Fig. 4
From: g versus c: comparing individual and collective intelligence across two meta-analyses
Funnel plot: Publication Bias and the c-factor. Note. The funnel plot estimates the number of missing studies, assuming they retain the null (e.g., demonstrate zero correlation), required to reduce the Z-value below a .05 alpha (two-tailed) cutoff of 1.96. In this instance, the presence of empty dots (i.e., actual studies) and the absence of black-filled dots (i.e., imputed studies) suggest publication bias has not been detected using this test