2.4.2.2 Validity: Construct validiy
Convergent validity (CgV) is considered subcategories of construct
validity (CsV). Convergent validity was determined by performing the
Spearman correlation analysis between Tr-PEESS v2.0 scores and
Tr-PedsQLTM 3.0 EoE Module Total, Symptoms Total,
Symptoms I, Symptoms II score. The level of correlation coefficients
were regarded as follows: r ≥ 0.81–1.0 as excellent, 0.61–0.80 very
good, 0.41–0.60 good, 0.21–0.40 fair, and 0–0.20
poor.17 The negative correlation coefficients above
0.4 (19, 20) between Tr-PEESS v2.0 scores and
Tr-PedsQLTM 3.0 EoE Module Total, Symptoms Total,
Symptoms I, Symptoms II scores are supportive of CgV. Divergent validity
(DgV) confirms that a measurement tool or test has a low or no
relationship with variables it is not intended to measure, thus
establishing the test’s ability to discriminate between different and
independent concepts.19, 20 The lack or low
correlation between the dimensions of communication and food feeling of
Tr-PedsQLTM 3.0 EoE Module with Tr-PEESS v2.0 has also
been used to test DgV.