Classical Conditioning Study Notes

9.1 Classical Conditioning: Stimulus and Response

Definition: Classical conditioning is defined as a form of learning where a natural physiological response (like salivation) to a given stimulus (like food) is transferred to a neutral stimulus after repeated pairings.
Example: Smells associated with memories (e.g., holidays) can trigger emotional reactions due to classical conditioning.

Perception of Learning: Learning is characterized as a relatively long-term change in behavior or physiological responses due to previous experiences.
Exploration of Learning Forms: Psychologists have identified various forms of learning that will be discussed throughout this chapter.

Not originally a psychologist, Pavlov was trained as a physiologist and won the Nobel Prize for his work in physiology and medicine in 1904.
His early studies aimed to understand digestion, particularly involving salivation among dogs.

Initial Setup: Pavlov collected drool from dogs using a glass tube while giving them food to measure salivation.
Unexpected Findings: Instead of responding solely to food, dogs began salivating in response to anticipatory cues, like the sight of lab coats or the sound of footsteps, indicating they associated these signals with food.
Concept of Psychic Secretions: This prompted Pavlov to investigate how reflexive responses could be conditioned through environmental cues.

Training with Sound Cues: Pavlov utilized sounds (metronome, whistle, tuning fork, bell) to see if the dogs would salivate in anticipation. Initially, these sounds did not elicit salivation until repeated pairings with food.
Outcome: After conditioning, dogs began to salivate at the sound alone, demonstrating learning.

Unconditioned Stimulus (US): A stimulus that automatically triggers a response without prior learning (e.g., food).
Unconditioned Response (UR): An automatic response to the unconditioned stimulus (e.g., salivation when food is presented).
Neutral Stimulus (NS): A stimulus that does not elicit a response until conditioning occurs (e.g., sound of the tuning fork initially).
Conditioned Stimulus (CS): A previously neutral stimulus that, after repeated pairing with the unconditioned stimulus, elicits a conditioned response (e.g., the sound after conditioning).
Conditioned Response (CR): The learned response to the conditioned stimulus (e.g., salivating at the sound).

Definition: Acquisition is the phase where the unconditioned stimulus is repeatedly paired with the conditioned stimulus until the conditioned response is established.
Examples in Human Life: Smelling popcorn in a theater can trigger salivation due to previous associations with eating popcorn. Colors like red may elicit romantic feelings from repeated associations with love (e.g., Valentine's Day).

Definition: Extinction occurs when the conditioned stimulus is presented without the unconditioned stimulus leading to a decrease in the conditioned response (e.g., dogs salivating less after sounds without food).

Definition: After a period of rest, a previously extinguished conditioned response may suddenly reappear when the conditioned stimulus is presented again, though the response is typically weak.

Generalization: The tendency to respond similarly to stimuli that resemble the conditioned stimulus (e.g., dogs salivating to tones close to the original conditioned tone).
Discrimination: The ability to distinguish between different stimuli and respond only to specific cues (e.g., responding to a specific sound tone while ignoring others).

Celebrity Endorsements: Marketers leverage classical conditioning by pairing products with beloved celebrities to instill positive feelings (e.g., Taylor Swift endorsing a guitar brand).
Music in Advertising: Advertisers utilize music as an unconditioned stimulus to create emotional connections with products, as shown through research linking appealing music to positive product perceptions.
Sex Appeal in Ads: Advertisements often use sexual imagery to trigger positive responses tied to the product being sold by associating it with the attractiveness of models.

Concept: Often occurring in childhood, taste aversion (Garcia effect) refers to developing an aversion to specific foods after a single negative experience (e.g., getting sick after eating a new food).
Biological Preparedness: The phenomenon where certain pairings (like food and sickness) are learned faster due to their survival significance, illustrating selective attention to certain stimuli.

Conducted by John Watson and Rosalie Rayner in 1922, this study tested whether fear could be conditioned in infants.
Little Albert, an infant, was conditioned to fear a white rat by pairing its presence with loud, frightening noises.

Cruelty in Methodology: After establishing that Albert had no prior fear, loud noises were introduced to create fear associated with the white rat, demonstrating unethical research practices.
Outcomes: Watson and Rayner intended to teach Albert to discriminate different stimuli, but their study was halted when the mother intervened.

Uncertainty remains about whether the conditioning effects persisted into adulthood. Possible scenarios include lingering fears of animals or general trauma effects due to the unethical nature of the study.

Implications of Classical Conditioning: Classical conditioning plays a pivotal role in shaping behaviors, attitudes, and emotional responses through environmental stimuli, from common everyday associations to more complex psychological phenomena.