1 the use of a variety of data sources (data triangulation) 2  the use of several different researchers (investigator triangulation) 3  the use of multiple perspectives to interpret the results (theory triangulation)  the use of multiple methods to study a research problem (methodological triangulation)
The Articles of Confederation was the United States' first constitution. Proposed by the Continental Congress in 1777, it was not ratified until 1781.
While the U.S. Articles of Confederation was a plan of government based upon the principles fought for in the American Revolutionary War, it contained crucial flaws. It had no power of national taxation, no power to control trade, and it provided for a comparatively weak executive.