14. While at the doctor's office, Jason's hearing was tested. On certain trials, he indicated that he heard a soft tone. On other trials, he indicated that he did not hear a soft tone, even though the...

14.
While at the doctor's office, Jason's hearing was tested. On certain trials, he indicated that he heard a soft tone. On other trials, he indicated that he did not hear a soft tone, even though the doctor assured him that a tone was presented. In this example, the doctor was most likely testing Jason's ____________.