📚 CAIE Year 11 Psychology: Core Knowledge Review | CAIE 高一心理学：核心知识点梳理
This comprehensive guide covers all essential topics in the CAIE Year 11 (IGCSE) Psychology syllabus. It is designed to help students revise key theories, studies, and research methods that form the foundation of the course. Each section pairs English explanations with Chinese translations to support bilingual learners preparing for their examinations.
本综合指南涵盖了 CAIE 高一（IGCSE）心理学课程的所有重要主题。它旨在帮助学生复习构成该课程基础的核心理论、经典研究和研究方法。每个部分都将英文解释与中文翻译配对，以支持双语学习者备考。
1. Research Methods and Ethics | 研究方法与伦理
Psychology is a science, so it relies on systematic methods to investigate behaviour and mental processes. The main research methods include experiments (laboratory, field, natural), observations (participant and non-participant), questionnaires, interviews, correlations, and case studies. Every study must consider ethical guidelines: informed consent, right to withdraw, confidentiality, protection from harm, and deception must be justified. In CAIE, students are expected to evaluate the strengths and weaknesses of each method in terms of reliability, validity, generalisability, and ecological validity.
心理学是一门科学，因此它依靠系统的方法来研究行为和心理过程。主要的研究方法包括实验（实验室、实地、自然实验）、观察（参与式和非参与式）、问卷、访谈、相关研究和个案研究。每项研究都必须考虑伦理准则：知情同意、退出权、保密性、避免伤害以及欺骗须有正当理由。在 CAIE 考试中，学生需从信度、效度、可推广性和生态效度等角度评估每种方法的优缺点。
Independent variable (IV) is manipulated by the researcher, the dependent variable (DV) is measured, and extraneous variables must be controlled. A laboratory experiment offers high control but low ecological validity, while a field experiment offers higher ecological validity but less control. Correlational studies show relationships but cannot prove causation.
自变量（IV）由研究者操纵，因变量（DV）被测量，而无关变量必须被控制。实验室实验控制度高但生态效度低，实地实验生态效度较高但控制较少。相关研究显示变量之间的关系，但不能证明因果关系。
Sampling techniques include random, opportunity, volunteer, and stratified sampling. Random sampling reduces bias, but it is often impractical. Opportunity sampling is convenient but can be biased. Ethical issues arise in studies like Milgram’s obedience experiment, where deception and psychological distress were prominent. The British Psychological Society (BPS) provides ethical guidelines that must be followed.
抽样技术包括随机抽样、机会抽样、志愿者抽样和分层抽样。随机抽样可减少偏差，但往往不切实际。机会抽样方便但可能产生偏见。伦理问题在米尔格拉姆的服从实验等研究中凸显，欺骗和心理痛苦显而易见。英国心理学会（BPS）提供了必须遵守的伦理准则。
2. Biological Psychology: The Brain and Neurons | 生物心理学：大脑与神经元
Biological psychology examines how the brain and nervous system influence behaviour. Neurons are specialised cells that transmit information via electrical impulses and chemical signals. The three main types are sensory neurons, relay (inter-) neurons, and motor neurons. The synaptic transmission involves neurotransmitters (e.g., serotonin, dopamine, acetylcholine) crossing the synaptic gap to bind to receptor sites.
生物心理学研究大脑和神经系统如何影响行为。神经元是通过电脉冲和化学信号传递信息的特化细胞。三种主要类型是感觉神经元、中继（中间）神经元和运动神经元。突触传递涉及神经递质（如血清素、多巴胺、乙酰胆碱）穿过突触间隙，与受体位点结合。
The central nervous system (CNS) consists of the brain and spinal cord. Key brain areas include the frontal lobe (decision making, personality), temporal lobe (auditory processing, memory), parietal lobe (sensory integration), and occipital lobe (visual processing). The hippocampus is vital for memory formation, and the amygdala is involved in emotion and fear responses. Phineas Gage’s case famously demonstrated the role of the frontal lobe in personality.
