6. Reliability and Validity

The concepts of reliability and validity are extremely important to any research and both are associated with the research instruments used. The reliability of any method of collecting data is a statistically determined coefficient (number), ranging from -1 to +1, and is defined as the ability of a measurement instrument to give the same results when it is repeated using the same subjects. The validity of an instrument is determined primarily in philosophical terms regarding its value or relevance. There is no simple statistical method to determine the validity of an instrument.


Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google+ photo

You are commenting using your Google+ account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s