Visual Inspection

What is the primary method used to analyze data and determine treatment effects in single-subject research?

Match each concept related to data analysis with its specific role or relationship to single-subject research designs.

A researcher conducts a single-subject study to evaluate a new reading intervention for a student. After graphing the student's performance, the researcher observes a clear and immediate increase in reading speed when the intervention is introduced. Even if the researcher does not perform formal statistical tests or average the data across multiple participants, they are correctly following the standards of single-subject research by judging the treatment's effect through visual inspection.

A researcher is evaluating a student's progress using a single-subject design. To correctly analyze the data and determine if the intervention was successful, arrange the following analytical steps in the correct logical sequence.

How are formal statistical methods typically utilized in the data analysis of single-subject research?

In single-subject research, visual inspection is a supplemental method used to confirm the results of formal statistical methods.

In single-subject research, the primary method used to evaluate the reliability and significance of a treatment effect by judging individual data patterns is _____.

A researcher is reviewing several study descriptions. Match each description to the data analysis principle from single-subject research it best illustrates.

A single-subject researcher graphs a participant's data and can clearly see a shift in performance after the intervention is introduced. The researcher then also runs a statistical test on the same data. Based on the analytical framework of single-subject research, the statistical test should be interpreted as a _____ to visual inspection—providing additional supporting evidence rather than serving as the primary basis for concluding that the treatment was effective.

A peer reviewer is evaluating whether a published single-subject study analyzed its data appropriately. Arrange the following evaluative criteria in the order they should logically be applied when judging the quality of the data analysis section.

Explain how data analysis in single-subject research typically differs from data analysis in group research. In your answer, identify the primary method used to evaluate treatment effects and describe the role of formal statistical analyses.

Based on the principles of single-subject data analysis, identify the errors in the clinician's approach. Explain what primary analytical method the clinician should use instead and how they should view the role of the statistical t-test.

A school psychologist graphs a student's daily focus time during a baseline phase and an intervention phase. The graph shows highly variable, overlapping data points between the two phases. However, a statistical test applied to the data indicates a statistically significant difference (p < .05) between phases. Applying the principles of single-subject data analysis, what conclusion should the psychologist draw about the treatment's effectiveness, and why?