Task Variety
the degree to which a job requires a variety of different activities and the use of different skills
§1The Principia rendering
A copyright-clean measure of this construct, authored by Principia and free to use — the one we can show in full.
Predicted psychometrics. These 10 items carry a design grade of A (avg design score 92/100) from the item-design model — an estimate pending calibration, not a measured reliability. Real responses (via deployment) sharpen it toward measured, which is what the licensing model collects.
§2The established instruments
What the field already uses — named and cited, not reproduced (item wording is copyrighted and withheld pending clearance).
- Job Diagnostic Survey (JDS) — Hackman and Oldham
§3The math on what we know
Synthesized priors from the live registry: pooled r, studies (k), total N, top study grade, and heterogeneity. Rows flagged for heterogeneity or single-study evidence are directional, not settled — read them as a central tendency.
What task variety predicts
| Outcome | r | k | N | Grade | Confidence |
|---|---|---|---|---|---|
| Work Engagement | +0.53 | 2 | 15,950 | B | coherent |
| Job Satisfaction | +0.46 | 1 | 50 | B | single study |