A researcher hypothesizes that ADHD symptoms will exacerbate the distracting impact of a cell phone ringing during a lecture. She conducts a 2 (ring vs. no ring) × 2 (low ADHD symptoms vs. high ADHD symptoms) factorial with 100 participants, 25 in each cell.
1. Fill in the missing information in the ANOVA summary table. Look at Appendix C.6 to determine if the F meets criteria for statistical significance.

2. Compute the effect size (η2 partial) for each main effect and the interaction.

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Tests of Between-Subjects Effects Sum of Source Squares condition | 11.560 kB1-1 ADHD condition *ADHD Error Total df Mean Square Sig 1.960 | k82-1 = MSBs/ MS,- 1.440| ( 1)( 2) MSM5 BI x 81x B2 B1xB 114.000 C(n-1) 128.9601 N-1