Objectives:

To determine the characteristics of motivation and to understand the significance for teachers, related to participation in sex education training processes.

Methodology:

Mixed method: quantitative phase based on the theory of Deci and Ryan, internal and external motivation, and demotivation were assessed using the Rasch model; qualitative stage, with a phenomenological approach, included the application of a semi-structured interview.

Results:

104 teachers from seven educational institutions in Socorro-Santander participated in the study. Analysis of items and teachers, according to the Rasch model for the three types of motivation, had good results that allowed us to identify the related characteristics and to determine that internal motivation led, on the majority of teachers, to participate in the formative process of sex education. This was corroborated by the interviews, where teachers interpreted the process as an opportunity to improve their teaching practice and increase their knowledge on the subject.

Conclusions:

The allocation of 66% of teachers at the top of the internal motivation scale allowed us to identify the motivational force to attend the formative process. To respond to interests and needs, as well as to reinforce autonomy and self-determination in educational groups that require training in sex education, is a good way to achieve stable and lasting participation and commitment as trainers in the area. Based on our bibliographic search, this study on motivation and the processes of teacher training in sex education is a pioneer.