The principles of classical and operant conditioning, which were originally discovered using single-subject research methods, have been shown to generalize across a wide variety of species and real-world situations, thereby providing strong historical evidence for the external validity of single-subject designs.

The fundamental principles of classical and operant conditioning provide strong historical evidence for the external validity of single-subject designs. Although these principles were primarily discovered using single-subject methods, they have successfully generalized across a massive variety of species and real-world situations.

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Single-subject researchers defend their methods by noting that the strong and consistent effects they typically focus on are likely to generalize to others in the broader population, even when these effects are initially observed in very small samples.

Generalizability of Strong Effects in Single-Subject Research

https://kpu.pressbooks.pub/psychmethods4e/

KPU Research Methods in Psychology - 4th American Edition

Generalization of Conditioning Principles

On what basis do single-subject researchers typically argue that their findings can generalize to the broader population, despite using very small samples?

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