中枢神经系统（CNS）由脑和脊髓组成。关键脑区包括额叶（决策、人格）、颞叶（听觉处理、记忆）、顶叶（感觉整合）和枕叶（视觉处理）。海马体对记忆形成至关重要，杏仁核参与情绪和恐惧反应。菲尼亚斯·盖奇（Phineas Gage）的著名案例证明了额叶在人格中的作用。
Brain scanning techniques such as MRI (structural imaging) and fMRI (functional imaging) allow researchers to study the brain non-invasively. fMRI measures changes in blood flow associated with neural activity, providing insights into localisation of function. The dual-processing theory suggests that the brain processes information both consciously (explicit) and unconsciously (implicit).
脑部扫描技术如MRI（结构成像）和fMRI（功能成像）使研究者能够无创研究大脑。fMRI测量与神经活动相关的血流变化，为功能定位提供证据。双加工理论认为大脑同时进行有意识（外显）和无意识（内隐）信息加工。
3. Memory: Models and Explanations of Forgetting | 记忆：模型与遗忘解释
Memory is the cognitive process of encoding, storing, and retrieving information. The multi-store model (Atkinson and Shiffrin, 1968) proposes three stores: sensory register, short-term memory (STM), and long-term memory (LTM). Information moves from STM to LTM through rehearsal. Capacity and duration vary: STM holds about 7 ± 2 items for up to 30 seconds, while LTM has potentially unlimited capacity and duration.
记忆是编码、储存和提取信息的认知过程。多存储模型（Atkinson & Shiffrin, 1968）提出了三种存储：感觉登记、短时记忆（STM）和长时记忆（LTM）。信息通过复述从STM转入LTM。容量和持续时间各异：STM可容纳约 7±2 个项目，持续长达30秒，而LTM的容量和持续时间可能是无限的。
The working memory model (Baddeley and Hitch, 1974) challenges the idea of a unitary STM. It includes the central executive, phonological loop, visuospatial sketchpad, and episodic buffer. The phonological loop deals with auditory information, and the visuospatial sketchpad handles visual and spatial data. This model explains how we can perform two tasks simultaneously if they use different components.
工作记忆模型（Baddeley & Hitch, 1974）挑战了单一STM的观点。它包括中央执行器、语音回路、视空间画板和情节缓冲器。语音回路处理听觉信息，视空间画板处理视觉和空间数据。该模型解释了当使用不同组件时，我们如何同时执行两项任务。
Explanations of forgetting include interference (proactive and retroactive) and retrieval failure due to lack of cues. Context-dependent forgetting occurs when recall is better in the same environment where encoding took place, as shown by Godden and Baddeley’s (1975) underwater study with divers. State-dependent forgetting refers to the match between internal states, such as mood or intoxication.
遗忘的解释包括干扰（前摄和倒摄）以及因缺乏线索导致的提取失败。情景依存性遗忘表现为，在编码发生时的相同环境中回忆效果更好，正如Godden和Baddeley（1975）的潜水员水下实验所示。状态依存性遗忘指的是内部状态（如情绪或醉酒）的匹配。
4. Perception: Visual Cues and Illusions | 感知：视觉线索与错觉
Perception is the brain’s interpretation of sensory information. Visual perception relies on depth cues: monocular cues (e.g., relative size, linear perspective, texture gradient, superimposition) and binocular cues (retinal disparity, convergence). Gregory’s constructivist theory argues that perception is an active process influenced by past experience, expectations, and hypotheses, often leading to visual illusions.
感知是大脑对感觉信息的解释。视知觉依赖深度线索：单眼线索（如相对大小、线条透视、纹理梯度、重叠）和双眼线索（视网膜象差、辐合）。Gregory的建构主义理论认为感知是一个主动过程，受过去经验、预期和假设的影响，往往导致视错觉。
Gibson’s direct theory of perception, in contrast, proposes that perception is innate and directly driven by the ambient optic array without need for cognitive processing. Affordances are environmental cues that directly suggest action possibilities. The Muller-Lyer illusion supports constructivism because culture and experience with buildings influence perception; some non-Western cultures are less susceptible.
