Test Scores Chart

  Scaled Scores, Standard Scores, National Percentile Ranks

Broader Descriptions, Qualitative Descriptions, Stanines, and Standard Deviation diagram



Scaled
Score
Std
Score
Percent
-iles
Broader
Descriptions
Qualitative
Descriptions
Stanine
 Std
Deviat
-ions



19




18



17




16		 149
148
147
146
145
144
143
142
141
140
139
138
137
136
135
134
133
132
131
130
129
128
127
126
 99.9+
99.9%
"
"
"
99.8%
"
99.7%
"
99.6%
99.5%
"
"
"
"
"
"
"
98%
"
97%
"
96%
"















Strength

or

Above
Average
Exceptional Strength

or

Very well Developed

or

Superior

or

Excellent












9



+3









+2
15




14		 125
124
123
122
121
120
119
118 		95%
"
94%
93%
92%
91%
90%
88%
Strength

or

Well developed

or

Above average

or

Good



8









+1


13		 117
116
115
114
113
112
111		 87%
86%
84%
82%
81%
79%
77%


7
12




  
11
 110
109
108
107
106
105
104 		75%
73%
70%
68%
66%
63%
61%










Average

High-end Average

6

+0.50



10
 103
102
101
100
 99
 98
 97
 96		 58%
55%
53%
50%
47%
45%
42%
39%


Average


5


0
9




8		  95
 94
 93
 92
 91
 90		 37%
34%
32%
30%
27%
25%


Low-end Average


4


-0.50




7

 89
88
87
86
85
84
83
82
81 		23%
21%
19%
18%
16%
14%
13%
12%
10%













Weakness

or

Below
Average




Weakness

or

Poorly developed

or

Below average

or

Poor



3



-1
6






5
 80
79
78
77
76
75
74
73		  9%
 8%
 7%
 6%
 5%
  " 
 4%
  "


2


4




3




2




1
 72
71
70
69
68
67
66
65
64
63
62
61
60
59
58
57
56
55
54
53
52
51
 3%
 "
2%
 "
 "
 1%
 "
 "
 "
 "
 "
.05%
.04%
.03%
  "
.02%
  "
.01%
 "
 "
 "
-.01%

Exceptional weakness

or

Very poorly developed

or

Far below average

or
 
Very poor





1

-2














-3

Adapted from Jerome M. Sattler, ASSESSMENT OF CHILDREN: COGNITIVE APPLICATIONS book.
This table/chart is a visual, to assist in understanding of student's test scores, and descriptions when reviewing students
evaluations.

To print a condense (1 page) printer version of the Table of Score Chart

Our hope is that it will help in the understanding of the following type of questions: General Bell Curve and Full Scale IQ ranges, click here.

Detail Bell Curve (including all the scores, will take a while to load, large graphic)

Type of Scores

Standard Score (SS) Compares the student's performance with that of other children at the same age or grade level.  For reference, Standard Score of 85-115 fall within normal range.  Standard score of 84 or lower fall below the normal range and scores of 116 or higher fall above normal range.

The Percentile (%) Score indicates the student's performance on given test relative to the other children the same age on who the test was normed.  A score of 50% or higher is above normal range.

Stanine Score like the Standard score, reflects the student's performance compared with that of students in the age range on which the given test was normed.  For reference, a stanine of 7 is above average, a stanine of 5 is average and a stanine of 3 is below average.

The Standard Deviation is a useful measure of the scatter of the observations is this: if the observations follow a Normal distribution, a range covered by one standard deviation above the mean and one standard deviation below it (x+1SD) includes about 68% of the observations; a range of two standard deviations above and two below (x+2SD) about 95% of the observations; and of three standard deviations above and three below (x+3SD) about 99.7% of the observations.

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