Question

when conducting research our tests must be reliable and vaild explain those two concepts also how does our choice of subjects to be tested ( such as urban third grades) affect validity? give examples

Answer 1

Reliability and validity are two concepts in research that are important for defining and measuring bias and distortion. Reliability refers to the extent to which assessments are consistent. If a person takes the same personality test several times and always receives the same results, the test is said to be reliable.

Validity refers to how well a test measures what it is purported to measure. If the results of the personality test claimed that a very shy person was, in fact, outgoing, the test would be invalid.

Reliability and validity are independent of each other. A measurement may be valid but not reliable, or reliable but not valid. For example, your bathroom scale was reset to read ten pounds lighter. The weight it reads will be reliable because it gives you the same weight every time you step on it but this result is not valid since it is not reading your actual weight.

PLEASE POST YOUR OTHER PART OF THE QUESTION AGAIN AS IT IS NOT CLEAR TO ME. THANKS