A variety of research results suggest that visual images interfere with visual perception. In one study, Segal and Fusella (1970) had participants watch a screen, looking for brief presentations of a small blue arrow. On some trials, the participants were also asked to form a mental image (for example, imagine a volcano). The results for a sample of n = 6, show that participants made an average of MD = 4.3 more errors while forming images than while not forming images. The difference scores had SS = 63. Do the data indicate a significant difference between the two conditions? Use a two-tailed test with α = .05.