The primary aim of this study was to examine the reliability and validity of a Turkish version of the Distance Education Learning Environment Survey (DELES) in post-secondary distance education. The second aim was to investigate empirically the conceptualisation of the distance education learning environment as a singular latent construct, within a second-order factorial structure that consists of six first-order factors. The DELES is a 34-item instrument for assessing social-psychological perceptions among distance education students. The tested hypotheses concerned key antecedents and consequences of the factorial structure of DELES in the Turkish context using confirmatory factor analyses. Principal component analysis of the Turkish data revealed six main factors of interest, which corresponded to the hypothesised constructs in the original DELES. The data suggested good reliability and validity for the Turkish DELES (DELES-TR) relative to the original version. Further, second-order analyses were conducted with two complementary samples to demonstrate the validity of six dimensions of the DELES-TR and their contributions to an overall factorial structure of social-psychological learning environment in distance education. Initial support for the second-order factorial validity of DELES-TR was found. Results indicate that a dimensional model of DELES-TR with the six first-order factors provided a superior fit to the data than first-order DELES-TR with six factors. Additionally, an investigation was conducted regarding associations between the DELES-TR's psychosocial scales and a student satisfaction scale. This study is unique in its focus on the learning environment in distance education in the Turkish setting.