Fig. 3.

Object–place (A), object–context (B), and object–place–context (C) recognition tasks as described by Langston and Wood (2010). The cylinder and cube represent two different objects. (A) In the sample phase of the object–place task, two different objects (green cube and orange cylinder) are presented to the rat. In the test phase, two objects of the same shape are presented in the same context, such that one object (the circled cube) is in a novel place. (B) In the sample 1 phase of the object–context task, two objects of the same shape are presented in spatial context 1. In the sample 2 phase, two copies of a different object are presented in spatial context 2 (denoted by the blue platform). The test condition maintains context 2 and swaps one object from context 2 with one object from context 1, such that one object (the circled cube) is in a novel object–context configuration. (C) In the sample 1 phase of the object–place–context recognition task, two different objects are presented in context 1. In the sample 2 phase, the context is changed and the object locations are swapped. The test condition returns to the original context and presents a copy of one object from the original context with one object from the second context in the place of the other object, such that one object (the circled cube) is in a novel object–place–context configuration. Typically, there is a two-minute latency between phases of each recognition experiment. (For interpretation of the references to color in this figure legend, the reader is referred to the web version of the article.)