Classical conditioning: training subjects to respond to certain cues subconsciously, such as Pavlov's cue to his dog's salivary glands at the use of a bell.
Operant, or instrumental, conditioning: use of certain positive or negative results to effect certain conscious behavior changes, through positive reinforcement or avoidance of negative consequences.
Successful operant conditioning is usually so subtle as not to be noticed. If conditioning is noticed by an adult, understandable feelings of resentment will result, after feelings of being used.