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Iowa
Test of Basic Skills and the Cognitive Abilities Test
(ITBS and CogAT)
What Do The Numbers Mean?
SS (Standard Score) – This is a developmental score that describes your child’s location on an achievement continuum. The scale used with the ITBS Assigns a score of 200 to the median performance of students in the spring of grade 4 and a 250 to the median performance of students in the spring of grade 8. The following are the typical median standard scores for grades 2-9 on each ITBS test. The scale shows that average annual growth decreases as students move up from one grade to the next. The median scores are as follows:
Grade 2=168
Grade 3=184
Grade 4=200
Grade 5=214
Grade 6=227
Grade 7=239
Grade 8=250
Grade
9=260
NS (National Stanine) – Stanines represent a nationwide grouping into nine groups from one (the lowest) to nine (the highest) with 4th through 6th being average.
LPR (Local Percentile Rank) – Percentile ranks representing our school system – the Archdiocese of Atlanta. This score groups students into ranks from one (the lowest) to 99 (the highest) with the 50th percentile being average. This score shows the position of a score within 100 scores. For example, a score at the 55th percentile means that the student scored equal to or above 55% of the students in the norm-referencing group. Be careful! A percentile score is not the same as percent correct.
LS (Local Stanine) – The same as National Stanine, however the norm-referencing group is not as diverse, it includes only students in the Archdiocese of Atlanta.
NPR (National Percentile Rank) – Represents a nationwide grouping of students into ranks from one (the lowest) to 99 (the highest) with the 50th percentile being average. If a student scores in the 57th percentile nationally, it means that he/she scored equal to or better than 57% of the students in the national norm group.
Important Information for students in Grades 2, 5, and 7
As you review your child’s performance on the CogAT, please notice the Ability Profile that is located under the first box on the left hand side of the page. Your child can have an A, B, C, or E profile.
| A profile | Indicates that all three scores are roughly at the same level. Generally, about 1/3 of all students will have this profile. |
| B profile | Indicates that one score is above or below the other two. In other words, the student is demonstrating a relative strength (if the score is above) or a relative weakness (if the score is below). |
| C profile | Means that there is a contrast in scores. The scores show a relative strength and a relative weakness. |
| E profile | Should be carefully examined. These scores show extreme differences in the strengths and weaknesses of the student. |
The number that appears with the profile letter is the stanine score. Here are a few examples of profile and how to read them:
| 4B(N+) | This is a student with a stanine of 4 and a B profile (the nonverbal area is the strength). |
| 5A | This student had a stanine score of 5 with an A profile. All three scores on the CogAT (Quantitative, Verbal, and Nonverbal) are at roughly the same level. |
| 5E (N+V-) | This student has a stanine of 5 with extreme scores (E profile). The nonverbal area is a significant strength and the verbal area is a significant weakness. |
| 6B (Q-) | This student has a stanine score of 6 with a B profile meaning that the Quantitative area was below the other two areas. |
***You can visit www.cogat.com and enter your child’s profile. The site will provide you with beneficial information pertaining to your child’s specific profile. You will find helpful hints on how they learn best and what you can to do help them continue to achieve and meet with success in school.
Please contact Mrs. Bigham with any further questions or concerns.
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This site was last updated on August 14, 2008 by the OLV Web Team