Questions selected for triangulation should not include those better addressed by traditional study methods, such as randomized controlled trials or cohort studies.
This can be explained by the fact that the questions selected for the short forms concern problems that children reported as the most frequent and the most bothersome.
The two other questions selected for the latest version of the instrument measured the impact of the symptoms on school and/or work attendance and on sporting and/or recreational activity participation.
The association was somewhat stronger for the regression short-forms in comparison to impact short-forms, which can be explained by the fact the questions selected for the regression short-forms are those that explain the most variation in the overall scores of the CPQ11 14.
Previous unpublished analysis from the same material showed that on T1, where we measured QoL with the full WHOQOL-Bref scale, there was moderate to high correlations between the full scale score and the two questions selected for the present publication.
The 34 clicker questions selected for analysis were rated as either requiring Bloom's lower-order cognitive skills (LOCS) or higher-order cognitive skills (HOCS; Crowe et al., 2008) by two independent raters and the instructor; a final rating for each question was reached by consensus.
