Sa. Grahambermann, THE ASSESSMENT OF CHILDHOOD SIBLING RELATIONSHIPS - VARYING PERSPECTIVES ON COOPERATION AND CONFLICT, The Journal of genetic psychology, 155(4), 1994, pp. 457-469
The levels of cooperation and conflict in the relationships of 40 sibl
ing pairs, 11 to 14 years old, were explored from several different pe
rspectives. Ratings of levels of cooperation and conflict in the sibli
ng relationship were obtained from the participants, siblings, and mot
hers. Amounts of cooperation and conflict were also coded from respons
es to a projective story test that elicited perceptions of the relatio
nship from each child, and from their conjoint performance on three in
teractive tasks. Either child's perspective on the sibling relationshi
p evidenced more conflict and less cooperation relative to maternal ev
aluations. Interactive tasks revealed more cooperation, whereas projec
tive stories revealed more conflict for these siblings. In addition, l
evels of cooperation varied by sex, birth order, and dyad type, wherea
s conflict levels differed only by dyad type.