RESUMEN
The assessment of the acquisition of professional skills is an essential process in occupational therapy students. Until now, there has been no standardized and validated instrument for evaluating these skills in Spanish occupational therapy students. This study reports the development and testing of the psychometric properties of the professional skills in students of occupational therapy during their practical training. METHODS: A new instrument was developed to assess the professional skills of occupational therapy students, called CPTO. A total of 69 occupational therapists participated in evaluating 295 occupational therapy students from the University of Granada, between the 2018 and 2021 academic years. RESULTS: Of a total of 79 items, the factor analysis yielded a final solution of 33 items, which explains 70.22% of the variance with the following three dimensions: (1) self-appraisal and professional responsibility (α = 0.951); (2) communication skills and delivering intervention (α = 0.944); and (3) clinical reasoning for assessing and planning the intervention (α = 0.947). The instrument allows students with low, medium, high and excellent clinical skills to be differentiated according to the cutting points established by the quartiles. CONCLUSION: the instrument has good psychometric properties, and is a useful tool to assess professional competencies in occupational therapy students during their practice placement education.