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13 cards from this deck
Measure & investigate factors affecting human reaction time
30 cm
In line with top of subject's thumb and forefinger
Releases ruler without warning
Distance in cm where ruler was caught
To calculate average distance ruler fell
Reaction time
Counting backward (mental task)
Reaction time (calculated from ruler drop distance)
Same ruler used, consistent height ruler is held
Which factors had significant effect on reaction time
Driving
Use digital timer
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