What are the two primary item types in matrix reasoning?

In matrix reasoning, the two primary item types involve the patterns or arrangements made using shapes, figures, or colors, often presented in a matrix format. This format usually includes a grid that must be completed by selecting the appropriate option among multiple choices, helping to assess non-verbal reasoning abilities.

The correct answer highlights that matrix reasoning often includes both matrix items and serial order items. Matrix items specifically focus on identifying relationships between shapes or patterns in grid-like structures, while serial order items assess the ability to recognize sequences or the proper arrangement of elements based on the identified rules or patterns.

This assessment method integrates logical thinking and visual cognitive skills, which are crucial components in evaluating children's cognitive development. Thus, identifying these two item types correctly supports the understanding of how different reasoning aspects are tested within this scale.