in an experiment laboratory rats were classically conditioned

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1. Experimental groups. The rats were randomly assigned to six groups. The

   

2. Rat In Lab. Animal Experiments Royalty Free Stock Image

   

3. In experiment 2, nulliparous and primiparous rats were conditioned with

   

4. Rat experiment

   

5. Freaky New Experiments Confirm Old Theory About Memory Formation

   

6. The Curt Richter rat experiment In the 1950s, university professor Curt