The QINV project runs along three strands of research on the perception of interpreting quality:
- Vertical study of quality criteria: this strand examines the impact of prosody-related components of individual criteria on users' impressions. It complements the "horizontal" study of criteria that characterised pioneering research on quality. – This strand follows in the steps of earlier vertical studies.
- Methodology for survey-based quality studies: This strand aims to advance questionnaire design and administration methods.
- Preparation of experimental material: This strand explores options of experimental treatment for certain features of spoken discourse which may have an impact on the perception of individual quality criteria.