Brief case study

Read through the following brief case study and then go to the Diagnostic Statistical Manual (DSM) to identify which mental disorder the client may be exhibiting symptoms of. Once you have identified the disorder from the DSM give a brief description of the disorder and how the client’s symptoms connect. Then go to the Mental Measurements Yearbook (MMY) and select any test that you think would be appropriate to assist in the diagnosis of the client. Give a brief explanation of the test and why you have selected it. 
Case Study: 
Samuel is a 22-year-old psychology student at a local university. He has gone out with his friends on and off for social events but he does not have any alcohol or drug abuse history. He does have an uncle who has had some psychiatric evaluations in the past but no present family members have any mental issues. He is stressed with classes but not more than his friends. Over the past few weeks his friends and family have noticed strange behaviors. On several occasions they overheard him whispering in an agitated voice, and no one was nearby him. He has started to refuse to answer his phone or make any calls on his phone. He has stated that he will not use his phone because he thinks this will activate a chip that an alien has placed in his brain. He has stopped attending all his classes and is near failing them if something doesn’t change very soon. His parents and friends have been trying unsuccessfully to get him to seek a psychiatric evaluation. He in turn has accused them of conspiring with the alien to kill him so they can take his brain. 
Source: http://libguides.kean.edu/?b=s