📚 GCSE CAIE Psychology: Key Concepts Organiser | GCSE CAIE 心理学：核心知识点梳理
This article provides a structured summary of the core topics covered in the CAIE GCSE Psychology syllabus, helping students revise essential theories, studies, and research methods. Each section is presented in both English and Chinese to support bilingual learners preparing for their examinations.
本文系统梳理了 CAIE GCSE 心理学大纲涵盖的核心主题，帮助考生复习关键理论、经典研究和研究方法。每部分均以英中双语对照呈现，方便双语学习者理解和记忆，高效备战考试。
1. Research Methods: Experiments and Variables | 研究方法：实验与变量
Experimental research is the most powerful method for establishing cause-and-effect relationships. The researcher manipulates an independent variable (IV) and measures the resulting change in a dependent variable (DV), while keeping all other conditions constant to control extraneous variables.
实验法是确立因果关系最有力的研究方法。研究者操纵自变量 (IV)，测量因变量 (DV) 随之发生的变化，并保持其他条件恒定以控制额外变量。
Standardised procedures ensure that every participant experiences the same conditions except for the IV. This increases internal validity, meaning we can be more confident that the IV caused any observed change in the DV.
标准化程序确保每位参与者除自变量外经历相同的实验条件。这提高了内部效度，即我们更有把握认定是自变量导致了因变量的变化。
Three common experimental designs are repeated measures (same participants in all conditions), independent groups (different participants in each condition), and matched pairs (participants are matched on key characteristics and then split). Each design has its own strengths and weaknesses in terms of order effects, participant variables, and practical demands.
三种常见的实验设计为：重复测量（同一批参与者接受所有条件）、独立组（不同参与者分别接受不同条件）和配对组（根据关键特征匹配后分开）。每种设计在顺序效应、参与者变量和实际操作性上各有优缺点。
All psychology studies must adhere to ethical guidelines. Key principles include obtaining informed consent, protecting participants from harm, allowing the right to withdraw at any time, maintaining confidentiality, and providing a full debriefing after the study.
所有心理学研究都必须遵守伦理准则。关键原则包括：获得知情同意、保护参与者免受伤害、允许其随时退出、维护隐私保密，并在研究结束后提供完整的事后解释。
2. Memory: Multi-Store Model and Forgetting | 记忆：多存储模型与遗忘
The multi-store model of memory (Atkinson and Shiffrin, 1968) describes memory as a flow of information through three separate stores: sensory memory, short-term memory (STM), and long-term memory (LTM). Each store differs in coding, capacity, and duration.
多存储记忆模型（Atkinson 和 Shiffrin, 1968）将记忆描述为信息流经三个独立存储系统的过程：感觉记忆、短时记忆 (STM) 和长时记忆 (LTM)。各个存储系统在编码方式、容量和持续时间上均不相同。
TM. STM encodes mainly acoustically, has a limited capacity of 7±2 items, and can hold information for about 18-30 seconds without rehearsal.
信息首先进入感觉记忆，在此以感觉通道特有的形式短暂保存。只有被注意到的信息才会进入短时记忆。短时记忆主要进行听觉编码，容量有限，为 7±2 个组块，不经复述约能保持 18-30 秒。
Through elaborative rehearsal, memories are transferred from STM into LTM, which encodes semantically and has potentially unlimited capacity and duration. The model explains primacy and recency effects in serial position curves.
通过精细复述，记忆从短时记忆转入长时记忆。长时记忆主要采用语义编码，容量和持续时间在理论上无限。该模型能解释系列位置曲线中的首因效应和近因效应。
| Store | Coding | Capacity | Duration |
|---|---|---|---|
| Sensory Memory (感觉记忆) | Modality-specific (sense-specific) | Very large | Less than 1 second (视觉图像约0.5秒) |
| Short-Term Memory (短时记忆) | Mainly acoustic (听觉) | 7 ± 2 items | 18-30 seconds (不经复述) |
| Long-Term Memory (长时记忆) | Mainly semantic (语义) | Potentially unlimited | Up to a lifetime |
Forgetting from STM tends to occur due to displacement or decay, whereas forgetting from LTM is often explained by interference (proactive or retroactive) or retrieval failure, such as context-dependent forgetting.
短时记忆中的遗忘通常源于信息被替换（位移）或痕迹消退；而长时记忆的遗忘则常由前摄或倒摄干扰、或提取失败（如情境依赖遗忘）来解释。
3. Perception: Visual Illusions and Constancies | 感知：视觉错觉与恒常性
Perception is the process of interpreting sensory information to make sense of the world. Visual illusions demonstrate that perception is not simply a direct copy of reality but involves active construction influenced by past experience, expectations, and cues.
