Refer to the Human Factors (May 2014) study of improving driving performance while fatigued, Exercise 9.31. Recall that 40 college students were assigned to drive a long distance in the simulator while performing a verbal task. Ten student-drivers performed the verbal task continuously (continuous verbal condition); 10 performed the task only at the end of the drive (late verbal condition); 10 did not perform the task at all (no verbal condition); and 10 listened to a program on the car radio (radio show condition). The dependent variable measured was the percentage of billboards recalled by each student-driver.

These percentages are provided below. Use the information in the SPSS printout on the next page to determine if there are differences in the distributions of recall percentages for student-drivers in the four groups. Test using α = .01.

Transcribed Image Text:

Continuous Late No Radio Verbal Verbal Verbal Show 37 45 8985的4寸%导