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External Validity Concerns in Single-Subject Research
In single-subject research, external validity is frequently questioned due to the reliance on very small sample sizes. Critics point out the difficulty in knowing whether treatment effects observed in just a few participants will successfully generalize to others in the broader population. For example, if a single-subject study demonstrates that a treatment reduces self-injury in two specific children with intellectual disabilities, advocates of group research might question how researchers can be confident that the identical treatment will be effective for other children with intellectual delays.
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Research Methods in Psychology - 4th American Edition @ KPU
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External Validity Concerns in Single-Subject Research
Generalizing to Individuals in Group Research
Generalizing Across Situations
Mundane Realism
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Prioritizing Validities
External Validity of Correlational Research
Situational Generalization in Group Research
Which of the following best defines external validity in psychological research?
If a researcher finds that a memory-enhancing technique works for college students in a laboratory setting but fails to work for elderly adults in their own homes, the study is considered to have high external validity.
Match each research scenario with the statement that best describes its impact on the ability to generalize the study's results to other people or situations.
A researcher is evaluating how well results from three different psychological studies can be generalized to the broader population and to real-world settings. Analyze the design characteristics of each study and arrange them in order from the least likely to have high external validity to the most likely to have high external validity.
Imagine you are creating a research protocol to test whether a new memory-enhancing strategy is effective for the general public. To design a study with the highest possible 'external validity', which of the following plans should you construct?
Complementary Nature of Single-Subject and Group Research
Individual Generalization in Group Research
Requirements for Generalization
Suppose you are a peer reviewer for a psychological journal assessing a study that demonstrates a significant effect of a new therapy, but you notice the study was conducted exclusively on a very specific, small group of students in a highly controlled laboratory. To critique the study's lack of generalizability to the broader population and real-world clinical settings, your evaluation would focus on a deficiency in _____ validity.
The ability to generalize the results of a study beyond the specific people and situations that were actually investigated is known as _____ validity.
A researcher wants to study how social pressure affects eco-friendly behavior. Instead of using a sterile laboratory, they conduct a field experiment in an actual hotel, observing whether guests reuse towels. According to the definition of external validity, this study is high in external validity because it allows findings to be generalized to real-world situations beyond a specific laboratory setting.
Match each research scenario or design characteristic with its corresponding impact on external validity, based on how environmental control and setting affect generalization.
Evaluate the following three research designs based on their expected level of external validity. Arrange them in order from the design with the HIGHEST external validity (Order 1) to the design with the LOWEST external validity (Order 3).
Learn After
Addressing External Validity in Single-Subject Research
Example of External Validity Concerns in Single-Subject Research
Generalizability of Strong Effects in Single-Subject Research
Why is the external validity of single-subject research frequently questioned by critics?
If a single-subject study demonstrates that a specific behavioral intervention successfully reduces self-injury in two children, a critic questioning the study's external validity would argue that these results may not necessarily apply to other children in the broader population.
A researcher conducts a single-subject study with three children to evaluate a new social-skills training program. Match each element of this research scenario to its role in a critique of the study's external validity.
A researcher finds that a new intervention successfully reduces social anxiety in two college students. Arrange the following logical steps to represent the process of analyzing why these findings might not apply to the broader population.
Generalization of Single-Subject Self-Injury Treatment
Replication for External Validity in Single-Subject Research
An educational psychologist conducts a single-subject study and demonstrates that a specialized visual-schedule intervention successfully reduces transition-related anxiety in two specific children with developmental delays. If a critic questions the external validity of these findings, what is the core of their concern?
A peer reviewer evaluates a single-subject study involving two participants and concludes that the findings should not be used to inform national healthcare guidelines. This judgment is based on the study's inherent deficiency in _____ validity.
Critics of single-subject research frequently question its external validity because of the difficulty in knowing whether the observed treatment effects will successfully _____ to other individuals in the broader population.
A clinical psychologist publishes a single-subject study showing that a new behavioral intervention successfully reduces self-injury in two children with intellectual disabilities. If they claim this study proves the treatment will be effective for all children with intellectual delays, this claim is invalid because it ignores the inherent external validity concerns caused by the small sample size of single-subject designs.
A researcher publishes a single-subject study examining a treatment for self-injury. Match the elements from the study's critique to their correct descriptions or roles in evaluating external validity.
A researcher claims a self-injury treatment is ready for general use based on a single-subject study of two children. Order the steps an evaluator should take to assess the external validity of this claim, from the initial observation to the final evaluation.