Research papers about students’ critical thinking disposition reported that truth-seeking subscale generally had the lowest score among six others. Preliminary research on high school students also supported that phenomenon. So, there was a need to propose a learning model to improve students’ truth- seeking disposition. Truth-seeking Learning Model (TLM) was developed to overcome it. The learning model consists of six phases. The aim of this research was to get the validity of both content and construct and the reliability of the learning model. The data were collected through Focus Group Discussion using learning model validity sheets. The validity and the reliability were analyzed using average score, inter- rater coefficient correlation, and Cronbach’s alpha. The results showed that the content and construct of the TLM were valid. The TLM was also reliable. It means that the TLM has a high quality.

Keywords : Learning Model, Validity, Truth-Seeking, Disposition.