A-Level Edexcel Psychology: Key Concepts Overview | A-Level Edexcel 心理学：核心知识点梳理

📚 A-Level Edexcel Psychology: Key Concepts Overview | A-Level Edexcel 心理学：核心知识点梳理

Welcome to a streamlined revision guide for A-Level Edexcel Psychology. This article summarises the essential knowledge across the syllabus, providing clear definitions, key theories, and core studies to help you consolidate your understanding. Each section is paired in English and Chinese for bilingual learners.

欢迎阅读A-Level Edexcel心理学的精简复习指南。本文梳理了教学大纲中的核心知识点，提供了清晰的定义、关键理论和经典研究，帮助巩固理解。每个部分均以中英双语配对呈现，方便双语学习者。

1. Research Methods | 研究方法

Psychology is built on empirical research, and Edexcel requires strong knowledge of methodology. Key features include the experimental method, where an independent variable (IV) is manipulated to observe its effect on a dependent variable (DV), while extraneous variables are controlled.

心理学建立在实证研究之上，Edexcel考试要求掌握扎实的方法论知识。其关键特征包括实验法，即操纵自变量（IV）以观察其对因变量（DV）的影响，同时控制额外变量。

Participants are often allocated to conditions through random assignment to avoid bias. Repeated measures, independent groups, and matched pairs are common experimental designs.

被试通常通过随机分配被安排到不同实验条件中，以避免偏差。重复测量、独立组和配对组是常见的实验设计。

Non-experimental methods include observation (covert/overt, participant/non-participant), self-report techniques (questionnaires, interviews), and correlations. A correlation coefficient (r) indicates the strength and direction of a relationship but does not imply causation.

非实验方法包括观察（隐蔽/公开，参与/非参与）、自陈技术（问卷、访谈）和相关法。相关系数（r）表示关系的强度和方向，但并不意味着因果关系。

Ethical guidelines are paramount. The British Psychological Society (BPS) outlines principles: informed consent, deception avoidance, debriefing, right to withdraw, confidentiality, and protection from harm.

伦理准则至关重要。英国心理学会（BPS）制定了原则：知情同意、避免欺骗、事后说明、退出权利、保密和保护免受伤害。

Design	Strengths	Limitations
Repeated measures	No participant variables	Order effects (e.g., practice/fatigue)
Independent groups	No order effects	Participant variables may differ
Matched pairs	Controls participant variables	Time-consuming and difficult to match perfectly

Table: Comparison of experimental designs.

表格：实验设计对比。

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2. Social Psychology: Obedience | 社会心理学：服从

Obedience involves following direct commands from an authority figure. Stanley Milgram’s 1963 baseline study demonstrated that 65% of participants administered the maximum 450-volt shock to a learner under authority pressure, revealing the power of situation over individual conscience.

服从是指听从权威人物的直接命令。Stanley Milgram在1963年的基线研究中证明，65%的参与者在权威压力下对学习者施加了最高450伏的电击，揭示了情境对个人良知的压倒性力量。

Milgram’s agency theory proposes that individuals shift between an autonomous state (acting according to their own values) and an agentic state (serving as an agent for an authority). Moral strain arises when people feel compelled to obey but still recognise the immoral nature of their actions.

Milgram的代理理论提出，个体在自主状态（依自身价值观行动）和代理状态（充当权威的代理人）之间转换。当人们被迫服从但又认识到行为的不道德时，会产生道德紧张。

Bibb Latané’s social impact theory suggests that obedience is determined by the strength (status, authority), immediacy (closeness), and number of sources exerting influence. A single high-status, physically present authority figure increases obedience significantly.

Bibb Latané的社会影响理论认为，服从由影响力来源的强度（地位、权威）、直接性（接近程度）和数量决定。一个高地位、物理上在场的权威人物会显著提高服从性。

Edexcel expects knowledge of variations: uniform, proximity, location, and the role of legitimate authority. For example, obedience dropped to 40% in the run-down office variation.

Edexcel考试要求掌握变化因素：制服、接近度、地点和合法权威的作用。例如，在破旧办公室的变体中，服从率降至40%。

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3. Social Psychology: Prejudice | 社会心理学：偏见

Prejudice is a negative attitude based on group membership. Realistic conflict theory (Sherif’s Robbers Cave experiment) argues that competition for scarce resources creates intergroup hostility and prejudice. Superordinate goals, which require cooperation, reduce conflict.

