13.: Us

Research into the early United States frequently highlights the recurring use of the number 13 as a symbol of unity among the original colonies:

: Seminal papers like "The Neglected 95%: Why American Psychology Needs to Become Less American" by Jeffrey Arnett argue that US-centric research (which often focuses on the "US" experience) fails to represent the broader human population. 13. Us

: Legal research often examines the 13th Amendment , which solidified the end of slavery in the US, as a "solid ground" for modern civil rights analysis. Research into the early United States frequently highlights

: A famous 2015 study attempted to replicate 100 psychology experiments, finding that only about one-third produced significant results, often with effect sizes half as strong as the originals. 13. Us