This therefore shows that the ability to form mental representations well, can lead to a stronger attachment therefore social competence.
The age at which object permanence begins is an enigma, although Piaget’s theory does take into account individual differences can alter the age at which the stages happen, some researchers have found object in permanence in children much younger than the 9 month bracket (Baillargeon, 1987). During the observations the infants visual display of emotion (e.g. surprise) would be used to analyse the expectation that the object will appear (Brian & Mukherji, 2005), thus confirming the infant can produce mental representations of the object. It may be that infants below the age of 8/9 months may not be able to reflect these emotions and therefore it is assumed they do not display object permanence. It can also be criticised as it requires the infant to have the motor-skills to search for the toy, however