Learning is an action or experience to achieve knowledge. Every learning process comes from education and study. Aims for behavior modification that is permanent. Learning theories are defined as “attempts to systematize and organize what is known about human learning” (Lefrancois, 2011, p.25). Generally, learning can be classified into three types: classical conditioning, operant conditioning, and cognitive learning (refer to Figure 1 in Appendix 1). The first type of learning is classical conditioning. This conditioning involves the association of two stimuli, namely the unconditioned stimulus (US) and the conditioned stimulus (CS). This type of conditioning contains three phases during the learning process. The first phase is the pre-learning phase, in which the US triggers an unconditioned response (UR), the response is an unlearned behavior. Meanwhile, the neutral stimulus (NS) does not trigger any reaction. Secondly, the acquisition phase is carried out. Both US and NS are applied together to stimulate a UR. Finally, the post-learning phase is achieved when NS explicit CR, UR is now considered as conditioned stimulus (CR) in this phase. Ivan Pavlov had conducted an experiment regarding this discovery of classical conditioning. According to Pavlov's (1927) research, the click sound of the metronome (NS) did not stimulate the dog's salivation, but the powdered food (US) made the dog salivate (UR) (as cited in Tarpy, 1997, p .44). However, when both the ticking sound and the powdered food were repeatedly presented to the dog at the same time, the dog salivated (UR). Finally, the dog salivated (CR) when only the metronome click sound (CS) was presented (Pavlov cited in Tarpy, 1997, p. 44). This experiment showed...... half of the paper...... (1987). Negative reinforcement in applied behavior analysis: An emerging technology. Journal of Applied Behavior Analysis, 20, 361-378.Lawson, R. & Watson, L. S., Jr. (1963). Positive reinforcement vs. negative with controlled incentive conditions. The Ohio Journal of Science, 63(2), 87-91.Lefrancois, G. (2011). Human learning theories: What the professor said (6th ed.). Belmont: CA. Retrieved from http://books.google.com.my/books?id=SH8DlhiY8QMCShuell, T. J. (1986). Cognitive conceptions of learning. Educational Research Review, 56(4),411-436. Tarpy, R. M. (1997). Contemporary learning theory and research. New York, NY: McGraw-Hill.Wade, C. & Tavris, C. (2005). Invitation to psychology (3rd ed.). Upper Saddle River, NJ: Pearson.Wood, S.E., Wood, E.G. & Boyd, D. (2006). Mastering the world of psychology (2nd ed.). Boston, MA: Pearson.