Lewin, Miriam, b.1931 <br/><br/>
Understanding psychological research  the student researcher's handbook 
By Miriam Lewin 
 - New York  John Wiley & Sons  1979 
 - 452 p. :  ill. ;  24 cm. 
<br/><br/>p. 418-435 
<br/><br/><label>ISBN: </label>0471658375 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Psychological research.<br/>Experimental design.<br/>Psychology--Methodology.<br/>Psychometrics.