O level examined  the effect of question choice 
Alan S. Willmott, Cedric G. W. Hall. 
 - London  Macmillan Education  1975. 
 - 200 p. : ill. ;  24 cm. 
 - Schools Council research studies. .
<br/><br/> Includes indexes. 
<br/><br/>p. 189-193. 
<br/><br/><label>ISBN: </label>0333176499 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Examinations--United Kingdom.