Content

Welcome to Pearson Edexcel AS Psychology (8PS0)!

Welcome to your study journey! Psychology is the scientific study of the mind and behavior. In these notes, we are going to explore the core Content of your course. We will look at why we obey authority, how our memory works, how our biology influences our aggression, and how we learn from our environment. Don't worry if some of this seems like a lot to take in at first—we will break it down step-by-step!

Topic 1: Social Psychology

Social psychology is all about how the people around us influence our behavior. It focuses on our relationships with others and how being part of a group changes how we act.

1. Obedience: Why do we follow orders?

Obedience happens when you follow a direct order from an authority figure (like a teacher, police officer, or boss). There are two main theories you need to know:

1. Agency Theory (Milgram): Milgram suggested we have two "states" of being:
- Autonomous State: You feel responsible for your own actions and follow your own conscience.
- Agentic State: You see yourself as an "agent" for someone else. You follow their orders and feel they are responsible for the outcome, not you.
- Moral Strain: This is the uncomfortable feeling you get when you are asked to do something you think is wrong.

2. Social Impact Theory (Latané): This theory uses a mathematical approach to explain how "social forces" influence us. Think of it like a lightbulb shining on a target. The impact depends on:
- Strength: How much authority or power the person has.
- Immediacy: How close the person is to you (physical distance or time).
- Number: How many people are putting pressure on you.

Analogy: Imagine a single teacher (Strength) standing right next to you (Immediacy) telling you to sit down. You are much more likely to obey than if a random stranger shouted it from across a football field!

2. Prejudice: Why do groups dislike each other?

Prejudice is a fixed, often negative, attitude toward a group of people.

Social Identity Theory (Tajfel and Turner): This theory says that simply being in a group is enough to cause prejudice. It happens in three steps:
1. Social Categorization: We put people into "us" (the In-group) and "them" (the Out-group).
2. Social Identification: We adopt the identity of our in-group (wearing the team shirt, acting like them).
3. Social Comparison: To make ourselves feel better, we talk "our" group up and put the "other" group down.

Realistic Conflict Theory (Sherif): This theory says prejudice happens when two groups are competing for limited resources (like a trophy, a job, or territory). When there isn't enough to go around, conflict starts.

Quick Review:
- Obedience: Following orders (Agency Theory/Social Impact Theory).
- Prejudice: Negative attitudes (Social Identity Theory/Realistic Conflict Theory).
- Key Term: Dissent: Choosing not to obey an order.

Key Takeaway: Social psychology shows us that our behavior is often a result of our environment and the people around us, rather than just our personality.

Topic 2: Cognitive Psychology

Cognitive psychology looks at the mind as if it were a computer. It studies how we "input" information, "process" it (thinking/memory), and "output" it (behavior).

1. The Multi-Store Model of Memory (Atkinson and Shiffrin)

This is the "original" model that says memory flows through three separate stores:
1. Sensory Register: Information from your senses (eyes, ears). It only lasts for a fraction of a second.
2. Short-Term Memory (STM): If you pay attention, info moves here. It holds about 7 items and lasts around 30 seconds.
3. Long-Term Memory (LTM): If you rehearse (repeat) the info, it stays here forever. It has unlimited capacity.

2. The Working Memory Model (Baddeley and Hitch)

Baddeley and Hitch thought STM was more complex than just one "box." They suggested it has different parts for different tasks:
- Central Executive: The "Boss" that decides what to pay attention to.
- Phonological Loop: Deals with spoken and written material (the "inner ear").
- Visuo-spatial Sketchpad: Deals with what things look like and where they are (the "inner eye").
- Episodic Buffer: Links information across the different parts to form a single "episode" of memory.

Analogy: Working memory is like a mental workbench. You can only fit a few things on it at once, and if you try to do two visual tasks at the same time, you might drop something!

3. Explaining Long-Term Memory (Tulving)

Tulving suggested LTM isn't just one thing. He identified:
- Episodic Memory: Your "autobiography." Memories of events (your 10th birthday).
- Semantic Memory: Your "encyclopedia." Facts and meanings (knowing that Paris is the capital of France).

Quick Review:
- Encoding: Turning sensory info into a form the brain can store.
- Capacity: How much info a store can hold.
- Duration: How long the info lasts.
- Reconstructive Memory: Bartlett's idea that we don't remember things like a video; we use schemas (mental shortcuts) to "rebuild" the memory, which can lead to mistakes.