感知是解释感觉信息、赋予意义的过程。视觉错觉表明，感知并非现实的直接复制，而是涉及主动建构，受到过去经验、预期和线索的影响。
The Müller-Lyer illusion shows two lines of equal length that appear different because of the direction of the arrowheads. One explanation suggests that the line with outgoing fins is perceived as an inside corner (further away), whereas the line with ingoing fins is perceived as an outside corner (closer). This is linked to misapplied size constancy.
缪勒-莱尔错觉显示两条等长线段因箭头方向不同而显得长短不一。一种解释认为，箭头向外的线段被感知为内墙角（距离更远），而箭头向内的线条被感知为外墙角（距离更近），这与大小恒常性的误用有关。
Perceptual constancies allow us to perceive objects as stable despite changes in the sensory input. Size constancy means we perceive an object as the same size even when its retinal image shrinks with distance. Colour constancy and shape constancy operate similarly.
感知恒常性使我们在感觉输入变化时仍能稳定地感知物体。大小恒常性指即使物体在视网膜上的成像随距离缩小，我们仍感知其大小不变。颜色恒常性和形状恒常性也类似运作。
Gregory's constructivist theory argues that perception is largely shaped by top-down processing based on prior knowledge and expectations, whereas Gibson's direct theory emphasises bottom-up processing from the ambient optic array, where cues like motion parallax provide sufficient information.
Gregory 的建构理论认为感知在很大程度上由基于先前知识和期望的自上而下加工塑造，而 Gibson 的直接理论强调来自环境光阵列的自下而上加工，诸如运动视差等线索已能提供足够信息。
4. Biopsychology: Neurons and Synaptic Transmission | 生物心理学：神经元与突触传递
Neurons are specialised cells that transmit electrical and chemical signals throughout the nervous system. The three main types are sensory neurons, relay (interneurons), and motor neurons. Each neuron has a cell body, dendrites, and an axon covered by a myelin sheath that speeds up transmission.
神经元是专门传递电信号和化学信号的细胞，遍布整个神经系统。三种主要类型为感觉神经元、联络神经元（中间神经元）和运动神经元。每个神经元具有细胞体、树突和由髓鞘包裹的轴突，髓鞘能加速传递。
When a neuron is at rest, the inside is negatively charged compared to the outside (-70 mV resting potential). When stimulated, sodium ions rush in, causing depolarisation (action potential). This electrical impulse travels along the axon to the terminal buttons.
神经元静息时，膜内较膜外带负电（静息电位约 -70 mV）。受到刺激时，钠离子涌入导致去极化（动作电位）。这个电冲动沿轴突传导至终扣。
At the synapse, the electrical signal triggers the release of neurotransmitters from vesicles. These chemical messengers diffuse across the synaptic gap and bind to receptor sites on the postsynaptic neuron, causing either excitation (more likely to fire) or inhibition (less likely).
在突触处，电信号触发囊泡释放神经递质。这些化学信使扩散越过突触间隙，与突触后神经元上的受体位点结合，引发兴奋（更易发放冲动）或抑制（更难发放冲动）。
Reuptake or enzymatic breakdown terminates the signal. Key neurotransmitters include serotonin (mood, sleep), dopamine (reward, movement), and acetylcholine (muscle action, memory).
再摄取或酶降解会终止信号。关键的神经递质包括血清素（情绪、睡眠）、多巴胺（奖赏、运动）和乙酰胆碱（肌肉动作、记忆）。
5. Brain Structure and Function | 大脑结构与功能
The brain is divided into two hemispheres connected by the corpus callosum. Each hemisphere controls the opposite side of the body. The cerebral cortex is the outer layer responsible for higher-order functions and is divided into four lobes: frontal, parietal, occipital, and temporal.
大脑分为由胼胝体连接的两个半球，每个半球控制对侧身体。大脑皮层是负责高级功能的外层，分为四个叶：额叶、顶叶、枕叶和颞叶。
Localisation of function means that specific areas of the brain are associated with particular functions. Broca's area, in the left frontal lobe, is crucial for speech production. Damage results in Broca's aphasia, where individuals struggle to produce fluent speech but comprehension remains relatively intact.
功能定位指大脑特定区域与特定功能相关联。布洛卡区位于左侧额叶，对言语产生至关重要。该区受损导致布洛卡失语症，患者言语不流利，但理解能力相对完好。
Wernicke's area, in the left temporal lobe, is involved in language comprehension. Damage leads to Wernicke's aphasia, characterised by fluent but meaningless speech and poor understanding. These case studies, such as Phineas Gage, support the idea of localised brain functions.
