on self-reported outcomes.

CONCLUSIONS

Schema group therapy was feasible for psychiatric outpatients with BPD. However, in this small pilot study we did not find it more effective than TAU. Effectiveness of this short intervention remains open.

The network structure of schema modes

A fundamental question in psychotherapy is whether interventions should target client problems (i.e., problem-focused approaches) or client strengths (i.e., strength-focused approaches). In this study, we first propose to address this question from a network perspective on schema modes (i.e., healthy or dysfunctional patterns of co-occurring emotions, cognitions, and behaviours). From this perspective, schema modes mutually influence each other (e.g., healthy modes reduce dysfunctional modes). Recent evidence suggests that changes in modes that are strongly associated to other modes (i.e., central modes) could be associated with greater treatment effects. We therefore suggest research should investigate the relative centrality of healthy and dysfunctional modes. To make an exploratory start, we investigated the cross-sectional network structure of schema modes in a clinical (comprising individuals diagnosed with paranoid, narcissistic, histrionic, and Cluster C personality disorders) and non-clinical sample. Results showed that, in both samples, the Healthy Adult was significantly less central than several dysfunctional modes (e.g., Undisciplined Child and Abandoned and Abused Child). Although our study cannot draw causal conclusions, this finding could suggest that weakening dysfunctional modes (compared to strengthening the Healthy Adult) might be more effective in decreasing other dysfunctional modes. Our study further indicates that several schema modes are negatively associated, which could suggest that decreasing one might increase another. Finally, the Healthy Adult was among the modes that most strongly discriminated between clinical and non-clinical individuals. Longitudinal and experimental research into the network structure of schema modes is required to further clarify the relative influence of schema modes.

Schema therapy versus cognitive behavioral therapy versus individual supportive therapy for depression in an inpatient and day clinic setting: study protocol of the OPTIMA-RCT

BACKGROUND

Major depressive disorder represents (MDD) a major cause of disability and disease burden. Beside antidepressant medication, psychotherapy is a key approach of treatment. Schema therapy has been shown to be effective in the treatment of psychiatric disorders, especially personality disorders, in a variety of settings and patient groups. Nevertheless, there is no evidence on its effectiveness for MDD in an inpatient nor day clinic setting and little is known about the factors that drive treatment response in such a target group.

METHODS

In the current protocol, we outline OPTIMA (OPtimized Treatment Identification at the MAx Planck Institute): a single-center randomized controlled trial of schema therapy as a treatment approach for MDD in an inpatient and day clinic setting. Over the course of 7 weeks, we compare schema therapy with cognitive behavioral therapy and individual supportive therapy, conducted in individual and group sessions and with no restrictions regarding concurrent antidepressant medication, thus approximating real-life treatment conditions. N = 300 depressed patients are included. All study therapists undergo a specific training and supervision and therapy adherence is assessed. Primary outcome is depressive symptom severity as self-assessment (Beck Depression Inventory-II) and secondary outcomes are clinical ratings of MDD (Montgomery-Asberg Depression Rating Scale), recovery rates after 7 weeks according to the Munich-Composite International Diagnostic Interview, general psychopathology (Brief Symptom Inventory), global functioning (World Health Organization Disability Assessment Schedule), and clinical parameters such as dropout rates. Further parameters on a behavioral, cognitive, psychophysiological, and biological level are measured before, during and after treatment and in 2 follow-up assessments after 6 and 24 months after end of treatment.

DISCUSSION

To our knowledge, the OPTIMA-Trial is the first to investigate the effectiveness of schema therapy as a treatment approach of MDD, to investigate mechanisms of change, and explore predictors of treatment response in an inpatient and day clinic setting by using such a wide range of parameters. Insights from OPTIMA will allow more integrative approaches of psychotherapy of MDD. Especially, the identification of intervention-specific markers of treatment response can improve evidence-based clinical decision for individualizing treatment.

TRIAL REGISTRATION

Identifier on clinicaltrials.gov : NCT03287362 ; September, 12, 2017.

Experiences of Patients With Borderline Personality Disorder With Imagery Rescripting in the Context of Schema Therapy-A Qualitative Study

Imagery Rescripting (IR) is a therapeutic technique that is used in a wide spectrum of therapeutic methods for various mental disorders. As an important component of Schema Therapy (ST), IR is frequently used in the treatment of patients with borderline personality disorder (BPD). However, little is known about how IR is experienced by individuals with BPD. The aim of this study was to explore BPD patients' experiences with receiving IR. Qualitative data were collected through semi-structured interviews with 21 individuals (86% females) with a primary diagnosis of BPD who received IR within their ST treatment. Interview data were analyzed following the procedures of qualitative content analysis. Participants reported various effects of IR including initial high emotionality and exhaustion. Long-term effects included a better understanding of schemas and an improvement regarding emotion regulation and interpersonal relationships. Participants reported factors hindering the successful implementation of IR, such as external noise, stress, and a fast pace during IR. Facilitating factors included adequate time for debriefing, a transparent structure, and preparation of IR as well as the therapist providing safety. Implications of the findings for optimizing IR in clinical practice are discussed.

