Appendix 2—table 1. Counterbalancing across treatments, with six different sequences of letters randomly assigned to N = 30.

A corresponded to risperidone, B to placebo and C to levodopa.

Volunteer	Sequence	Treatment order
1	5	B/A/C
2	4	A/C/B
3	5	B/A/C
4	6	C/B/A
5	2	B/C/A
6	2	B/C/A
7	2	B/C/A
8	6	C/B/A
9	1	A/B/C
10	5	B/A/C
11	3	C/A/B
12	5	B/A/C
13	3	C/A/B
14	4	A/C/B
15	1	A/B/C
16	1	A/B/C
17	2	B/C/A
18	5	B/A/C
19	1	A/B/C
20	3	C/A/B
21	4	A/C/B
22	6	C/B/A
23	4	A/C/B
24	6	C/B/A
25	6	C/B/A
26	3	C/A/B
27	1	A/B/C
28	4	A/C/B
29	2	B/C/A
30	3	C/A/B