Harmonization summary
1 label-stable codes
- Label changes detected
- 0
- Multiple dataset contexts
- 0
- Unique codes
- 1
- Enriched codes in this report
- 0
Praxis Data Lab · Variable History
Variable history and harmonization report.
Review variable definitions, cycle chronology, survey design, laboratory methods, method-change boundaries, detection limits, and evidence-backed harmonization actions.
1matching variable codes
7 release records across 7 datasets and 7 cycles.
Search scope
Results for “ACD010C”
Scientific safeguard
Qualified assessment is authoritative; chronology remains supporting evidence.
Praxis separates source-stated method or instrument changes from automated differences in CDC/NCHS method text. The qualified harmonization assessment below is the researcher-facing conclusion; method chronology explains the underlying evidence and does not override that adjudication.
Variable-by-variable chronology
Qualified harmonization assessment and indexed evidence
Each variable first shows the current qualified assessment used by Study Builder, followed by cycle-specific source evidence and method chronology.
ACD010CCompatible with harmonization
What language(s) {do you/does SP} usually speak at home?
- Observed years
- 1999–2023
- Release records
- 7
- Datasets
- 7
- Components
- Questionnaire
Qualified Praxis harmonization assessment
Compatible with harmonization · moderate confidence
No blocking method discontinuity is identified inside the selected cycle span, but one or more longitudinal changes require explicit harmonization conditions before pooling.
Evidence provenance: Praxis automated inference from indexed CDC/NCHS evidence
Relevant boundaries: 1999-2000 → 2001-2002 · 2001-2002 → 2003-2004 · 2003-2004 → 2005-2006 · 2005-2006 → 2007-2008 · 2007-2008 → 2009-2010 · 2009-2010 → 2021-2023
Praxis harmonization actions
- Apply cycle-specific eligibility rules and restrict the pooled analytic population to a defensible common target population.
- Verify merge grain, companion variables, and component-specific analytic guidance for the new file context.
- Confirm that the construct and coding are unchanged before pooling or recoding.
Supporting CDC/NCHS evidence
Variable names / labels over time
- What language(s) {do you/does SP} usually speak at home? — 1999-2000 · 2001-2002 · 2003-2004 · 2005-2006 · 2007-2008 · 2009-2010 · 2021-2023
Cycle-by-cycle release history
- 1999-2000: ACQ — What language(s) {do you/does SP} usually speak at home? — Acculturation (Questionnaire)
- 2001-2002: ACQ_B — What language(s) {do you/does SP} usually speak at home? — Acculturation (Questionnaire)
- 2003-2004: ACQ_C — What language(s) {do you/does SP} usually speak at home? — Acculturation (Questionnaire)
- 2005-2006: ACQ_D — What language(s) {do you/does SP} usually speak at home? — Acculturation (Questionnaire)
- 2007-2008: ACQ_E — What language(s) {do you/does SP} usually speak at home? — Acculturation (Questionnaire)
- 2009-2010: ACQ_F — What language(s) {do you/does SP} usually speak at home? — Acculturation (Questionnaire)
- 2021-2023: ACQ_L — What language(s) {do you/does SP} usually speak at home? — Acculturation (Questionnaire)