The purpose of the present study was: (a) To describe the relationship in sibling's dyads, separated in two groups - G1, with pre-adolescent mentally retarded sibling, and G2, with this adult sibling; (b) To compare the performance of both groups in the interactions; and (3) To evaluate differences in the relationships between the groups when family social support is taken into account. Sessions of sibling's interactions were videotaped, and self-report instruments were used. The caretakers answered scales of social support. Results suggested differences concerning the behavior of the helper of the sibling with characteristic development, with highest occurrence in G1. Scales' results indicated statistically significant difference for the Parenting Support from Family/Friends Scale, showing less support for G1. It is possible to suggest that because families from G1 have less support from this level from families and friends, a bigger demand of help is required from the disabled member, which can be compensated by the young siblings with typical development, who perform the helper's role in greater level than the adults.
Sibling relationships; mental disability; social support; observation
