Notes9 - ANOVA With More Than One IV 2-way ANOVA So far,...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
1 ANOVA With More Than One IV 2-way ANOVA • So far, 1-Way ANOVA, but can have 2 or more IVs. IVs aka Factors . • Example: Study aids for exam – IV 1: workbook or not – IV 2: 1 cup of coffee or not Workbook only Neither (Control) No Both Caffeine only Yes Yes No Caffeine (Factor B) Workbook (Factor A) Main Effects 80 82.5 77.5 Col Means 77.5 Book =80 SD=5 Control =75 SD=5 No 82.5 Both =85 SD=5 Caff =80 SD=5 Yes Yes No Caffeine (Factor B) Row Means Workbook (Factor A) N=30 per cell X X X X
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
2 Main Effects and Interactions • Main effects seen by row and column means; Slopes and breaks. • Interactions seen by lack of parallel lines. • Interactions are a main reason to use multiple IVs Workbook (Factor A) 86 84 82 80 78 76 74 Mean RM Test No Yes Without Caffeine With Caffeine Factor B Single Main Effect for B 2.0 1.0 Factor A 25 20 15 10 5 0 Mean Response Single Main Effect B=1 B=2 A 1 2 B 1 2 10 10 20 20 (Coffee only) Single Main Effect for A 2.0 1.0 Factor A 20 16 12 8 4 0 Single Main Effect B=1 B=2 A 1 2 B 1 2 10 20 10 20 (Workbook only)
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 6

Notes9 - ANOVA With More Than One IV 2-way ANOVA So far,...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online