[ca] L'ètica relacional, constructe distintiu i principal de la teràpia contextual, fa referència a una ètica de la cura i de la responsabilitat que hi ha entre les persones i que consisteix a reconèixer i assumir la responsabilitat d'examinar el que s'ha rebut i el que s'ha donat (fer un balanç entre els drets i les obligacions recíproques), i en comprometre's a mantenir l'equitat d'acord amb la naturalesa de la relació. Inclou els conceptes de confiança, lleialtat i dret; i la justícia funciona com la seva potència reguladora. La diferenciació del self, constructe central de la teoria familiar sistèmica de Murray Bowen, és un tret que involucra capacitats intrapersonals (moderar la influència de les emocions en el funcionament cognitiu) i interpersonals (equilibrar les forces de separació-intimitat / autonomia i unió-vinculació) i la viabilitat per equilibrar-les. Aquesta tesi doctoral s'estructura al voltant de dos objectius generals: el primer, traduir i adaptar per a la població espanyola la Relational Ethics Scale (RES), i el segon, analitzar la relació entre ètica relacional i diferenciació del self (utilitzant l'adaptació a l'espanyol del Differentiation of Self Inventory-Revised (S-DSI)) en poblacions clíniques i no clíniques i comparar els resultats obtinguts. Per aconseguir aquests objectius, i després d'haver desenvolupat un treball de revisió de la literatura científica i reflexió teòrica, es va estructurar la tesi en dos estudis. El primer, dut a terme amb una mostra total de 1181 participants, consisteix en la traducció, adaptació i validació d'un instrument de mesura, obtenint la S-RES (Spanish-Relational Ethics Scale). El segon, realitzat amb una mostra no clínica de 1230 subjectes i una altra clínica de 241 subjectes, analitza les connexions que hi ha entre ètica relacional, diferenciació del self i determinades variables sociodemogràfiques. Gràcies a aquesta investigació, per un costat, és possible comptar amb un instrument psicomètricament vàlid en l'idioma espanyol per mesurar el nivell d'ètica relacional i per l'altre, s'han obtingut resultats empírics que suggereixen que l'ètica relacional i la diferenciació del self estan altament interconnectades i vinculades amb la salut i amb l'assoliment d'una individuació madura. Partint d'aquesta reflexió i resultats, s'ofereixen algunes orientacions per a la pràctica clínica llur aplicació podria afavorir la salut, la qualitat de vida de les persones i el benestar, individual i relacional.

[en] Relational ethics, main and distinctive construct of contextual therapy refers to the ethics of responsibility and caring that prevails among people. It involves recognizing and assuming the responsibility of evaluating what one has received and one has given (striking a balance between reciprocal rights and obligations), and making a commitment of upholding fairness according to the nature of the relationship. Relational ethics includes the concepts of trust, loyalty and entitlement; justice works as its regulating power. Differentiation of self, the key construct of Murray Bowen's systemic family theory, is a trait that involves intrapersonal capacities (moderate the influence of emotion in cognitive functioning) and interpersonal ones (offset separation- intimacy forces/autonomy and togetherness-bonding forces), including the viability of balancing them. This doctoral dissertation is structured around two general objectives: the first, to translate and adapt the Relational Ethics Scale (RES) to the Spanish population, and the second, to analyze the connection between relational ethics and differentiation of self (using the adaptation to the Spanish population of the Differentiation of Self Inventory-Revised (S-DSI)) in clinical and non-clinical populations and compare the results obtained. To achieve these objectives, after developing a scientific literature review and theoretical reasoning, we decided to structure the dissertation in two studies. The first, performed with a total sample of 1181 participants, consists of the translation, adaptation and validation of a measuring instrument, obtaining the S-RES (Spanish-Relational Ethics Scale). The second, involving a non-clinical sample of 1230 subjects and a clinical one of 241 people, analyzes the existing connections between relational ethics, self-differentiation, and certain sociodemographic variables. On the one hand, thanks to this research it is possible to have a psychometrically valid instrument, in Spanish, to measure the level of relational ethics, and on the other, empirical results were obtained, suggesting that relational ethics and differentiation of self are highly interconnected and linked to health and to the achievement of mature individuation. Based on this reasoning and these results, a few guidelines are provided for clinical practice, whose application might benefit people's health, quality of life, and individual and relational well-being.