This study aimed to explore the changes in developing perceived dispositions of preservice early childhood education (ECE) teachers influenced by student teaching experience. A convergent mixed-method research design framework was used to collect data for the study. The study sample comprised 86 preservice teachers enrolled at a public university in Ankara, 14 university supervisors responsible for the student teaching experience, and 86 cooperating teachers from public and private schools who were assigned to preservice teachers during their student teaching experience. The results revealed that preservice ECE teachers' teaching dispositions increased after the student teaching experience.