SHS 311 Final Exam Questions With Correct
Answers
What |are |objective |psychophysics? |- |CORRECT |ANSWER✔✔-Measure |of |what |a |listener |can |
hear. |Detection, |discrimination, |recognition. |Loudness, |localization, |pitch |perception
What |are |subjective |psychophysics? |- |CORRECT |ANSWER✔✔-Measure |of |what |a |listener |does |
hear. |Sensory |scaling |and |matching.
What |are |absolute |thresholds? |- |CORRECT |ANSWER✔✔-minimal |amount |of |stimulation |that |
can |be |detected
What |are |difference |thresholds? |- |CORRECT |ANSWER✔✔-lowest |level |of |stimulation |required |
to |sense |that |a |change |in |stimulation |has |occurred
What |is |the |limitation |of |classical |objective |psychophysical |tasks? |- |CORRECT |ANSWER✔✔-The
|threshold |is |suppose |to |represent |a |measure |of |the |sensitivity |(e.g., |of |the |auditory |system) |
to |the |changed |stimulus |parameter |(e.g., |stimulus |level |or |frequency), |but |the |classical |
methods |do |not |take |response |bias |into |consideration. |Response |bias |is |when |situations |that |
are |not |associated |with |sensitivity |(expectations, |experience, |and |instructions) |affect |the |
listener's |tendency |to |choose |one |response |or |the |other, |and |affect |the |measure |threshold.
What |is |a |psychometric |function? |- |CORRECT |ANSWER✔✔-Psychometric |functions |relate |a |
measure |of |listener's |performance |(e.g., |percent |of |time |that |a |stimulus |is |detected) |to |a |
measure |of |the |stimulus |(e.g., |stimulus |intensity |level).
, How |is |threshold |computed |on |a |psychometric |function? |- |CORRECT |ANSWER✔✔-Thresholds |
are |derived |from |psychometric |functions |at |the |level |at |which |the |stimulus |is |detected |50% |of |
the |time
What |is |a |hit? |- |CORRECT |ANSWER✔✔-patient |says |yes |and |signal |was |present |(correct |
detection)
What |is |a |Miss? |- |CORRECT |ANSWER✔✔-patient |says |no |and |signal |was |present |(incorrect |
rejection)
What |is |a |false |alarm? |- |CORRECT |ANSWER✔✔-patient |says |yes |and |signal |wasn't |present |
(incorrect |detection)
What |is |a |correct |rejection? |- |CORRECT |ANSWER✔✔-patient |says |no |and |there |is |no |signal |
present
How |do |you |compute |percent |correct |P(C) |based |on |the |information |in |a |stimulus-response |
table? |- |CORRECT |ANSWER✔✔-P[C] |= |(Hit |Rate |+ |Correct |Rejection |Rate) |/ |2
What |is |an |ROC? |- |CORRECT |ANSWER✔✔-receiver |operator |characteristics
| The |Hits |vs. |False |Alarms |are
plotted |on |an |ROC |curve
What |measure |can |be |derived |from |the |ROC |function |that |indicates |a |bias-free |measure |of |
sensitivity? |- |CORRECT |ANSWER✔✔-Each |ROC |curve |represents |a |different |Sensitivity, |while |
points |on |an |ROC |curve |represent |different |Response |Bias. |Thus, |a |measure, |like |the |area |
under |an |ROC |curve, |is |a |measure |of |Sensitivity |that |does |not |change |with |Bias.
What |are |the |Minimum |Audible |Field |(MAF) |measures |of |the |thresholds |of |hearing? |- |
CORRECT |ANSWER✔✔-The |minimum |detectable |level |of |a |sound |is |measured |at |the |position |
Answers
What |are |objective |psychophysics? |- |CORRECT |ANSWER✔✔-Measure |of |what |a |listener |can |
hear. |Detection, |discrimination, |recognition. |Loudness, |localization, |pitch |perception
What |are |subjective |psychophysics? |- |CORRECT |ANSWER✔✔-Measure |of |what |a |listener |does |
hear. |Sensory |scaling |and |matching.
What |are |absolute |thresholds? |- |CORRECT |ANSWER✔✔-minimal |amount |of |stimulation |that |
can |be |detected
What |are |difference |thresholds? |- |CORRECT |ANSWER✔✔-lowest |level |of |stimulation |required |
to |sense |that |a |change |in |stimulation |has |occurred
What |is |the |limitation |of |classical |objective |psychophysical |tasks? |- |CORRECT |ANSWER✔✔-The
|threshold |is |suppose |to |represent |a |measure |of |the |sensitivity |(e.g., |of |the |auditory |system) |
to |the |changed |stimulus |parameter |(e.g., |stimulus |level |or |frequency), |but |the |classical |
methods |do |not |take |response |bias |into |consideration. |Response |bias |is |when |situations |that |
are |not |associated |with |sensitivity |(expectations, |experience, |and |instructions) |affect |the |
listener's |tendency |to |choose |one |response |or |the |other, |and |affect |the |measure |threshold.
What |is |a |psychometric |function? |- |CORRECT |ANSWER✔✔-Psychometric |functions |relate |a |
measure |of |listener's |performance |(e.g., |percent |of |time |that |a |stimulus |is |detected) |to |a |
measure |of |the |stimulus |(e.g., |stimulus |intensity |level).
, How |is |threshold |computed |on |a |psychometric |function? |- |CORRECT |ANSWER✔✔-Thresholds |
are |derived |from |psychometric |functions |at |the |level |at |which |the |stimulus |is |detected |50% |of |
the |time
What |is |a |hit? |- |CORRECT |ANSWER✔✔-patient |says |yes |and |signal |was |present |(correct |
detection)
What |is |a |Miss? |- |CORRECT |ANSWER✔✔-patient |says |no |and |signal |was |present |(incorrect |
rejection)
What |is |a |false |alarm? |- |CORRECT |ANSWER✔✔-patient |says |yes |and |signal |wasn't |present |
(incorrect |detection)
What |is |a |correct |rejection? |- |CORRECT |ANSWER✔✔-patient |says |no |and |there |is |no |signal |
present
How |do |you |compute |percent |correct |P(C) |based |on |the |information |in |a |stimulus-response |
table? |- |CORRECT |ANSWER✔✔-P[C] |= |(Hit |Rate |+ |Correct |Rejection |Rate) |/ |2
What |is |an |ROC? |- |CORRECT |ANSWER✔✔-receiver |operator |characteristics
| The |Hits |vs. |False |Alarms |are
plotted |on |an |ROC |curve
What |measure |can |be |derived |from |the |ROC |function |that |indicates |a |bias-free |measure |of |
sensitivity? |- |CORRECT |ANSWER✔✔-Each |ROC |curve |represents |a |different |Sensitivity, |while |
points |on |an |ROC |curve |represent |different |Response |Bias. |Thus, |a |measure, |like |the |area |
under |an |ROC |curve, |is |a |measure |of |Sensitivity |that |does |not |change |with |Bias.
What |are |the |Minimum |Audible |Field |(MAF) |measures |of |the |thresholds |of |hearing? |- |
CORRECT |ANSWER✔✔-The |minimum |detectable |level |of |a |sound |is |measured |at |the |position |
