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Deconstruct - Coggle Diagram
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Validity
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It is vital that the control group is actually controlled as best as possible to ensure valid results.
Testing the bacteria E. Coli improves external validity as it is most commonly encountered by people in daily life.
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No. of Bacteria Strains
Chosen to test only E. Coli in this experiment as this is one of the most commonly encountered bacteria in daily life and therefore most hand sanitisers should be designed to combat this.
Testing only one bacteria will also allow us to increase sample size, making it more reliable
Effectiveness of hand sanitiser may differ depending on the bacteria used, therefore using only one will control the experiment further
Reliability
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To increase reliability, a large sample size is required in order to test whether results are accurate.
This experiment is limited as we have a sample size of only three, decreasing the test's reliability.
Amount of Hand Sanitiser
The World Health Organization (WHO) recommends applying a “palmful” of sanitizer, or more than a half a teaspoon
The amount of hand sanitizer dispensed can depend on the type of bottle used, i.e. pumps or pouring.
The amount of hand sanitizer can alter effect of it as chemicals can be overused and work against the skin instead.
Duration of Absorbtion
The higher alcohol concentrated hand sanitizers often have a quicker rate of absorption into the skin. This is due to the chemical properties of alcohol within the sanitizer when exposed outside of its bottle
The quicker the absorption can be due to the texture of the substance ie, the gel like sanitizers or liquid like as compared to spray forms.
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