Publication Bias & the Funnel Plot

The scientific method promises that experimentation and analysis converge on the truth — but only if every result that gets run also gets seen. This simulator draws a batch of independent studies that all measure the same real effect, each with its own sample size and sampling noise, computes each study's significance the way a real researcher would (z-score and two-tailed p-value against the null hypothesis), and then filters which ones get "published" using an adjustable file-drawer strength. Watch the 3D funnel plot — effect size against precision — go lopsided as bias increases, and watch the naive published-only meta-analytic estimate drift away from the true effect you set, exactly the mechanism behind real-world reproducibility problems in science.