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Chapter 16 Multiple choice questions
Quiz Content
*
not completed
.
Calculate d' for a yes/no condition in which there were a total of 83 hits out of 90 signal present trials and 8 correct rejections out of 10 signal absent trials.
1.42
correct
incorrect
0.84
correct
incorrect
0.58
correct
incorrect
2.26
correct
incorrect
*
not completed
.
What is the bias (C) for the scenario described in Question 1?
-0.29
correct
incorrect
0.29
correct
incorrect
-1.13
correct
incorrect
1.13
correct
incorrect
*
not completed
.
Calculate d' for a 2AFC experiment in which 81% of trials were correct.
0.88
correct
incorrect
1.24
correct
incorrect
1.76
correct
incorrect
1.15
correct
incorrect
*
not completed
.
What is the d' value for a 2AFC experiment in which 75 trials out of 75 were correct?
1
correct
incorrect
0
correct
incorrect
Infinity
correct
incorrect
Not-a-number
correct
incorrect
*
not completed
.
Approximately how many trials were correct in a 2AFC experiment where d' = 0.7, and there were 208 trials in total?
143
correct
incorrect
70
correct
incorrect
146
correct
incorrect
158
correct
incorrect
*
not completed
.
For a yes/no experiment in which 40/50 signal present trials were correct, what was the false alarm rate if d' = 0.6?
0.24
correct
incorrect
0.84
correct
incorrect
0.59
correct
incorrect
0.73
correct
incorrect
*
not completed
.
Use the dprime.mAFC function from the psyphy package to calculate d' for a 9AFC experiment in which 55% of trials were correct.
0.18
correct
incorrect
0.72
correct
incorrect
1.17
correct
incorrect
1.56
correct
incorrect
*
not completed
.
In a yes/no task, participant 1 gets 72 out of 90 signal present trials correct and 33 out of 45 signal absent trials correct. Participant 2 gets 78 out of 90 signal present trials correct, and 26 out of 45 signal absent trials correct. Which participant is more sensitive?
Participant 1
correct
incorrect
Participant 2
correct
incorrect
Both are equally sensitive
correct
incorrect
We cannot tell without knowing the false alarm rate as well
correct
incorrect
*
not completed
.
For the scenario described in Question 8, which participant is more biased?
Participant 1
correct
incorrect
Participant 2
correct
incorrect
Both are equally biased
correct
incorrect
The participants show the same amount of bias in opposite directions
correct
incorrect
*
not completed
.
An experiment samples two points on an ROC curve as follows:
Point 1: hits = 0.8, false alarms = 0.4
Point 2: hits = 0.4, false alarms = 0.15
What is the most likely value of d'?
1.09
correct
incorrect
0.78
correct
incorrect
0.94
correct
incorrect
0.86
correct
incorrect
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