Phase 1 Pool development, and reduction and refinement 1 | Phase 2 Pool reduction and refinement 2 after expert panel review & Focus Group | Phase 3 Pool reduction and refinement 3 (item analysis and PCA) after pilot testing the final pool |
− Item generation and collection. − Pool reduction and refinement (iteration 1) − Language adaption of English items in Greek | − Expert panel to verify content validity − Focus Group to examine face and aspects of content validity − Further pool reduction and refinement 2 to generate the Final Pool (114 items) − Scaling selection & instructions | − Pilot study of the final pool (N = 190) − Item analysis of the final pool, reduction and refinement (iteration 3) − Principal Components Analysis (PCA) − Finalizing the final version to be validated in a large sample |