Figure 1.

Effect sizes (Cohen's d) of studies on EYT. Analysed variables of the respective studies were indicated. Effect sizes were classified as small (0.20–0.49), medium (0.50–0.79), and large (≥ 0.80).

Büssing et al. BMC Complementary and Alternative Medicine 2008 8:8   doi:10.1186/1472-6882-8-8
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