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 and Perpetual Union was the first constitution of the United States. It was drafted by the Second Continental Congress from mid-1776 through late-1777, and ratification by all 13 states was completed in early 1781. When submitted to the states, ratification by thirteen states was required for it to become part of the Constitution; eleven had done so by early 1812. 2  However, with the addition of Louisiana into the Union that year (April 30, 1812), the ratification threshold rose to fourteen.