This lab report explores classical conditioning, specifically aversive conditioning, in a classroom setting. The study involves three students from the class, including two girls and one boy. One girl reads words aloud while another girl closes her eyes, and a third student bursts balloons upon hearing the word 'can.' The experiment consists of four parts: initial balloon bursting, no balloon bursting with presence of the word 'can,' absence of the word 'can' without balloon bursting, and final presentation of the word 'can' without balloon bursting. The report aims to investigate whether classical conditioning was demonstrated, identify the unconditioned stimulus (US), unconditioned response (UR), conditioned stimulus (CS), and conditioned response (CR). Additionally, it will examine if stimulus generalization, discrimination, or extinction occurred during the experiment.