PTSD: National Center for PTSD

Cognitive Processing Therapy for PTSD

Tara E. Galovski, PhD, Sonya B. Norman, PhD & Jessica L. Hamblen, PhD

Cognitive Processing Therapy (CPT) is a trauma-focused psychotherapy designed to treat posttraumatic stress disorder (PTSD). It is one of the most researched treatments for PTSD. A large number of studies show it is effective, including in patients with complicated presentations, such as comorbid personality disorders and other co-occurring conditions. CPT has the strongest recommendation as a treatment for PTSD in every clinical practice guideline.

Continuing Education Course

What’s the Latest in Cognitive Processing Therapy? Updates in Research and Practice

This online course reviews research evidence supporting CPT and provides clinical developments in the 2nd Edition of the CPT manual, emphasizing case conceptualization and engagement strategies.

Theoretical Model

Cognitive Processing Therapy is based on cognitive theory (1). CPT posits that individuals organize information into schemas (categories of information) to make sense of the world, interpret new information, and exert some level of prediction and control over their experiences. Traumatic events can disrupt schemas, particularly around beliefs related to safety, trust, power, esteem, and intimacy (2). PTSD results when disruptions in these schemas manifest in inaccurate self-statements, called "stuck points," that interrupt normal recovery from the traumatic experience.

There are 2 primary types of stuck points that can maintain PTSD according to CPT, assimilation and over-accommodation. During the process of assimilation, trauma information is altered to fit within the existing belief system. For example, if the existing belief is, "good things happen to good people and bad things happen to bad people," then someone who experienced sexual violence may believe that they deserved to assaulted. On the other hand, the process of over-accommodation involves extreme alteration of existing belief systems based on the new trauma information (e.g., for someone who experienced sexual assault whose perpetrator was a man, the belief that, "all men are dangerous").

These processes stand in contrast to accommodation which involves more balanced modifications of existing belief systems to integrate the new and discrepant trauma information (e.g. "Sometimes bad things happen to good people; what I was wearing had nothing to do with causing this crime. Some people are dangerous, most are not."). The process of accommodation promotes recovery from the traumatic event. Correcting inaccurate assimilated and over-accommodated stuck points and developing more accommodated, balanced beliefs is a primary goal of CPT.

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Session Content

Protocol

CPT can be administered in individual, group, or combined individual and group formats (although research suggests that the individual format is the most effective). The original CPT protocol included a detailed, written account of the traumatic event as a standard component of therapy, but later studies suggested that this therapy element was not necessary for treatment to be successful (3). Based on this research, the CPT manual (2nd Edition; 4) describes "CPT" as the cognitive-only version of the therapy.

If the trauma narrative is added to the treatment protocol, then the therapy is specified as CPT+ Account (CPT+A). Because research suggests that both CPT and CPT+A are similarly effective with no differences in dropout (5), the CPT protocol now advises the therapist to allow the patient to choose whether or not to incorporate the written trauma account.

Although CPT was originally developed as a 12-session protocol, it is acceptable to administer treatment over a variable number of sessions, depending on patient needs. Patients may end treatment prior to completing all 12 sessions if symptoms are sufficiently reduced or may extend the protocol for additional sessions to improve treatment gains. Several studies have shown that ending therapy based on patient progress yielded better results than using a proscribed number of sessions (6,7).

Primary goals

The primary goal of CPT is to identify the patient's stuck points and, through cognitive restructuring, help the patient to arrive at more accurate, balanced interpretations of the event. To accomplish these treatment goals, the patient first learns cognitive restructuring through Socratic questions. The goal is to help the patient begin to explore and modify stuck points, particularly assimilated stuck points involving self-blame, shame and hindsight bias.

Later in therapy, the patient and therapist continue to identify and examine stuck points with particular emphasis on 5 belief systems that have been found to be disrupted after exposure to a traumatic event: safety, trust, power and control, esteem, and intimacy. Throughout the protocol, the therapist provides the patient with opportunities and encouragement to explore stuck points outside of session with the aid of worksheets and other tools.

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Overall and Relative Effectiveness

CPT is one of the most studied treatments for PTSD. There have been 34 randomized controlled trials (RCTs) where one or more of the treatment arms included CPT, with more in progress (8). Meta-analyses (e.g., 9-14) suggest that CPT produces large treatment effects in regard to PTSD symptom reduction and loss of diagnosis (e.g., 12).

