Dr. khat is conducting a multisite trial for a large pharmaceutical company and has to select a scale that will consistently provide objective data for depression on a weekly basis. she needs the scale to be consistent and gradually change only in response to the positive effects of the drug. dr. khat needs a scale with good

Reliability

Explanation:

Reliability is the factor that maintains the consistency degree in any activity or object so that it can become trustworthy.

As Dr. Khat is carrying out the experiment for pharmaceutical company at multiple sites so that a dependable scale for objective data on the subject of depression can be gained per week.

Scale having reliability and authenticity can meet the required needs of pharmaceutical company and will face slight change due to drug's positive feedback .

Reliability

Explanation:

Reliability is the statistical phenomenon that is used to measure the consistency of a test.  

There are two types of reliability

Internal reliability:

To measure consistent within itself, for example, split-half reliability. Internal reliability assess the consistency within the items.  

External reliability:

It measures from one use to another use. For example test-retest reliability and inter-rater reliability.  A standardized test should be reliable.It varies from one to another.  

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