韦尼克区位于左侧颞叶，参与语言理解。该区受损导致韦尼克失语症，表现为言语流利但无意义，理解力差。Phineas Gage 等案例研究为大脑功能定位提供了支持证据。
Modern brain scanning techniques, such as fMRI and PET scans, allow researchers to observe brain activity in real time, revealing areas involved in memory, emotion, and decision-making.
现代脑部扫描技术（如功能性磁共振成像 fMRI 和正电子发射断层扫描 PET）让研究者能实时观察大脑活动，揭示涉及记忆、情绪和决策的脑区。
6. Attachment: Bowlby's Maternal Deprivation Hypothesis | 依恋：鲍尔比的母性剥夺假设
Bowlby argued that infants form an emotional bond with a primary caregiver, typically the mother, within a critical period of 2-3 years. This attachment relationship serves as an internal working model for all future relationships and is essential for healthy social and emotional development.
鲍尔比认为，婴幼儿在 2-3 岁的关键期内与主要照料者（通常是母亲）形成情感纽带。这种依恋关系成为未来所有人际关系的内部工作模型，对健康的社会情感发展至关重要。
His maternal deprivation hypothesis states that prolonged separation from the primary caregiver during the critical period can have severe long-term consequences, including affectionless psychopathy – an inability to experience guilt or form deep relationships.
他的母性剥夺假设指出，在关键期内长期与主要照料者分离会导致严重后果，包括无情型精神病态——无法体验内疚或建立深层关系。
Bowlby's 44 juvenile thieves study supported this hypothesis. He found that a significant proportion of the thieves classified as affectionless psychopaths had experienced early separation compared to none in the control group, though the study relied on retrospective data.
鲍尔比的 44 名少年小偷研究支持了该假设。他发现被归类为无情型精神病态的小偷中有相当比例经历过早期分离，而对照组则无，但该研究依赖回溯性数据。
The internal working model suggests that early attachment experiences shape expectations about the self, others, and relationships. Secure attachment leads to positive models, while insecure or disrupted attachment can lead to psychological difficulties.
内部工作模型表明，早期依恋经历塑造了关于自我、他人及人际关系的期望。安全型依恋形成积极模型，而不安全或中断的依恋可能导致心理困难。
7. Cognitive Development: Piaget's Stage Theory | 认知发展：皮亚杰的阶段理论
Piaget proposed that cognitive development occurs in four universal, invariant stages as children actively construct their understanding of the world. Each stage is characterised by qualitatively different ways of thinking.
皮亚杰提出认知发展经历四个普遍且顺序不变的阶段，儿童在主动建构对世界的理解中推进。每个阶段思维特质在质量上各不相同。
| Stage (阶段) | Approximate Age (年龄) | Key Features (关键特征) |
|---|---|---|
| Sensorimotor (感知运动阶段) | 0-2 years | Object permanence (客体永久性); learning through senses and actions. |
| Pre-operational (前运算阶段) | 2-7 years | Egocentrism (自我中心); animism; lack of conservation (缺乏守恒). |
| Concrete Operational (具体运算阶段) | 7-11 years | Conservation (守恒); decentration; logical reasoning about concrete events. |
| Formal Operational (形式运算阶段) | 11+ years | Abstract reasoning (抽象推理); hypothetical thinking; systematic problem-solving. |
A core concept in the pre-operational stage is egocentrism: children assume that everyone sees the world exactly as they do. Piaget demonstrated this with the three mountains task, where children could not describe the view from a doll's perspective.
前运算阶段的核心概念是自我中心：儿童认为他人所看到的世界与自己完全一样。皮亚杰用“三山任务”展示了这一点——儿童无法从洋娃娃的视角描述景象。
Conservation is the understanding that quantity remains the same despite changes in appearance. Before the concrete operational stage, children fail to conserve number, volume, or mass because they are dominated by the perceptual appearance of the situation.
守恒是指尽管外观改变但数量保持不变的理解能力。在具体运算阶段之前，儿童无法完成数量、体积或质量的守恒任务，因为他们被知觉表象所主导。
8. Social Influence: Asch's Conformity Study | 社会影响：阿希的从众研究
Asch (1951) investigated conformity to group pressure using a perceptual judgment task. Participants were placed in groups with confederates who unanimously gave obviously wrong answers. About 75% of genuine participants conformed at least once, and the overall conformity rate was approximately 37%.
阿希 (1951) 通过知觉判断任务探究群体压力下的从众行为。参与者被安排与一群统一给出明显错误答案的假被试同组。约 75% 的真实参与者至少从众过一次，整体从众率约为 37%。
The study identified key factors affecting conformity: group size (conformity increased with group size up to about 3-4 confederates), unanimity (if one confederate broke the consensus, conformity dropped sharply), and task difficulty (harder tasks produced more conformity).
