The science behind our assessments
Discover how our tests meet the highest psychometric standards to deliver results you can trust.
We've helped 6,000+ companies with our assessments and guidance
Modern psychometrics, not guesswork
Our assessments are developed using Item Response Theory (IRT)—a modern psychometric framework that offers far greater accuracy than older Classical Test Theory (CTT) methods. Rather than simply tallying correct answers, IRT takes question difficulty into account, delivering more meaningful scores and more consistent candidate experiences. This enables a smarter, fairer, and more robust assessment process.
Faster and Fairer with Computer Adaptive Testing (CAT)
Thanks to IRT, our assessments can be delivered adaptively—getting harder or easier depending on each candidate’s performance. This makes the test experience smoother, more engaging, and far shorter without sacrificing accuracy. Adaptive testing also makes it significantly harder to game the system, as each candidate receives a unique set of questions.
- Greater precision in less time
- Customised experience for every candidate
- Strong protection against cheating
Measuring using the leading models of personality and cognition
Our assessments are grounded in robust, well-established psychological models—not pop psychology. For example, our personality assessments are built on the Big Five, HEXACO, and Core Self-Evaluations, while our cognitive tools are developed using decades of research in psychometrics and intelligence testing. This ensures your results are interpretable, meaningful, and defensible.
Fairness at the core
Fairness isn’t an afterthought—it’s engineered into every stage of development. Using Differential Item Functioning (DIF) analysis, we check for and remove bias at the individual question level. This goes far beyond standard adverse impact analysis and ensures our tests remain fair across all protected groups, even as we continue to update and improve them over time.
- Fair and inclusive by design
- Bias checked at the item level—not just after the fact
- Continuously monitored for long-term equity
Your assessment partner, more than just a tool
Have complete confidence in the assessment process with an expert business psychologist on your side
Personalised consultations
Our business psychologists are always on-hand to provide expert guidance tailored to your selection & assessment needs.
Complexity into clarity
We help demystify the science behind psychometric assessments, so you can confidently make data-driven selection decisions.
Instant support
Our dedicated UK support team is always there for you. Fast assistance on everything from candidate support to technical questions.
Trusted by hundreds of organisations to deliver scientifically robust, data-driven assessments.
These are the results you can expect with Test Partnership.
80%
Reduction in time to hire92%
Candidate completion rate93%
Candidate satisfaction