Abstract
Within the teaching-learning process, intervention in the classroom is without doubt one of the most difficult and complex to design and carry out in search of achieving greater possible degree of learning by students. Due to the importance of this construct, the objective of this study was the development and validation (sample of 1401 students aged between 10 and 17 years) of a motivational assessment questionnaire of the learning process. The results offer an instrument consisting of 33 items, which provides information on intrinsic motivation, extrinsic and comprehensive Cronbach's α of .83, .93, and .93 respectively. The costs of interpretation of the questionnaire for each type of motivation are divided by gender and age, thus providing comparisons between peer groups reliably.