The Cover-Stimulus Effect: Role of Similarity in Durations of the CS and Cover Cues.
Pigeons were exposed to a random relation between a conditioned stimulus (CS) and an unconditioned stimulus (US) under the signaled random procedure. All US presentations that were unpaired with the CS were preceded by a second cue, a cover stimulus. Consistent with prior studies, the signaled rando...
| Publicado en: | Psychological Record Vol. 54; no. 2; pp. 293 - 318 |
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| Autores principales: | , , |
| Formato: | Artículo |
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Psychological Record
Spring2004
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| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ssf&AN=507901699&site=ehost-live header: @attributes: shortDbName: ssf uiTerm: 507901699 longDbName: Social Sciences Full Text (H.W. Wilson) uiTag: AN controlInfo: bkinfo: jinfo: jid: 00332933 PSD jtl: Psychological Record issn: 00332933 maglogo: N pubinfo: dt: Spring2004 vid: 54 iid: 2 pid: 761 pub: Psychological Record artinfo: ui: 507901699 ppf: 293 ppct: 25 formats: fmt: – @attributes: type: T – @attributes: type: P size: 3.3MB tig: atl: The Cover-Stimulus Effect: Role of Similarity in Durations of the CS and Cover Cues. aug: au: Jakubow, James J. Brown, Bruce L. Hemmes, Nancy S. su: Stimulus duration Pigeon behavior Stimulus & response (Biology) Prompts (Psychology) sug: subj: Stimulus duration Pigeon behavior Stimulus & response (Biology) Prompts (Psychology) ab: Pigeons were exposed to a random relation between a conditioned stimulus (CS) and an unconditioned stimulus (US) under the signaled random procedure. All US presentations that were unpaired with the CS were preceded by a second cue, a cover stimulus. Consistent with prior studies, the signaled random procedure supported responding during the CS; however, magnitude of this cover-stimulus effect varied with the duration of the CS relative to the cover-stimulus duration. Higher levels of responding were maintained when the CS and cover stimulus were equal versus unequal in duration. Experiment 1 provides a systematic replication of a study by Williams (1994), who used rat subjects. Higher levels of CS-directed responding were maintained when the cover stimulus was equal in duration to the CS versus when it was shorter. Experiment 2 provides the first demonstration of the effects of cover-stimulus durations that are both longer and shorter than the CS duration, compared to a procedure in which the durations are equivalent. In support of a stimulus-duration-equality effect, level of responding was higher for all equal stimulus-duration groups in comparison to unequal stimulus-duration comparison groups. These effects were accommodated by a common-elements generalization approach to the Rescorla-Wagner model. Reprinted by permission of the publisher. pubtype: Academic Journal doctype: Article src: R language: English refInfo: copyright: @attributes: flag: N holdings: @attributes: islocal: N |
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