title: Playing chess unconsciously.
abstract: Expertise in a certain stimulus domain enhances perceptual capabilities. In the present article, the authors investigate whether expertise improves perceptual processing to an extent that allows complex visual stimuli to bias behavior unconsciously. Expert chess players judged whether a target chess configuration entailed a checking configuration. These displays were preceded by masked prime configurations that either represented a checking or a nonchecking configuration. Chess experts, but not novice chess players, revealed a subliminal response priming effect, that is, faster responding when prime and target displays were congruent (both checking or both nonchecking) rather than incongruent. Priming generalized to displays that were not used as targets, ruling out simple repetition priming effects. Thus, chess experts were able to judge unconsciously presented chess configurations as checking or nonchecking. A 2nd experiment demonstrated that experts' priming does not occur for simpler but uncommon chess configurations. The authors conclude that long-term practice prompts the acquisition of visual memories of chess configurations with integrated form-location conjunctions. These perceptual chunks enable complex visual processing outside of conscious awareness.
authors.affiliation: Department of Psychology, University of Wurzburg, 97070 Würzburg, Germany. kiesel@uni-wuerzburg.de
authors.forename: Andrea
authors.initials: A
authors.lastname: Kiesel
authors.forename: Wilfried
authors.initials: W
authors.lastname: Kunde
authors.forename: Carsten
authors.initials: C
authors.lastname: Pohl
authors.forename: Michael P
authors.initials: MP
authors.lastname: Berner
authors.forename: Joachim
authors.initials: J
authors.lastname: Hoffmann
mesh_terms: D000293:Adolescent; D000328:Adult; D000704:Analysis of Variance; D004192:Discrimination, Psychological; D006801:Humans; D008875:Middle Aged; D010364:Pattern Recognition, Visual / Q000502:physiology*; D010775:Photic Stimulation / Q000379:methods; D010988:Play and Playthings / Q000523:psychology*; D011361:Professional Competence; D011930:Reaction Time / Q000502:physiology; D021641:Recognition, Psychology; D014473:Unconscious, Psychology; D055815:Young Adult