偏见是基于群体身份产生的消极态度。现实冲突理论（Sherif的罗伯斯山洞实验）认为，对稀缺资源的竞争会导致群体间敌意和偏见。需要合作才能实现的超级目标可以减少冲突。

Social identity theory (Tajfel & Turner) explains prejudice through the process of categorisation, identification, and social comparison. Individuals derive self-esteem from their in-group, leading to in-group favouritism and out-group derogation, even in minimal group paradigms.

社会认同理论（Tajfel和Turner）通过分类、认同和社会比较的过程解释偏见。个体从内群体中获得自尊，从而导致内群体偏爱和外群体贬抑，即使在最简群体范式中也是如此。

Prejudice can be measured using self-report scales like the Modern Racism Scale. Interventions, such as equal status contact, help reduce prejudice under the right conditions (Allport’s contact hypothesis).

偏见可以通过自陈量表如现代种族主义量表来测量。在适当条件下，平等地位的接触等干预措施有助于减少偏见（Allport的接触假说）。

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4. Cognitive Psychology: Memory | 认知心理学：记忆

The multi-store model (Atkinson & Shiffrin) describes memory as consisting of sensory memory, short-term memory (STM), and long-term memory (LTM). Information flows through these stores via attention and rehearsal. STM has a limited capacity of 7±2 items and duration of around 18–30 seconds.

多贮存模型（Atkinson和Shiffrin）将记忆描述为由感觉记忆、短时记忆（STM）和长时记忆（LTM）组成。信息通过注意和复述在这些存储中流动。STM的容量有限，为7±2个项目，持续时间为18-30秒左右。

The working memory model (Baddeley & Hitch) replaces the unitary STM with a system comprising the central executive, phonological loop (articulatory control process and phonological store), visuospatial sketchpad, and episodic buffer. This model emphasises active processing and dual-task performance.

工作记忆模型（Baddeley和Hitch）用包括中央执行器、语音回路（发音控制过程和语音存储）、视空间画板和情景缓冲器的系统取代了单一STM。该模型强调主动加工和双任务表现。

Long-term memory is differentiated into episodic (personal events), semantic (facts, knowledge), and procedural (skills). Research on hippocampal damage (e.g., HM case study) supports these distinctions.

长时记忆被区分为情景记忆（个人事件）、语义记忆（事实、知识）和程序性记忆（技能）。对海马体损伤的研究（如HM个案）支持了这些区分。

Context-dependent and state-dependent forgetting occur when retrieval cues are absent. Interference theory (proactive and retroactive interference) explains forgetting as a result of competing memories.

当缺乏提取线索时，会发生情境依赖和状态依赖的遗忘。干扰理论（前摄干扰和倒摄干扰）认为，遗忘是竞争性记忆的结果。

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5. Biological Psychology: Brain and Behavior | 生物心理学：大脑与行为

Localisation of function refers to the idea that specific brain regions are responsible for particular behaviours. Broca’s area (left frontal lobe) is involved in speech production, while Wernicke’s area (left temporal lobe) is critical for language comprehension. Evidence from aphasia patients supports this.

功能定位指特定脑区负责特定行为。布洛卡区（左额叶）与言语产生有关，而韦尼克区（左颞叶）对语言理解至关重要。来自失语症患者的证据支持了这一点。

Neurotransmitters are chemical messengers that transmit signals across synapses. For example, serotonin regulates mood, and low levels are linked to depression; dopamine is associated with reward and movement, implicated in schizophrenia and Parkinson’s disease.

神经递质是通过突触传递信号的化学信使。例如，血清素调节情绪，低水平与抑郁症有关；多巴胺与奖赏和运动相关，涉及精神分裂症和帕金森病。

The fight-or-flight response involves the sympathetic-adrenal-medullary (SAM) pathway. The sympathetic nervous system triggers the release of adrenaline and noradrenaline, producing increased heart rate, dilated pupils, and heightened alertness, preparing the body for action.

战斗或逃跑反应涉及交感-肾上腺-髓质（SAM）通路。交感神经系统触发肾上腺素和去甲肾上腺素的释放，导致心率加快、瞳孔放大和警觉性增强，为身体行动做好准备。

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6. Learning Theories: Classical Conditioning | 学习理论：经典条件作用

Ivan Pavlov demonstrated that a neutral stimulus (e.g., a bell) could elicit salivation after being repeatedly paired with an unconditioned stimulus (UCS, food) that naturally produces an unconditioned response (UCR, salivation). The neutral stimulus becomes a conditioned stimulus (CS), and salivation becomes a conditioned response (CR).

伊万·巴甫洛夫证明，一个中性刺激（如铃声）在与天然引起非条件反应（UCR，

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