Example 3a: SCORING

This student has used the same group labels for rows and columns. These labels conflict with what is in the box labels. Because the box labels form a valid cross-classification, we may award points for animals.

1. Column groups
   • FIRST, are both groups levels of the same variable?
     • water and no water are levels of a variable.
   • SECOND, is there corroborating evidence?
     • Step 1: check property label.
     • water and no water are not levels of water (See mammals rule).
     • Box labels do not corroborate these groups.
     • Animals do not corroborate these groups. 2 points
2. Column property
   • Do both column groups fit the property?
     • water and no water are not levels of water 0 points
3. Row groups
   • FIRST, are both group levels of the same variable?
     • water and no water are levels of habitat. 2 points
4. Row property
   • water and no water are levels of habitat. 1 point
5. Box Labels
   • Do not correspond to outside row and column labels. 0 points
6. Animals
   • Does the animal fit the box?
   • We may award points for all 8 animals, based on the internal cross-classification. 8 points