Caffeine ruler reaction time test

Caffeine can be extracted from the coffee bean, tea leaf, kola nut and cacao pod. Introduction Reaction time is the measure of how quickly an organism can respond to a particular stimulus.

However, continue exposure to caffeine leads to developing a tolerance for it. A: More than one.

reaction time ruler test hypothesis

A larger sample is needed, especially if the results should not be influenced by the personal status of each participant. Tweet Measuring reaction time of a human nerve-controlled reaction This is likely to be a very familiar protocol.

Effects of caffeine on human reaction time experiment

As many as possible to eliminate other differences from person to person. Once it enters the body, it takes about 6 hours for the caffeine to be reduced in half. Researches have been made on the Internet but medical advice at this level would have been useful. Compared to the first project submitted, the hypothesis and the methodology of the experiment were simplified. Ask the student to hold the metre ruler vertically in one hand so that their hand is a little over 1 m from the floor. Set up a double-blind test for the effect of caffeine. If the value of t is large, the two sets overlap only partially and therefore the null hypothesis is rejected.

Where the caffeine concentrations are not equivalent, another variable is introduced that could be responsible for any change in reaction time. Compare the mean averages again. This might make a more meaningful, or more interesting comparison.

Teaching notes Deciding on a number of repeats The spreadsheet shows the effect of taking several results and then calculating a mean average.

Caffeine and reaction time data

Caffeine is one of the drugs that can affect the functions of the nervous system. This might make a more meaningful, or more interesting comparison. Some individuals do not tolerate caffeine very well. Compare the mean averages again. Adrenaline is responsible for speeding up the heart rate and increasing anxiety as it prepares the body for "fight-or-flight" situations Helmenstine, n. Compared to the first project submitted, the hypothesis and the methodology of the experiment were simplified. Tell them that they have to catch the ruler when you drop it.

Ethical issues Students are effectively test subjects for this practical. The calculation of probabilities would have provided a p-value.

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Measuring reaction time of a human nerve