Key Takeaway: Memory is an active process. We don't just record things; we process, store, and sometimes accidentally change them!

Topic 3: Biological Psychology

This area looks at how our physical bodies—our brains, chemicals, and genes—make us who we are. We focus specifically on aggression.

1. The Brain and Aggression

Different parts of the brain have different jobs:
- Pre-frontal Cortex: This is the "brakes" of the brain. It controls impulses and decision-making. If it's damaged, a person might become more aggressive because they can't stop their impulses.
- Amygdala: This is the "emotional center." It processes fear and anger. Overactive amygdalas are linked to higher aggression.

2. Neurons and Neurotransmitters

The brain sends messages using neurons (nerve cells). The gap between them is called a synapse. Chemicals called neurotransmitters carry the message across.
- Serotonin: Often called the "happy chemical." Low levels are linked to increased aggression.
- Dopamine: The "reward" chemical. High levels are linked to aggression as a way of getting what we want.

Step-by-Step: Synaptic Transmission
1. An electrical impulse travels down the neuron.
2. It triggers the release of neurotransmitters into the synapse.
3. The chemicals lock into "receptors" on the next neuron like a key in a lock.
4. The message is passed on!

3. Hormones and Evolution

Testosterone: This male sex hormone is strongly linked to aggression. Research shows that higher testosterone levels often correlate with more violent behavior.
Evolution: Psychologists argue that aggression was once useful for survival. It helped our ancestors protect their food, territory, and mates. Those who were "successfully aggressive" survived and passed those genes on to us.

Did you know? Charles Darwin’s theory of Natural Selection suggests that traits that help us survive are "selected" by nature to stay in our DNA.

Key Takeaway: Biology provides the "hardware" for our behavior. Aggression can be explained by brain structure, chemical imbalances, or evolutionary survival needs.

Topic 4: Learning Theories

Learning theories focus only on behavior that can be observed. They suggest we are born as "blank slates" and everything we do is learned from our environment.

1. Classical Conditioning (Learning by Association)

Discovered by Pavlov and his dogs. It’s about learning to react to a neutral stimulus because it’s been paired with something else.
- Unconditioned Stimulus (UCS): Something that naturally causes a reaction (food).
- Unconditioned Response (UCR): The natural reaction (drooling).
- Neutral Stimulus (NS): Something that causes no reaction (a bell).
- Conditioned Stimulus (CS): The NS after it has been paired with the UCS. Now the bell causes drooling!
- Conditioned Response (CR): The learned reaction to the CS.

2. Operant Conditioning (Learning by Consequences)

This is about rewards and punishments. Skinner is the key name here.
- Positive Reinforcement: Giving a reward for good behavior (getting a sweet for tidying your room). Behavior increases.
- Negative Reinforcement: Taking away something bad when you do something good (the annoying "seatbelt beeper" stops when you buckle up). Behavior increases.
- Punishment: A negative consequence for bad behavior. Behavior decreases.

Common Mistake to Avoid: Many students think negative reinforcement is punishment. It’s NOT! Reinforcement (both positive and negative) always makes a behavior more likely to happen. Punishment makes it less likely.

3. Social Learning Theory (Learning by Observation)

Bandura suggested we learn by watching others (models).
- Observation: You see someone do something.
- Imitation: You copy the behavior.
- Vicarious Reinforcement: You see the model get rewarded for their behavior, so you are more likely to copy them.

Memory Aid: ARRM (The 4 stages of SLT)
1. Attention: You have to notice the behavior.
2. Retention: You have to remember it.
3. Reproduction: You have to be physically able to do it.
4. Motivation: You have to want to do it (usually for a reward).

Quick Review:
- Classical: Pairing/Association (Pavlov).
- Operant: Rewards/Punishment (Skinner).
- Social Learning: Watching/Copying (Bandura).

Key Takeaway: Our environment shapes us. Whether through associations, rewards, or role models, our behavior is a learned response to the world around us.

Final Encouragement

You've made it through the core content of AS Psychology! Don't worry if you need to read through these sections a few times. Psychology is like a puzzle—once you see how the pieces (Social, Cognitive, Biological, and Learning) fit together, it all starts to make sense. Keep going, you're doing great!