Glossary
Terms used in accessibility research and practice. Each entry has a definition, common aliases, and category tags.
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- F-measure(also: F-score, F1 Score)
- A metric that combines correctness (precision) and sensitivity (recall) into a single balanced score, calculated as the harmonic mean of the two values. In accessibility evaluation research, the F-measure provides a single number representing the overall effectiveness of an…
- FaceReader(also: Noldus FaceReader)
- A commercial facial-expression recognition software (developed by Noldus) that uses computer vision and deep learning to automatically classify faces into basic emotions (neutral, happy, sad, angry, surprised, scared, disgusted) and to estimate emotional valence and arousal in…
- Feasibility Study(also: Feasibility Trial, Pilot Study)
- A feasibility study is a small-scale investigation conducted before a full-scale trial to determine whether a planned intervention or system can be delivered as intended in its real-world setting. Feasibility work asks practical questions — Can we recruit? Can participants…
- Friedman Test(also: Friedman Rank Test)
- The Friedman test is a non-parametric statistical test used to detect differences across three or more related samples - for example, the same participants rating three interface conditions. It ranks each participant's responses across conditions and tests whether the rank sums…
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