A maze learning study with a 2 (type of maze: alley maze or elevated maze) × 2 (type of rat: wild or bred in the lab) factorial has these results (DV = number of trials until performance is perfect):

Alley maze / wild rats = 12 trials Alley maze / tame rats = 20 trials Elevated maze / wild rats = 20 trials Elevated maze / tame rats = 12 trials Summarize the results in terms of main effects and interactions.