Polytomous Limited

Polytomous Limited is an independent psychometrics and assessment consultancy specialising in standard setting and defensible decision-making for high-stakes assessments. We support organisations across education, language testing, and professional certification in designing, evaluating, and justifying assessment systems that are fair, transparent, and fit for purpose.

Our work is grounded in internationally recognised principles of educational measurement. With doctoral-level expertise in standard setting theory and practice, we help organisations establish and defend performance standards, ensuring that cut scores and classifications are evidence-based and aligned with their intended use. Beyond standard setting, we provide specialist support in assessment design, psychometric analysis, validation, and alignment to international frameworks. Our approach combines academic rigour with practical insight, working across paper-based, digital, adaptive, and performance-based assessments.

Polytomous operates independently and works closely with technical and non-technical stakeholders, translating complex psychometric evidence into clear, defensible decisions. We also place strong emphasis on capacity building, supporting organisations to develop sustainable internal expertise.