This study aimed to evaluate the validity and reliability of measurement instruments related to CTB, proactive personality, information literacy, and knowledge sharing. A quantitative approach was employed, involving 47 respondents from the Business Education Study Program, using stratified sampling techniques. Instrument validation using Pearson Product-Moment correlation showed that 28 out of 30 items were statistically valid, with correlation coefficients between 0.296 and 0.707. Reliability tests using Cronbach's Alpha demonstrated excellent internal consistency (α = 0.920). Additionally, normality testing with the Kolmogorov-Smirnov method confirmed data normality (p-value = 0.074). These findings confirm the effectiveness of the instruments in measuring proactive personality, information literacy, knowledge sharing, and CTB. Although most items exhibited strong validity and reliability, further refinement is recommended for two items with lower validity. Practically, this validated instrument significantly contributes to the professional development of educators, especially in business and marketing education.
Rusmana et al. (Mon,) studied this question.