RCT Phases

CH.17 - Treatment of Psychological Disorders

RCT Phases

Preparation Phase
  • Define disorder: A clear definition is essential to understand the condition being treated.

  • Train diagnosticians: Ensure that those assessing the disorders are well-equipped with tools and knowledge to identify them accurately.

  • Develop treatment manual: A comprehensive guide outlining treatment protocols to standardize interventions.

  • Train therapists: Provide therapists with the necessary skills and techniques to administer treatment effectively.

  • Select outcome measures: Determine the metrics by which treatment efficacy will be assessed.

Screening Phase
  • Pick qualified clients: Identify participants who meet the criteria for the study and are suitable for the specific treatments being tested.

  • Administer baseline measures: Collect initial data regarding the severity of symptoms and other relevant metrics before treatment begins.

Treatment Phase
  • Randomize to therapy vs control: Randomly assign clients to either the treatment group or a control group to ensure unbiased results.

  • Monitor therapist competence/adherence: Regularly check that therapists are implementing the treatment methods correctly and effectively.

Outcome Assessment
  • Re-measure symptoms: Reassess clients to check for changes in symptoms after the intervention.

  • Evaluate relationship quality: Assess the quality of the therapeutic alliance and its impact on treatment outcomes.

  • Assess client attitudes and emotions: Evaluate how clients feel about therapy and their emotional responses during the treatment process.

Follow-Up Phase
  • Reevaluate functioning: After treatment, reassess clients to determine long-term effectiveness and functioning.

  • Collect relapse data: Gather information on any recurrence of the disorder after treatment ends.

Meta-Analysis

  • Definition: A statistical method combining data from multiple studies to derive overall conclusions about treatment effectiveness.

  • Effect size: The percentage of clients who show improvement beyond the average participant in a control group.

Key Studies
Smith & Glass (1977)
  • Analyzed 375 studies involving 25,000 treated individuals compared to 25,000 controls.

  • Findings: Treatment clients fared better than 75% of those who did not receive treatment.

Grissom (1996)
  • Reported a 70% improvement rate in treated individuals compared to no-treatment groups.

Are Therapies Equally Effective?

Dodo Bird Verdict
  • Concept: The hypothesis that all therapies yield similar results and are equally effective, encapsulated in the saying that "all must have prizes."

  • Observation: Most therapies show similar average outcomes, however…

Debate on Effectiveness
  • Complex Reality:

    • While the Dodo Bird verdict might hold true in some cases, it oversimplifies the reality of treatment outcomes.

    • Differing effectiveness is noted; specific therapies may work better for certain disorders compared to others.

Survey Research: The Consumer Reports Study

Participant Feedback
  • Prior therapy experiences:

    • 42% reported feeling helped "a lot."

    • 44% felt helped "somewhat."

    • Overall, 89% of participants expressed satisfaction with their therapy experience.

Research Methodology
  • Strengths:

    • A large sample size from real-world settings enhances the validity of findings.

  • Weaknesses:

    • Lack of control groups limits the research.

    • Self-selection bias may skew results, as those who choose to participate might differ systematically from those who do not.

    • Outcomes were self-reported, potentially affecting reliability due to subjective biases.

Factors Affecting Treatment Outcome

Client Variables
  • Openness: Acknowledges the client's willingness to engage in therapy and pursue personal change.

  • Self-relatedness: The ability of clients to understand and articulate their own thoughts and emotions, leveraging insight for improvement beyond therapy sessions.

  • Nature of the problem:

    • Specific phobias tend to respond better to behavioral exposure techniques.

    • Existential problems usually improve with humanistic or psychodynamic therapy approaches.

Therapist Variables
  • Important traits:

    • Empathy: The capacity to understand and share the feelings of another.

    • Unconditional acceptance: Valuing clients without conditions.

    • Genuineness: Being authentic in the therapeutic relationship.

    • Strong therapeutic alliance: A positive and trusting relationship fosters better outcomes.

  • Negative Effects:

    • A poor therapeutic alliance can lead to a deterioration effect, whereby negative feelings such as hostility or rejection can worsen the client's condition.

Technique Variables
  • Critical components:

    • Correct selection of methods tailored to clients' needs is crucial for successful treatment.

    • Techniques should be adjusted to fit the unique requirements and contexts of clients.

    • Consideration of timing and pacing throughout the therapeutic process.

Common Factors Across Therapies

Shared Elements That Promote Improvement
  • Trust and faith in the therapist: Essential for establishing the therapeutic alliance.

  • Plausible explanation of problems: Clients must understand their issues logically to facilitate change.

  • New perspective on self: Therapy should help clients view themselves in a different, more constructive light.

  • Safe environment for expression: A supportive context for clients to express their emotions freely is vital.

  • Practice of new behaviors: Allowing clients to try out new approaches encourages learning and adaptation.

  • Hope, optimism, self-efficacy: Fostering a belief in the ability to change and improve enhances treatment effectiveness.