⊕⊕⊕⊕High: the research provides a very good indication of the likely effect. The probability that the effect is substantially different† is low.⊕⊕⊕ΟModerate: the research delivers a good indication of the likely effect. The probability that the effect is substantially different† is moderate.⊕⊕ΟΟLow: the research delivers some indication of the likely effect. However, the probability that the effect is substantially different† is high.⊕ΟΟΟVery low: the research does not accurately estimate the likely effect. The probability that the effect is substantially different† is very high.
*This is also called 'quality of evidence' or 'confidence in effect estimators'.†Substantially different = a difference large enough to affect the decision.
