PSYN 207_Chapter 5
Chapter Overview
Chapter 5 focuses on Evolutionary Psychology
Adapted slides from Professor Fisher (2022)
Presented by Dr. Zavala, Mercy University, Spring 2025
Key Topics in Evolutionary Psychology
Definition and scope of evolutionary psychology as a subfield
Rescorla-Wagner view of Pavlovian conditioning
Phenomena such as blocking, instinctive drift, and autoshaping
The role of surprise and prediction in learning
Biological constraints and preparedness in behavior
Addressing misconceptions about brain function
Overview of biofeedback and neurofeedback techniques
Definition of Evolutionary Psychology
Evolutionary Psychology: A field that examines the interplay between biology, genetics, and behavior at both individual and cultural levels.
Integrates concepts from classical and operant conditioning while emphasizing biological influences.
Addresses behaviors such as altruism, mate selection, and personality differences, highlighting that our psychological traits are evolutionary adaptations aimed at survival.
Proposes that human behaviors have evolved through natural selection.
Cautions Regarding Evolutionary Psychology
Acknowledges potential overemphasis on genetic determinants (nature) over environmental influences (nurture).
Evolutionary explanations sometimes lack empirical testing.
It aims to elucidate behaviors not readily explained by classical or operant conditioning theories.
Understanding Biofeedback
Biofeedback: A therapeutic procedure providing individuals with information about their biological functions to facilitate voluntary control over these functions.
Common metrics include heart rate, blood pressure, and brain activity.
Challenges previous beliefs that autonomic functions can only be conditioned through classical conditioning, demonstrating operant conditioning's role in learning these functions.
Mechanism of Biofeedback
Involves presenting a visual representation of an individual's autonomic functioning via a connected device.
Establishing a target for appropriate functioning, prompting specific responses when targets are hit (e.g., sounds or visual changes).
When focused on neurological functions, this is termed neurofeedback.
Applications of Biofeedback
Proven effective for reducing anxiety through self-monitoring of physiological responses.
For athletes: Improves performance by monitoring physiological metrics.
Assists children with ADHD and autism in enhancing focus via brain activity feedback.
TED Talk on Biofeedback
Discusses the potential of biofeedback in treating psychological effects post-concussion.
Offers a healthy alternative to medications for coping with depression, anxiety, and stress-related issues.
Taste Aversion Learning
Highlights that taste aversion is atypical in classical conditioning, as it can develop after a single instance of a negative experience (e.g., food poisoning).
Diverges from classical conditioning by not requiring overlap of stimuli presentation or allowing multiple neutral stimuli conditioning.
Suggests an evolutionary basis for rapid avoidance learning in response to harmful substances, enhancing survival.
Impediments in Classical Conditioning
Latent Inhibition: Previous neutral stimulus exposure without reinforcement can hinder future associations. Example: A rat exposed to a light before experiencing shock may not learn to fear that light.
Blocking: Prior learned associations can obstruct the establishment of new connections. For instance, if only one stimulus is paired initially, it diminishes the learning capacity of additional stimuli paired later with the same unconditioned stimulus.
Robert Rescorla's Contributions
Focused on the cognitive processes involved in classical conditioning.
Rescorla-Wagner Model: Explains how the strength of the CS-US association is impacted by the element of surprise in pairings.
Associative learning is more robust with lower surprise levels; less predictive information weakens conditioning.
Rescorla-Wagner Model (1972)
Illustrates the complexities behind classical conditioning beyond mere stimulus pairings.
The expectation of the unconditioned stimulus's occurrence based on classical cues (CS) plays a crucial role in shaping associative strength.
When multiple CSs exist, their individual associations weaken compared to a scenario with a sole CS.