PSYC 230 UIUC EXAM 1 (ACTUAL 2025/2026) QUESTIONS
WITH 100% VERIFIED CORRECT SOLUTIONS
Perception
the process of organizing and interpreting sensory information, enabling us to
recognize meaningful objects and events
Are there really 5 senses?
No, there are from 7-12 different senses
neural transduction
receptors, transduction and neural response
Sensation
activation of sensory receptors due to a stimulus in the environment (physical
stimulus---->neural signal)
Miss
Signal Present
Signal not detected
False Alarm
Signal not present
,Signal detected
Correct Rejection
signal not present, signal not detected
receiver operating Characteristic (ROC)
In a signal detection experiment, a curve representing the quality of a
participant's performance
Changes in criterion
shift to left=value is smaller and the observer will respond that the signal is
present more of the time (more false alarms)
shift to the right=value is larger and the observer will be less likely to respond
that the signal was present
Differences in sensitivity (d prime)
difference between the means of the Signal Present and Signal Absent
distributions
Mechanoreceptors
Sensory receptors responsible for sensing distortion in body tissues
SAI mechanoreceptors (slow)
, detection of patterns, texture perception
-rufini
SAII mechanoreceptors (slow)
detect stretching of the skin; are fingers shaped properly?
-merkel
FAI mechanoreceptors (fast)
respond to low frequency vibrations ---> adjust grip
-meissner
FAII mechanoreceptors (fast)
when objects make contact with our skin
-pacinian
Thermoreceptors
detect changes in temperature (cold and warm fibers)
kinesthetic receptors
Mechanoreceptors in muscles, tendons, and joints
Play an important role in sense of where limbs are, what kinds of movements
are made
WITH 100% VERIFIED CORRECT SOLUTIONS
Perception
the process of organizing and interpreting sensory information, enabling us to
recognize meaningful objects and events
Are there really 5 senses?
No, there are from 7-12 different senses
neural transduction
receptors, transduction and neural response
Sensation
activation of sensory receptors due to a stimulus in the environment (physical
stimulus---->neural signal)
Miss
Signal Present
Signal not detected
False Alarm
Signal not present
,Signal detected
Correct Rejection
signal not present, signal not detected
receiver operating Characteristic (ROC)
In a signal detection experiment, a curve representing the quality of a
participant's performance
Changes in criterion
shift to left=value is smaller and the observer will respond that the signal is
present more of the time (more false alarms)
shift to the right=value is larger and the observer will be less likely to respond
that the signal was present
Differences in sensitivity (d prime)
difference between the means of the Signal Present and Signal Absent
distributions
Mechanoreceptors
Sensory receptors responsible for sensing distortion in body tissues
SAI mechanoreceptors (slow)
, detection of patterns, texture perception
-rufini
SAII mechanoreceptors (slow)
detect stretching of the skin; are fingers shaped properly?
-merkel
FAI mechanoreceptors (fast)
respond to low frequency vibrations ---> adjust grip
-meissner
FAII mechanoreceptors (fast)
when objects make contact with our skin
-pacinian
Thermoreceptors
detect changes in temperature (cold and warm fibers)
kinesthetic receptors
Mechanoreceptors in muscles, tendons, and joints
Play an important role in sense of where limbs are, what kinds of movements
are made
