Figure 2

Comparison of the frequency of different categories of psychophysical responses between acupuncture and tactile stimulation control. When thresholded at a score of 3, the pooled data (N = 45) from the three acupoints showed a deqi frequency of 71% for acupuncture compared with 24% for tactile stimulation control (p < 0.0001). Standard error bars are based on a 95% Confidence Interval. Fisher's exact test. **p < 0.01, ****p < 0.0001. For more details on data refer to Table 1.