Reliability and Validity





Testing Considerations


In order to utilize effectively the available concept of standardized testing; athletes, coaches, and parents should keep several things in mind.


      Select testing techniques that are reliable and valid



This refers to the consistency, accuracy or repeatability of a test.  If an individual does not change his or her athletic ability then a reliable test, repeated twice will show no difference.  The only variable the test should measure is the one it is designed to. Reliability is important for the following reasons:


o   If or when you repeat the measurement 

o   For performance tests, it’s usually more important than validity 

o   Because you need good reproducibility to monitor small but important changes in individual athletes 

o   It's crucial for researchers


To improve reliability eliminate these factors that contribute to non-reliable tests.

o   Unqualified examiners are used for testing and retesting

o   Change of test protocol

o   The examiner uses poor technique failing to standardize the test and calibrate equipment

o   External factors have not been controlled, such as environmental conditions, methodology, order of tests, or using different equipment


 Further means to ensure reliability.

o   Strict warm-up protocol for all tests

o   Administration of tests that follows a consistent design

o   Accurate timing system

o   Orientation for pre-test preparation – hydration, nutrition, rest, etc.                                   



    This refers to the degree that a test measures what it intends to.  This is usually                               straightforward, a distance run  for example would not be a valid measure for explosive power.                                                                                                                         


o   Select testing, tests, and protocols that are relevant to the sport

o   Tests should be challenging, but not to the point where test termination is effected by excessive body temperature, dehydration, or energy depletion

o   Tests must be conducted in a safe and productive environment

o   Provide valid and appropriate feedback to the athlete in a timely manner







BAM is the worldwide leader in athletic testing, providing the most vaild and reliable testing for athletes of every major sport, at every level. Our services are used by the NBA, Adidas, and major colleges such as UCLA, NC State, and Wake Forest.