In the training phase, subjects are exposed to several light-footshocks pairings in a Startle box. Later, in the test phase, acoustic startling stimuli are presented consecutively to the light cue. If the association between the light cue and footshocks has been correctly learned in the training phase, light cue prior exposure increases the startle response. Inversely, in subjects with alteration of learning and memory abilities, prior presentation of the light cue does not change the startle response.