Free research tools · Page 10
Search and filter all free research toolsScreening adjudication queue
Separate reviewer disagreement, pending decisions and concordant exclusions.
Known-item retrieval sensitivity
Check whether a search retrieves a prespecified set of known eligible records.
Data dictionary version comparison
Find removed fields, new fields and changes in declared field types across two schemas.
Monte Carlo permutation p-value audit
Calculate a plus-one tail probability and check the resolution of a random permutation test.
Spearman–Brown Test Length Planner
Project reliability under parallel-item assumptions and round a target length upward.
Independent Poisson Rate Ratio
Compare event counts per exposure with an approximate log-Wald 95% interval.
Category Diversity Summary
Describe categorical distributions with Shannon entropy and effective category counts.
Binary Prediction Score Audit
Compute a binary Brier score from groups sharing an identical predicted probability.
Paired Mean Confidence Interval
Calculate a two-sided 95% t interval from the mean and SD of within-pair differences.
Rounded Percentage Count Checker
Find integer event counts compatible with a stated percentage and half-up rounding.
Standardized Covariate Balance Explorer
Compare continuous and binary baseline covariates with explicit standardization denominators.
Logistic Interaction Scenario Explorer
Translate four specified logit coefficients into probabilities and contrasts for two binary predictors.