Short Imagery Rescripting Intervention to Treat Emotionally Dysregulated Behavior in Borderline Personality Disorder: An Exploratory Study

BACKGROUND

Current research on borderline personality disorder report an association between emotionally dysregulated behaviors and intrusive mental imagery depicting similar scenes. Imagery rescripting techniques have proven effective in reducing intrusive mental imagery in numerous contexts. We developed a two session-short intervention in which intrusive mental images are identified, analyzed, and modified for daily rehearsal at home. This study aimed to reduce the negative emotions and cognitions associated with self-injurious behaviors by replacing unhealthy imagery with more adaptive content.

METHODS

Seven females diagnosed with borderline personality disorder who reported intrusive mental imagery of dysregulated behaviors were recruited for participation. Each participant engaged in two individualized treatment sessions and daily homework requiring the rehearsal of modified imagery. Emotion regulation strategies, borderline symptom severity, and depressiveness were assessed before and after treatment.

RESULTS

Acceptance was positive, as no patient dropped out from treatment. Symptom exacerbation was not observed. Borderline symptom reduction was noted and indicia of emotional dysregulation and negative affect declined.

LIMITATIONS

The generalizability of results is limited by the small sample size and the absence of a control group. Conclusions: This new two-session short intervention was shown to decrease the emotionally dysregulated behaviors that accompany negative feelings in females with borderline personality disorder.

A Schema Therapy-Based eHealth Program for Patients with Borderline Personality Disorder (priovi): Naturalistic Single-Arm Observational Study

BACKGROUND

Electronic health (eHealth) programs have been found to be effective in treating many psychological conditions. However, regarding borderline personality disorder (BPD), only a few eHealth programs have been tested, involving small interventions based on the dialectical behavior therapy treatment approach. We investigated priovi, a program based on the schema therapy (ST) approach. priovi is considerably more comprehensive than prior programs, offering broad psychoeducation content and many therapeutic exercises.

OBJECTIVE

We tested the acceptability and feasibility of priovi in 14 patients with BPD as an add-on to individual face-to-face ST.

METHODS

Patients received weekly individual ST and used priovi over a period of 12 months. We assessed BPD symptom severity using self-reported and interview-based measures. Qualitative interviews were conducted with both patients and therapists to assess their experiences with priovi.

RESULTS

BPD symptoms improved significantly (Cohen d=1.0). Overall, qualitative data showed that priovi was positively received by both patients and therapists. Some exercises provoked mild anxiety; however, no serious threat to safety was detected.

CONCLUSIONS

priovi is a potentially helpful and safe tool that could support individual ST. It needs to be further tested in a randomized controlled study.

TRIAL REGISTRATION

German Clinical Trials Register DRKS00011538; https://www.drks.de/drks_web/navigate.do? navigationId=trial.HTML&TRIAL_ID=DRKS00011538 (Archived by WebCite at http://www.webcitation.org/74jb0AgV8).

Schema therapy for borderline personality disorder: A qualitative study of patients' perceptions

Schema therapy (ST) has been found to be effective in the treatment of borderline personality disorder (BPD). However very little is known about how the therapy is experienced by individuals with BPD including which specific elements of ST are helpful or unhelpful from their perspectives. The aim of this study is to explore BPD patients’ experiences of receiving ST, in intensive group or combined group-individual format. Qualitative data were collected through semi-structured interviews with 36 individuals with a primary diagnosis of BPD (78% females) who received ST for at least 12 months. Participants were recruited as part of an international, multicenter randomized controlled trial (RCT). Interview data (11 Australian, 12 Dutch, 13 German) were analyzed following the procedures of qualitative content analysis. Patients’ perceptions of the benefits gained in ST included improved self-understanding, and better awareness and management of their own emotional processes. While some aspects of ST, such as experiential techniques were perceived as emotionally confronting, patient narratives informed that this was necessary. Some recommendations for improved implementation of ST include the necessary adjunct of individual sessions to group ST and early discussion of therapy termination. Implications of the findings are also discussed, in particular the avenues for assessing the suitability of patients for group ST; management of group conflict and the optimal format for delivering treatment in the intensive group versus combined group-individual formats.

PRO*BPD: effectiveness of outpatient treatment programs for borderline personality disorder: a comparison of Schema therapy and dialectical behavior therapy: study protocol for a randomized trial

BACKGROUND

Borderline Personality Disorder (BPD) is a severe mental illness that is associated with low quality of life, low psychosocial functioning, and high societal costs. Treatments for BPD have improved in the last decades. Dialectical behavior therapy (DBT) and Schema therapy (ST) have demonstrated efficacy in reducing BPD symptoms and costs. However, research has not compared these two treatment approaches. In addition, there is a lack of 'real world studies' that replicate positive findings in regular mental healthcare settings. Thus, the PROgrams for Borderline Personality Disorder (PRO*BPD) study will compare the (cost-) effectiveness of DBT and ST in structured outpatient treatment programs in the routine clinical setting of an outpatient clinic.

