Answer: The type of development that researchers are most likely to be studying is <em>cognitive development</em>.
Explanation:
This development focuses on problem solving, construction of thought processes, remembering, among others. This is followed from a person's childhood to their adulthood.
There are approximately 4 stages of this development in childhood. The stages are formal, concrete, sensorimotor, and preoperational. These are crucial things for a child to develop.
A few examples of impaired cognitive development are listed below:
1.) Having to read directions several times before understanding.
2.) Making mistakes frequently and having trouble when multitasking
3.) The person is easily distracted
4.) Having trouble learning to read
5.) It takes longer to do tasks and having trouble concentrating.