A Psychologist Wishes to Have Participants Rate Two Different Sets

Essay

A psychologist wishes to have participants rate two different sets of inkblots (labeled A and B) for their "emotionality." The inkblots differ in their use of color. Ten inkblots in set A are created in shades of gray; ten inkblots in set B use shades of red, blue, and yellow. The psychologist hypothesizes that color will influence participants' ratings of emotionality. Each participant will rate all twenty inkblots.
-If the psychologist would like to have 50 ratings for each inkblot,how many participants will the psychologist need to recruit for the experiment?