Five of the eight aptitudes are measured using a single assessment section. However, Fluid Reasoning, Processing Speed, and Memory are each measured using two distinct sections—one in a perceptual modality and one in a symbol-based modality.
- The perceptual modality involves direct interpretation of images or shapes—information that is processed visually and literally.
- The symbol-based modality uses abstract symbols such as letters, numbers or words—systems of meaning that must be learned and interpreted.
By assessing these aptitudes in both modalities, the tool provides a more complete and differentiated picture of a student’s cognitive strengths. Only these three aptitudes were found to be practically and meaningfully measurable in both formats. For example, mathematical reasoning relies heavily on symbolic processing, so a perceptual version of that assessment would not provide a valid or distinct measure.