SOLVED

21) The lowest intensity of a particular stimulus that enables the average person to detect that stimulus 50 percent of the time it is presented is called the a. absolute threshold. b. range threshold. c. difference threshold. d. noticeable threshold. 22) The smallest amount of a particular stimulus required to produce any sensation at all in the person to whom the stimulus is presented is the a. absolute threshold. b. range threshold. c. difference threshold. d. noticeable threshold. 23) The lowest stimulus intensity required for detection is the ______ and the smallest change in stimulus intensity that we can detect is the ___________. a. absolute threshold; just noticeable difference. b. base value; just noticeable difference. c. response criterion; sensory constant. d. difference threshold; absolute threshold. 24) The principle that the just noticeable difference of any given sense is a constant fraction or proportion of the stimulus being judged is called a. the opponent-process principle. b. the doctrine of specific nerve energies. c. the phi phenomenon. d. Weber’s law. 25) When Ann went to her doctor, he gave her a hearing test. During the test, the doctor presented a series of tones to Ann through earphones. The tones started at a low intensity and then became louder. The doctor asked Ann to raise her hand whenever she started to hear a sound. The doctor was testing Ann’s a. auditory convergence. b. absolute threshold. c. refractory threshold. d. difference threshold. 26) Weber’s law provides a formulation that is used to determine the a. largest detectable stimulus. b. smallest detectable stimulus. c. largest detectable difference between two stimuli. d. smallest detectable difference between two stimuli. 27) Alicia is talking on her cell phone to her friend Maya. If Maya is in a crowded subway terminal, Alicia finds that she has to nearly shout for Maya to be able to hear her. However, when Maya is in a meadow on her grandparents’ farm she can easily tell what Alicia is watching on TV as they talk. This is one illustration of a. the just noticeable difference. b. transduction. c. absolute threshold. d. signal-to-noise ratio. 28) Julian is getting his eyes tested, and the doctor asks him to indicate when the image on the screen gets brighter or darker than it was previously. The doctor is trying to determine Julian’s a. absolute threshold. b. adaptation threshold. c. just noticeable difference. d. signal detection. 29) According to signal detection theory, a ___________ is when a stimulus is absent, but the participant indicates that it was present. a. true positive b. false negative c. false positive d. true negative 30) According to signal detection theory, a ___________ is when a stimulus is present but the participant indicates that it was absent. a. true positive b. false negative c. false positive d. true negative