Experimental and Quasi-Experimental Designs for Research ~pg.50

(Donald T. Campbell- txtbk) THREE PRE-EXPERIMENTAL DESIGNS The One-Shot Case Study: X O single group studied only once. total absence of control no scientific value minimum reference point error of misplaced precision?!?! The One-Group Pretest-Posttest Design: O1 X O2 when nothing better can be done O1 (Pretest)¬†and O2 (Posttest)¬†difference: rival to the hypothesis that X… Continue reading Experimental and Quasi-Experimental Designs for Research ~pg.50