If I take a psychometric test online will it be as valid or
reliable as a pen a paper test?

The answer is yes. Psychometric tests have now been offered by psychologists online for many years and the online version of tests should generally be just as valid and reliable as the more traditional pen and paper hard copy tests. This is only true however when you are comparing reputable tests such as those available through Career Psychology which are developed by experts in psychometrics and assessment.

For information on reliability and validity data for Career Psychology products you may visit here...