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A new handheld device purports to determine the severity of concussions by readi

游客2024-01-12  57
问题 A new handheld device purports to determine the severity of concussions by reading the brain’s electrical signals and comparing them to a database of 15,000 scans compiled at a brain research lab. The device is intended to help doctors decide whether an athlete who has received a blow to the head during a competition should be sent back into the game.
Which of the following would it be most useful to establish in order to evaluate the effectiveness of the device for its intended purpose?
选项 A、Whether the database of brain scans will regularly be updated with new scans
B、Whether by use of this device doctors will be able to make a sound decision about whether to allow an athlete back into the competition before it ends
C、Whether the device will be endorsed by a large number of medical professionals
D、Whether the database includes scans of non-injured athletes in the same game as the injured athlete
E、Whether team doctors have until now been mistaken in their assessments of whether an athlete can safely continue to play
答案 B
解析 Which one of the answer choices would most help in determining whether the device is effective for its intended purpose ?
A handheld scanning device has been developed to read brain signals and determine the severity of a concussion. The intended purpose of this device is to help doctors decide whether an athlete who has received a blow to the head during competition can be allowed back into the game.
A    If the database is regularly updated, it might increase the effectiveness of the device in the future. This is not relevant to answering whether the device will help doctors make medical decisions during games.
B    Correct. If the answer is yes, then the device is effective for its intended purpose. If the answer is no, then the device is not effective for its intended purpose: to help doctors make sound decisions about whether athletes who have suffered a head blow can safely resume play during a game.
C    Endorsement by medical professionals might help marketing of the device, but  it is not directly relevant to deciding whether the device is technically suitable for its intended purpose. Simply being a medical professional does not necessarily make me an expert on such issues; that is, medical professionals in general are not involved in deciding whether athletes who have received a head blow in a game can safely resume play in the game.
D    In order to be technically useful, the database would have to be representative of functioning brains in a variety of activities. This includes both normally functioning brains and abnormally functioning brains. Note that even if this condition is met, it would not be sufficient to decide on whether the device is adequate for its intended purpose.
E    Previous mistakes by team doctors implies a genuine need for the device. However， this issue is separate from the issue of whether the device itself can help doctors make sound decisions. That is, while such a device may be needed, it is possible that this particular device still does not effectively help doctors make the decision to send athletes back into the game.
The correct answer is B.
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