Dr Mircea Zloteanu 🌺🌞🍃#statstab #281 Correcting Cohen’s d for Measurement Error (A Method!)
Thoughts: Scale reliability can be incorporated into effect size computation (i.e., remove attenuation)
For a more robust and detailed way, see our Effect Size online (free) book:
https://matthewbjane.quarto.pub/Artifacts-and-Bias.html#correcting-for-measurement-error
For a quick-and-dirty way: just divide your ES by the sqrt(reliability):
