Appendix - 1 :

Leiter Intelligence Scale
Digits forward and backward:
This test is in two parts. Part-I consists of eight items, the first being a three digit series and the last a ten digist series.


This subject is asked to repeat each series from after the exainer reads it. Part-II also consists of eight items, the first being a two digit series and the last a nine digit series. The subject is asked to repeat in reverse order, the digits which the examiner reads to him.

Instructions for administering Part-I: Repeating digits forward		Score
1.	6-4-9 7-3-2	12
2.	5-2-8-3 4-7-2-3	16
3.	3-9-4-1-6 8-3-5-2-4	20
4.	7-5-1-8-3-6 4-8-5-3-9	24
5.	2-9-4-1-7-3-8 5-1-7-2-9-3-6	28
6.	8-3-2-5-7-4-9-1 4-7-2-8-5-9-1-6	32
7.	8-4-3-6-1-9-2-5-7 4-7-2-8-5-9-1-6	36
8.	7-4-9-1-6-3-2-8-7-5 5-7-2-8-3-6-1-9-4-7	40

Instructions for administering Part-II Repeating digits backward		Score
Practice	3-5-2 8-1-5
1.	7-3 4-9	8
2.	5-7-1 3-9-2	12
3.	6-1-8-5 2-7-5-3	16
4.	9-2-1-5-3 8-3-7-2-6	20
5.	5-1-9-2-3-8 6-3-8-1-4-9	24
6.	3-7-1-4-8-2-5 2-5-9-4-1-7-3	28
7.	8-4-1-3-5-2-9-6 6-4-3-1-9-2-8-7	32
8.	3-8-2-7-5-9-1-6-4 4-1-9-3-8-2-7-5-6	36

Instructions for obtaining and recording the digit test I.Q. score:
1. Add the credits earned by the subject on Part-I and Part-II and enter the score.
2. Convert the raw score to an I.Q. score by using the table given below.
Table for converting digit series raw score to I.Q. scores:

Raw score	I.Q. score	Raw score	I.Q. score
56	149	44	105
55	146	43	100
54	143	42	96
53	140	41	92
52	137	40	88
51	134	39	84
50	131	38	80
49	128	37	74
48	124	36	68
47	120	35	62
46	115	34	56
45	110	33	50

Intelligence grading:
I.Q. Grading:
130 and >	Very superior
120-129	Superior
110-119	Bright normal
90-109	Average
80-89	Dull-normal
70-79	Border line
69 and <	Mentally defective