NotesFAQContact Us
Collection
Advanced
Search Tips
Peer reviewed Peer reviewed
Direct linkDirect link
ERIC Number: EJ869806
Record Type: Journal
Publication Date: 2009-Nov
Pages: 14
Abstractor: As Provided
Reference Count: 0
ISBN: N/A
ISSN: ISSN-0023-9690
Interstimulus Interval and Delivery Cues Influence Timed Conditioned Responding in Rats
Williams, Douglas A.; Chubala, Chrissy M.; Mather, Amber A.; Johns, Kenneth W.
Learning and Motivation, v40 n4 p394-407 Nov 2009
Appetitive contextual excitation supported by intertrial unconditioned stimuli was more easily overcome by timed conditioned responding in rats using quiet (Experiment 1) rather than noisy (Experiment 2) food pellet deliveries. Head-entry responding in acquisition peaked above the contextual baseline when pellet delivery occurred 10, 30, 60, or 90 s after the onset of the 120-s white-noise conditioned stimulus (CS). Special tests in extinction revealed CS onset and offset were conditioned by pellet delivery at 0 and 120 s, respectively. Responding was not undermined in Experiment 3 when noisy pellet deliveries replaced quiet pellet deliveries. Our results suggest that micro-stimuli occasioned at different times during the CS are vulnerable to overshadowing, but do not lose strength if they are already predictive. (Contains 4 figures and 1 table.)
Elsevier. 6277 Sea Harbor Drive, Orlando, FL 32887-4800. Tel: 877-839-7126; Tel: 407-345-4020; Fax: 407-363-1354; e-mail: usjcs@elsevier.com; Web site: http://www.elsevier.com
Publication Type: Journal Articles; Reports - Research
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A