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1

The effect of a conspecific's scent on the exploratory behavior of rats

100%
Osinski J., Malinski D., Walasek N.
Polish Psychological Bulletin
|
2004
|
vol. 35
|
issue 2
105-108
EN
It is commonly assumed that the role of exploratory behaviors is essentially adaptive. One of the costs of exploration is the risk of exposure to factors reducing the chances of survival, therefore we might expect that the level of exploratory behavior is regulated according to the level of potential risk. In order to verify those assumptions, we conducted a study of rats' exploratory behavior in three environments: without a scent of another rat, with a scent of another rat, and with a scent of a resident rat. It was expected that the highest level of exploratory behavior would be demonstrated by the rats tested in the environment with a scent of another rat, and the lowest - by those tested in the environment marked by a resident. The results did not confirm those expectations. The lowest level of exploration was demonstrated by the animals tested in the environment devoid of another rat's scent. No significant statistical differences were observed between the remaining two groups. The results might suggest that the significance of another rat's scent should be considered in terms of information rather than emotional content.
2

Response to novelty in low-stress conditions in rats

80%
Pisula W.
Polish Psychological Bulletin
|
2004
|
vol. 35
|
issue 2
99-103
EN
Thirteen inbred August rats were tested in an exploration box. The box was divided into three zones: start zone, tunnel zone, and screen zone. All animals were familiarized with the experimental chamber by being placed there for consecutive days. Each daily session lasted nine minutes. In the eleventh session, the chamber was slightly changed. In the screen zone, a different visual pattern was displayed. In the tunnel zone, the arrangement of tunnels was changed. Rats responded to novelty with increased walking, object contacts, air sniffing, rearing, climbing, and decreased floor sniffing. Introducing novelty resulted in a shortened time spent in the start and tunnel zone, and prolonged time spent in the screen zone. The subjects showed no emotional response, such as: freezing, grooming, or burying. The role of changes in intensity, complexity and temporal dynamics is to be tested in the follow-up studies.
3

Play and Exploration in Animals — A Comparative Analysis

61%
Pisula W.
Polish Psychological Bulletin
|
2008
|
vol. 39
|
issue 2
104-107
EN
Exploratory behavior and play are very often discussed together. However, despite many similarities they are two distinct forms of behavior. They have different evolutionary histories and they develop in different ways. Both forms of behavior play a crucial role in the development of sophisticated and complex psyche. The paper discusses similarities and differences between exploration and play. The hypothesis of the joint development of exploration, play and animal intelligence is proposed.
4

Response to novelty in rats tested in isolation and in pairs: focus on exploration and play

61%
Tanas L., Stryjek R.
Polish Psychological Bulletin
|
2008
|
vol. 39
|
issue 2
81-88
EN
The main goal of the study was to compare investigatory responses towards novelty in 20 Wistar rats divided into two experimental groups (solitary exploration vs. exploration in pairs). Additionally, relationship between novelty and social play/interaction was analyzed in the dyad group. Procedure involved placing animals in an experimental chamber during fifteen, six minute trials on successive days of the study. On the eleventh session a new object was introduced. The results are summarized within several behavioral categories. Investigatory responses of rats in dyad to novel object in familiar environment were not quantitatively different, than those of isolated animals. The animals from both groups responded to the novel object by focusing their exploratory activity on the source of new stimulation. Amount of social play and social exploration was influenced by the experimental manipulation with important sex differences present.
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