To study accommodation to the loss of an eye, a sensory psychologist obtained 10 volunteers who agreed to wear an eye patch over one eye for 4 weeks. To test visual ability, the psychologist used a batting test: a pitching machine lobbed 50 pitches to each participant and the psychologist counted how many were hit. This test was conducted (a) Before the eye patch was worn, (b) Immediately after the eye patch was first put on, (c) 1 week into the study, (d) 2 weeks into the study, (e) 3 weeks into the study, (f) On the last day wearing the eye patch, and (g) 1 week later. What test should be used to see if batting ability changed over the course of the study?