Validity and reliability explaination (1 Viewer)

[mrs_missile]

Hey
Can someone please explain validity and reliability.

 

[Ununoctium]

Validity and reliability are words that explain how repeatable an experiment's results are.

So for example, imagine an experiment that produced these results from 10 individual experiments;

26cm, 26.5cm, 26cm, 25.5cm, 26cm, 26cm, 26cm, 27cm, 26cm, 26cm.

We can deduce that this particular experiment was reliable, because the results are very similar. However, imagine this scenario;

26cm, 30cm, 23cm, 8cm, 27cm, 26cm, 29.5cm, 33cm, 24cm, 26cm.

These results are not reliable, because they are too different.

If an experiment is reliable, you can follow it's method and expect to get the same, or very similar results.

 

[Kurosaki]

Validity and reliability are words that explain how repeatable an experiment's results are.

So for example, imagine an experiment that produced these results from 10 individual experiments;

26cm, 26.5cm, 26cm, 25.5cm, 26cm, 26cm, 26cm, 27cm, 26cm, 26cm.

We can deduce that this particular experiment was reliable, because the results are very similar. However, imagine this scenario;

26cm, 30cm, 23cm, 8cm, 27cm, 26cm, 29.5cm, 33cm, 24cm, 26cm.

These results are not reliable, because they are too different.

If an experiment is reliable, you can follow it's method and expect to get the same, or very similar results.

No that's only reliability. Validity is like how appropriate your methodology was in achieving the aim of your experiment or some such.

 

[Julie M]

http://www.as.edu.au/gderrin/11_Biology/Accuracy,_validity,_reliability.html This website gives the syllabus definition