Figure: a Researcher Examined Whether Interrogators Who Expect a Suspect to to Be

Multiple Choice

Figure:
A researcher examined whether interrogators who expect a suspect to be guilty,rather than innocent,use more persuasive interrogation techniques.The researcher created a laboratory situation in which students (the "suspects") were randomly assigned to actually commit a crime or not commit a crime by following a set of instructions given to them.Student interrogators then interviewed a suspect;they were randomly assigned to conditions that led them to believe the suspect was guilty or innocent of the crime.Observers rated the effort used by interrogators to obtain a confession using a 1-10 rating scale (higher scores indicate greater effort) .
Suppose the researcher observed the following means for each group:
-The means used to describe the main effect of Interrogator Expectation are

A) 0.0 and 6.0.
B) 9.0 and 6.0.
C) 6.0 and 12.0.
D) 6.0 and 6.0.