A researcher is attempting to determine the effects of practice and gender on a timed task. Participants in the experiment are given a computerized search task. They search a computer screen of various characters and attempt to find a particular character on each trial.

When they find the designated character, they press a button to stop a timer. Their reaction time (in milliseconds) on each trial is recorded.

Participants practice for 1, 2, or 3 hours and are either female or male.

The ANOVA summary table appears next, along with the means for each condition and the number of participants in each condition.

a. Identify the factorial notation for the design.

b. Complete the ANOVA summary table.

c. Determine significance levels for any main or interaction effect(s).

d. Explain any significant main or interaction effect(s).

e. Calculate eta-squared for any significant effects.

f. Draw a graph representing the data.

Transcribed Image Text:

Source Factor A (gender) Factor B (practice) AxB Two-Way ANOVA Summary Table df SS 684,264 989,504 489,104 2,967,768 Error Total 5,130,640 Condition Female/1 hour Mean 1,778.125 = 8 Female/2 hours Female/3 hours 1,182.75 1,512.375 8 8 Male/1 hour 1,763.375 8 Male/2 hours 1,764.25 8 Male/3 hours 1,662 8 MS F