Table 4.

Final 10-Item EXPECT Questionnaire: Reliability and Validity Statistics

	Community sample, n = 163	Clinical trials, n = 244
Cronbach's alpha	0.96	0.96
Test–retest reliability, ICC (95% CI)	0.75 (0.63–0.84)
Floor effect (score of 0), n (%)	2 (1.2)	0
Ceiling effect (score of 10), n (%)	3 (1.8)	7 (2.9)
Pearson correlations of the Expectations Questionnaire with other expectations measures
Credibility/Expectancy Questionnaire
Treatment credibility subscale	0.54
Treatment expectations subscale	0.65
Total score	0.65
Acupuncture Expectancy Scale	0.54
Treatment helpfulness rating	0.60

ICC, intraclass correlation.