Which statement about a single-subject, intensive study is true?

Which statement about a single-subject, intensive study is true?

• A. It involves studying many participants to generalize findings
• B. It collects in-depth data from a single individual or a small group
• C. It relies solely on surveys
• D. It always establishes causation

Answer: (B)

Single-subject, intensive studies focus on depth over breadth. They gather rich, detailed data from one person or a small group across multiple time points, often tracing how that individual responds to a particular intervention or condition. This approach emphasizes observing patterns, changes, and stability within the same subject, rather than trying to generalize findings to a larger population. Because the emphasis is on the individual(s), these designs contrast with studies that involve many participants to draw population-level conclusions. Data collection is not limited to surveys; it can include continuous observations, behavioral measures, interviews, and other methods to build a comprehensive picture of the subject's experience. Causation is not guaranteed in every single-subject study. While a well-controlled single-subject design can provide strong evidence of a causal effect within that individual, it requires careful design and replication, and it does not automatically establish causation in all cases.

Single-subject, intensive studies focus on depth over breadth. They gather rich, detailed data from one person or a small group across multiple time points, often tracing how that individual responds to a particular intervention or condition. This approach emphasizes observing patterns, changes, and stability within the same subject, rather than trying to generalize findings to a larger population.

Because the emphasis is on the individual(s), these designs contrast with studies that involve many participants to draw population-level conclusions. Data collection is not limited to surveys; it can include continuous observations, behavioral measures, interviews, and other methods to build a comprehensive picture of the subject's experience.

Causation is not guaranteed in every single-subject study. While a well-controlled single-subject design can provide strong evidence of a causal effect within that individual, it requires careful design and replication, and it does not automatically establish causation in all cases.