Table 2.

Comparison of all students to consenting students on final course grades^a

Year	All students	Students consenting for written work	p	Students consenting for audio recording	p
1	82 (1.1)	NA	NA	85 (1.0)	0.100
2	86 (0.7)	87 (0.7)	0.211	89 (1.0)	0.044

^aNumbers in parenthesis represent SE. Student’s t tests were used to generate p values.