Wayne’s father hung a bright yellow tennis ball over his crib and dangled it whenever he stood by him. within a day or two of doing this, wayne was seen kicking his legs in the air to reach the ball successfully. wayne’s action is an example of the substage given by piaget.

coordination of secondary circular reactions          

Explanation:

Given by Jean Piaget in his child developmental theory.

The sensorimotor stage consists of six sub-stages that lasts from birth to twenty-four months of age.

Sub-stages:

1. Reflexes.

2. Primary circular reactions.

3. Secondary circular reactions.

4. Coordination of reactions.

5. Tertiary circular reactions.

6. Early representational thought.

Secondary Circular Reactions: This sub-stage lasts from four to eight months. In this sub-stage, the child focuses on the world and repeats an action that triggers a response intentionally in the environment. In short, they are involved in pleasurable activities that come either from an object or from their bodies.

no , per capita income is not a true measure of the development because: -it only tells us about average income not how income is distributed among the people.it only give us an idea of the economic aspect.it is only at the qualitative basis.moreover, income is not only the way of development other factors are also as much as important as income.