Job scope and affective commitments: the moderating role of perceived organizational support and leader-member exchange/Envergure du poste et engagement: le role moderateur du soutien et des relations avec le superieur/Envergadura del empleo y compromiso: el rol moderador del apoyo y de la calidad del intercambio entre lider y miembro

This study examines the moderating effect of the relational context of jobs on the relationship between job characteristics and affective commitment towards the organization, the occupation and customers. The relational context is captured through perceived organizational support and leader-member exchange. We hypothesized that perceived organizational support would fill employees' socio-emotional needs and represent a sympathetic concern and indulgence from the organization toward employees. In contrast, leader-member exchange reflects a social exchange perspective in which the supervisor's support is associated with the aim of improving employee performance. These considerations lead to expecting perceived organizational support to act as a negative moderator of the relationships of job characteristics (job scope) to affective commitment to the three targets of interest. on the contrary, we predict that leader-member exchange will act a positive moderator of the effects of job scope on affective commitments.