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Agency filings affecting this section

PDFWAC 388-828-4420

How does DDD determine your percentile rank and standard score for each subscale in the SIS support needs scale?

DDD uses the following table to convert your total raw score for each subscale into a percentile ranking:
If your raw score for the following SIS subscale is:
 
 
Home Living
Community Living
Lifelong Learning
Employment Support
Health and Safety
Social Activities
Then your percentile rank for the SIS subscale is:
And your standard score for the SIS subscale is:
 
 
 
 
 
 
˃99
20
˃88
˃94
 
 
 
 
˃99
19
87-88
93-94
 
 
 
 
˃99
18
85-86
91-92
 
 
˃97
 
99
17
81-84
88-90
˃96
˃95
92-97
˃97
98
16
77-80
84-87
92-96
91-95
86-91
91-97
95
15
73-76
79-83
86-91
85-90
79-85
84-90
91
14
68-72
74-78
79-85
78-84
72-78
76-83
84
13
62-67
69-73
72-78
70-77
65-71
68-75
75
12
55-61
63-68
64-71
61-69
57-64
58-67
63
11
48-54
56-62
55-63
52-60
49-56
48-57
50
10
40-47
49-55
46-54
42-51
42-48
38-47
37
9
32-39
41-48
36-45
32-41
34-41
28-37
25
8
25-31
33-40
27-35
23-31
27-33
19-27
16
7
18-24
25-32
18-26
15-22
20-26
10-18
9
6
11-17
16-24
9-17
7-14
13-19
3-9
5
5
3-10
6-15
<9
<7
7-12
<3
2
4
<3
<6
 
 
1-6
 
1
3
 
 
 
 
<1
 
<1
2
 
 
 
 
 
 
<1
1
[Statutory Authority: RCW 71A.12.030 and 2012 c 49. WSR 13-01-080, § 388-828-4420, filed 12/18/12, effective 1/18/13. Statutory Authority: RCW 71A.12.030 and Title 71A RCW. WSR 07-10-029, § 388-828-4420, filed 4/23/07, effective 6/1/07.]
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