METHODS/DESIGN

We aim to recruit 160 BPD patients, who will be randomly assigned to either DBT or ST. In both conditions, patients receive one group therapy and one individual therapy session/week for a maximum of 18 months. Both treatment programs have similar frameworks, which guarantee clinical equipoise. The primary outcome is a reduction of BPD-symptoms. Also, the costs related to BPD are assessed and an economic evaluation is performed from a societal perspective. Secondary outcomes examine other measures of BPD-typical and general psychopathology, comorbidity, quality of life, psychosocial functioning and participation. Data are collected prior to the beginning therapy and every six months until the end of therapy, as well as at six months, one year and two years of follow-up after the end of therapy. Finally, we conduct a qualitative study to understand patients' experiences with the two methods.

DISCUSSION

The PRO*BPD study is the first randomized trial to compare the (cost-) effectiveness of DBT and ST. By examining the clinical effectiveness of a broad spectrum of outcome parameters, conducting an economic evaluation and assessing patients' experiences, this study will significantly advance our knowledge on psychotherapy for BPD and will provide insight into the treatment approaches that should be offered to different BPD patients from clinical, economic and stakeholder's perspectives.

TRIAL REGISTRATION

German Clinical Trial Register, DRKS00011534 , Date of registration: 11/01/2017, retrospectively registered.

Exclusion-Proneness in Borderline Personality Disorder Inpatients Impairs Alliance in Mentalization-Based Group Therapy

Interpersonal sensitivity, particularly threat of potential exclusion, is a critical condition in borderline personality disorder (BPD) which impairs patients’ social adjustment. Current evidence-based treatments include group components, such as mentalization-based group therapy (MBT-G), in order to improve interpersonal functioning. These treatments additionally focus on the therapeutic alliance since it was discovered to be a robust predictor of treatment outcome. However, alliance is a multidimensional factor of group therapy, which includes the fellow patients, and may thus be negatively affected by the exclusion-proneness of BPD patients. The aim of this pilot study was to examine the predictive value of threat of social exclusion for the therapeutic alliance in MBT-G. In the first part of the study, social exclusion was experimentally induced in 23 BPD inpatients and 28 healthy subjects using the Cyberball paradigm, a virtual ball tossing game. The evoked level of threat was measured with the Need-Threat Scale (NTS) which captures four dimensions of fundamental human needs, i.e., the need for belongingness, for self-esteem, for control, and for a meaningful existence. In the second part of the study, therapeutic alliance was measured on three dimensions, the therapists, the fellow patients and the group as a whole, using the Group-Questionnaire (GQ-D). BPD patients scored higher in their level of threat according to the NTS in both, the inclusion and the exclusion condition. The level of threat after exclusion predicted impairments of the therapeutic alliance in MBT-G. It was associated with more negative relationships, lower positive bonding and a lower positive working alliance with the fellow patients and lower positive bonding to the group as a whole whilst no negative prediction of the alliance to the therapists was found. Consequently, our translational study design has shown that Cyberball is an appropriate tool to use as an approach for clinical questions. We further conclude that exclusion-proneness in BPD is a critical feature with respect to alliance in group treatments. In order to neutralize BPD patients’ exclusion bias, therapists may be advised to provide an “inclusive stance,” especially in initial sessions. It is also recommendable to strengthen patient to patient relations.

The Development and Psychometric Evaluation of the Group Schema Therapy Rating Scale – Revised

Background: Recent research has supported the efficacy of schema therapy as a treatment for personality disorders. A group format has been developed (group schema therapy; GST), which has been suggested to improve both the clinical and cost-effectiveness of the treatment. Aims: Efficacy studies of GST need to assess treatment fidelity. The aims of the present study were to improve, describe and evaluate a fidelity measure for GST, the Group Schema Therapy Rating Scale – Revised (GSTRS-R). Method: Following a pilot study on an initial version of the scale (GSTRS), items were revised and guidelines were modified in order to improve the reliability of the scale. Students highly experienced with the scale rated recorded GST therapy sessions using the GSTRS-R in addition to a group cohesion measure, the Harvard Community Health Plan Group Cohesiveness Scale – II (GCS-II). The scores were used to assess internal consistency and inter-rater reliability. Discriminant validity was assessed by comparing the scores on the GSTRS-R with the GCS-II. Results: The GSTRS-R displayed substantial internal consistency and inter-rater reliability, and adequate discriminate validity, evidenced by a weak positive correlation with the GCS-II. Conclusions: Overall, the GSTRS-R is a reliable tool that may be useful for evaluating therapist fidelity to GST model, and assisting GST training and supervision. Initial validity was supported by a weak association with GCS-II, indicating that although associated with cohesiveness, the instrument also assesses factors specific to GST. Limitations are discussed.