Dr. Stallworth is developing a new research study and needs to determine the number of participants necessary to achieve adequate power. Dr. Stallworth currently has theorized four experimental conditions in this multigroup design. What is the minimum number of participants Dr. Stallworth would need to yield adequate power?

Question

Quizplus · Accepted Answer

The minimum number of participants necessary to achieve adequate power depends on several factors, including the effect size, alpha level, desired power, and number of experimental conditions. Without additional information, it is impossible to determine the exact number of participants needed. However, as a general rule of thumb, a sample size of at least 30 participants per condition is recommended to yield adequate power for multigroup designs. Therefore, with four conditions, Dr. Stallworth would need a minimum of 120 participants (30 per condition) to achieve adequate power. Choice C is the only option that meets this minimum requirement.

Dr Stallworth Is Developing a New Research Study and Needs