Psych 230- (UIUG) EXAM
Complete Questions and Answers
A+ Already Graded
1) Two point threshold - ANSWER the minimum distance at
which two stimuli are just perceptible as separate
2) Just Noticeable Difference (JND) - ANSWER the minimum
difference necessary to tell two stimulus apart
3) ...
Psych 230- (UIUG) EXAM
Complete Questions and Answers
A+ Already Graded
1) Two point threshold - ANSWER ✔ the minimum distance at
which two stimuli are just perceptible as separate
2) Just Noticeable Difference (JND) - ANSWER ✔ the minimum
difference necessary to tell two stimulus apart
3) Absolute threshold - ANSWER ✔ the minimum stimulation
needed to detect a particular stimulus 50 percent of the time
4) Weber's Law - ANSWER ✔ Larger stimulus values have greater
JNDs, Smaller stimulus values have smaller JNDs
5) Fechner's Law - ANSWER ✔ The magnitude of subjective
sensation increases proportionally to the logarithm of the stimulus
intensity
6) Stevens power law - ANSWER ✔ The relation between physical
intensity and psychological intensity is linear
7) Method of constant stimuli - ANSWER ✔ many stimuli, ranging
from rarely to almost always perceivable are presented one at a
time
8) Method of limits - ANSWER ✔ The magnitude of a single
stimulus or the difference between two stimuli is varied
incrementally until the participant responds differently
, 9) Method of adjustment - ANSWER ✔ Similar to method of limits,
but participant controls the stimulus directly
10) Magnitude Estimation - ANSWER ✔ the participant assigns
values according to perceived magnitudes of the stimuli
11) Cross Modality Matching - ANSWER ✔ matches magnitude
between two stimuli (ex: visual and auditory)
12) Sensation - ANSWER ✔ The ability to detect a stimulus and
perhaps turn that detection into a private experience
13) Perception - ANSWER ✔ The act of giving meaning to a
detected sensation
14) Psychophysics - ANSWER ✔ The science of defining
quantitative relationships between physical and psychological
events
15) Signal Detection Theory - ANSWER ✔ A psychophysical
theory that quantifies the response of an observer to the
presentation of a signal in the presence of a noise - distinction
between an observers ability to perceive a signal and willingness to
report it
16) Signal Detection Theory Hit - ANSWER ✔ Stimulus is
present and observer responds "yes"
17) Signal Detection Theory Miss - ANSWER ✔ Stimulus is
present and observer responds "no"
18) Signal Detection Theory False Alarm - ANSWER ✔
Stimulus is not present and observer responds "Yes"
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