Spontaneous Remission
Spontaneous remission is the natural tendency for many medical conditions and psychological problems to gradually improve over time without any formal treatment or intervention. This phenomenon acts as a significant confounding variable in studies that lack a control group; researchers evaluating a treatment using a simple pretest-posttest design may falsely attribute a patient's recovery to their specific intervention, when in reality, the condition would have naturally improved on its own.
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Research Methods in Psychology - 4th American Edition @ KPU
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History as a Threat to Internal Validity
Maturation as a Threat to Internal Validity
Testing as a Threat to Internal Validity
Instrumentation as a Threat to Internal Validity
Spontaneous Remission
Confounding Variable
What is the primary focus of internal validity in an experiment?
In a study comparing two different teaching methods, if the group receiving Method A also happens to be more naturally motivated than the group receiving Method B, the study would be described as having high internal validity.
A researcher is investigating whether a new 'Mindfulness App' reduces stress. Match each of the researcher's design decisions to the specific way it protects the study's internal validity.
A researcher finds that a 'Brain Training' app improves memory scores. However, the app group was paid $50, while the control group was paid $0. Arrange the following steps to reflect a logical analysis of the study's internal validity.
A researcher reports that a new meditation program reduces anxiety by more than a control group. However, an external reviewer discovers that the meditation group also attended weekly support meetings that the control group did not. The reviewer concludes that the study's findings are compromised because this lack of control over extraneous variables directly undermines the study's ______ validity.
The degree to which an experiment ensures that any systematic changes in the outcome () are wholly due to the manipulation of the influence factor () is known as ______ validity.
In psychological research, internal validity is considered 'high' only when the researcher can confidently conclude that:
A researcher conducts an experiment to test if a new memory technique (influence ) improves test scores (outcome ). If the experiment is designed such that any systematic changes in test scores are wholly due to the new memory technique, the study would be applied as having high internal validity.
Match each component of an experimental design with the appropriate description to analyze how it relates to the study's internal validity.
Arrange the following steps in a logical sequence to evaluate whether a study's claims of causality are supported by its internal validity.
Interrupted Time-Series Design
Control Group in Pretest-Posttest Designs
History as a Threat to Internal Validity
Maturation as a Threat to Internal Validity
Testing as a Threat to Internal Validity
Instrumentation as a Threat to Internal Validity
Regression to the Mean as a Threat to Internal Validity
Spontaneous Remission
Example of a One-Group Pretest-Posttest Design
Why is it difficult to conclude with certainty that a treatment was effective when using a one-group pretest-posttest design?
A researcher is using a one-group pretest-posttest design to study the effect of a new stress-reduction workshop on college students. Match each component of the study to its specific role in this research design.
A health psychologist wants to evaluate the impact of a weekend nature retreat on stress levels using a one-group pretest-posttest design. Arrange the steps of this study in the correct chronological order.
A researcher evaluates a new study-skills workshop using a one-group pretest-posttest design and observes a significant increase in students' grade point averages at the end of the semester. The researcher can definitively conclude that the workshop caused the increase because the pretest measurement successfully accounts for each participant's individual academic history.
Which of the following describes the basic procedure used in a one-group pretest-posttest design?
A researcher evaluates a new social-anxiety intervention using a one-group pretest-posttest design and finds that participants' anxiety levels are lower at the posttest than they were at the start. When appraising the scientific merit of the claim that 'the intervention caused the change,' a peer reviewer would note that the lack of a comparison group makes it impossible to rule out threats like maturation or history. Consequently, in terms of research design standards, this study is evaluated as having critically low _____ validity.
When using a one-group pretest-posttest design to evaluate a new mindfulness intervention, the researcher uses the pretest to establish a(n) _____ for participants' stress levels before the intervention occurs.
A researcher evaluates a new math tutoring software using a one-group pretest-posttest design. To control for potential order effects, the researcher can counterbalance the study by having half of the participants take the posttest exam before they use the tutoring software.
Analyze the structural differences between a within-subjects experiment and a one-group pretest-posttest design. Match each design characteristic to the research design or feature it describes.
An educational psychologist wants to evaluate the effectiveness of a new reading intervention using a one-group pretest-posttest design. Arrange the steps of the research process and the subsequent evaluation of its findings in the correct chronological and logical order.
Learn After
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.