Why might researchers choose a two-way design over two separate studies?

Researchers often opt for a two-way design because it allows them to explore the effects of two different independent variables simultaneously within the same study. This approach can yield more detailed results as interactions between the variables can be examined directly. By utilizing fewer participants in a two-way design, researchers can maximize the amount of data obtained and increase statistical power, all while avoiding the need for additional separate studies. This efficiency not only helps in achieving comprehensive insights but also enhances the study's overall effectiveness, making it a preferred choice in behavioral research.