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Extinction of a Conditioned stimulation Essay mannerIn this experiment, an untrained hind end was utilized in order to display the Movement Ratio. 1 peg was selected with ten (10) trials. apiece trial had a five (5) minute interval between trials to allow the rat to recover from the medium brashness shock. A medium intensity lumber was selected as the Conditioned Stimulus (CS) selected to precede the categorical Stimulus (US), a medium intensity shock. Stage 2 was selected with thirty (30) trials. Each had a five (5) minute interval between trials to allow the rat to recover from the medium intensity shock. A medium intensity tone was selected as the Conditioned Stimulus (CS) to precede the new Unconditioned Stimulus (US), no stimulus.HypothesisIn the first association of trials, Sniffy will learn to affiliate the tone with shock illustrating fear-related behavior or freezing behavior at the tone. In the reciprocal ohm lay out of trials, stage 2, elimination of a cond itioned response (CR) (freezing or fear-related behavior) learned in the first set of trials will occur by repeatedly presenting the CS without the US.ResultsIn the first set of trials the increase from 0 to 0.7 in the Movement Ratio illustrates that the tone CS, is acquiring the capacity to induce freezing behavior and new(prenominal) fear-related behaviors. As the movement dimension increases, the CS response strength mind window show that the tones capacity to elicit fear as a psychological process is increasing. In the secant set of trials the movement ratio window illustrates that repeatedly presenting the CS without the US causes the CS to gradually full stop eliciting the freezing and other fear-related behavior.The CS Response Strength mind window shows that this behaviors change is the result of the CSs losing its capacity to elicit the fear response. Independent Variable (IV) first trial = shock second trail = none Dependent variable (DV) first and second fear-relate d behavior, freezing behavior The movement ratio is the proportion of time during each CS presentation that Sniffy is frozen or manifesting other fear-related behaviors.