📚 Year 8 Edexcel Psychology: Key Concepts Overview | 8年级爱德思心理学：核心知识点梳理
Psychology is the scientific study of the mind and behaviour, covering everything from how we remember a phone number to why we follow a crowd. This guide pulls together the core concepts you will encounter in Year 8 Edexcel Psychology, giving you a clear overview of each topic with paired English and Chinese explanations. Use it to strengthen your understanding and prepare for assessments.
心理学是关于心智与行为的科学研究，涵盖从我们如何记住一串电话号码到为什么会随大流的所有内容。本文梳理了你在8年级爱德思心理学中会遇到的核心概念，通过中英对照的讲解为你提供清晰的总体框架。用它来巩固理解，为评估做好准备。
1. What is Psychology? | 什么是心理学？
Psychology comes from the Greek words ‘psyche’ (mind) and ‘logos’ (study). It is the systematic investigation of how people think, feel and act.
心理学来源于希腊语 ‘psyche’（心智）和 ‘logos’（研究）。它是对人类思考、感受和行动方式的系统探究。
Psychologists study both observable behaviour, such as speaking or walking, and internal mental processes, like memory, attention and emotion. They use empirical evidence rather than everyday beliefs.
心理学家既研究可观察的行为，例如说话或走路，也研究内部心理过程，如记忆、注意和情绪。他们依据实验证据，而非日常猜测。
The discipline is often divided into areas: cognitive (thinking), social (groups), developmental (lifespan changes), biological (brain and body) and individual differences (personality). In Year 8 you will touch on all these.
心理学通常分为若干领域：认知（思维）、社会（群体）、发展（毕生变化）、生物（大脑与身体）以及个体差异（人格）。8年级的内容会涉及所有这些方面。
2. The Scientific Method in Psychology | 心理学中的科学方法
Psychologists follow the scientific method: they observe, create a hypothesis, test it, analyse the data and draw conclusions. A hypothesis is a precise, testable prediction about the outcome of a study.
心理学家遵循科学方法：观察现象、提出假设、检验假设、分析数据并得出结论。假设是一项精确、可检验的预测，针对研究的结果。
Key variables must be operalisation defined. The independent variable (IV) is what the researcher changes; the dependent variable (DV) is what is measured. For example, if we test whether noise affects memory, noise is the IV and recall score is the DV.
关键变量必须进行操作化定义。自变量（IV）是研究者改变的因素；因变量（DV）是测量得到的因素。例如，测试噪音是否影响记忆，噪音就是自变量，回忆得分就是因变量。
Extraneous variables, such as room temperature or participant mood, must be controlled or kept constant so they do not affect the DV. A well‑controlled study allows cause‑and‑effect conclusions.
额外变量，如室温或参与者情绪，必须加以控制或保持不变，以免影响因变量。控制良好的研究才能得出因果关系的结论。
3. Research Methods: Experiments and Observations | 研究方法：实验与观察
A laboratory experiment is conducted in a controlled setting. It has high internal validity because the researcher can isolate the IV. However, it may lack ecological validity as the situation is artificial.
实验室实验在受控环境中进行，具有较高的内在效度，因为研究者可以隔离自变量。但它可能缺乏生态效度，因为实验情境是人为设计的。
A field experiment takes place in a natural environment, such as a school playground. Participants often do not know they are being watched, which can lead to more realistic behaviour but makes it harder to control extraneous variables.
现场实验在自然环境中进行，如学校操场。参与者通常不知道自己正在被观察，这有利于获得更真实的行为，但更难控制额外变量。
Observational studies simply record behaviour without manipulation. A naturalistic observation captures spontaneous actions, while a controlled observation might take place in a lab setting. Both are useful where experiments would be impractical or unethical.
观察研究只记录行为而不施加操纵。自然观察捕捉自发行为，而控制观察可能在实验室环境中进行。当实验无法实施或不合伦理时，两种观察都很实用。
| Method 方法 | Strength 优点 | Limitation 局限 |
|---|---|---|
| Lab experiment 实验室实验 | High control 控制严格 | Artificial setting 情境人为 |
| Field experiment 现场实验 | Realistic behaviour 行为真实 | Less control over variables 变量控制较差 |
| Observation 观察 | Natural data 自然数据 | Observer bias possible 可能有观察者偏差 |
4. Memory: The Multi‑Store Model | 记忆：多储存模型
Atkinson and Shiffrin (1968) proposed the multi‑store model, which describes memory as three separate stores: sensory register, short‑term memory (STM) and long‑term memory (LTM).
Atkinson与Shiffrin（1968）提出了多储存模型，将记忆描述为三个独立的储存库：感觉登记、短时记忆和长时记忆。
Information enters the sensory register through our senses. It lasts only a fraction of a second unless we pay attention to it. Once attended, it transfers to STM.
