Matrix Reasoning asks which figure completes a matrix or sequence
In the WAIS Matrix Reasoning subtest, the person examines figures arranged according to a relationship and chooses the option that belongs in the missing position. The answer is not simply the figure that looks most similar. It must satisfy the relationship among the figures already shown.
Items can include a matrix as well as a sequence of figures. In WAIS-IV, Matrix Reasoning is a core subtest of the Perceptual Reasoning Index (PRI), alongside Block Design and Visual Puzzles.
In WAIS-5, Matrix Reasoning is a primary subtest of the Fluid Reasoning Index (FRI) and remains part of FSIQ. WAIS-IV and WAIS-5 compared explains the wider change in subtest roles.
The person must identify what stays the same and what changes across the figures. Relevant features can include:
- shape or line;
- orientation;
- position;
- size;
- number; and
- shading or fill.
A feature may remain constant, change in a sequence, exchange positions, or be combined with or removed from another figure. Solving the item brings together:
- Rule discovery — identifying which elements change and how they change
- Relational integration — combining relationships found across several rows, columns, or visual attributes
- Hypothesis testing — checking whether a possible rule also works in the other parts of the matrix or sequence
Difficulty rises when relevant features must be separated from distracting detail or several vertical and horizontal rules must be integrated. Matrix Reasoning is a representative task for fluid reasoning, or Gf, because the rule must be derived from unfamiliar information rather than retrieved from learned facts.
What higher and lower Matrix Reasoning scores can show
A higher score indicates that, compared with people of the same age, the person was strong at selecting relevant features in unfamiliar figures, identifying abstract rules, and integrating several relationships into one answer.
A lower score means that selecting the relevant features and combining several relationships into a consistent rule was more demanding. The interpretation can consider attention to the right feature, recognition of change, understanding of correspondences, retention and integration of several rules, and flexibility in changing an initial hypothesis.
This is the kind of processing used when learning how an unfamiliar system works from a few examples and applying the inferred rule to a new case.
If Matrix Reasoning is clearly higher than Visual Puzzles, discovering rules among figures may be a relative strength compared with mentally decomposing and assembling shapes. If it is clearly higher than Figure Weights, inductive visual rule discovery may have been easier than deriving quantitative equivalence from stated conditions. How to read WAIS results explains how to place these differences within the whole profile.
How Matrix Reasoning differs from Visual Puzzles, Figure Weights, and Set Relations
| Subtest | Direct task | Main reasoning involved |
|---|---|---|
| Matrix Reasoning | Choose the missing part of a matrix or sequence | Discover changes, spatial relationships, and correspondence rules among figures |
| Visual Puzzles | Choose the parts that would form a completed shape | Decompose, rotate, and combine shapes mentally |
| Figure Weights | Choose the weight that would balance a scale | Derive quantitative equivalence from the conditions shown |
| WAIS-5 Set Relations | Work from explicit relational conditions | Derive a conclusion that is consistent with all of them |
BrainTypeIQ Matrix Reasoning also measures rule discovery in figures
BrainTypeIQ Matrix Reasoning also asks the person to identify rules involving shape, orientation, position, and number and choose the option that satisfies them. Both tasks use unfamiliar figures to examine fluid reasoning through pattern discovery.
WAIS and BrainTypeIQ use different scoring systems, standardisation, and assessment purposes, so the assessments and their scores are not interchangeable.
BrainTypeIQ combines Matrix Reasoning with Figure Weights so its fluid-reasoning domain reflects both discovering a rule and deriving an answer from stated equivalences.