title: Unconscious learning. Conditioning to subliminal visual stimuli.
abstract: The role of consciousness in Pavlovian conditioning was examined in two experiments in which visually masked neutral words were used as the conditioned stimuli (CS) and an electric shock as the unconditioned stimulus (US). The inter-stimulus interval (ISI) was established individually. A detection threshold was used in Experiment 1 and an identification threshold in Experiment 2. The primary dependent variable was the skin conductance response (SCR). Results showed that the conditioned response (CR) was acquired by 58% of participants who perceived stimuli above the identification threshold, 50% of participants who perceived stimuli below the detection threshold, and 11% of participants who perceived stimuli below the identification threshold, but above the detection threshold. These results suggest that consciousness of the CS-US contingency is not a necessary condition for acquiring a CR of the autonomous nervous system (ANS).
authors.affiliation: Departamento de Psicología, Facultad de Ciencias Sociales y Humanas, Universidad Pontificia de Comillas de Madrid, C/Universidad de Comillas no 3, 28049 Madrid, Spain. jnunez@chs.upco.es
authors.forename: Juan P
authors.initials: JP
authors.lastname: Núñez
authors.forename: Francisco
authors.initials: F
authors.lastname: de Vicente
mesh_terms: D000293:Adolescent; D000328:Adult; D003213:Conditioning, Psychological; D004192:Discrimination, Psychological; D005108:Extinction, Psychological; D005163:Factor Analysis, Statistical; D006801:Humans; D007858:Learning; D010470:Perceptual Masking; D013359:Sublimation, Psychological; D014473:Unconscious, Psychology; D014796:Visual Perception; D014825:Vocabulary