Item-Response Theory

Common Metrics

Developing and validating measurement models for multiple PROMs measuring the same PRO.

PROMIS Profile 29 Reference Scores

This web application lets you calculate sample specific, general population reference scores for the PROMIS Profile 29.

Common metrics score calculator

This web application lets you estimate theta scores on common metrics.

German PROMIS National Center

Research on PROMIS tools in Germany

PROMIS Physical Function, Upper Extremity and Pain Interference Reference Scores for the elderly (50+)

A web application that can be used to obtain patient-specific reference values for PROMIS Physical Functioning, Upper Extremity, and Pain Interference item banks in general populations from the USA, UK, and Germany.

Webinar: Scoring of IRT based PROs

Yesterday, the PRO scoring webinar took place. Find my slides and a recording of the talk here. Feel free to get in touch if you have questions on the material.

More flexible response functions for the PROMIS physical functioning item bank by application of a monotonic polynomial approach

Purpose: In developing item banks for patient reported outcomes (PROs), nonparametric techniques are often used for investigating empirical item response curves, whereas final banks usually use parsimonious parametric models. A flexible approach …

New publication: More flexible response functions for the PROMIS physical functioning item bank by application of a monotonic polynomial approach

Carl Falk from McGill University in Montreal, Canada and I investigated the use of a more flexible IRT model to fit the PROMIS Physical Function Itembank. The paper has been now published in Quality of Life Research’s nonparametric IRT section.

Data: PROMIS Profile 29 general population data published

Today, we published PROMIS Profile 29 data from the general population in the UK, Germany and France at the Health Measures Dataverse. We hope that this data can be of use, e.

Webinar: Assessment of PROs using IRT

I held the webinar yesterday and there was quite some turnout. Unfortunately, the technology failed and i couldn’t record the webinar. Find my slides here, though! Feel free to get in touch if you have questions on the material.