When Jason practices the drums, he tends not to hear the phone. Today he is expecing a call from a record producer and answers teh phone each time it rings even when he is practicing the drums. What explains why Jason hears the phone today?
Signal Detection Theory. ( a means to quantify the ability to discern between signal and noise. According to the theory, there are a number of determiners of how a detecting system will detect a signal, and where its threshold levels will be.)