4io 
APPENDIX 
you to arrange these cards (holding out sample set) like 
this: those that have X and Y on them go here (pointing 
to appropriate corner of large cardboard and laying down 
the card) where it says X — Y; those that have X and K 
on them go here, where it says X — K (laying down the 
cards which contain X - K); those that have 5 and 6 on 
them go here; and those that have none of these combina 
tions here, where it says other. Now (picking up the 
sample set and handing it to subject) try it with these 
cards.” 
“Now do the same thing with these cards (handing sub 
ject the large pack). Do it carefully and quickly but do 
not rush. All right? Start.” Allow subject to finish. 
Record: Sort back cards, counting all mistakes. Record num 
ber of test, number of seconds taken, number of mistakes 
made. E. g., 12; 84 — 2. 
Rating: Apply formula II. Point of reference is 50 cards cor 
rectly sorted in 80 seconds; RU, 50, the total number of 
units in the test; Ru or reference time per unit is 80 -5- 50 
or 1.6; E, errors, to be counted double; T, time taken. 
Applying this formula to the sample record above, 
1.6 X 50 - 4 
h - J4 
13b. Oral Directions (easy) 
Description: This test, because of its nature, is given under 
instructions. 
Instructions: “I am going to give you a number of directions 
so listen very carefully and do exactly what I tell you to. 
For instance, I might ask you to fold this sheet of paper 
twice and then write your name near the top, like this, 
(examiner demonstrates). Be sure to listen carefully each 
time and as soon as I stop talking do exactly what I say. 
Are you ready?” The examiner then proceeds to give 
the following series of directions which he has carefully