highly significantp -value <0.05
89 Bartlett's test of sphericity of DD, PHSL, and RC is highly significant by the p -value of 0.000 ( p -value <0.05), degree of freedom ( df ) of 6, 435, and 120, respectively, and χ 2 of 1756.651, 23,693.175, and 13,898.734, respectively, which is suggested that the matrixes are correlation, not identity matrixes. 90 Therefore, EFA is appropriate.