Frequently -...

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Frequently, there is overall consistency in data while there appears to be little local  consistency, or vice versa. This is the “forest-trees” problem. A comparison of whole  forests may show consistent effects, even through a comparison of each tree is  confusing or vice versa. Viewing the data within a broader or narrower context may  increase reliability. Additionally, rescaling the data with a transformation such as a  log transformation may allow the orderly nature of the data to be more apparent.  Whether or not consecutive measures of the same thing have the same  value or not is determined by the measuring instrument. An instrument  which is extremely coarse will provide measures which differ very little  and which are therefore extremely reliable. For example, if you measured  your weight on a scale for tractor trailers you would find that you always 
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This note was uploaded on 11/09/2011 for the course PSY PSY2012 taught by Professor Scheff during the Fall '09 term at Broward College.

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Frequently -...

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