| Course | NU671 PMHNP Psychopathological Disorders and Psychotherapy |
|---|---|
| Unit | Unit 6 |
| Paper type | Theory of change comparison |
| Length | About 1,120 words, 7 pages double-spaced |
| Format | APA 7 student paper |
| School | Purdue University Global |
| Program | MSN |
| Updated | September 2026 |
Free sample paper for NU671 Unit 6
Change the Days or Change the Thoughts? A Theory of Change Comparison of Behavioral Activation and Cognitive Therapy for a 30-Year-Old Pharmacy Technician
[Student Name]
Purdue University Global
NU671: PMHNP Psychopathological Disorders and Psychotherapy
Unit 6 Theory of Change Comparison
[Instructor Name]
[Date]
The patient is composite; details are bracketed.
The Patient
Ms. [P.] moved from her hometown [eight] months ago when her partner took a hospital job. She found work as a pharmacy technician on a busy retail counter. She has no friends in the new city, has stopped running, and spends her two days off in bed or scrolling on her phone. She has major depressive disorder, moderate in severity, with low mood, loss of interest, poor sleep and fatigue. When asked why she has not joined anything, she says, "I'm boring. People here already have their friends." She is not suicidal and does not want medication.
Two well-studied therapies could be offered. Each tells a different story about why she is depressed and what must change for her to recover.
Behavioral Activation's Theory of Change
Behavioral activation views depression as a result of a loss of positive reinforcement from the environment, often following a change in circumstances. The move stripped away her sources of reward: friends, familiar places, her running club. As she withdrew, she received even less reward, and her withdrawal also served to avoid the discomfort of trying and failing to connect. Inactivity then deepened her mood, which led to more inactivity.
What changes, according to this theory: her behavior, and through it, her contact with rewarding experiences. The therapist helps her monitor her activities and mood, identify what gives her a sense of pleasure or achievement, schedule those activities in small steps and work around avoidance. Her thoughts are not challenged directly. If she thinks "I'm boring," the therapist asks what that thought leads her to do, and whether acting differently might change her experience.
For Ms. [P.], behavioral activation would start with small scheduled activities, such as a run on Saturday mornings and a visit to a running club she found online, and would track the link between these activities and her mood.
Cognitive Therapy's Theory of Change
Cognitive therapy locates the engine of depression in thinking: quick automatic thoughts on the surface and, beneath them, lasting beliefs a person holds about who she is, how others see her and what lies ahead. The move activated a belief she may have held for a long time, that she is not interesting and that people tolerate rather than like her. That belief colored how she read her new situation and led her to withdraw.
What changes, according to this theory: her thoughts and, eventually, her underlying beliefs. The therapist helps her identify automatic thoughts such as "I'm boring," examine the evidence for them, generate alternatives and test them through behavioral experiments. Change in beliefs is expected to reduce symptoms and to protect against relapse.
For Ms. [P.], cognitive therapy would examine the thought "People here already have their friends," look at the evidence, and design an experiment such as joining the running club to see how people actually respond.
Where the Theories Overlap
The two therapies look similar in practice. Both would probably get Ms. [P.] to the running club. The difference lies in the reason: in behavioral activation, going is the treatment; in cognitive therapy, going is an experiment to test a belief. The theories agree about what she should do on Saturday and disagree about why doing it will help.
What the Trials Say About the Mechanism
If cognitive therapy works by changing thoughts, then removing the cognitive components should weaken it. Jacobson and colleagues tested this in a component analysis with [150] outpatients, comparing the behavioral activation component of cognitive therapy alone, behavioral activation with work on automatic thoughts, and full cognitive therapy. The full treatment did not produce better outcomes than either component, at the end of treatment or at six months. Behavioral activation alone changed negative thinking and attributional style as much as full cognitive therapy did (Jacobson et al., 1996). This suggests that thought change may be a result of improvement rather than its cause, which challenges cognitive therapy's theory of change.
A later trial compared behavioral activation, cognitive therapy, antidepressant medication and placebo in [241] adults. Among the more severely depressed, behavioral activation was comparable to medication, and both outperformed cognitive therapy (Dimidjian et al., 2006). The COBRA trial then tested whether behavioral activation delivered by junior mental health workers could match cognitive behavioral therapy delivered by psychological therapists; at [12] months, behavioral activation was not inferior and cost less (Richards et al., 2016).
How Each Therapy Would Measure Progress
The theories also differ in what they would watch. A behavioral activation therapist would track Ms. [P.]'s weekly activity log: how many hours she spent in bed on days off, how many scheduled activities she completed, and her mood rating after each. Progress means more activity and a visible link between activity and mood. A cognitive therapist would track her belief ratings: how strongly, from 0 to 100, she believes "I'm boring" at the start of each session, and how much she believes the alternative thoughts she has built. Progress means lower belief in the old thought and a more balanced view of herself. Both would measure her depression with the same standardized scale, but the process measures reveal what each therapy thinks is doing the work. If her mood lifts while her belief rating barely moves, the result would fit behavioral activation's account better than cognitive therapy's.
What the Trials Do Not Show
These trials show that behavioral activation is as effective as cognitive therapy for many patients, and that full cognitive therapy does not add clear benefit over its behavioral components. They do not prove that behavioral activation's own theory of change is correct. A patient who becomes active may also change her beliefs, and the trials were not designed to settle which change drives recovery. Both theories may describe parts of the same process.
Implications for Ms. [P.]
Three points follow for her care. First, either therapy is a reasonable choice, and her preference should count. She has said she does not want to "talk about her feelings for months," which fits behavioral activation's focus on action. Second, behavioral activation is simpler to deliver and can be provided effectively by less specialized staff, which matters if her insurance limits access. Third, if her belief that she is uninteresting persists after her mood improves, targeted cognitive work could still help prevent relapse. A plan that begins with behavioral activation and adds cognitive techniques if needed respects both the evidence and her preference.
