A threshold is a critical value beyond which some event occurs or values change drastically. In biological neorones and artificial neurons there is often no reaction for small or moderate amounts of activation from other neorons. However, if the level of input activation goes beyond some threshold, then the neuron will fully fire.
Used in Chap. 6: pages 84, 86, 87, 88, 90; Chap. 9: pages 130, 131, 137, 138; Chap. 10: pages 146, 147; Chap. 12: pages 175, 176, 177, 180, 184, 185, 191, 196, 202; Chap. 19: page 329; Chap. 20: page 335; Chap. 21: page 357
Also known as thresholding