The nursing critical thinking in clinical practice questionnaire for nursing students: A psychometric evaluation study

Aim: To adapt and validate the N-CT-4 Practice for use with Spanish nursing students.

Background: Promoting critical thinking is one of the primary objectives of nursing education programs all over the world. Using reliable and valid instruments to measure critical thinking is essential. The Nursing Critical Thinking in Clinical Practice Questionnaire (N-CT-4 Practice) is used internationally to assess critical thinking in nursing practice. However, little is known about the possible applications of this instrument in the context of nursing education.

Methods: Two-phase study: Phase I, adaptation of the N-CT-4 Practice for use with nursing students and verification of its content validity; phase 2, cross-sectional study to validate its psychometric properties in a sample of 331 nursing students from three university nursing schools. A subsample of 34 students completed the questionnaire on two occasions, with a time interval of two weeks. The construct validity and reliability of the instrument were tested using confirmatory factor analysis, convergent validity, internal consistency reliability and test-retest reliability. The STROBE guidelines and the COSMIN checklist were followed.

Results: All items obtained optimal content validity values. The model fit indices obtained from the confirmatory factor analysis supported the hypothesis of the four-dimensional structure on which the original questionnaire was based. Cronbach's alpha of 0.96 indicated high reliability. The correlations between the total score and the scores for the dimensions were statistically significant, positive and high, with values above r = 0.78 (p < 0.05). Lin's concordance correlation coefficient was 0.6 (p < 0.001).

Conclusions: The adapted version of the N-CT-4 Practice is suitable for measuring critical thinking skills in the educational context of the degree course in nursing in Spain. Its psychometric validation yielded satisfactory results.