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Computer ruler9/2/2023 The program places a semi-transparent ruler on the computer screen on startup. The portable program can display up to ten rulers on the screen, of which all can be configured individually. For example, if we were investigating the effects of tiredness on reaction times, we would not want the individual being tested to have consumed any substances that we are not testing for (caffeine or alcohol) between the first test and the second test this is because the consumption of other substances will influence the individual’s reaction time.Yoshida Rulers is an application that supports all of this, and more. Also, we would need to make sure that the individual is in the same state ignoring what we are changing/ investigating. For example, we would need to use the same table, the same ruler etc. Tiredness – we can investigate the effect that tiredness has on reaction times by completing one experiment during the day and the second experiment in the evening (such as 10 pm) when an individual will feel more tired. Tiredness will increase reaction times – it will make reaction times longer.įor all of the modifications above, we would only change one variable and keep all of the other variables constant (the same).Obviously, we should only investigate the effects of alcohol on individuals who are over the drinking age above 18 in the UK. Alcohol will increase reaction times – it will make reaction times longer. Alcohol – we can investigate the effect of alcohol on reaction times by carrying out the experiment again 15-30 minutes after an individual has consumed an alcoholic beverage (we wait 15-30 minutes because it takes a while for alcohol to have an effect on the body).We then wait 15 minutes and then compete the experiment again (we wait 15 minutes because it takes a while for the caffeine from the drink to have an effect on the body). Caffeine should decrease reaction times – it will make reaction times faster. Caffeine – we can investigate the effect of caffeine on reaction times by giving an individual a caffeinated drink, such as a coffee, energy drink or cola.Here are some of the factors that we can investigate to see what affect they have on reaction times we only make these changes for the second test – the first test will be the control. We then compare the results from the two experiments to see what affect the factor has on reaction time. We can investigate how different factors affect reaction times by completing the experiment twice the first time will be the control test, and the second time will be where we change a factor that may affect reaction time. Investigating What Affects Reaction Times The aim of the first calculation is to find the final velocity of the ruler by using the formula below. We are now going to work out the reaction time for this. ![]() Let’s suppose that I completed the experiment a few times and the mean distance that I caught the ruler was 25 centimetres. We can calculate the reaction time by using two different formulas. The experiment so far has given us a value for distance and not reaction time. The more repeats that we undertake, the more reliable our results will be. We repeat the experiment a few times and work out the mean. A higher number means that the individual caught the ruler more slowly, thus meaning that they have a slower reaction time. A smaller number means that the individual caught the ruler quicker and therefore has a faster reaction time. We record the number on the ruler where the thumb and index finger are when they caught the ruler. After the ruler has been dropped, the individual being tested will catch the ruler as quickly as possible. ![]() This is because we want the experiment to test reaction time rather than anticipation. The ruler is let go randomly because we do not want the individual who is being tested to anticipate the ruler being dropped or be told that the ruler is about to be dropped. The ruler is then let go at a random point. The zero marking on the ruler should be in line with the thumb and index finger. The individual that is not being tested (A) then holds a ruler vertically between the thumb and index finger of the individual being tested (B).
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