Within subject and between subject designs have different advantages and disadvantages.

Question

Quizplus · Accepted Answer

Within subject designs allow for comparisons within the same individual, reducing variability and increasing statistical power, while between subject designs allow for comparisons between different individuals, potentially reducing confounds and allowing for the analysis of individual differences. However, within subject designs are more susceptible to order effects and demand characteristics, while between subject designs may require larger sample sizes to reduce individual differences.

Within Subject and Between Subject Designs Have Different Advantages and Disadvantages