The financial rewards offered in the Lacey et al. (2011) Roadside Survey varied with type of participation: an oral fluid sample resulted in a $10 incentive, a 14-item questionnaire resulted in a $5 incentive, and a blood sample resulted in a $50 incentive (323–324). Which of the Belmont Report principles is most relevant for this policy?
a. justice
b. beneficence
c. respect for persons
d. achieveing valid results
e. measurement reliability
