Background: Clinical heterogeneity of autism likely hinders efforts to find genes associated with this complex psychiatric disorder. Some studies have produced promising results by restricting the sample according to the expression of specific familial factors or components of autism. Previous factor analyses of the restricted, repetitive…

Background: Childhood sleep problems which are prevalent in Western societies are associated with a wide range of emotional, cognitive and behavioural disturbances. Growing evidence suggests that parents play a pivotal role in children's sleep behaviour and that a parenting style which promotes self-regulation is beneficial. This study tested a…

Offers evidence supporting a model of bidirectional effects: the mother initiates maltreatment, but both mother and infant sustain the situation by their behaviors. Maltreated infants did not differ from controls in congenital characteristics, but displayed deviance in learned behavior patterns. Infants showed behavioral improvement after…