Question

.   Explain what is meant by internal and external validity.

Answer 1

Solution:

Given that,

Internal validity:

Internal validity is the extent to which the experiment is free from errors and any difference in measurement is due to

independent variable and nothing else.

It is a measure of accuracy of the experiment.

Degree to which the conclusion is warranted.

Address or eliminate alternative explanation for the result.

Eternal validity:

External validity is the extent to which the research results can be inferred to world at large.

It checks whether the casual relationship discovered in the experiment can be generalized or not.

Degree to which the study is warranted to generalize the result to other context.

Generalize the outcome.