The use of polychoric and Pearson correlation matrices in the determination of construct validity of Likert type scales
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Tarih
2019
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Mehmet Tekerek
Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
No matter how strong the theoretical infrastructure of a study is, if the measurement instruments do not have the necessary psychometric qualities, there will be a question of trust in interpreting the findings, and it will be inevitable to make wrong decisions with the results. One of the important steps in scale development/adaptation studies is to provide evidence of the experimental validity. In order to reveal evidence of construct validity of Likert type scales, to identify factor structures, to confirm previously predicted structures, factor analysis is used. The primary issue to be examined is the level of measurement of the variable and one of the leading decisions that must be taken is which relation matrix will be used. This descriptive research is based on the effects of using Pearson or polychoric correlation matrix in the factor analysis. It is determined that items showed different item-total correlations, loading values and correlation coefficients, different factor numbers emerged, different items were removed out of the scale, confirmation status of the structure has changed.
Açıklama
Anahtar Kelimeler
Factor analysis, Polychoric correlation matrix, Pearson correlation matrix, Likert type scales, Construct validity
Kaynak
Turkish Journal of Education
WoS Q Değeri
N/A
Scopus Q Değeri
Cilt
8
Sayı
3
