|the desired absorption of immigrant groups into the culture and mores of the resident population
|the desired absorption of immigrant groups into the culture and mores of the resident population
+
|-
+
|attention span
+
|1934
+
|correlated with intelligence, the attention span is how long someone can concentrate on something. It is rapidly shortening; the Lincoln-Douglas debates of 150 hours ago lasted for hours, but none do today.<ref>http://www.help4teachers.com/ras.htm</ref>