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Posternak and Miller's 2001 Spontaneous Remission Study
In a 2001 meta-analysis of depression treatments, researchers Michael Posternak and Ivan Miller highlighted the powerful effect of spontaneous remission. They discovered that participants assigned to wait-list control conditions—who had not yet received any formal therapy—still showed an average improvement of to in their depression symptoms. This finding underscores the necessity of control groups to isolate true treatment effects from natural recovery.
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Research Methods in Psychology - 4th American Edition @ KPU
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Posternak and Miller's 2001 Spontaneous Remission Study
Control Group in Pretest-Posttest Designs
Wait-List Control Condition
Eysenck's 1952 Psychotherapy Effectiveness Study
Example of Spontaneous Remission
In psychological research, what does the term 'spontaneous remission' refer to?
Arrange the following stages to demonstrate how spontaneous remission can act as a confounding variable in a study that tracks only one group of participants.
A researcher finds that a group of patients with mild depression show significant improvement after 10 weeks of 'nature walking' therapy. If the researcher concludes the therapy was effective based on a study that lacked a control group, they are failing to account for the possibility of spontaneous remission.
A psychologist is evaluating a new therapy for anxiety and must account for spontaneous remission in their analysis. Match each experimental component to the logical role it plays in distinguishing the therapy's effect from natural recovery.
Spontaneous remission refers to the natural tendency for many medical and psychological conditions to improve over time without any formal treatment or intervention.
When evaluating a treatment using a one-group pretest-posttest design, how does spontaneous remission specifically threaten the study's internal validity?
When evaluating the results of a study that lacks a comparison group, a researcher who attributes a patient's improvement solely to a specific therapy may be making a flawed judgment by failing to rule out _____, which is the natural tendency for conditions to improve over time without any intervention.
A clinical trial evaluates a new therapy for depression using a one-group pretest-posttest design. Match each scenario component to the correct psychological research concept it represents.
When analyzing the internal validity of a clinical study that lacks a control group, a researcher realizes that participants' symptoms would have naturally improved on their own over time. In psychological research, this natural improvement without formal treatment is called _____.
A researcher claims a new mindfulness app reduces anxiety because a group of users reported lower anxiety after 4 weeks. Evaluate the validity of this claim by ordering the steps required to determine if spontaneous remission is a confound.
Learn After
Posternak and Miller's (2001) findings showed that depressed participants on a wait-list for treatment improved by an average of 10% to 15% without formal therapy. What is the primary reason this finding is significant for the design of psychological research?
In clinical research on depression, researchers must distinguish specific treatment effects from natural recovery. Based on the findings of Posternak and Miller (2001), match each study scenario with the conclusion that correctly applies their 10% to 15% improvement threshold.
A researcher finds that a new counseling technique leads to a 30% reduction in depression symptoms. Arrange the logical steps required to analyze this result using the findings of Posternak and Miller (2001) to isolate the specific benefit of the technique.
Based on the findings of Posternak and Miller (2001), a researcher can validly conclude that a new therapy is effective if it produces a reduction in depression symptoms in a study that lacks a control group.
In Posternak and Miller's (2001) meta-analysis of depression treatments, which specific group of participants showed an average improvement of to in their symptoms despite not receiving formal therapy?
Posternak and Miller's (2001) study showing that wait-list control participants improved by to without therapy demonstrates that simply observing symptom reduction in a treated group is not sufficient to prove a therapy is effective.
In Posternak and Miller's 2001 meta-analysis of depression treatments, participants in wait-list control conditions who had not yet received any formal therapy still showed an average improvement of _____ to 15% in their depression symptoms.