CPT was originally evaluated with civilian female victims of sexual assault and rape. The first RCT of CPT compared CPT to Prolonged Exposure (PE) and to a minimal attention (MA) condition in a sample of female rape survivors, most of whom (85.8%) reported multiple traumatic events including childhood sexual assault (41%). Participants in the active treatment conditions (both CPT and PE) demonstrated significant improvement in PTSD and depression over the course of treatment as compared to the MA group. Treatment gains were maintained 5-10 years after the completion of treatment (15).

The efficacy of CPT has also been demonstrated in RCTs across diverse populations including in the Democratic Republic of Congo, Iraq and Germany (16-18). CPT has been translated into 15 languages (4), has been shown to be effective when delivered through an interpreter (e.g., 19), and when delivered through telehealth (e.g., 20).

A review by the Agency for Healthcare Research and Quality (21), which used extensive criteria for evaluating study quality, included 7 RCTs of CPT. The review concluded that there is moderate strength of evidence to support the efficacy of CPT for reduction of PTSD symptoms, depression symptoms, and loss of PTSD diagnosis and that trauma-focused therapies such as CPT are the most effective treatments for PTSD.

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CPT in Clinical Practice Guidelines

CPT is recommended as a first-line treatment in all major PTSD treatment guidelines including the American Psychological Association (APA; 22), the International Society for Traumatic Stress Studies (ISTSS; 23), the United Kingdom's National Institute for Health and Care Excellence (NICE; 24), the U.S. Department of Veterans Affairs and Department of Defense (VA, DoD; 25) and the Australian Guidelines (26).

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Research With Military Personnel and Veterans

Several studies have shown CPT to be effective for treating PTSD in Veterans and service members (e.g., 27). In the first RCT with U.S. Veterans, participants were randomized to either CPT or treatment as usual (28). Those participants who received CPT demonstrated significantly more improvement in PTSD symptoms, depression, anxiety, guilt and social adjustment. Forty percent of Veterans who received CPT no longer had PTSD by the end of treatment.

A meta-analytic review of CPT in military personnel and Veterans found that compared to all comparison conditions, CPT exhibited a medium effect on PTSD symptom reduction (14). Veteran samples showed slightly greater symptom improvements than military personnel. Additionally, CPT+A showed greater effects on PTSD symptoms than CPT in this sample, further supporting that CPT+A should be offered as a treatment option.

CPT has also been shown to be effective among Australian Veterans (29) and in a sample of U.S. Veterans who had experienced military sexual trauma (30). Two non-inferiority trials demonstrated that CPT could be delivered to male and female Veterans via tele-videoconferencing (20,31). A study with active-duty military personnel found that PTSD symptoms improved more with individual than group CPT (32).

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Research With Comorbidities and Special Populations

PTSD rarely occurs in isolation and, as such, it is important that the benefits of treatment extend to individuals suffering from co-occurring disorders and conditions. To date, CPT has been shown to improve common comorbid symptoms and clinical correlates of PTSD such as depression (12,33), suicidal ideation (34), health-related concerns (35), sleep (35-37), alcohol use disorder (38), physiological reactivity (39), dissociation, and functioning across important life domains (40,41).

Continuing Education Course

Cognitive Processing Therapy for Diverse Populations

This online course reviews the research conducted adapting Cognitive Processing Therapy (CPT) diverse patient populations.

CPT is efficacious with individuals who also are diagnosed with one or more personality disorders, including borderline personality disorder (42,43). Examining data from a PTSD treatment program, Kaysen et al., (2014) found that individuals with current or past histories of alcohol use disorders reported comparable outcomes in PTSD recovery as those who denied a history of alcohol use disorders (44). Several studies have shown that CPT is efficacious in treating PTSD among patients who also suffer from traumatic brain injury (TBI; 45). CPT was found to be beneficial in treating PTSD in patients with comorbid PTSD and TBI, including moderate-severe TBIs, in an 8-week residential VA treatment program (46-48).

