May be a matter of opinion depending on your teacher but genetics, trauma, and chemical imbalances are generally the main causes.
Answer:
true
Explanation:
they have to get comfortable in a new environment, get used to new faces, etc
Answer:
Longitudinal design
Explanation:
There are different types of quasi experimental design in research & experimental psychology.
However, in this case the answer will be longitudinal research design because the same children were studied for 2 years. And this corresponds to longitudinal design which is a study that is aimed at same individual or same group of people over a period of time.