相反，Gibson的直接知觉理论提出，知觉是天生的，由周围光流直接驱动，无需认知加工。功能可见性（affordances）是暗示行动可能的环境线索。缪勒-莱尔错觉（Müller-Lyer illusion）支持建构主义，因为不同文化和建筑经验影响感知；某些非西方文化的人不太易受此错觉影响。
Depth perception develops early. The visual cliff experiment (Gibson and Walk, 1960) showed that infants and animals avoid the apparent drop, suggesting innate depth perception, though learning may also play a role. Perceptual constancies (size, shape, colour, brightness) allow us to perceive objects as stable despite changes in sensory input.
深度知觉发育较早。视觉悬崖实验（Gibson & Walk, 1960）表明，婴儿和动物会避开明显陡坡，表明深度知觉可能是先天的，尽管学习也起一定作用。知觉恒常性（大小、形状、颜色、亮度）使我们感觉物体稳定，尽管感觉输入发生变化。
5. Cognitive Development: Piaget and Vygotsky | 认知发展：皮亚杰与维果茨基
Cognitive development concerns how thinking and reasoning abilities change from infancy to adulthood. Jean Piaget proposed a stage theory: sensorimotor (0-2 years), preoperational (2-7), concrete operational (7-11), and formal operational (11+). Key achievements include object permanence, conservation, egocentrism, and abstract logical thinking. Piaget used clinical interviews and observations, like the three mountains task, to show children’s limitations at each stage.
认知发展关注思维和推理能力从婴儿到成年的变化。让·皮亚杰（Jean Piaget）提出了阶段理论：感知运动阶段（0-2岁）、前运算阶段（2-7岁）、具体运算阶段（7-11岁）和形式运算阶段（11岁以上）。关键成就包括客体永久性、守恒、自我中心和抽象逻辑思维。皮亚杰使用临床访谈和观察（如三山任务）来展示儿童在各阶段的局限性。
Lev Vygotsky’s sociocultural theory emphasises the role of social interaction and culture. He introduced the zone of proximal development (ZPD), which is the difference between what a child can do alone and what they can achieve with guidance. Scaffolding is the temporary support provided by more knowledgeable others (MKOs). Language is a crucial tool for cognitive development, initially serving social communication before becoming internalised as inner speech.
维果茨基（Lev Vygotsky）的社会文化理论强调社会互动和文化的作用。他提出了最近发展区（ZPD），即儿童独立完成与在指导下所能达到水平之间的差距。脚手架是更有知识的他人（MKO）提供的临时支持。语言是认知发展的关键工具，最初用于社会交往，后来内化为内部言语。
Modern research shows that both nature and nurture interact. Baillargeon’s violation-of-expectation method suggests infants understand object permanence earlier than Piaget proposed. Cognitive development is not strictly stage-like; changes can be gradual and dependent on task context and cultural practices.
现代研究表明天性和教养相互作用。Baillargeon的违背预期方法表明婴儿理解客体永久性比皮亚杰提出的更早。认知发展并非严格按阶段进行；变化可能渐进，并取决于任务情境和文化实践。
6. Social Influence: Conformity and Obedience | 社会影响：从众与服从
Social influence investigates how individuals’ thoughts, feelings, and behaviours are affected by others. Conformity is a change in behaviour or belief due to real or imagined group pressure. Asch’s (1951) line judgement experiment showed that many participants conformed to an obviously incorrect majority, demonstrating normative social influence (desire to fit in) and informational social influence (belief that the group is better informed).
