Table 1 suggests that, taken as a whole, the treatment group did benefit somewhat from
the extensive reading treatment that lasted five weeks, with a differential gain of six more
correctly answered questions than the comparison group, for a differential gain of 4%
between the overall test scores. With only seven participants involved in this study, a
statistical analysis would not be practical. However, the small number of participants
yields the advantage of being able to observe and consider each individual participant’s
personal score in isolation from the others. Considering the scores of each participant
individually offers more detailed information about the success of the extensive reading
treatment for this particular study. Table 2 presents the pretest and posttest scores for
each member of the comparison group individually, while Table 3 presents the pretest
and posttest scores for each member of the extensive reading treatment group
individually.