A Level Psychology OCR Practice Exam

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What is a significant limitation of the Sperry et al (1968) study related to its sample?

The sample was too large for meaningful analysis
The sample consisted of individuals from various backgrounds
The use of 11 participants reduced generalizability
The sample included individuals with intact brains

The correct answer is: The use of 11 participants reduced generalizability

The significant limitation of the Sperry et al. (1968) study concerning its sample is that the use of only 11 participants reduced generalizability. This small sample size limits the ability to apply the findings to a larger population. When research involves such a limited number of participants, there is a risk that the results may reflect atypical outcomes rather than broad, generalizable trends. In the context of neurological studies, especially those involving individuals with specific conditions such as split-brain patients, this limitation becomes particularly salient. Each participant's individual history and the extent of their brain injury may lead to varied results that don't accurately represent all individuals with similar conditions. Consequently, while the study provides valuable insights into brain function and lateralization, the small sample size restricts the robustness of its conclusions to a wider audience.