社会影响研究个体的思想、情感和行为如何受他人影响。从众是由于真实或想象的群体压力而改变行为或信念。阿希（Asch, 1951）的线段判断实验显示，许多参与者顺从明显错误的大多数，展示了规范社会影响（渴望融入）和信息社会影响（相信群体更知情）。
Obedience involves following direct commands from an authority figure. Milgram’s (1963) obedience study found that 65% of participants administered the maximum 450-volt shock to a learner when instructed by an experimenter, despite hearing cries of pain. This study highlighted situational factors over dispositional ones: the presence of an authority figure in a prestigious setting, gradual commitment, and the agentic state (shifting responsibility to the authority) all increased obedience.
服从涉及遵从权威人物的直接命令。米尔格拉姆（Milgram, 1963）的服从研究发现，65%的参与者在实验者指令下对学习者施加了最高 450 伏电击，尽管听到痛苦叫喊。该研究强调了情境因素而非性格因素：在著名场所中权威人物的存在、渐进承诺以及代理状态（将责任转移给权威）均提高了服从水平。
Minority influence can also lead to social change, as shown by Moscovici et al. (1969) where a consistent minority influenced the majority’s colour perception. Bystander intervention is reduced when more people are present, known as the bystander effect, due to diffusion of responsibility and pluralistic ignorance. Latane and Darley (1968) proposed a five-step decision model for helping behaviour.
少数派影响也能导致社会变革，如莫斯科维奇（Moscovici et al., 1969）的研究所示，持有一致性观点的少数派影响了多数派的颜色感知。旁观者干预在更多人存在时减少，称为旁观者效应，归因于责任分散和多元无知。拉坦和达利（Latane & Darley, 1968）提出了帮助行为的五步决策模型。
7. Attachment Theory and Early Relationships | 依恋理论与早期关系
Attachment is a deep emotional bond that develops between an infant and their primary caregiver, typically within the first year of life. Bowlby’s evolutionary theory proposes that attachment is innate and serves a survival function. He emphasised the critical period (up to 2-3 years) and the internal working model, which shapes future relationships.
依恋是婴儿与主要照顾者在出生后一岁内发展起来的一种深厚情感纽带。鲍尔比（Bowlby）的进化理论认为依恋是天生的，具有生存功能。他强调了关键期（0-3岁）和内部工作模型，该模型塑造未来的人际关系。
Mary Ainsworth’s ‘Strange Situation’ procedure identified three attachment types: secure (Type B), insecure-avoidant (Type A), and insecure-resistant (Type C). A fourth category, disorganised (Type D), was later added. Securely attached infants explore freely, show distress at separation, and are easily comforted upon reunion; maternal sensitivity is a key predictor of secure attachment. Cultural variations exist: for example, Japanese infants show more resistant behaviour, possibly due to different caregiving practices.
玛丽·安斯沃思（Mary Ainsworth）的’陌生情境’程序区分了三种依恋类型：安全型（B型）、不安全-回避型（A型）和不安全-反抗型（C型）。后来增加了第四类——混乱型（D型）。安全型依恋的婴儿自由探索，分离时表现出痛苦，重聚时容易得到安慰；母亲敏感度是安全型依恋的关键预测因子。文化差异也存在：例如，日本婴儿表现出更多反抗行为，可能源于不同的育儿实践。
Deprivation and privation have serious consequences. Bowlby’s maternal deprivation hypothesis suggests that prolonged separation can lead to emotional maladjustment and even affectionless psychopathy, as illustrated by his 44 juvenile thieves study. However, Rutter’s research distinguished between deprivation (loss of existing attachment) and privation (never forming an attachment), showing that privation leads to more severe outcomes like disinhibited attachment disorder.
