Glossary // Glossary term Technical
Signal
A time-varying recording of a measurable quantity, such as the electrocardiogram, skin conductance, respiration or an audio waveform, from which features are derived. A raw signal contains the component of interest together with noise and artefacts from movement, electrodes, environment and unrelated bodily processes. The signal itself is not an emotion; linking it to one requires the inferential steps of feature extraction, comparison with a baseline and interpretation in context. How one could reason about recording a catharsis-like change of state: signals, features, inference and context, baselines, self-report, error costs and ethics, and why every step stays uncertain. Nothing on this site measures anyone. Affective computing promises to infer emotion as if it were a system metric. The evidence on facial movements and autonomic signals, together with questions of consent, explains why every metric in this artifact is an artistic value. The works the definition rests on, with the level of evidence each was appraised at. (2012). Electrodermal activity. doi:10.1007/978-1-4614-1126-0 Supports technical statements about how electrodermal activity is recorded and what it indexes. Expert synthesis, not a test of any single claim.Where the site uses it
Studies behind it