Marcus has Attention Deficit Disorder and is very easily distracted in the classroom. This is particularly problematic when he has to maintain sustained concentration, such as when taking a test. He is most likely to need which test-taking accommodation:

Setting Accomodation

Explanation:

Test accommodation are often describes as modification of test taking, in which the situations make rooms for students with one form of disabilities to show their knowledge and skills in testing situations.

Such disabilities includes:

1. Physical disabilities

2. Leaning disabilities

3. Limitations in language disabilities

In this case, Marcus, who is suffering from Attention Deficit Disorder, which is part of learning disability, will need a "Setting accommodation" type of test taking to demonstrate his skills and knowledge. This is because, in this testing conditions, the location which is classroom, will be changed to a very quite but not disturbing place, and the length of time will be changed or increased in relation to conventional testing time.

Answer: Setting

Explanation: Accommodation in this context is a part of the human cognition or learning process which involves tweaking or modifying encoding method or principle in other to accept or learn new information.

The process of accommodation are usually divided into;

Presentation accommodation: Involves tweaking or modifying the process in which assessment or assignment is disseminated. It could be visual, audio, audiovisual or other methods of presentation.

Response accommodation : involves allowing other problem solving practices.

Timing accommodation: This has to do with changing the duration allowable for assignment or assessment.

Setting accommodation involves changing or modifying the appearance, location or condition of the classroom to aid concentration level and reduce distraction.