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 unanimously adopted in 1781 once Maryland agreed. Over the previous four years, it had been used by Congress as a working document to administer the early United States government, win the Revolutionary War and secure the Treaty of Paris (1783) with Great Britain.ince the beginning of federal operations under the Constitution in 1789 through the beginning of 2013, approximately 11,539 proposals to amend the Constitution have been introduced in the United States Congress. Of these, thirty-three have been approved by Congress and sent to the states for ratification.