Dataset,Has StudentID?,Has ItemID?,Has Individual Item Response (correct/incorrect)?,Has Selected Answer Option (A/B/C/D)?,Has Question Text?,Has Answer Option Text?,Has Correct Answer?,Has Gender?,Has Race/Ethnicity?,Has SES/Income Proxy?,Has Other Grouping Variables?,Can Do Mantel-Haenszel DIF?,Can Do Distractor-Level DIF?,Can Interpret WHY Items Show DIF (via text)?
EEDI,✅,✅,✅,✅,✅,✅,✅,✅,❌,✅ (PremiumPupil),❌,✅ YES,✅ YES,✅ YES
PISA 2022,✅,✅,✅ (scored 0/1/2),❌,⚠️ ~30-50% (PDFs),⚠️ ~30-50% (PDFs),⚠️ ~30-50%,✅,❌ (country only),✅ (ESCS),"✅ Immigration, Language",✅ YES,❌ NO (no selected option),⚠️ PARTIAL (released items only)
TIMSS 2019,✅,✅,✅ (scored),❌,⚠️ ~30-50% (PDFs),⚠️ ~30-50% (PDFs),⚠️ ~30-50%,✅,❌,⚠️ (home resources proxy),"✅ Country, Language",✅ YES,❌ NO,⚠️ PARTIAL
NAEP,❌ public / ✅ restricted,❌ public / ⚠️ restricted,❌ public / ⚠️ restricted (sparse),❌,⚠️ ~20-30% released,⚠️ partial,⚠️ partial,✅ restricted,✅ restricted,✅ restricted (NSLP),"✅ restricted (ELL, IEP)",❌ public / ⚠️ restricted,❌ NO,❌ NO (not linkable)
ASSISTments 2012-13,✅,✅,✅,❌,❌,❌,❌,"⚠️ (has column, may have missings)",❌,⚠️ school-level FRPL,"✅ School, ELL, IEP",⚠️ YES (if gender coverage ok),❌ NO,❌ NO (no text)
ASSISTments 2009-10,✅,✅,✅,❌,❌,❌,❌,⚠️ (~50% missing),❌,❌,✅ School,⚠️ WEAK (50% missing gender),❌ NO,❌ NO
FoundationalASSIST,✅,✅,✅,✅ (answer_text),✅ (Problem Body HTML),✅ (MC Options),✅,❌,❌,❌,❌,❌ NO (no grouping var),❌ NO (no grouping var),N/A (no DIF possible)
EdNet,✅,✅,✅,✅ (a/b/c/d),❌ (copyrighted),❌,✅,❌,❌,❌,❌,❌ NO (no grouping var),❌ NO (no grouping var),❌ NO
Junyi,✅,✅,✅,❌,❌,❌,❌,❌,❌,❌,❌,❌ NO,❌ NO,❌ NO
OULAD,✅,❌ (assessment-level),❌ (assessment-level),❌,❌,❌,❌,✅,❌,✅ (IMD),"✅ Disability, Age, Education",❌ NO (no item data),❌ NO,❌ NO
Duolingo SLAM,✅,✅ (token-level),✅ (token-level),N/A (recall task),✅ (sentence),N/A,✅ (implicit),❌,❌,❌,⚠️ L1 language only,⚠️ CREATIVE (L1 as group),❌ NO,⚠️ (has sentence text)