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 was the original binding document of the United States and served as the supreme law of the land from 1781 until the ratification of the United States Constitution in 1787. It defined the powers of the Continental Congress and provided for a weak federation of autonomous states.