References
Dimidjian, S., Hollon, S. D., Dobson, K. S., Schmaling, K. B., Kohlenberg, R. J., Addis, M. E., Gallop, R., McGlinchey, J. B., Markley, D. K., Gollan, J. K., Atkins, D. C., Dunner, D. L., & Jacobson, N. S. (2006). Randomized trial of behavioral activation, cognitive therapy, and antidepressant medication in the acute treatment of adults with major depression. Journal of Consulting and Clinical Psychology, 74(4), 658-670. https://doi.org/10.1037/0022-006X.74.4.658
Jacobson, N. S., Dobson, K. S., Truax, P. A., Addis, M. E., Koerner, K., Gollan, J. K., Gortner, E., & Prince, S. E. (1996). A component analysis of cognitive-behavioral treatment for depression. Journal of Consulting and Clinical Psychology, 64(2), 295-304. https://doi.org/10.1037/0022-006X.64.2.295
Richards, D. A., Ekers, D., McMillan, D., Taylor, R. S., Byford, S., Warren, F. C., Barrett, B., Farrand, P. A., Gilbody, S., Kuyken, W., O'Mahen, H., Watkins, E. R., Wright, K. A., Hollon, S. D., Reed, N., Rhodes, S., Fletcher, E., & Finning, K. (2016). Cost and outcome of behavioural activation versus cognitive behavioural therapy for depression (COBRA): A randomised, controlled, non-inferiority trial. The Lancet, 388(10047), 871-880. https://doi.org/10.1016/S0140-6736(16)31140-0
Reading the NU 671 Unit 6 instructions
For Unit 6 you compare two psychotherapies by their theories of change, applied to one patient. Prompts usually want each therapy's explanation of the disorder, its proposed mechanism of improvement, how it would be applied to the case, and the evidence on both outcome and mechanism. Four to six pages in APA style is typical. Graders reward comparisons that go beyond listing techniques to state what process each therapy says produces recovery, and that use dismantling or mediation evidence where it exists. The conclusion should say what the evidence supports and what it leaves open, and it should account for the patient's preferences when choosing between two therapies with similar outcomes.
How the NU 671 Unit 6 example is put together
The patient's move, her withdrawal and her belief that she is boring are described first. Behavioral activation's theory follows, with what it would change and what it would do in her first weeks. Cognitive therapy's theory follows the same pattern. A short section shows where the two overlap in practice, with a highlighted sentence on their agreement and disagreement. A section on progress measures contrasts activity logs with belief ratings. The trials section reports the component analysis first, since it tests mechanism, then the Dimidjian comparison and COBRA. A section states what the trials cannot show, and the implications section proposes behavioral activation first, with cognitive techniques if her belief persists.
NU671 Unit 6 rubric: what earns full points
Points for a theory of change comparison usually go to accuracy of each theory, depth of comparison, use of mechanism evidence, application to the case and clinical judgment. Accuracy covers each therapy's model of depression and its intended mechanism. Depth rewards identifying where the therapies overlap in practice and where they truly differ. Mechanism evidence earns credit when dismantling or component trials are used to test what each theory predicts, rather than outcome trials alone. Application is judged on concrete plans for the patient under each approach. Clinical judgment points go to a recommendation that weighs evidence, delivery and the patient's stated preferences together. Precise citations also count.
NU671 Unit 6 help from the desk
Students often describe each therapy's techniques without saying what process is supposed to produce improvement. Another common error is citing outcome trials as if they settled the question of mechanism. Some papers overlook the component analysis, which is the most direct test of cognitive therapy's theory. Others declare a winner that the evidence does not support. Comparisons that never apply either therapy to the patient read like a textbook chapter. And ignoring the patient's own preference, when two therapies perform similarly, misses the one factor that can decide between them in her case and improve her engagement. Keep the patient's own words in view, because they show which theory she already finds convincing.
Get an NU671 Unit 6 example written to your instructions
Which two therapies does your NU671 Unit 6 prompt compare, and is there a case? Send the prompt, any case text and the rubric. Built to that brief, and free when it is a first request, the comparison arrives within 24-48h with both theories stated in their own terms, asked identical questions and tested against mechanism research. The paper above is an original model document written by our desk, not a submitted student paper and not an official Purdue University Global document.
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NU671 Unit 6 questions, answered
Is a theory of change the same as a list of techniques?
No. A theory of change says what process produces improvement: altered beliefs, resolved interpersonal problems, increased reinforcement, new learning about feared outcomes. Techniques are how a therapy tries to set that process moving. A strong comparison states each theory first and treats techniques as evidence of what the approach believes matters most.
Should the paper pick a winner?
To the extent the evidence permits, which for many common disorders is not very far. Where outcome trials show similar results, the honest conclusion is that fit with the person and their preference should guide the choice. Declaring a winner the data do not support tends to cost more credit than a well-argued tie.
What counts as mechanism evidence?
Studies testing whether the process a therapy targets actually changes first and then predicts later improvement. Mediation analyses, component or dismantling trials, and session-by-session measurement all contribute. Many therapies have strong outcome evidence and weak mechanism evidence, and saying so accurately is part of what this unit rewards.
Where can I find a free NU671 Unit 6 sample paper?
The full NU671 Unit 6 theory of change comparison is available on this page, with both theories applied to the patient, the process measures, the trial evidence and the plan, plus three references. A comparison of other therapies can be written to your prompt.
What did the component analysis show in NU671 Unit 6?
In 150 outpatients, full cognitive therapy did not outperform its behavioral activation component alone, and behavioral activation changed negative thinking as much as full cognitive therapy did. That suggests thought change may follow improvement rather than cause it.