剥夺与缺失有严重后果。鲍尔比的母性剥夺假说认为，长期分离可导致情绪失调甚至冷漠型精神病态，这在他对44名少年盗窃犯的研究中有所体现。然而，鲁特（Rutter）的研究区分了剥夺（失去已有依恋）和缺失（从未形成依恋），表明缺失导致更严重的后果，如脱抑制性依恋障碍。
8. Psychological Problems: Depression and Schizophrenia | 心理问题：抑郁症与精神分裂症
The CAIE syllabus covers psychological problems such as depression and schizophrenia. Depression is a mood disorder characterised by persistently low mood, loss of interest (anhedonia), fatigue, and disturbances in sleep and appetite. One cognitive explanation is Beck’s negative triad: negative views of self, world, and future, maintained by cognitive distortions such as overgeneralisation and catastrophising. The learned helplessness model (Seligman) suggests that repeated failure leads to a belief that outcomes are uncontrollable.
CAIE 课程涵盖抑郁症和精神分裂症等心理问题。抑郁症是一种心境障碍，特征是持续情绪低落、兴趣丧失（快感缺失）、疲劳及睡眠和食欲紊乱。一个认知解释是贝克的负性三联征：对自我、世界和未来的负面看法，由过度概括和灾难化等认知扭曲维持。习得性无助模型（塞利格曼）表明，反复失败会导致认为结果不可控的信念。
Biological explanations of depression include the monoamine hypothesis, suggesting low levels of serotonin, noradrenaline, and dopamine. Genetic factors are supported by twin studies showing higher concordance in MZ twins. Treatments range from cognitive-behavioural therapy (CBT) to antidepressant medications like SSRIs, which increase serotonin availability. Evaluating therapies involves considering effectiveness, side effects, and ethical issues.
抑郁症的生物学解释包括单胺假说，即血清素、去甲肾上腺素和多巴胺水平低下。遗传因素得到双胞胎研究的支持，显示同卵双胞胎一致性更高。治疗方法从认知行为疗法（CBT）到抗抑郁药如SSRI（选择性血清素再摄取抑制剂），后者增加血清素利用率。评估疗法需要考虑有效性、副作用和伦理问题。
Schizophrenia is a severe mental disorder characterised by delusions, hallucinations, disorganised speech, and negative symptoms (e.g., avolition, alogia). The dopamine hypothesis proposes that overactivity of dopamine pathways, especially in the mesolimbic system, leads to positive symptoms. Brain imaging shows enlarged ventricles and reduced frontal lobe activity. Treatment includes typical and atypical antipsychotics, which block dopamine receptors, and psychosocial interventions like family therapy and social skills training. The diathesis-stress model integrates biological vulnerability and environmental triggers.
精神分裂症是一种严重的精神障碍，特征包括妄想、幻觉、言语紊乱和阴性症状（如意志缺乏、言语贫乏）。多巴胺假说认为，多巴胺通路（尤其是中脑边缘系统）的过度活跃导致阳性症状。脑成像显示脑室扩大和额叶活动减少。治疗包括典型和非典型抗精神病药（阻断多巴胺受体），以及心理社会干预如家庭治疗和社交技能训练。素质-应激模型整合了生物易感性与环境触发因素。
9. Data Handling and Analysis | 数据处理与分析
Psychological studies produce data that must be analysed using descriptive and inferential statistics. Descriptive statistics include measures of central tendency (mean, median, mode) and measures of spread (range, variance, standard deviation). The mean is sensitive to extreme scores, while the median is more robust for skewed distributions. Bar charts, histograms, and scatterplots are common visual displays.
心理学研究产生的数据需用描述性和推断统计进行分析。描述性统计包括集中趋势量数（平均数、中位数、众数）和离中量数（极差、方差、标准差）。平均数对极端分数敏感，而中位数在偏态分布中更稳健。条形图、直方图和散点图是常见的可视化方式。
Inferential statistics allow researchers to decide if results are significant. A p-value < 0.05 is a conventional threshold, meaning there is less than a 5% probability that results are due to chance. Types of inferential tests include Mann-Whitney U (independent designs, ordinal data), Wilcoxon signed-rank (repeated measures, ordinal), Spearman's rho (correlation), and Chi-squared (nominal data, frequency). Students should understand when to apply each test, referencing experimental design (independent measures, repeated measures, matched pairs) and level of measurement (nominal, ordinal, interval/ratio).
