Insight

We define an insight as an individual observation about the data by the participant, a unit of discovery.
[Saraiya et al., 2005]

Insight: The capacity to discern the true nature of a situation; The act or outcome of grasping the inward or hidden nature of things or of perceiving in an intuitive manner.

[Merriam-Webster]

References

[Saraiya et al., 2005] Purvi Saraiya, Chris North, and Karen Duca, An Insight-Based Methodology for Evaluating Bioinformatics Visualizations, IEEE Transactions on Visualization and Computer Graphics, 11(4):443-456, July/August 2005.