Effect size and meaning? Researcher is attempting to determine the effects of practice and gender on a timed task. Participants are given a computerized search task. When they find the designated character, they press a button to stop timer. Their reaction time in seconds is recorded for each trial. Subjects practice for 2, 4, 6 hours and are either male or female. Reaction time data for 30 subjects appear here. 2 hours - women= 12, 13, 12, 11, 11 - men=11, 12, 13, 12, 11 4 hours - women=10, 10, 10, 8, 7 -- men=8, 8, 10, 10, 9 6 hours - women=7, 5, 7, 6, 7 -- men=5, 6, 8, 6, 8 Source: Gender: df=?, SS=0.027, MS=?, F=? Source: Practice: df=?, SS=140.60, MS=?, F=? Source: Gender x Practice: df=?, SS=0.073, MS=?, F=? Error: 28.00; total=168.70