该研究识别了影响从众的关键因素：群体规模（从众随人数增加，约 3-4 名假被试时达最高）、一致性（若有一名假被试打破一致性，从众率骤降）和任务难度（任务越难，从众越多）。
Normative social influence explains conformity as the desire to be liked and accepted by the group; participants conformed to avoid standing out. Informational social influence occurs when individuals look to the group for guidance in ambiguous situations, believing the group is more likely to be correct.
规范社会影响将从众解释为渴望被群体喜欢和接纳，参与者为不显得突兀而随大流。信息社会影响则发生在模糊情境中个体将群体视为正确信息的来源而导致的从众。
Asch's findings reveal the power of social pressure. However, the study is criticised for low ecological validity (judging lines is trivial) and cultural bias, as later replications showed different conformity levels in collectivist versus individualist cultures.
阿希的研究揭露了社会压力的强大。但该研究因生态效度低（判断线段无足轻重）和文化偏差受到批评，后续重复实验显示集体主义文化比个人主义文化从众水平更高。
9. Obedience: Milgram's Experiment | 服从：米尔格拉姆实验
Milgram (1963) designed a dramatic experiment to assess how far people would obey an authority figure instructing them to harm another person. Participants, believing they were administering real electric shocks to a learner, were ordered to increase the voltage with each error.
米尔格拉姆 (1963) 设计了一个戏剧性实验，测试人们在权威人物指令下会多大程度地伤害他人。参与者以为自己在给“学习者”施以真实电击，并按指令在每次错误时提高电压。
Surprisingly, 65% of participants went up to the maximum 450-volt level, even though the learner screamed, complained of heart trouble, and fell silent. Milgram concluded that ordinary people can commit destructive acts when under the influence of a legitimate authority figure.
令人惊讶的是，65% 的参与者一直施加到最高的 450 伏电压，即使“学习者”尖叫、主诉心脏不适并最终沉默。米尔格拉姆总结，普通人在合法权威的影响下可能做出破坏性行为。
Situational factors that influence obedience include proximity of the victim (less obedience when the victim was in the same room), proximity of the authority (obedience decreased when orders were given by phone), and the presence of a disobedient role model.
影响服从的情境因素包括：受害者接近性（受害者在同一房间时服从降低）、权威接近性（电话下达指令时服从下降）以及有不服从榜样的存在。
Ethical criticisms of Milgram's study are significant: participants were deceived, exposed to extreme distress, and did not feel they had a true right to withdraw. Nonetheless, the study sparked important debate about ethics, authority, and human nature.
米尔格拉姆研究的伦理问题备受争议：参与者被欺骗、承受极度痛苦，且未感觉自己能真正自由退出。尽管如此，该研究激发了关于伦理、权威和人性的重要讨论。
10. Psychological Problems: Depression and CBT | 心理问题：抑郁症与认知行为疗法
Major depressive disorder (depression) is a mood disorder characterised by persistent low mood, loss of interest or pleasure (anhedonia), changes in appetite and sleep, fatigue, feelings of worthlessness, and difficulty concentrating. To be diagnosed, symptoms must last at least two weeks and impair daily functioning.
重度抑郁障碍（抑郁症）是一种心境障碍，特征包括持续情绪低落、兴趣或快乐丧失（快感缺失）、食欲与睡眠改变、疲劳、无价值感及注意力困难。诊断要求症状持续至少两周并损害日常功能。
Biological explanations focus on neurotransmitter imbalances, particularly low levels of serotonin, norepinephrine, and dopamine. Genetic vulnerability is supported by family and twin studies. The diathesis-stress model suggests that a biological predisposition combined with environmental stressors triggers depression.
生物学解释聚焦神经递质失衡，尤其是血清素、去甲肾上腺素和多巴胺水平偏低。家庭和双生子研究支持遗传易感性。素质-压力模型认为，生物易感性与环境应激源共同作用，诱发抑郁症。
Cognitive explanations, such as Beck's cognitive triad, propose that depression results from negative automatic thoughts about the self, the world, and the future. These schemas are activated by stressful events and lead to cognitive distortions like catastrophising and overgeneralisation.
认知解释（如贝克的认知三角）认为，抑郁症源于对自我、世界和未来的消极自动思维。这些图式被应激事件激活，并导致灾难化、过度概括等认知歪曲。
Cognitive behavioural therapy (CBT) is an effective treatment that helps clients identify and challenge irrational thoughts and replace them with more realistic ones. Behavioural activation is often included to break the cycle of withdrawal and low mood. CBT is structured, time-limited, and focuses on the here-and-now.
认知行为疗法 (CBT) 是一种有效治疗，帮助来访者识别和挑战非理性思维，并用更现实的思维方式替代。常包含行为激活以打破退缩和情绪低落的恶性循环。CBT 结构化、有时间限制、关注此时此刻。
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