4.2 Classical Conditioning 0 4.2.2 Main ideas and concepts o After training: presenting Cs(ringing the bell) produces Cr(salivation) o UR and cr are always the same kind of response. The magnitude of the cr is always less than that of the ur x experimental extinction: when a cs no longer elicits a Cr, experimental extinction is said to occurr lt results when the cs is presented to the organism and is not followed by reinforcement(UCS).4.2 Classical Conditioning ⚫ 4.2.2 Main ideas and concepts ⚫ After training: presenting CS(ringing the bell) produces CR(salivation) ⚫ UR and CR are always the same kind of response.The magnitude of the CR is always less than that of the UR ⚫ ＊experimental extinction: when a CS no longer elicits a CR, experimental extinction is said to occurr.It results when the CS is presented to the organism and is not followed by reinforcement(UCS)