you can access Jon Zabala's thesis in English (and summary), here
https://www.frontiersin.org/articles/10.3389/fpsyg.2023.1095763/full
and you can read a summary in Basque here
https://www.ehu.eus/eu/web/guest/-/korrika-jon-zabala?utm_source=newsletter&utm_campaign=Campusa-newsletter-230&utm_medium=email&utm_content=Ikerketa_eu
