User`s guide

E-Prime User’s Guide
Appendix A: Timing Test Results
Page A-16
ACTUAL KEYBOARD RESPONSE DELAY BY VARYING INTERVAL (SINGLE FRAME)
Varying Interval (ms)
+1 +2 +3 PRIMES Grand Total
Average of ACTUAL DELAY
6.311 6.483 6.686 5.921 6.450
StdDev of ACTUAL DELAY
0.714 0.835 0.715 0.816 0.787
Min of ACTUAL DELAY
4.806 4.802 5.800 4.806 4.802
Max of ACTUAL DELAY
7.813 7.816 7.816 7.627 7.816
N (Num of Intervals)
100 100 100 25 325
ACTUAL KEYBOARD RESPONSE DELAY BY FIXED INTERVAL (MULTI FRAME)
Fixed Interval (ms)
1 100 10000 Grand Total
Average of ACTUAL DELAY
6.600 6.594 7.906 6.603
StdDev of ACTUAL DELAY
0.820 0.867 0.739 0.848
Min of ACTUAL DELAY
4.802 4.803 6.817 4.802
Max of ACTUAL DELAY
8.808 13.805 9.815 13.805
Count of ACTUAL DELAY
1000 1000 10 2010
ACTUAL KEYBOARD RESPONSE DELAY BY VARYING INTERVAL (MULTI FRAME)
Varying Interval (ms)
+1 +2 +3 PRIMES Grand Total
Average of ACTUAL DELAY
6.786 6.709 6.706 6.600 6.723
StdDev of ACTUAL DELAY
0.738 0.683 0.748 0.697 0.720
Min of ACTUAL DELAY
5.801 5.800 5.627 5.801 5.627
Max of ACTUAL DELAY
7.816 7.816 7.815 7.812 7.816
Count of ACTUAL DELAY
100 100 100 25 325
3b. Mouse Response Test – This test creates a simulated subject response on the mouse
device. The TS computer plays the role of a subject, as well as that of a recording device. The
TS computer monitors the display with a photo-diode sensor. When it detects a stimulus, it
delays for a preset duration, and then toggles a bit, which activates a reed relay. This, in turn,
activates a modified mouse, as if a subject had pressed a key. This test is run via both single
frame and multi-frame stimulus presentations in E-Prime. The sample data shows that a
common mouse is not typically a valid device to use for precision reaction time experiments (e.g.,
both the average delay and standard deviation is generally too high to be considered valid for RT
experiments). The mouse can be used as an input device, but should only be used for RT
experiments in which millisecond timing precision is not required.
ACTUAL MOUSE RESPONSE DELAY BY FIXED INTERVAL (SINGLE FRAME)
Fixed Interval (ms)
1 100 10000 Grand Total
Average of ACTUAL DELAY
91.380 92.726 95.705 92.071
StdDev of ACTUAL DELAY
8.439 8.121 5.131 8.297
Min of ACTUAL DELAY
83.802 82.809 87.805 82.809
Max of ACTUAL DELAY
247.802 108.811 102.817 247.802
N (Num of Intervals)
1000 1000 10 2010