The maturation threat can operate when biological or psychological changes occur within subjects and these changes may account in part or in total for effects discerned in the study. For example, a ...

Linda Grayson has 20+ years of experience in proprietary trading and index futures. She began writing for Investopedia in 2018. David Kindness is a Certified Public Accountant (CPA) and an expert in ...

The information needed to determine the internal and external validity of an experimental study is discussed. Internal validity is the degree to which a study establishes the cause-and-effect ...