A VISUAL REASONING LESSON
Serial reasoning: follow the relationship
Serial reasoning involves following a consistent relationship across an ordered display. A useful strategy is to check the proposed change across every completed step rather than choosing a rule from just one pair.
Updated October 8, 2026 · Independent parent guide
A simple teaching illustration
In this deliberately simple illustration, each box adds one dot. The next box would contain four dots. It demonstrates how to test a consistent change; it is not a reproduction of an NNAT item or evidence of the difficulty of an official question.
A careful solving routine
- Inspect the order and layout before assuming which direction the relationship follows.
- Track one feature at a time: position, number, size, color or orientation.
- Check the proposed change across all completed information.
- Use the same rule to predict the missing part, then compare the choices.
Watch for these partial rules
- A rule that explains the first change but fails at the next one.
- A prediction that changes the number correctly but also moves an object without support.
- A choice that repeats the last visible picture instead of continuing the relationship.
Teaching without giving away the answer
Ask “Does your rule work on the other completed part?” or “Which feature did you track?” If the child cannot explain the relationship, return to a simpler original sequence. Once the idea is clear, use new shapes and arrangements rather than drilling the same picture.
A serial teaching example can be very easy or more demanding depending on the relationship. More objects do not automatically produce a harder reasoning problem.
Where this guide fits
Serial reasoning is a teaching category in our library. We do not claim a verified A–G category quota table or offer this demonstration as a full-level sample test. For original five-choice worked problems, visit the sample gallery.