This descriptive research aims to investigate the construct validity of selected variables affecting the creativity of undergraduate students at Nakhon Ratchasima Rajabhat University. Seven hundred and sixty students participated in this study. They were tested on items relating to their creativity. The results showed that executive administration, teaching, instructional attitudes, motivation, and personality variables affected the creativity of the undergraduates. Creativity consisted of originality, fluency, flexibility, and elaboration. All factor loadings were over 0.30. After confirmatory factor analysis on creativity, the results showed an acceptable goodness-of-fit (χ 2 = 0.51, df = 1, p-value = 0.47497, RMSEA = 0.000). This shows that creativity measured by the creativity test is in accordance with the empirical data. Executive administration consists of policy, mission, and identity. Teaching consists of objectives, content, activity, and evaluation components. Instructional climate consisted of support, acceptance and participation. Motivation consists of needs, drives, and satisfaction. Personality consists of freedom, trust, and self-esteem. The results of the CFA indicated that each construct was well represented by the items used for the measurements.

This research aims to select variables affecting the creativity of undergraduate students and to develop a causal model from the results. A total of 760 students participated in this study. The instruments used were the Torrance Tests of visual and written language and a questionnaire about the variables that influence creativity. Also a confirmatory factor analysis (CFA), mean and standard deviations, and a path analysis with the LISREL version 8.8 and SPSS program were used. The results show that administration, teaching, instructional climate, motivation, and personality are the variables that affect the creativity of the undergraduate students. The results from the CFA show an acceptable goodness-of-fit. The means of creativity and variables affecting creativity of the undergraduate students were at a medium and high level (between 2.98 to 3.05 and between 3.94 to 4.13), respectively. The goodnessof-fit of the causal model of the variables affecting the creativity of the undergraduate students was developed on the basis of the empirical data as well. The statistical results obtained were χ 2 = 125.28, df = 104, p-value = 0.07622, GFI = 0.98, AGFI = 0.97 and RMSEA = 0.016, all of which are based on specified criteria.