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If I present a signal on every trial, but sometimes it's really weak and sometimes it's really strong, then I measure your ability to detect the signal...a- I can get you to say "yes" (the signal is present) more even if you didn't see it by telling you I'll reward you each time you spot it.b- I can get you to say "no" (the signal is not present) more even if you think you might see it but you're not sure by telling you I'll punish you for wrong answers.c- Neither A nor Bd- Both A & B

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