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This tutorial introduces 9 sources of threat to internal vailidity and asks the user to classify hypothetical experiments as either internally valid or invalid and identify the source of threat if invalid.
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Date Of Record Creation 2004-07-06 21:42:00
Date Last Modified 2004-07-27 15:38:00
Date Of Record Release 2004-07-06 21:42:00
Email Address
Date Issued 1998
Resource Type
Author Name David Polson
Author Organization Athabasca University
Source Code Available
Material Type
Statistical Topic
Cost involved with use
Intended User Role
Math Level

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