up: [[HD 2830 Research Methods and Design]] Tags: #🌲 # Differences Between Random Assignment and Selection Random selection is used to randomly select participants for a sample. Random assignment, however, is used to randomly assign people to various groups after you have found your sample. Random selection is needed to establish [[External validity]] where as random assignment is required to establish [[Internal validity]]. Reference: Related: [[Experimental Study Design]] [[Types of Correlational Design]] Created: [[20-09-2022]]