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CPT in Group Format

A few studies have examined CPT delivered in a group format. Resick et al. (2015) compared CPT delivered in group format to Present-Centered Therapy in active-duty military service members and found that participants who received CPT reported greater decreases in PTSD and depression (49). A second trial (32) conducted with active-duty service members compared group versus individually administered CPT. Participants improved significantly in PTSD and depression in both treatment conditions, but improvements in PTSD were significantly greater when the therapy was administered individually. Participants in each treatment condition benefited equally in regard to depression and suicidal ideation. These findings suggest that individual CPT is the most effective format.

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Emerging Issues

Current research is focused on learning whether implementing CPT in an abbreviated period of time reduces barriers and increases access to care. A recent pilot study showed there were no differences between women who received massed CPT delivered over 5 days and those that received traditional-length CPT on PTSD or related outcomes (50). Program evaluation data from intensive treatment programs serving military and Veteran patients receiving CPT have shown improvements in PTSD and depression symptoms (51,52). The first large-scale RCT of massed CPT delivered in a combination of group and individual format over 5 days is ongoing in an active-duty military sample (53). Overall, massed CPT studies have demonstrated that this treatment format is effective, feasible and may increase access for trauma survivors for whom committing to 12 or more weeks of treatment may be a barrier to care.

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References

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45. Jak, A. J., Jurick, S. M., Crocker, L. D., Sanderson-Cimino, M., Aupperle, R., Rodgers, C.S., Thomas, K. R., Boyd, B., Norman, S. B., Lang, A. J., Keller, A. V., Schiehser, D. M., & Twamley, E. W. (2019). SMART-CPT treatment for Veterans with comorbid posttraumatic stress disorder and history of traumatic brain injury: A randomised controlled trial. Journal of Neurology, Neurosurgery, and Psychiatry, 90(3), 333-341. https://doi.org/10.1136/jnnp-2018-319315
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48. Walter, K. H., Dickstein, B. D., Barnes, S. M., & Chard, K. M. (2014). Comparing effectiveness of CPT to CPT-C among U.S. Veterans in an interdisciplinary residential PTSD/TBI treatment program. Journal of Traumatic Stress, 27, 438-445. https://doi.org/10.1002/jts.21934.
49. Resick, P. A., Wachen, J. S., Mintz, J., Young-McCaughan, S., Roache, J. D., Borah, A. M., Dondanville, K. A., Hembree, E. A., Litz, B. T., & Peterson, A. L. (2015). A randomized clinical trial of group Cognitive Processing Therapy compared with group present-centered therapy for PTSD among active duty military personnel. Journal of Consulting and Clinical Psychology, 83(6), 1058-1068. https://doi.org/1-.1037/ccp0000016
50. Galovski, T. E., Werner, K. B. Weaver, K., Morris, K. A., Nanney, J., Wamser-Nanney, R., McGlinchey, G. Fortier, C. B., & Iverson, K. M. (2021). Massed Cognitive Processing Therapy for posttraumatic stress disorder in women survivors of intimate partner violence. Psychological Trauma: Theory, Research, Practice, and Policy. Online first publication. https://doi.org/10.1037/tra00001100
51. Held, P., Smith, D. L., Pridgen, S., Coleman, J. A., & Klassen, B. J. (2023). More is not always better: 2 weeks of intensive Cognitive Processing Therapy-based treatment are noninferior to 3 weeks. Psychological Trauma: Theory, Research, Practice, and Policy, 15(1), 100-109. https://doi.org/10.1037/tra0001257
52. Goetter, E. M., Blackburn, A. M., Stasko, C., Han, Y., Brenner, L. H., Lejeune, S., Tanev, K. S., Spencer, T. J., & Wright, E. C. (2021). Comparative effectiveness of prolonged exposure and cognitive processing therapy for military service members in an intensive treatment program. Psychological Trauma: Theory, Research, Practice, and Policy, 13(6), 632-640. https://doi.org/10.1037/tra0000956
53. Wachen, J. S., Morris, K.L., Galovski, T. E., Dondanville, K.A., Resick, P., Schwartz, C. (2024). Massed Cognitive Processing Therapy for combat-related posttraumatic stress disorder: Study design and methodology of a non-inferiority randomized controlled trial. Contemporary Clinical Trials, 136, 107405. https://doi.org/10.1016/j.cct.2023.107405

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