Your roommate or spouse complains that you are not a good comparison shopper: you tend not to realize that big-looking bottles and cans so not necessarily hold more than smaller, more compact ones. "deceptive packaging! " your roommate/spouse says. "read the labels and don’t pay more for less." the characteristic of preoperational thought that is evident in your behavior is your inability to apply

Conservation

Explanation:

In psychology conservation is the ability that people have that helps us discern that a certain volume remains constant even if the same volume is placed in a larger container. This concept was proposed by Jean Piaget.

Here, I am unable to discern that even when the packaging is bigger the volume of the substance inside the package remains the same.

Hence, I was unable to apply my ability of conservation.

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.