1.3 CogAT Ability Profiles: Median Stanines, Patterns (A, B, C, E) & Instructional Differentiation

Decode the report, not the student

The CogAT Ability Profile summarizes the level and pattern of results across Verbal, Quantitative, and Nonverbal reasoning. It helps educators discuss differences among batteries rather than hiding them inside one composite. It is a description of assessment results, not a diagnosis, personality type, or prescribed career.

Read the code as three parts: a number for the median age stanine, a pattern letter, and any battery indicators. For example, a reported 8B (V+) means median stanine 8, a B pattern, and a relative Verbal strength. The code does not say that the student must study literature or avoid mathematics. Use it to ask which instructional approaches are worth trying and what other evidence supports them.

Find the median stanine

The median is the middle value after sorting, not the arithmetic average. Consider age stanines Verbal 8, Quantitative 6, and Nonverbal 9. Sort them as 6, 8, 9; the median is 8. Averaging gives about 7.67, but the profile digit is based on the median.

A second example uses stanines 7, 7, 9. Sorting changes nothing, and the median is 7. A code beginning with 8 would be inconsistent with those three supplied stanines. This check is useful when someone has copied a report into a letter or spreadsheet incorrectly.

Keep the comparison type consistent. Use the age stanines intended for the profile, rather than mixing an age stanine for one battery with grade stanines for the others. Do not manufacture the age stanines by applying informal SAS ranges found in an unrelated source.

Understand the pattern letters

Riverside describes these broad patterns:

The last row supplies a specific SAS threshold. A 24-point gap equals $24/16=1.5$ standard deviations on the SAS scale. It cannot be substituted with a two-stanine rule: stanines are broad, bounded bands, and the same difference in bands can contain different SAS gaps.

For an independent boundary check, highest SAS 138 and lowest SAS 115 give $138-115=23$, below the E threshold. Highest 139 and lowest 115 give 24, meeting it. These calculations do not supply the remaining profile indicators or median digit; those require the other report information.

Use the reported classification or Riverside's interpretation tool for B and C. This guide does not infer them from overlapping confidence intervals or an invented universal significance test. Guessing a complete code from three loosely rounded scores risks assigning the wrong pattern.

Relative strength is not absolute rank

The battery letters identify V for Verbal, Q for Quantitative, and N for Nonverbal. A plus sign marks a relative strength, and a minus sign a relative weakness or area of opportunity within the student's profile.

Suppose a report identifies a Nonverbal relative weakness while the Nonverbal SAS is 118. That value is still above the SAS mean of 100. The minus sign compares batteries within the student; it does not say that Nonverbal performance is nationally below average. Conversely, a relative strength does not necessarily put the student near the top of national norms.

This distinction prevents two opposite mistakes. First, a family may view a minus sign as a failing grade and overlook a useful strength. Second, a family may treat a plus sign as automatic qualification for advanced coursework. Neither interpretation follows from the symbol alone.

Translate a profile into a testable teaching idea

Imagine a student with a reported Verbal relative strength who struggles to remember multi-step arithmetic procedures. A teacher might invite the student to explain each operation in words, then compare the explanation with the written calculation. If errors decrease on new problems, the strategy may be useful. The profile suggests an approach to explore; performance on those new problems supplies evidence that it works.

For a student with a Nonverbal relative strength, a teacher might pair a written explanation with a diagram or model. The student should still practice reading the explanation. Supporting one approach does not establish an exclusive “visual learning style” or justify withdrawing access to other ways of learning.

For a Quantitative relative strength, asking the student to organize evidence in a table may help with a science discussion. It does not establish mastery of calculus prerequisites or prove readiness for a particular accelerated class. Work samples and course-specific knowledge remain relevant.

An uneven profile calls for context

A large gap may prompt questions about language exposure, instruction, access needs, test conditions, or a pattern already present in classroom work. It does not identify the cause. CogAT does not independently diagnose dyslexia, ADHD, autism, or another condition, and an E profile does not establish twice-exceptionality.

If there are persistent concerns, bring the report and classroom evidence to the appropriate school professionals. Separate the questions “What opportunities suit this student's demonstrated work?” and “What support or assessment is needed?” A relative weakness should not erase strengths, and a strength should not make a support need invisible.

A profile discussion checklist

1. Confirm that the copied stanines and median digit agree.
2. Read the reported pattern and battery indicators.
3. Compare absolute normative results with relative strengths.
4. Check administration and language context.
5. Choose one instructional approach to try and a task for evaluating it.
6. Revisit the approach with actual work rather than assuming the code predicts success.

Use the Riverside Ability Profile Finder to interpret a reported code. The owner's profile explanation supplies the pattern definitions. Sources checked October 10, 2026.