These authors asked both parents of 600 children (47 % boys, 53 % girls) 7 to 15 years of age (M = 10.9, SD = 1.8), who were recruited
on the
basis of a stratified
random sampling procedure (for a detailed discussion, see Van Leeuwen et al., 2004), to independently complete a series of
questionnaires, covering parenting behavior, child problem behavior, and child and parent personality.