Twins at puberty:A follow-up study of 32 twin pairs
Akerman, Brita Alin
Παιδική ανάπτυξη -- Γονέας και παιδί -- Γνωστική-αναπτυξιακή θεωρία -- Parent and child --
Ελληνική Ψυχολογική Εταιρεία
Thirty-two twin pairs were followed by means of ability tests and semi-structured interviews at regular intervals from birth to adolescence in order to study theircognitive development. The tests consisted of a verbal, a spatial, a number series, and a mathematical test. In addition, a questionnaire was administered regarding interests, attitude toward school and relationship with parents and co-twins. Relationships were also studied in semi- structured interviews, usually with both twins present. Twins born at or near term and with a normal birth weight showed normal development, while prematurity and growth retardation were associated with a predisposition toward a slow cognitive development, even at the age of 13. Also, twins compared to singletons seemed to have more difficulty in developing independence and achieving a positive selfesteem (identity), possibly as a result of their struggle to emancipate themselves from both parents and cotwins.