Jacinta, the mother of a 10-month-old baby boy, is concerned about her son's increasing fussiness when she leaves him with his babysitter each morning.
In this scenario, the baby is showing separation distress because his RECOGNITION memory is improving during this period.
Babies don't seem to be solely growing physically throughout the primary two years of life, however additionally cognitively (mentally). daily whereas they act with and study their setting they're making new connections and pathways between nerve cells each among their brains, and between their brains and bodies. whereas physical growth and alter is definitely ascertained and measured in precise terms like in inches and pounds, psychological feature modification and development could be a very little more durable to see as clearly.
Therefore, a lot of regarding what consultants understand mental and psychological feature development relies on the careful observation of biological process theorists and their theories, like Piaget's theory of psychological feature development and Erickson's psycho-social stages.