Construct validity
We test whether your items actually measure what you claim — not just whether they're internally consistent.
Service · 05 of 07
Survey Methods
Instrument design, scale reliability, measurement invariance, and pilot analysis. Turkish-market expertise: translation equivalence, cultural framing, fieldwork briefing.
Fixed fee from
₺28.000
Typical delivery
3–6 weeks
For
Researchers · Orgs
Output
Analysis + instrument
Book free scope call →
What's included
Surveys that measure what you think they measure.
- →Instrument draft + translation equivalence check
- →Pilot analysis report — reliability and item performance
- →Scale reliability: Cronbach α, McDonald ω, CFA
- →Measurement invariance tests (configural, metric, scalar)
- →Fieldwork briefing notes
The engagement
How it works.
Day 0
01
Free 20-minute scope call
We discuss your research question, data, and timeline. You'll know by the end of the call whether this service fits — if it doesn't, we'll say so and suggest what does.
Day 1–2
02
Fixed-fee proposal
A detailed scope with total cost, timeline, and deliverables. No surprises, no scope creep — you approve before any work begins.
Agreed timeline
03
Analysis, delivery, and handoff
Annotated code, documented decisions, and a report structured so that you understand every choice. Two rounds of revisions included as standard.
Why measurement matters
Garbage in, garbage out — no matter how sophisticated the model.
Turkish-market ready
Translation equivalence testing, response style analysis, and culturally-informed question framing for Turkish samples.
AAPOR-standard documentation
Methodological transparency document suitable for publication as a supplementary file or technical report.
Invariance tested
If you're comparing groups (gender, region, organisation type), we test whether the scale means the same thing across those groups before you compare scores.
Pricing
Fixed fee. Quoted after scope call.
Every engagement starts with a free 20-minute call. We scope it together, then quote a fixed price before you commit.
Project
₺28,000
Total cost agreed before work begins. VAT exclusive. GBP/EUR pricing available on request.
Get a quote →
Typically includes
✓
Instrument draft + translation check✓
Cronbach α, McDonald ω, CFA✓
Measurement invariance tests✓
Pilot analysis + fieldwork briefing