The Secure-Base Phenomenon across Cultures: Children's Behavior, Mothers' Preferences, and Experts' Concepts. Posada, German; And Others Monographs of the Society for Research in Child Development, v60 n2-3 p27-48 1995, This phenomenon is hypothe cultural universality hypothesis, Posada et al. (1995) sized to be observable in children who have been asked mothers to report on their child's behavior exposed to ordinary parental care., Posada et al. (1995) examined mothers and toddlers from China, Columbia, Germany, Israel, Japan, and the United States on what constitutes a securely attached child. How did these mothers describe an "ideally secure" child? a., Posada et al. (1 9 9 5) examined mothers and toddlers from China, Colombia, Germany, Israel, Japan, and the United States on what constitutes a securely attached child., Research findings indicate that the secure-base phenomenon is characteristic in children from different cultures and socio-economic contexts ( Posada et al., 1995a)., Posada et al. (1995) examined mothers and toddlers from China, Colombia, Germany, Israel, Japan, and the United States on what constitutes a securely attached child.How did these mothers describe an "ideally secure" child?.