A follow-up question, if I used an RCT research design to examine the effectiveness of mindfulness intervention for adults with anxiety, is there any way that I can calculate how many participants I should recruit? Thank you.

Welcome.

Wonderful. Such a big help!

Yes, there are ways to calculate the sample size needed for your RCT to examine the effectiveness of a mindfulness intervention for adults with anxiety. The sample size calculation depends on several factors, including the desired statistical power, significance level, expected effect size, and anticipated dropout rate.

Power analysis techniques, such as using software or online calculators, such as G*Power, can help determine the appropriate sample size. These calculations consider the specific statistical tests you plan to use, the effect size you expect to detect, and the desired level of statistical power (typically 80% or higher) to detect a significant effect, given the chosen significance level (often 0.05).