信息通过感官进入感觉登记，只维持不到一秒，除非我们对其注意。一旦注意，信息就会转入短时记忆。
STM has a limited capacity of about 7±2 items and holds information for around 18–30 seconds. Rehearsal — repeating the information — can maintain it in STM and eventually transfer it to LTM.
短时记忆容量有限，大约7±2个项目，保持信息约18–30秒。复述——即重复信息——可以将其保持在短时记忆中，并最终转入长时记忆。
LTM is potentially unlimited in capacity and duration. Memories are stored in semantic (meaning), episodic (events) and procedural (skills) forms. Retrieval is the process of getting information back into STM when needed.
长时记忆的容量和持续时间潜在地无限。记忆以语义（意义）、情景（事件）和程序（技能）三种形式储存。提取是在需要时将信息召回到短时记忆的过程。
5. Social Influence: Conformity and Obedience | 社会影响：从众与服从
Conformity is a change in behaviour or belief to fit in with a group. Solomon Asch (1951) found that people would give an obviously wrong answer about line lengths if confederates gave the same wrong answer first.
从众是指为了融入群体而改变行为或信念。Solomon Asch（1951）发现，如果同谋先给出相同的错误答案，人们也会在明显错误的线段判断上给出错误答案。
Two types of conformity: normative social influence — wanting to be liked and accepted — and informational social influence — believing the group knows better. Asch’s study mainly showed normative influence.
两种从众类型：规范性社会影响——希望被喜欢和接纳；信息性社会影响——认为群体更在行。Asch 的研究主要体现了规范性影响。
Obedience involves following a direct order from an authority figure. Stanley Milgram (1963) showed that ordinary people could be led to deliver what they thought were painful electric shocks to a learner, simply because an authority figure instructed them.
服从涉及遵从权威人物的直接指令。Stanley Milgram（1963）表明，普通人仅仅因为权威人物要求，就会对学习者施加他们认为痛苦的电击。
Both conformity and obedience can lead to positive and negative outcomes. Understanding them helps explain historical events as well as everyday peer pressure.
从众和服从都能导致积极和消极的结果。理解它们有助于解释历史事件以及日常的同伴压力。
6. Attachment Theory: Bowlby and Ainsworth | 依恋理论：鲍尔比与安斯沃斯
John Bowlby argued that infants have an innate need to form a strong emotional bond with a caregiver. This attachment provides a secure base from which to explore the world and is crucial for later emotional development.
John Bowlby 主张，婴儿天生需要与照顾者建立强烈的情感纽带。这种依恋提供安全基地，儿童可以由此探索世界，并对日后的情感发展至关重要。
Bowlby’s “maternal deprivation hypothesis” stated that prolonged separation from the primary caregiver during the critical period (first two years) could lead to long‑term emotional and social difficulties.
Bowlby 的 “母性剥夺假说” 指出，在关键期（最初两年）与主要照顾者长期分离，可能导致长期的情感与社交困难。
Mary Ainsworth used the Strange Situation procedure to identify three attachment styles: secure (explores, upset when caregiver leaves, happy at reunion), insecure‑avoidant (ignores caregiver, avoids contact) and insecure‑resistant (clings, angry at reunion).
Mary Ainsworth 运用陌生情境法识别出三种依恋类型：安全型（探索环境，照顾者离开时不安，团聚时高兴）、不安全-回避型（忽视照顾者，回避接触）和不安全-矛盾型（紧紧依附，团聚时表现出愤怒）。
Cultural variations exist; the distribution of attachment types differs across countries, reminding us that caregiving practices are not universal.
存在文化差异；依恋类型的分布在不同国家有所不同，这提醒我们育儿方式并非全球统一。
7. Cognitive Development: Piaget’s Stages | 认知发展：皮亚杰的阶段
Jean Piaget believed that children actively construct their understanding of the world through schemas — mental frameworks that grow and adapt. His theory divides cognitive development into four stages.
Jean Piaget 认为，儿童通过图式——不断成长和适应的心理框架——主动建构对世界的理解。他的理论将认知发展划分为四个阶段。
The sensorimotor stage (0–2 years): infants learn through senses and actions. They develop object permanence — understanding that objects continue to exist even when out of sight.
感知运动阶段（0–2岁）：婴儿通过感官和动作学习，发展出客体永久性——懂得事物即使看不见也仍然存在。
The preoperational stage (2–7 years): children use symbols and language but are egocentric — they struggle to see others’ viewpoints. They also lack conservation, not realising that quantity remains the same when appearance changes.
