80 
— 
— 
Stage and Description 
of Achievements 
III A?B (a)and(b) 
Finds exclusion very difficult and 
method, although mostly sound 
shows no untested inferences or 
(c) although failing completely 
to exclude, has excellent method 
of investigation 
— 
Content Method 
Ordering Effect (1) (2) (3) (4) (5) (6) 
St. Wt. H. St. Wt. H. 
— 
(a) 
+ ++ + 0 0 + + + +/0 - - 
(+ *) 
(b) 
+ + + 
- 
+ or + 
+ + 
(- *) 
(c) 
+++ +- . + + + +++