Data Archive of the Animal
Cognition Lab
Catalog Number: 0011
Title: Discrimination of what, when, and where in rats: Implications for episodic-like memory
Reference: Babb, S.J. & Crystal, J.D. (2005). Discrimination of what, when, and where in rats: Implications for episodic-like memory. Learning & Motivation, 36, 177-189.
Note: These data were reported by Babb & Crystal (2005). The rats had served (sessions 1-69) in a previous, related study (Babb & Crystal, 2003). In addition, the rats received pilot testing (sessions 84-98) to expose the rats to the contingency that chocolate replenished on multiple visits. Sessions 70-76 used a short retention interval (SRI), and sessions 77-83 used a long retention interval (LRI). Sessions 84-98 consisted of pilot testing. Sessions 99-110 were LRI, and sessions 111-120 were SRI. Sessions 121-163 used a randomly selected sequence of SRI and LRI (SRI sessions: 122, 125, 126, 128, 129, 130, 132, 134, 136, 137, 138, 140, 142, 146, 148, 150, 151, 152, 154, 158, 159, 160, 161, 163; LRI sessions: 121, 124, 127, 131, 133, 135, 139, 141, 143, 144, 145, 147, 149, 153, 155, 156, 157, 162). Probe testing occurred on sessions 164-166 using LRI (note that shift number is 2 for these files). The following files are not available because of technical data collection problems: HH102.073, session 123, and HH201.159.
ABSTRACT
We investigated the discrimination of what, when, and where in rats (n=5) using an eight-arm radial maze. Rats received daily training consisting of forced-choice visits to four baited arms, one of which was randomly chosen each day to contain chocolate (Phase 1). In Phase 2 all eight arms were available. After a short (30-min) retention interval (RI), the four arms that were not available in Phase 1 provided food. After a long (4-hr) RI, the four remaining arms plus the arm containing chocolate provided food (i.e., the chocolate arm replenished). The rats visited the chocolate location after the long RI more than after the short RI. Next, chocolate was paired with lithium chloride, and subsequent testing used the long RI. The rats visited the chocolate location less after the taste-aversion manipulation than in previous training, demonstrating knowledge of what, when, and where. Implications for episodic-like memory are discussed.
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Last updated 16 May 2005