推断统计帮助研究者判断结果是否显著。通常以p值 < 0.05 为阈值，意味着结果由偶然因素导致的概率低于 5%。推断检验类型包括曼-惠特尼 U 检验（独立设计，顺序数据）、威尔科克森符号秩（重复测量，顺序数据）、斯皮尔曼等级相关系数（相关）和卡方检验（类别数据，频数）。学生应理解何时使用每种检验，需考虑实验设计（独立组、重复测量、匹配组）和测量水平（名称、顺序、等距/比率）。
Ethical reporting requires presenting results honestly, acknowledging limitations, and avoiding data fabrication. Researchers must also consider reliability (consistency) and validity (accuracy). Internal validity asks whether the IV truly caused changes in the DV; external validity concerns generalisability. Standardised procedures and random allocation enhance internal validity.
伦理报告要求诚实呈现结果、承认局限性并避免数据造假。研究者还必须考虑信度（一致性）和效度（准确性）。内部效度询问 IV 是否真正引起了 DV 的变化；外部效度关乎可推广性。标准化程序和随机分配可提高内部效度。
10. Issues and Debates in Psychology | 心理学议题与辩论
Psychology is shaped by ongoing debates about how best to explain human behaviour. The nature vs. nurture debate questions the relative contributions of genetics (nature) and environment/learning (nurture). Studies on intelligence, for example, show both genetic heritability and environmental influences like enriched education. Most contemporary psychologists adopt an interactionist approach, recognising that the two forces intertwine.
心理学受到持续辩论的影响，即如何最好地解释人类行为。天性-教养之争探问遗传（天性）和环境/学习（教养）的相对贡献。例如智力研究显示，既有遗传性也有丰富教育等环境影响。多数当代心理学家采取交互性观点，承认两种力量相互交织。
The free will vs. determinism debate contrasts the idea that we freely choose actions with determinism, which argues behaviour is caused by internal or external factors we cannot control. Biological determinism points to genes and neurotransmitters; environmental determinism emphasises conditioning and social forces. Humanistic psychologists argue for free will, while cognitive psychology often adopts a soft determinism stance.
自由意志-决定论之争对比了我们自由选择行为的观点与决定论，后者主张行为由我们无法控制的内部或外部因素引起。生物决定论指向基因和神经递质；环境决定论强调条件作用和社会力量。人本主义心理学家主张自由意志，而认知心理学常采取软性决定论立场。
Reductionism attempts to explain complex phenomena by breaking them down into simpler components. Biological reductionism explains behaviour at the neuronal or neurotransmitter level; environmental reductionism reduces behaviour to stimulus-response associations. Holism argues that the whole is greater than the sum of its parts, as seen in the work of humanistic and some social psychologists.
还原论试图通过将复杂现象分解为更简单的成分来解释它们。生物还原论在神经元或神经递质层面解释行为；环境还原论将行为简化为刺激-反应关联。整体论认为整体大于部分之和，如人本主义和某些社会心理学家的研究所示。
Ethnocentrism is the tendency to perceive ‘our’ group as the standard and to judge others by it. Ainsworth’s Strange Situation has been criticised for imposing Western norms on child-rearing, potentially misclassifying children from other cultures. Researchers must adopt a culturally relative perspective to avoid bias. Additionally, gender bias (alpha and beta bias) and social sensitivity are important considerations when designing and reporting studies.
民族中心主义是一种倾向，将’我们’群体视为标准，并以此评判他人。安斯沃思的陌生情境被批评将西方规范强加于育儿上，可能误判其他文化的儿童。研究者必须采用文化相对主义视角以避免偏见。此外，性别偏见（alpha 和 beta 偏见）以及社会敏感性是设计和报告研究时的重要考量。
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