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. Author manuscript; available in PMC: 2012 Sep 1.
Published in final edited form as: Med Decis Making. 2011 Mar 14;31(5):730–741. doi: 10.1177/0272989X11398666

Table 2.

Item Descriptive Statistics for Experimental Item Pool

Response frequencies
Item M SD Mdn 1
Strongly
Disagree
2

Disagree
3
Somewhat
Disagree
4
Somewhat
Agree
5

Agree
6
Strongly
Agree
1. The decision about the protocol was mine. 4.9 1.1 5.0 4 7 8 38 84 78
2. I was powerless in the face of this decision.* 4.7 1.6 5.0 16 14 18 17 58 96
3. Someone took this decision away from me.* 5.5 0.8 6.0 2 0 7 9 52 149
4. I was actively involved in this decision. 5.2 1.0 6.0 4 2 5 24 74 110
5. I made this decision. 5.0 1.2 5.0 4 7 12 30 71 95
6. The decision about the protocol was pressured by others.* 5.2 1.2 6.0 4 4 18 14 68 111
7. It didn't matter what I decided.* 5.2 1.2 6.0 7 4 10 12 68 118
8. I was not free to decide what I wanted.* 5.3 1.1 6.0 5 7 5 10 67 125
9. The decision was made by another person.* 5.0 1.3 5.0 6 10 19 9 78 96
10. I was helpless in the face of this decision.* 4.9 1.4 5.0 6 16 17 12 71 97
11. I was the one to choose. 4.8 1.3 5.0 6 14 13 35 78 73
12. The decision about the protocol was my choice. 4.8 1.2 5.0 8 8 8 44 78 73
13. I was passive in the face of this decision.* 4.7 1.4 5.0 5 24 14 22 77 77
14. I had an influence on the decision about the protocol. 4.2 1.7 5.0 21 33 18 23 67 57
15. The decision about the protocol was inappropriately influenced by others.* 5.4 0.9 6.0 2 2 7 7 85 116
16. I was not in control of this decision.* 5.0 1.3 5.0 8 10 13 10 71 107
17. I had no role in making the decision about the protocol.* 5.2 1.2 6.0 6 6 10 14 64 119
18. Others made this decision against my wishes.* 5.6 0.7 6.0 2 1 0 5 54 157
19. I was not the one to choose.* 5.2 1.2 6.0 6 9 11 6 74 113
20. Others were in control of this decision.* 4.9 1.4 5.0 5 15 22 10 64 103
21. I was able to express my point of view about the decision. 5.2 0.9 5.0 3 3 3 18 94 98
22. I was free to decide what I wanted. 5.1 1.1 5.0 4 6 10 13 90 96
23. The decision about the protocol was manipulated by others.* 5.3 0.9 6.0 0 6 6 13 79 115
24. The decision was up to me. 4.9 1.2 5.0 5 7 12 30 84 81
25. The decision was beyond my control.* 4.8 1.4 5.0 7 14 18 15 79 86
26. I was in control of this decision. 4.8 1.2 5.0 3 14 10 38 78 76
27. The decision was out of my hands.* 5.0 1.3 5.0 5 13 12 12 80 97
28. I chose whether or not to agree to the protocol. 5.2 1.1 5.0 3 6 8 19 85 98
*

Item was reverse-scored prior to calculation of descriptive statistics and frequencies.