Difference between revisions of "GCSE Biology Required Practical: Factors affecting Human Reaction Time"
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Investigate a factor affecting [[human]] reaction time. | Investigate a factor affecting [[human]] reaction time. | ||
===Method=== | ===Method=== | ||
| − | *[[Independent Variable]] - | + | Investigate whether practice can improve [[human]] reaction time. |
| − | *[[Dependent Variable]] - | + | *[[Independent Variable]] - Amount of practice. |
| − | *[[Control Variable]]s - | + | *[[Dependent Variable]] - Reaction time. |
| − | # | + | *[[Control Variable]]s - The same person being tested. The same person administering the test. |
| + | |||
| + | #The subject places the forearm on a table with the hand hanging over the edge. | ||
| + | #A second person holds a metre ruler from the very top and allow it to hang from their fingers with the 0cm mark level with the top of the subject's hand. | ||
| + | #The subject holds their index finger and thumb apart allowing the ruler to fall between them. | ||
| + | #The second person gives no warning before dropping the ruler. | ||
| + | #The subject catches the ruler as quickly as possible between the thumb and index finger. | ||
| + | #Record the length of ruler that has passed through the subject's hand in metres. | ||
| + | #Convert the distance into reaction time with the following formula: | ||
| + | <math>t={{sqrt|0.2 /times d}} | ||
| + | : Where t is the time and d is the distance the ruler has travelled. | ||
Revision as of 16:31, 22 November 2018
Key Stage 4
Meaning
Investigate a factor affecting human reaction time.
Method
Investigate whether practice can improve human reaction time.
- Independent Variable - Amount of practice.
- Dependent Variable - Reaction time.
- Control Variables - The same person being tested. The same person administering the test.
- The subject places the forearm on a table with the hand hanging over the edge.
- A second person holds a metre ruler from the very top and allow it to hang from their fingers with the 0cm mark level with the top of the subject's hand.
- The subject holds their index finger and thumb apart allowing the ruler to fall between them.
- The second person gives no warning before dropping the ruler.
- The subject catches the ruler as quickly as possible between the thumb and index finger.
- Record the length of ruler that has passed through the subject's hand in metres.
- Convert the distance into reaction time with the following formula:
<math>t=Template:Sqrt
- Where t is the time and d is the distance the ruler has travelled.