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.
The Articles of Confederation established the first governmental structure unifying the thirteen states that had fought in the American Revolution. They went into effect on March 1, 1781 and lasted until March 4, 1789 when they were replaced by the US Constitution.