validity (1 Viewer)

[Jaydels]

I don't really understand the concept of validity in an investigation. What makes the observations of an investigaton valid?

 

[rama_v]

Validity generally refers to wether an experiment's method really achieves what it sets out to do. For example an experiment measuring the usefulness of a fertiliser is not going to be valid if the plants are not watered.

 

[Jaydels]

oh i see
thankyou

 

[richz]

same as relaiblity. Validility is the amount of times u repeat the exp and u are getting the same results meaning its valid. So to improve the validility just repeat exp until u get similar results

 

[rama_v]

same as relaiblity. Validility is the amount of times u repeat the exp and u are getting the same results meaning its valid. So to improve the validility just repeat exp until u get similar results

Not necessarily - Validity, Reliability and accuracy are separate things though reliability does indeed affect the validity of an experiment. A more valid experiment accounts for many factors, such as error in measurement, and it also controls all variables (except of course the dependent variable).

 

[richz]

ok fair enuf..

 

[velox]

With regards to validity, you should control all the variables not being tested. That is one way of improving validity.

 

[Jaydels]

yep...it makes sense now
thankyou