Hart_Assignment 4 (1)

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Jan 9, 2024

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CyberRat - LAB #3 (Assignment 4) NAME: _Monee Hart___ Part 1: FR40 Summary Questions 1. Paste a screenshot of your graph set below. 1

CyberRat - LAB #3 (Assignment 4) 2. Describe any differences in the level and pattern of lever pressing as you gradually increased the schedule value, as seen in the graph posted for question #1. As I made the level steadily increase the schedule value, the graph inclined to go higher in numbers, meaning when I increased the schedule value, it caused an increase in the number of times the rat in the experiment pressed the lever. 2

CyberRat - LAB #3 (Assignment 4) 3. Define ratio strain. Did you notice any evidence of ratio strain as you attempted to gradually increase the FR schedule? If you DID experience ratio strain, what do you think went wrong? If you DID NOT experience ratio strain, what did you do to prevent it from happening? ( Make sure to review the lecture and textbook on Schedules of Reinforcement to make sure you know what is meant by "ratio strain.") Ratio strain is the number of times something has to happen to produce the same response that was once created at a lower requirement, an extended pause after reinforcement, or during a run of responses. In this test, I tried to slowly and gradually increase the FR schedule, and the ratio strain increased in certain spots where I noticed on the graph that there was an extended period the higher I placed the FR schedule. I tried to do the schedule in 3 increments, and when I got closer to 40, I think I should have done two or maybe one increment instead of 3 so as not to experience a ratio strain, especially towards the end. By doing that, the FR schedule was a little too quick for the rat to maintain the right behaviors. Next time, toward the end, I will increase it to an even smaller amount to avoid a long pause. Part 2: Extinction Extinction Minutes Lever Presses 1 IIIIIIIIIIIIIIIIIIIIIIIIIIII (28) 2 IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII (36) 3 IIII (4) 4 IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII (35) 5 I (1) 6 IIIIIIIIIIIIIIII (16) 7 IIIIIIIIIIIIIIIIIIIIIIIIII (26) 3

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CyberRat - LAB #3 (Assignment 4) 8 IIIIIII (7) 9 IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII (34) 10 IIIIII (6) Summary Questions Examine the frequency data that you collected in your data table above and in the extinction data table from the Lab #2 worksheet: 1. How many times did your rat press the lever during the first 10-minute extinction session in Lab #2 (when extinction followed CRF)? __63_____ 2. How many times did your rat press the lever during the first 10-minute extinction session in this lab (when extinction followed FR 40)? ____193_____ 3. How many sessions (experiments) did it take your rat to reach the extinction criterion in Lab #2 (i.e., press two or fewer times in an entire 10-minute session)? _______3____ 4. How many sessions (experiments) did it take your rat to reach the extinction criterion in this lab (i.e., press two or fewer times in an entire 10-min session)___10_______ 5. Compare your answers for questions #1 and #2 and #3 and #4. Why are there differences between extinction on CRF versus Intermittent schedules? Which schedule (CRF vs. FR40) results in greater resistance to extinction? (Make sure to refer to the book and lecture where differences in extinction are discussed.) When you compare the results from questions 1 and 2 and questions 3 and 4, the FR40 results are much greater than the CRF results. I experimented in an appropriate number order because my organism increased the number of lever presses she did during each session as I increased the FR schedule. 4

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