What is Reliability Test? What are the sources of reliability test availalbe?

Reliability of test:

Reliability is synonymous with the consistency of a test, survey, observation, or other measuring device.  Based on the inconsistency of this scale, any research relying on it would certainly be unreliable.

A reliability coefficient is often the statistic of choice in determining the reliability of a test.  This coefficient merely represents a correlation, which measures the intensity and direction of a relationship between two or more variables.

Sources of reliability:

There are some sources of reliability that can be found. We have enlisted some of them numerically as follows –

• Publication

• Date - is the information current, or does it need to be current?
• Reputation of publication - is the source well known and reputable?
• Kind of publication - is it a scientific report,   eye-witness account, a work of fiction?

• Author or Speaker

• Qualifications - is he an expert in his field?
• Bias - is he one-sided in his point-of-view? 
• Values - what does the author value in regards to the topic?
• Chance for personal gain - does the author stand to benefit from his position?

• Consistency of Information

• Confirmation or corroboration - can anyone else make the same claims?

• Means of Obtaining the Information

• Witness or researcher - was the author or speaker a first-hand witness to the information or did he gather it from some other source?
• Equipment - what kind of equipment was used to record information?      

So we can now easily find out the sources of reliability test and the definition of reliability test as well.

You should be looking for the "Validity Test and its steps".

Reference:

Ø  Kyrene.org (http://www.kyrene.org/schools/brisas/sunda/webquest/evaluating_reliability.htm)¹⁰