The award-winning Survey Quality Predictor (SQP,  http://sqp.upf.edu/) software contains a database of survey questions that allows users to consult existing questions and their measurement quality, adding newly created questions and predict their measurement quality, and consulting translations of survey questions. The SQP database contains a wide range of survey questions concerning many different topics in many different forms and languages.

SQP was created by RECSM co-founder Willem Saris.

Since 2022, GESIS is responsible for the development of the next version, SQP3.0 (https://sqp.gesis.org/). UPF is still hosting an older version, SQP2.1 (http://sqp.upf.edu/). 


See the improvement from SQP2 to SQP3 in a poster, prepared by Wiebke Weber and Melanie Revilla, for the Eutopia Science Fair 2021: