Figure 2.

A decision tree to identify subjects who answered “Strongly disagree” for the item “The work of a dental hygienist is worth doing” (a), “I like working as a dental hygienist” (b), and “The work of a dental hygienist suits me” (c). For the items “The work of a dental hygienist is worth doing” and “I like working as a dental hygienist,” salary was the only determinant.