*3.1. Purpose and Design*

The purpose of this study was to evaluate the changes in specific aspects of emotional well-being derived from the Nightingale mentoring programme aimed at adolescents of foreign origin in the primary and secondary schools of Barcelona, Tarragona, Girona, Guipúzcoa and Navarra. In order to contribute to the literature on social mentoring, this study examined the e ffects of mentoring on the psychological well-being of minors of immigrant origin.

The evaluation of some aspects of participants' emotional well-being resulting from applying the programme was performed through a pre-test–post-test design of a single non-randomised group [49,50], with a six-month di fference between the first and second data collections on the study's di fferent areas of focus. A longitudinal strategy was chosen through a dynamic comparison, including the repetition of response measures.

Specifically, this assesses aspects related to the mental health of the mentee, their self-esteem and personal satisfaction, as well as their perceptions of social support and racial discrimination during their integration process in the host country.
