The text states that there has been a gradual evolution in how mental retardation is regarded. In general, what change is at the center of that evolution in thinking?
◦ Today, each person is considered to be more an individual with specific needs for accommodations.
◦ Today, mental retardation is considered to be a biological, rather than a psychological, disability.
◦ Today, mental retardation is diagnosed according to a person's IQ score, rather than to an assessment of that person's abilities.
◦ Today, people understand that individuals with mental retardation cannot be expected to achieve at the same levels as people who do not have intellectual disabilities.