Resumen: The educational use of portfolios has been increasing in the last few years, especially as technology has also developed electronic versions of portfolios. Although there is abundant information about their benefits and practice description, few studies provide empirical evidence of their implementation. The objective of this study was to provide initial evidence about the use of the portfolio in higher education. Concretely, we aimed 1) to explore the correlation between students‚Äô performance on the portfolio and their performance on more traditional assessment methods 2) to explore whether student‚Äôs personal variables predict performance in key elements of the e-portfolio, such as individual reflections, and if these contribute to general academic performance in the course, and 3) to evaluate whether the use of the e-portfolio during a semester changes the students‚Äô self-efficacy and engagement. For this purpose, an initial sample of 73 students were recruited, and an e-portfolio (based on Mahara) was implemented over a semester. The results showed that performance on the portfolio correlated with the score obtained on multiple choice tests. There was an increase in self-efficacy after one semester of e-portfolio implementation, and engagement proved to be an important predictor of the final course grade through the mediation of individual reflections. These results offer preliminary and promising evidence about the relationship of a specific element of e-portfolios, individual reflections with several variables related to academic achievement such as self-efficacy and engagement. Idioma: Inglés DOI: 10.1007/s10639-021-10827-2 Año: 2021 Publicado en: EDUCATION AND INFORMATION TECHNOLOGIES 27 (2021), 5233–5248 ISSN: 1360-2357 Factor impacto JCR: 3.666 (2021) Categ. JCR: EDUCATION & EDUCATIONAL RESEARCH rank: 62 / 270 = 0.23 (2021) - Q1 - T1 Factor impacto CITESCORE: 6.6 - Social Sciences (Q1)