Sample size (or number of clusters) by treatment arms
There are 24 treatment cells for the white respondents and 24 treatment cells for the African American respondents. We will recruit 10,000 participants total in each group. Across groups, the treatment cells will be the same size. We use the labels, defined above, to indicate treatment.
For example, (S-AMA, RC) + (Ta, RNC) indicates the AMA statement about race delivered by a racially concordant actor + the Ta version of the health videos delivered by a racially non-concordant physician.
Each participant group will be divided into treatments with the following sample sizes:
1. (S-AMA, RC) + (Ta, RC): 1,000
2. (S-AMA, RC) + (Tb, RC): 1,000
3. (S-AMA, RC) + (P, RC): 500
4. (S-AMA, RC) + (Ta, RNC): 1,000
5. (S-AMA, RC) + (Tb, RNC): 1,000
6. (S-AMA, RC) + (P, RNC): 500
7. (S-AMA, RNC) + (Ta, RC): 1,000
8. (S-AMA, RNC) + (Tb, RC): 1,000
9. (S-AMA, RNC) + (P, RC): 500
10. (S-AMA, RNC) + (Ta, RNC): 1,000
11. (S-AMA, RNC) + (Tb, RNC): 1,000
12. (S-AMA, RNC) + (P, RNC): 500
13. (S-DP, RC) + (Ta, RC): 1,000
14. (S-DP, RC) + (Tb, RC): 1,000
15. (S-DP, RC) + (P, RC): 500
16. (S-DP, RC) + (Ta, RNC): 1,000
17. (S-DP, RC) + (Tb, RNC): 1,000
18. (S-DP, RC) + (P, RNC): 500
19. (S-DP, RNC) + (Ta, RC): 1,000
20. (S-DP, RNC) + (Tb, RC): 1,000
21. (S-DP, RNC) + (P, RC): 500
22. (S-DP, RNC) + (Ta, RNC): 1,000
23. (S-DP, RNC) + (Tb, RNC): 1,000
24. (S-DP, RNC) + (P, RNC): 500