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code📚 Evolutionary Psychology ├── 📖 Chapter 1: Historical and Conceptual Foundations │ ├── 🔹 The Evolution of Psychological Thought │ ├── 🔹 Core Mechanisms of Natural Selection │ └── 🔹 Misunderstandings and Criticisms ├── 📖 Chapter 2: The New Science of Evolutionary Psychology │ ├── 🔹 Scientific Synthesis and Methodology │ ├── 🔹 Proximate vs. Ultimate Explanations │ └── 🔹 Products of Evolution and the EEA ├── 📖 Chapter 3: Survival Adaptations - Food and Pathogens │ ├── 🔹 Food Selection and Folk Biology │ ├── 🔹 Behavioral Immune System and Disgust │ └── 🔹 Specialized Survival Hypotheses ├── 📖 Chapter 4: Hunting, Gathering, and Habitat Selection │ ├── 🔹 Hunting vs. Gathering Hypotheses │ ├── 🔹 Sex Differences in Spatial Abilities │ └── 🔹 Habitat Selection and Savanna Hypothesis ├── 📖 Chapter 5: Fear, Predators, and Perceptual Biases │ ├── 🔹 Functional Defenses and Fear Sequence │ ├── 🔹 Perceptual Biases and Error Management Theory │ └── 🔹 Children's Antipredator Adaptations └── 📖 Chapter 6: Darwinian Medicine and Life Transitions ├── 🔹 Darwinian Medicine (Fever and Iron) ├── 🔹 The Theory of Senescence └── 🔹 Evolutionary Perspectives on Suicide and Homicide
What this chapter covers: This chapter traces the transition from Radical Behaviorism to the Cognitive Revolution, establishing evolutionary psychology as the fulfillment of Darwin's prediction. It defines the three essential ingredients of natural selection: variation, inheritance, and differential reproduction. The material clarifies that selection applies to psychological mechanisms designed to solve ancestral adaptive problems. Finally, it debunks common myths like genetic determinism and the "just-so story" critique.
| Concept/Principle | Definition/Explanation | Applications | Exam Relevance |
|---|---|---|---|
| Radical Behaviorism | View of the mind as a "black box" focusing only on observable stimuli/responses. | Explaining simple conditioning. | Contrast with Cognitive Rev. |
| Natural Selection | Non-random process of variation, inheritance, and differential reproduction. | Explaining complex trait design. | Define the 3 ingredients. |
| Genetic Determinism | The false belief that genes dictate behavior without environmental input. | Used as a "straw man" argument. | Debunking with callus example. |
| Adaptive Problem | Recurrent ancestral challenges related to survival or reproduction. | Identifying the "why" of a trait. | Linking traits to problems. |
Problem Type A: Identifying Selection Ingredients
Setup: "When you encounter a scenario describing a trait spreading through a population."
Method: Verify if there is Variation (differences exist), Inheritance (passed to offspring), and Differential Reproduction (trait helps survival/mating).
Example: Fast-running gazelles survive cheetahs (Variation), pass speed to fawns (Inheritance), and out-reproduce slow gazelles (Differential Reproduction).
Problem Type B: Debunking Determinism
Setup: "If given a prompt claiming 'If it's evolutionary, we can't change it'."
Method: Use the interactionist perspective. Explain that mechanisms require environmental triggers.
Example: Calluses are evolved, but only appear if the skin experiences friction (environment).
Problem: Explain why Radical Behaviorism failed to account for "one-trial learning" in food aversions.
Given: Behaviorism suggests learning requires repeated reinforcement/pairing.
Steps:
"✅Answer: Behaviorism's "black box" ignored internal biological preparedness; evolutionary psychology explains it as an adaptive survival mechanism.
❌ Mistake 1: Confusing "Descriptive" with "Normative"
✅ How to avoid: Remember evolution explains why things are (descriptive), not if they are "good" (moral).
❌ Mistake 2: Believing evolution implies immutability.
✅ How to avoid: Note that evolved mechanisms are context-sensitive and flexible.
Focus on the Callus Example. It is the ultimate "silver bullet" for exam questions asking about genetic determinism or nature vs. nurture.
