A Researcher Plans to Conduct a Complete Repeated Measures Design

Multiple Choice

A researcher plans to conduct a complete repeated measures design in which the independent variable is manipulated using four conditions that vary the level of violence depicted in a photograph (none,low,medium,high) .There are 10 photographs in each of the four conditions.Each participant will rate each photo once and therefore make a total of 40 ratings.If the researcher wishes to have 80 ratings for each photo,how many participants should the researcher recruit?

A) 2
B) 10
C) 40
D) 80