Welcome to the Great Debates of Psychology!
In your Psychology AS Level journey, you don't just learn what psychologists found; you learn how to argue about it. The "Debates" chapter is your toolkit for evaluating research. Think of these debates as the "big questions" that psychologists have been arguing about for over a hundred years. By understanding these, you can look at any study—like Milgram’s obedience study or Bandura’s Bobo doll experiment—and see the deeper meaning behind the results.
Note: This chapter is part of the "Areas, perspectives, debates and applications" section. It works closely with the "Areas of psychology" and "Perspectives" chapters, so keep those in mind as we go!
1. The Nature vs. Nurture Debate
This is perhaps the most famous debate in psychology. It asks: Are we born the way we are (Nature), or do we become who we are because of our experiences (Nurture)?
The Nature Position: This side argues that our behavior is the result of innate (in-born) factors like genetics, brain structure, and biological chemistry.
Example Research: Casey et al. (2011) explored the biological side of delay of gratification. They found that different activity in the brain (the ventral striatum and prefrontal cortex) could predict if someone was a "high delayer" or a "low delayer." This suggests our ability to resist temptation has a strong biological basis.
The Nurture Position: This side argues that we are born as a "blank slate" and our environment, upbringing, and learning shape us.
Example Research: Bandura et al. (1961) showed that children who watched an adult being aggressive toward a Bobo doll were more likely to be aggressive themselves. This suggests behavior is learned through observation and imitation (the environment).
Applications: If we believe behavior is nurture-based, we can change it through better education or parenting (like the Chaney et al. Funhaler study). If it is nature-based, we might look at medical or biological interventions.
Quick Review: Nature = Biology/Genetics. Nurture = Environment/Learning.
2. Freewill vs. Determinism
Do you choose your own actions, or are they decided for you by forces outside your control?
Freewill: The idea that humans have the power to make choices and that their behavior is not predictable.
Determinism: The idea that all behavior has a cause. If we knew all the causes, we could predict exactly what a person would do.
- Biological Determinism: Your brain or genes decide for you (e.g., Sperry’s split-brain patients couldn't "choose" to name an object seen in the left visual field because of their brain structure).
- Environmental Determinism: Your surroundings decide for you (e.g., Milgram’s participants were "determined" to obey because of the pressure of the authority figure and the lab setting).
Comparison: This debate is similar to Nature/Nurture. Determinism is often used to make psychology more scientific because science looks for "cause and effect" (\(Cause \implies Effect\)).
3. Reductionism vs. Holism
This debate is about how we explain behavior. Should we break it down into tiny pieces, or look at the "whole person"?
Reductionism: The belief that complex behavior can be explained by breaking it down into simple parts.
Strength: It is very scientific and allows for clear testing.
Example Research: Baron-Cohen et al. (1997) is reductionist because it explains the social difficulties of people with autism using one specific factor: "Theory of Mind" (the ability to understand others' thoughts).
Holism: The belief that human behavior is too complex to be broken down. We must look at the whole person, including their history and emotions.
Example Research: Freud (1909) and his study of "Little Hans" is holistic. He didn't just look at one variable; he looked at Hans’s dreams, his family relationships, his phobias, and his childhood development.
Key Takeaway: Reductionism is like looking at the individual bricks of a house; Holism is like looking at the whole building and its history.
4. Individual vs. Situational Explanations
Why did someone act that way? Was it because of who they are, or where they were?
Individual (Dispositional) Explanations: Behavior is caused by the person’s personality, character, or unique traits.
Situational Explanations: Behavior is caused by the environment, the people around us, or the specific circumstances we are in.
Example Research: In Milgram’s (1963) study, he found that ordinary people would give lethal electric shocks because of the situation (an authority figure in a prestigious university). However, Bocchiaro et al. (2012) also looked at individual factors, finding that while most people obeyed the situation, personality didn't strongly predict who would whistle-blow, though some individual faith/values played a small role.
Did you know? Many people make the "Fundamental Attribution Error"—we tend to blame people's individual personality for their mistakes while ignoring the situation they were in!
5. Usefulness of Research
Is the research actually helpful to society? Psychologists ask if their work has practical applications.
What makes research useful?
1. It furthers our understanding of a topic.
2. It can be applied to real-world problems (e.g., in schools, hospitals, or courts).
Example Research:
- Loftus and Palmer (1974) is highly useful because it showed that leading questions can distort memory. This changed how police interview witnesses!
- Chaney et al. (2004) is useful because it showed how to improve health in children by making medical devices (the Funhaler) more fun to use.
Quick Review: Useful research helps us solve problems or changes how we think about the world.
6. Ethical Considerations
Psychologists must follow strict rules to protect participants. In your exam, you should refer to the British Psychological Society (BPS) Code of Ethics, which focuses on: Respect, Competence, Responsibility, and Integrity.
Key Ethical Issues:
- Informed Consent: Did the person agree to take part knowing all the facts?
- Deception: Were they lied to? (e.g., Milgram lied about the shocks).
- Protection of Participants: Were they harmed physically or mentally?
- Right to Withdraw: Could they leave at any time?
- Confidentiality: Is their data kept private?
- Debrief: Were they told the truth after the study?
Example: Milgram (1963) is often criticized for being unethical because participants were under extreme stress (lack of protection) and were deceived. However, he argued it was necessary to get valid results.
7. Conducting Socially Sensitive Research
Some research is "sensitive" because it deals with topics that could lead to stigma, discrimination, or changes in government policy that might harm a specific group of people.
Examples of Sensitive Topics: Intelligence, race, mental disorders, or criminal behavior.
Example Research: Baron-Cohen et al. (1997) is socially sensitive because it creates a "test" for autism (the Eyes Task). While helpful for diagnosis, it also "labels" people, which can affect how they are treated by society.
The Balance: Psychologists shouldn't avoid these topics, but they must be very careful about how they report their findings so they don't cause harm to the groups they are studying.
8. Psychology as a Science
Should psychology be treated the same way as biology, chemistry, or physics? To be a "science," research should meet these criteria:
1. Replicability: Can the study be repeated exactly to see if the results are the same? (e.g., Loftus and Palmer’s lab experiment is easy to replicate).
2. Objectivity: Is the research free from personal bias? (Quantitative data, like scores on a test, is more objective).
3. Falsification: Can the theory be proven wrong?
4. Control and Standardisation: Were all participants treated the same way? (e.g., Grant et al. used the same silent/noisy conditions for their memory test).
Comparison: Research like Sperry or Casey (Biological) is very scientific. Research like Freud is often seen as unscientific because it is subjective and impossible to prove wrong (not falsifiable).
Summary Table for Revision
Debate: Nature vs. Nurture
Key Question: Genes or Environment?
Core Study Example: Casey (Nature) vs. Bandura (Nurture)
Debate: Freewill vs. Determinism
Key Question: Choice or Caused?
Core Study Example: Milgram (Situational Determinism)
Debate: Reductionism vs. Holism
Key Question: Parts or Whole?
Core Study Example: Baron-Cohen (Reductionist) vs. Freud (Holistic)
Debate: Psychology as a Science
Key Question: Objective and Replicable?
Core Study Example: Loftus & Palmer (Scientific) vs. Freud (Less Scientific)
Don't worry if these seem tricky at first! The best way to learn them is to practice applying them to your 10 core studies. Every time you read a study, ask yourself: "Is this nature or nurture? Is it scientific? Is it ethical?"