Questions Refer to Table 12-1 Below Boys
Girls
-Consult Table 12-1

Questions refer to Table 12-1 below. In this study, a researcher is interested in determining if the type of reinforcement affects the number of books read over the summer. A sample of 12-year-old children (half of them boys and half of them girls) is randomly assigned to receive either candy, money, toys, or nothing for every book read over the summer. The mean number of books read over the summer for each group is listed within each cell.
Table 12-1:
Type of Reinforcement
Candy Money Toys None
$$\begin{array} { | l | l | l | l | } \hline \boldsymbol { M } = 10 & \boldsymbol { M } = 10 & \boldsymbol { M } = 10 & \boldsymbol { M } = 2 \\\hline \boldsymbol { M } = 10 & \boldsymbol { M } = 10 & \boldsymbol { M } = 10 & \boldsymbol { M } = 2 \\\hline\end{array}$$ Boys
Girls
-Consult Table 12-1. Which of the following statements best describes the results?

A) There appears to be a main effect for gender, a main effect for type of reinforcement, and no interaction.
B) There appears to be a main effect for gender, a main effect for type of reinforcement, and an interaction.
C) There appears to be a main effect for gender, no main effect for type of reinforcement, and no interaction.
D) There appears to be no main effect for gender, a main effect for type of reinforcement, and no interaction.