What was one limitation of Brendgan et al.'s study regarding the sample?

• A. It was conducted with a small sample size.
• B. All participants were male.
• C. It used recreational drug abusers only.
• D. Participants were not twins.

Answer: (A)

The limitation regarding the sample size in Brendgan et al.'s study indicates that a small sample size can affect the generalizability and reliability of the findings. Smaller samples may not adequately represent the larger population, leading to potential biases or skewed results. This limitation can make it difficult to establish strong conclusions about relationships or patterns in the data, as there may be a lack of statistical power to detect significant effects. In the context of psychological studies, a small sample size can also restrict the ability to explore variations within the sample and may raise questions about the representativeness of the participants involved in the research.