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. Author manuscript; available in PMC: 2020 Nov 1.
Published in final edited form as: Alcohol Clin Exp Res. 2019 Sep 30;43(11):2285–2295. doi: 10.1111/acer.14189

Figure 2.

Figure 2.

Plot of assessment of publication bias – minimal contrast studies

Notes. Small sample/small effect studies are assumed to characterize unpublished research, resulting in a significant and negative relationship, thus an asymmetrical funnel plot, when publication bias is present. Assessment of bias in CBT Tech effect compared to assessment only or minimal treatment shows some asymmetry, but the rank order correlation suggested no statistical relationship between precision and effect size (k = 6; τ = −0.06, p > .05).