9.6 Intervention Planning, Adaptation, and Informed Consent

Building an intervention plan that can be defended

A treatment plan is a decision document, not a formality. It should show how the psychologist understands the problem, what change is being targeted, what method will be used, why that method fits, and how progress will be evaluated. On EPPP Part 2-Skills, intervention questions often turn on whether the candidate can connect evidence, assessment findings, client context, and professional limits into a coherent next step.

The plan begins with case formulation. Diagnosis may be part of the formulation, but it is not the whole plan. The psychologist also considers maintaining factors, strengths, culture, family and system context, readiness for change, risk, medical or substance factors, and prior treatment response. A strong plan names the intervention target in observable terms, such as panic avoidance, trauma reminders, parent-child coercive cycles, insomnia behavior, compulsions, or medication-adherence barriers, so that progress can later be measured against it.

Adaptation that preserves the mechanism

Adaptation is tested heavily because real clients do not resemble textbook cases. A psychologist may adapt language level, metaphors, family involvement, session length, homework format, telehealth procedures, or accessibility supports. The non-negotiable rule is preserving the intervention's active ingredients. If exposure therapy degrades into reassurance-seeking, or behavioral activation collapses into supportive conversation alone, the adaptation no longer delivers the intended mechanism and may waste the dose.

When an adaptation would gut the mechanism, the better choice is a different evidence-supported method or consultation with a specialist.

Informed consent must be active and understandable, not a signature on a form. Per the APA Ethics Code (Standard 3.10 and 10.01), clients should understand the nature and purpose of services, expected benefits, foreseeable risks, alternatives (including the option of no treatment), confidentiality limits, fees when relevant, and the psychologist's role. In assessment-linked intervention, the psychologist also explains how results will be used.

For minors, mandated clients, couples, families, and organizations, consent and assent issues become more complex, and the exam expects role clarity, such as who the client is and who holds privilege, before services begin.

Knowing when to refer or coordinate

Intervention planning checklist:

• Confirm the referral question, diagnosis or formulation, and current risk level.
• Define measurable treatment goals with the client when possible.
• Select an evidence-informed method that fits the target and setting.
• Discuss benefits, risks, alternatives, confidentiality limits, and roles.
• Coordinate care when medical, school, family, or system factors affect treatment.
• Identify progress measures and decision points for revising the plan.

Part 2 frequently asks when to refer. Referral is appropriate when the client's needs exceed the psychologist's competence, the required service falls outside the role, a conflict prevents objectivity, the setting cannot provide adequate care, or the client needs a higher level of care such as inpatient or intensive outpatient treatment. Referral should be handled responsibly, with continuity planning and attention to safety. It should not be used to avoid a difficult but appropriate case solely because the psychologist feels uncomfortable.

Coordination can itself be part of intervention. A client with serious depression may need collaboration with a prescriber; a child with school impairment may need consent-based communication with caregivers and school personnel; a client with chronic pain may need integrated behavioral and medical planning. Coordination should be limited to relevant information and consistent with confidentiality rules. Two cross-cutting principles deserve emphasis. First, the therapeutic relationship is itself an active ingredient.

Decades of process research show the alliance, goal consensus, and collaboration predict outcome across approaches, so an intervention answer that sacrifices the relationship to push a technique is usually wrong. A ruptured alliance is addressed directly before the protocol resumes. Second, the stepped-care principle favors the least intensive intervention likely to work, escalating only when response data warrant it; a low-risk, mild presentation rarely justifies the most intensive option in the answer set, and an acute, high-risk presentation rarely justifies a minimal one.

Matching also extends to readiness for change: an intervention that demands action from a client who is ambivalent or pre-contemplative is poorly timed, and motivational work may need to precede a change-focused protocol.

The best Part 2 intervention answer is neither passive nor impulsive: it takes the assessment data seriously, builds a formulation, explains and consents the plan, coordinates care where the system requires it, monitors outcomes, and changes course when the client is not improving. That deliberate, evidence-guided, client-centered loop is what makes intervention a professional skill rather than a list of treatment names.