Required practical - Investigating reaction times (AQA GCSE Biology Combined Science): Flashcards
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10 cards from this deck
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Practise the cards
10 cards from this deck
Definition of reaction time
Definition of reaction time
The time for nervous system to detect stimulus and respond
Main aim of reaction time practical
Main aim of reaction time practical
Investigate effect of practice on human reaction times
Which hand to use in ruler drop test
Which hand to use in ruler drop test
Weaker hand (non-dominant)
Number of times to repeat ruler drop
Number of times to repeat ruler drop
Ten times
Starting position of ruler (cm mark)
Starting position of ruler (cm mark)
0 cm mark level with top of thumb
Formula: reaction time from distance
Formula: reaction time from distance
gives time in ms
Sig figs for final reaction time answer
Sig figs for final reaction time answer
2 significant figures
Effect of practice on reaction times
Effect of practice on reaction times
Practice usually improves them - people get faster
Why ruler falls in reaction time test
Why ruler falls in reaction time test
Gravity causes constant acceleration
Practice before starting experiment?
Practice before starting experiment?
No - don't practice before starting