Mixed methods research designs
Most mixed-methods studies are built on one of four core designs. You don’t pick one because you like it — you derive it from two decisions: timing (do you collect the strands concurrently or in phases?) and priority (which strand leads?). Get those two right and the design names itself.
The two decisions that pick the design
- Timing. Concurrent (both strands in the same window) or sequential (one phase, then the other)?
- Priority. Equal weight, or is one strand primary and the other supplementary? Write it honestly in notation — uppercase = primary, lowercase = supplementary (e.g.
QUAN → qual).
The four core designs
| Design | Timing & flow | Use it when… |
|---|---|---|
| Convergent parallel | Concurrent · QUAL + QUAN · merge | You want corroboration or a fuller picture, and both strands carry roughly equal weight. |
| Explanatory sequential | Sequential · QUAN → qual · connect | You have quantitative results that need a “why” — the numbers lead, qualitative explains them. |
| Exploratory sequential | Sequential · qual → QUAN · build | Little is known up front, or no adequate instrument exists — explore first, then test/generalize. |
| Embedded (nested) | One strand inside a larger design · embed | A secondary strand answers a different but related question within a primary study (e.g. a qualitative process evaluation inside a trial). |
How the decisions map to a design
- Concurrent + equal weight → convergent parallel (merge the two sets of results).
- Sequential, quantitative first → explanatory sequential (qualitative explains the numbers).
- Sequential, qualitative first → exploratory sequential (quantitative tests what you found).
- One strand serving a larger study of the other → embedded.
Whichever you choose, the design only names the structure. The strand where the work is won — or lost — is integration: the named point where the strands actually meet. Plan that before you collect any data.
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Frequently asked questions
What are the four core designs?
Convergent parallel, explanatory sequential, exploratory sequential, and embedded.
How do I choose one?
From timing and priority: concurrent + equal → convergent; quant-then-qual → explanatory; qual-then-quant → exploratory; one strand inside another → embedded.
Explanatory vs exploratory sequential?
Explanatory = quantitative first, then qualitative to explain it. Exploratory = qualitative first, then quantitative to test it. The order is the difference.
What does QUAN/qual notation mean?
Uppercase = primary strand, lowercase = supplementary. Don’t claim equal priority when one strand is much smaller.