Translation Assessment

Translation assessment is a key element for producing high quality translations. The ESS incorporates several steps for assessing the quality of its questionnaire translations:


Translation verification by an external service provider was introduced as an additional stage to the translation process in ESS Round 5. It involves a linguistic quality check of a selection of items for all language versions integrated within the TRAPD scheme, i.e. during the translation process. Translation verification is carried out by cApStAn.

Full Verification Instructions are provided to the national teams to assist them with the verification process. The national teams are asked to confirm acceptance of the comments made during the verification or to explain why they feel that the suggestions made by the verifiers cannot be accepted. The verification step allows a close discussion on translation issues and decisions taken between the national teams, cApStAn and the ESS Translation Team.

The entire translation process, including all steps of the TRAPD scheme, verification and SQP coding, for each language version is documented using a (Translation and) Verification Follow-up Form.

The quality of the verification work is also regularly assessed by members of the ESS Translation Team and Translation Expert Panel.

Survey Quality Predictor (SQP) coding

The ESS is the only cross-national survey to use the Survey Quality Predictor (SQP) to control for the equivalence between the characteristics of a selection of translated questions and the original wording of the question in British English.

Following the instructions given in the SQP guidelines and codebook, all national teams are asked to code a selection of their translated questions using SQP. This allows to compare the characteristics of the source and translated questionnaires in order to detect and prevent differences.


National pre-tests in the ESS have a dual purpose within the fieldwork preparation process. On the one hand, they allow to test whether the survey instrument works as intended from a technical point of view, e.g. in terms of routing techniques, timestamps or measuring the interview length. On the other hand, they are a full-fledged element within the TRAPD scheme, representing the ‘P’ in this acronym: they allow to test whether items or terms are not easily or incorrectly understood by the target populations; in case of doubt, several translation options may be fielded in the pre-test and compared to each other as a last decision-making point before the actual fieldwork.