What this chapter covers: This chapter defines the field as a synthesis of evolutionary biology and cognitive psychology. It introduces the distinction between proximate (how) and ultimate (why) explanations. It details the three products of evolution: adaptations, by-products, and noise. Additionally, it defines the Environment of Evolutionary Adaptedness (EEA) as a statistical composite of selection pressures.
| Concept/Principle | Definition/Explanation | Applications | Exam Relevance |
|---|---|---|---|
| Ultimate Explanation | The adaptive function of a trait (the "why"). | Explaining why jealousy exists. | Distinguish from Proximate. |
| EEA | Statistical composite of selection pressures shaping a trait. | Understanding "mismatches." | Defining ancestral context. |
| By-product | A trait with no function, carried along with an adaptation. | The belly button. | Differentiate from Adaptation. |
| Top-down Approach | Theory-driven hypothesis generation. | Testing Parental Investment Theory. | Compare with Bottom-up. |
Problem Type A: Proximate vs. Ultimate
Setup: "When asked to categorize an explanation for a behavior."
Method: If it mentions hormones, brain states, or immediate triggers, it's Proximate. If it mentions survival/reproductive success, it's Ultimate.
Example: "I eat sugar because it tastes good" (Proximate) vs. "I eat sugar because it provided dense calories for ancestors" (Ultimate).
Problem Type B: Identifying Products of Evolution
Setup: "If given a trait like 'the sound of a heartbeat' or 'the umbilical cord'."
Method: Check for "special design" (Adaptation), "functional necessity of another part" (By-product), or "randomness" (Noise).
Example: Umbilical cord = Adaptation; Belly button = By-product.
Problem: Apply the Top-down approach to study mate guarding.
Given: Theory: Parental Investment Theory (females invest more, so males compete/guard).
Steps:
"✅Answer: This theory-driven process moves from general biological principles to specific psychological predictions.
❌ Mistake 1: Thinking the EEA is a specific time or place.
✅ How to avoid: Define it as a statistical composite of pressures, unique to each adaptation.
When distinguishing between Adaptations and By-products, look for "Special Design." If it's efficient, precise, and reliable, it’s an adaptation.
What this chapter covers: This chapter explores how humans navigate the "omnivore's dilemma" using folk biology and evolved taste preferences (sweet vs. bitter). It introduces the Behavioral Immune System, centered on the emotion of disgust. Specific survival hypotheses—Pregnancy Sickness, Cooking, and the Antimicrobial (Spice) hypothesis—are analyzed as solutions to pathogen and toxin threats.
| Concept/Principle | Definition/Explanation | Applications | Exam Relevance |
|---|---|---|---|
| Folk Biology | Intuitive categorization of living things by "essence." | Identifying safe vs. toxic plants. | Universal cognitive tool. |
| Neophobia | Fear of new foods, especially in children. | Preventing accidental poisoning. | Developmental survival trait. |
| Behavioral Immune System | Psychological mechanisms (disgust) to avoid pathogens. | Avoiding feces or rotting meat. | Disease-avoidance hypothesis. |
| Antimicrobial Hypoth. | Spices are used to kill/inhibit bacteria in food. | Use of garlic/onion in hot climates. | Cultural/Ecological patterns. |
Problem Type A: Analyzing Spice Use
Setup: "When asked why people in India use more spices than people in Norway."
Method: Link climate (heat) to food spoilage (bacteria) and spices to antimicrobial properties.
Example: Meat in hot climates spoils faster; spices like oregano kill 100% of bacteria, solving the survival problem.
Problem Type B: Explaining Pregnancy Sickness
Setup: "If asked why 'morning sickness' is actually beneficial."
Method: Identify the first trimester as the period of organogenesis (vulnerability) and sickness as a shield against teratogens.
Example: Aversions to meat and coffee protect the embryo from toxins.
Problem: Why do women generally score higher on disgust scales than men?
Given: Historical roles in childcare and food preparation.
Steps:
"✅Answer: Women’s higher disgust is an adaptive response to their roles as primary caregivers and food preparers.
❌ Mistake 1: Thinking disgust is a "broken" system when we feel it for non-contagious things.
✅ How to avoid: Apply Error Management Theory—it is better to be "grossed out" by something harmless than to ignore something deadly.
Memorize the Hadza Honey example. It proves that the "Sweet Preference" is a universal adaptation for high-density calories, not just a modern cultural habit.
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