We curate and research evidence-based design solutions to bring out the best in human nature online.
We reserve Validated Grades for interventions that are both peer-reviewed and replicated. This is our highest evidentiary grade.
Convincing Grades are for interventions with peer-reviewed evidence. They have yet to face attempted replication. This is our penultimate grade.
Likely Grades are for interventions with preprinted evidence. Preprints are academic manuscripts awaiting formal peer review.
Tentative Grades occur when randomized controls or independence from vested interests are absent. It also happens to Convincing interventions if they fail to replicate.
Emergent Grades are for interventions with only qualitative evidence.
Inference Grades are for interventions that lack direct evidence. Yet analogous studies, expert opinions, or first principles, suggest that they might work.