Left hemisphere advantage for classical conditioning to auditory verbal CSs: Effects of nonattended extinction

Author(s): Hugdahl, K., Stormark, K. M., Hammerborg, D.

Journal/Book: Psychophysiology. 1997; 34: 1010 Vermont Ave NW, Suite 1100, Washington, DC 20005. Soc Psychophysiol Res. 566-571.

Abstract: The effects of brain laterality, or hemispheric asymmetry, on electrodermal classical conditioning during both attended and nonattended stimulus conditions were studied. Participants were conditioned to consonant-vowel (CV) syllables during an acquisition, or learning, phase of the experiment. During a subsequent extinction phase, the conditioned stimuli (CS) were presented in a dichotic mode of presentation. Half of the participants attended to the left ear (right hemisphere) during the extinction phase and the other half of the participants attended to the right ear (left hemisphere). The results showed effects of conditioning for all participants during the acquisition phase. During dichotic ex;tinction, the left hemisphere group showed remaining learning effects in both the attended and nonattended conditions, whereas the right hemisphere group demonstrated conditioning only in the attended condition.

Note: Article Hugdahl K, Univ Bergen, Dept Biol & Med Psychol, Arstadveien 21, N-5009 Bergen, NORWAY

Keyword(s): brain laterality; conditioning; hemispheric asymmetry; attention; dichotic listening; STIMULATION; RESPONSES; ASYMMETRY; WORDS; ERP

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