History of the Sprague Dawley Rat. In thinking out our original experiment, we wanted to add a stage where the rats were in the tank together without the screen. There would be one pile of food and both their boxes would be in the tank. Unfortunately, we ran out of time to do a real test on this. We did however, do one trial just to see what would happen. The results were very interesting. You can see that al.

We have now officially finished our experiment. The last few days of our data collection showed that giving the rats an activity to do between bar presses did actually help them wait. Below are graphs comparing the phases of our experiment, as well as how each rat day each day of the phase. Below is a list of references used for our study.

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