Developmental Timeline Essay Example | Topics and Well Written Essays - 500 words

Developmental Timeline - Essay Example The final stage is the formal operational stage and this stage goes from the age of 12 and ends at death. In this stage, children can think articulately about concrete objects and they have a strong sense of reasoning. There are also substages to these stages. The first substage to the sensorimotor stage is from the ages of birth to one month and it occurs through reflexes like grasping and sucking. In this stage knowledge is acquired through these reflexes. Substage 2 happens from the ages of 1 to 4 months. Reflexes are organized into larger more complex behaviours where behaviours like grabbing a rattle to suck occurs. Substage 3 occurs from the ages of 4 to 8 months where repetition of actions causes pleasing or interesting things to happen as in the case of banging a rattle. Substage 4 occurs from the ages of 8 to 12 months. This occurs when objects can be imagined with the mind even when they are out of sight. Substage 5 occurs from the ages of 12 to 18 months where an object is used in a variety of ways. For example, banging a spoon against a high chair.