Free Tools › GOSH Plot Generator

GOSH Plot Generator (Graphical Display of Study Heterogeneity)

Fit the meta-analysis to every combination of studies (or a large random sample of them) and plot each subset's pooled effect against its I², to see which studies drive heterogeneity.

FreeNo account neededYour data stays in your browser

Your dataColumns: study, effect size (log scale for ratios) and standard error (or variance). Up to 30 studies.
Model
-0.200.20.40.60%25%50%75%100%Pooled estimate (fixed effect)I²

20,000 randomly sampled subsets of the 32,767 possible are shown. Separate clusters of points, or a study whose inclusion (in red) shifts the estimate or I², point to influential studies or distinct subgroups. Fixed-effect results match metafor's gosh().

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How to Use the GOSH Plot Generator

  1. 1

    Paste your studies

    Copy the columns from Excel or Google Sheets, with names in the first row, or load the example.

  2. 2

    Read the results

    Estimates, tests and the figure update instantly in your browser.

  3. 3

    Export

    Download the figure (SVG or PNG) and copy a results sentence.

How to read a GOSH plot

Each point is the result of one subset of studies. When the studies are consistent, the points form a single, roughly symmetrical cloud. Separate clusters suggest that one or a few studies shift the pooled effect or heterogeneity.

Highlighting subsets that contain a particular study shows whether that study is responsible for a cluster. Use the plot to explore, then report sensitivity analyses with and without the influential studies.

How it is calculated

Sources

GOSH Plot Generator: FAQ

Why is there a limit on the number of studies?

The number of subsets doubles with each added study, so larger meta-analyses are explored with a random sample of subsets.

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