1. Ordinal and Disordinal
With ANOVA, we can establish the nature of the interaction between two treatments
No interaction
Ordinal Interaction ~ effects of treatment are not equal across all levels of another treatment...but magnitude is in the same direction
Show example from bookÖon overhead.
No interaction: Prefer Balls/Cubes/StarsÖin a specific order. Prefer Green/Blue/RedÖin that order as well. Lines are roughly parallel.
Ordinal: Lines are not parallelÖand do not cross. Big differences for red, small for green. Differences by color vary by shapeÖbt relative order stays the same.
Disordinal: Differences in color vary by shape, not only in terms of magnitude but also direction. Lines are not parallel and cross one another. Balls do better when color is red or blue, but worse when the color is green.

2. Ordinal and Disordinal
With ANOVA, we can establish the nature of the interaction between two treatments
Disordinal Interaction ~ Effects of one treatment are positive for some levels and negative for other levels of the other treatment
Show example from bookÖon overhead.
No interaction: Prefer Balls/Cubes/StarsÖin a specific order. Prefer Green/Blue/RedÖin that order as well. Lines are roughly parallel.
Ordinal: Lines are not parallelÖand do not cross. Big differences for red, small for green. Differences by color vary by shapeÖbt relative order stays the same.
Disordinal: Differences in color vary by shape, not only in terms of magnitude but also direction. Lines are not parallel and cross one another. Balls do better when color is red or blue, but worse when the color is green.

3. Gráfico das médias. Interação Ordinal e Não Ordinal

4. Interaction effects and type: none
Permissible to interpret main effects?  Yes

5. Interaction effects and type: slight tendency – ordinal interaction
Permissible to interpret main effects?  Yes

6. Interaction effects and type: yes, disordinal interaction
Permissible to interpret main effects?  No

7. Interaction effects and type: yes, disordinal interaction
Permissible to interpret main effects?  No

8. Interaction effects and type: yes, ordinal interaction
Permissible to interpret main effects?  Yes