前运算阶段（2–7岁）：儿童使用符号和语言，但以自我为中心——难以从他人角度看问题。同时缺乏守恒概念，不明白外观改变后数量仍保持不变。
The concrete operational stage (7–11 years): logical reasoning about physical objects emerges. Children master conservation and can classify objects, but they think best about real, tangible situations.
具体运算阶段（7–11岁）：对具体物体的逻辑推理出现，儿童掌握了守恒并能分类，但最好围绕真实的、可触摸的情境进行思考。
The formal operational stage (11+ years): adolescents can think abstractly, reason hypothetically and plan for the future. Not everyone fully reaches this stage.
形式运算阶段（11岁以后）：青少年能够进行抽象思维、假设推理和规划未来。并非所有人都完全达到这个阶段。
8. Learning Theory: Classical Conditioning | 学习理论：经典条件作用
Ivan Pavlov discovered classical conditioning while studying dogs’ salivation. He noticed dogs began to salivate when they saw the lab assistant who normally fed them, even without food.
Ivan Pavlov 在研究狗的唾液分泌时发现了经典条件作用。他注意到狗即使没看到食物，也会在看到通常喂它们的实验助手时分泌唾液。
The unconditioned stimulus (UCS) is food, which naturally triggers the unconditioned response (UCR) of salivation. A neutral stimulus, such as a bell, becomes the conditioned stimulus (CS) when paired repeatedly with the UCS. The salivation triggered by the bell alone is the conditioned response (CR).
无条件刺激（UCS）是食物，自然引起无条件反应（UCR）——唾液分泌。一个中性刺激，如铃声，在与无条件刺激反复配对后，成为条件刺激（CS）。单独由铃声引起的唾液分泌就是条件反应（CR）。
Classical conditioning explains many emotional responses, such as phobias. If a neutral object is paired with a frightening event, the object itself can later provoke fear.
经典条件作用能解释许多情绪反应，如恐惧症。如果一个中性物体与可怕事件配对，这个物体本身之后就会引发恐惧。
9. Learning Theory: Operant Conditioning | 学习理论：操作性条件作用
B.F. Skinner demonstrated that behaviour is shaped by consequences. He used a Skinner box to show that rats and pigeons could learn to press levers or peck discs for rewards.
B.F. Skinner 证明行为是由后果塑造的。他用斯金纳箱展示大鼠和鸽子可以学会按杠杆或啄按钮以获取奖励。
Positive reinforcement means giving something pleasant (e.g., praise) to increase a behaviour. Negative reinforcement means removing something unpleasant (e.g., stopping a nagging noise) to increase a behaviour. Both strengthen the behaviour they follow.
正强化指给予愉快的事物（如称赞）以增加行为；负强化指移除不愉快的事物（如停止烦人的噪音）以增加行为。两者都增强其后的行为。
Punishment is designed to decrease a behaviour. Positive punishment adds an unpleasant consequence (e.g., extra chores), while negative punishment removes something desirable (e.g., taking away a phone).
惩罚旨在减少行为。正惩罚增加不愉快后果（如额外家务），负惩罚则移除心爱之物（如收走手机）。
Skinner emphasised that reinforcement is more effective long‑term than punishment. Partial reinforcement schedules (e.g., giving a reward only some of the time) make learned behaviours more resistant to extinction.
Skinner 强调，从长期看强化比惩罚更有效。部分强化安排（如只偶尔给予奖励）使习得的行为更难消退。
10. Ethics in Psychological Research | 心理学研究中的伦理
Psychologists follow strict ethical guidelines to protect participants. In the UK, the British Psychological Society (BPS) sets out rules that all researchers must respect.
心理学家遵循严格的伦理准则保护参与者。在英国，英国心理学会（BPS）制定了所有研究者都必须遵守的规范。
Informed consent: participants should know the purpose of the study, what they will do and agree to take part without pressure. For children under 16, parental consent is required.
知情同意：参与者应当了解研究目的、自己需要做什么，并在没有压力的情况下同意参与。对于16岁以下儿童，还需获得家长同意。
Deception should be avoided unless absolutely necessary. If a study involves mild deception, participants must be fully debriefed afterwards and given the right to withdraw their data.
除非绝对必要，应避免欺骗。如果研究涉及轻度欺骗，事后必须对参与者进行充分的事后说明，并允许他们撤回数据。
Protection from harm: participants must leave a study in the same physical and psychological state in which they arrived. Risk of distress, embarrassment or injury must be minimal.
保护免受伤害：参与者离开研究时的身心状态必须与参与前相同。抑郁、尴尬或受伤的风险必须降到最低。
Confidentiality: personal data must be kept anonymous. No individual should be identifiable from published results. Researchers also respect the participants’ right to withdraw at any time.
保密原则：个人数据必须匿名保存。已发表的结果中不应能识别出任何个人。研究者还要尊重参与者随时退出的权利。
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