📚 Year 9 Cambridge Psychology: Key Concepts Revision | Year 9 Cambridge 心理学：核心知识点梳理
Welcome to your Year 9 Cambridge Psychology revision guide. This article summarises the core concepts you will encounter when starting your journey in psychology. Understanding the scientific study of mind and behaviour will help you build a strong foundation for IGCSE and beyond.
欢迎阅读 Year 9 Cambridge 心理学复习指南。本文梳理了你在开启心理学学习之旅时会遇到的核心概念。理解心智与行为的科学研究，将帮你打下扎实的IGCSE及后续学业基础。
1. Psychology: The Science of Mind and Behaviour | 心理学：心智与行为的科学
Psychology is defined as the scientific study of the mind and behaviour. It uses empirical methods to investigate how we think, feel, and act in different situations. Key approaches include biological, cognitive, and social perspectives.
心理学被定义为心智与行为的科学研究。它采用实证方法探究我们在不同情境中如何思考、感受和行动。主要视角包括生物学、认知和社会取向等。
The term 'psychology' comes from the Greek words 'psyche' (soul) and 'logos' (study). Historically, psychology emerged from philosophy and physiology, becoming an independent science in the late 19th century when Wilhelm Wundt opened the first psychology laboratory in Leipzig in 1879.
“心理学”一词源于希腊语“psyche”（灵魂）和“logos”（研究）。历史上，心理学脱胎于哲学和生理学，在 19 世纪末成为独立科学，当时威廉·冯特于 1879 年在莱比锡建立了第一个心理学实验室。
A major debate in psychology is the nature versus nurture argument: to what extent our behaviour is determined by genetic inheritance (nature) or by our environment and experiences (nurture).
心理学中的一项重大争论是天性与教养之辩：即我们的行为在多大程度上由遗传（天性）或环境及经验（教养）决定。
Psychologists explore phenomena across different levels of explanation, from biological (e.g., brain chemistry) to cognitive (e.g., thought processes) to sociocultural (e.g., group norms). This biopsychosocial approach helps us understand complex behaviours more fully.
心理学家从不同解释层面探究现象，从生物学（如脑化学）到认知（如思维过程）再到社会文化（如群体规范）。这种生物心理社会取向有助于我们更全面地理解复杂行为。
2. Research Methods in Psychology | 心理学研究方法
Psychologists use a variety of research methods to gather data. The most common include experiments, observations, surveys, and case studies. An experiment involves the manipulation of an independent variable (IV) to observe its effect on a dependent variable (DV), while controlling extraneous variables.
心理学家运用多种研究方法收集数据。最常见的方法包括实验、观察、问卷调查和个案研究。实验涉及操纵自变量（IV）以观察其对因变量（DV）的影响，同时控制额外变量。
Laboratory experiments are conducted in controlled environments, providing high internal validity. Field experiments take place in natural settings, offering greater ecological validity but less control. Natural experiments examine naturally occurring changes in the IV where the researcher does not manipulate variables directly.
实验室实验在受控环境中进行，内部效度高。现场实验在自然环境中进行，生态效度更高，但控制较少。自然实验考察自变量自然发生的变化，研究者不直接操纵变量。
Correlational research looks for relationships between two variables, expressed as a correlation coefficient between -1 and +1. A positive correlation means both variables increase together, while a negative correlation means one increases as the other decreases. Remember, correlation does not imply causation.
相关研究寻找两个变量之间的关系，用 -1 到 +1 之间的相关系数表示。正相关意味着两个变量一同增加，负相关意味着一个增加另一个减少。记住，相关不能推断因果。
Ethical guidelines are crucial. Researchers must obtain informed consent, ensure confidentiality, avoid harm, and provide the right to withdraw. Deception should be minimised, and participants must be debriefed afterwards.
伦理准则至关重要。研究者必须获得知情同意，确保保密，避免伤害，并提供退出权利。欺骗应尽量减少，事后必须对参与者进行解释说明。
Sampling methods are important for generalisability. Random sampling gives everyone an equal chance; stratified sampling ensures subgroups are represented; and opportunity sampling selects whoever is available. Each method has strengths and limitations in terms of bias.
抽样方法对推广性很重要。随机抽样使人有均等机会；分层抽样确保子群体被代表；便利抽样选取最易获取的人。每种方法在偏差方面都有优势和局限。
3. Memory: Encoding, Storage and Retrieval | 记忆：编码、储存与提取
Memory refers to the processes used to encode, store, and retrieve information. The multi-store model proposed by Atkinson and Shiffrin describes three distinct stores: sensory memory, short-term memory (STM), and long-term memory (LTM). Information passes through these stores under the control of attention and rehearsal.
记忆指用于编码、储存和提取信息的过程。阿特金森和谢弗林提出的多存储模型描述了三个不同的储存库：感觉记忆、短时记忆（STM）和长时记忆（LTM）。信息在注意和复述的控制下经过这些储存库。
attention moves to STM. STM has a limited capacity of about 7±2 items, according to Miller's magic number, and a duration of around 18–30 seconds without rehearsal.
感觉记忆极短时地（图像记忆不足一秒）储存来自感官的信息。只有受到注意的信息才会进入短时记忆。短时记忆容量有限，根据米勒的神奇数字约为 7±2 个项目，在没有复述的情况下持续时间约 18–30 秒。
Rehearsal helps transfer information to LTM, which has potentially unlimited capacity and duration. There are different types of LTM: episodic (personal events), semantic (facts and knowledge), and procedural (skills and actions).
复述有助于将信息转入长时记忆，长时记忆的容量和持续时间近乎无限。长时记忆有不同类型：情景记忆（个人事件）、语义记忆（事实和知识）和程序性记忆（技能和动作）。
Bartlett's theory of reconstructive memory argues that memory is not a passive recording but an active process of reconstruction, influenced by schemas (mental frameworks). This can lead to distortions and omissions. For instance, when recalling 'The War of the Ghosts', participants altered the story to fit their own cultural schemas.
巴特利特的重构记忆理论认为，记忆不是被动记录，而是一个主动重构的过程，受到图式（心理框架）的影响。这可能导致记忆扭曲和遗漏。例如，在回忆“幽灵之战”故事时，参与者会改变故事以符合自己的文化图式。
Another important concept is levels of processing: deeper, semantic processing leads to better long-term retention than shallow, structural processing. Craik and Lockhart's research showed that elaborative rehearsal is more effective than mere repetition.
另一个重要概念是加工水平：深层的语义加工比浅层的结构加工带来更好的长期记忆保持。克雷克和洛克哈特的研究表明，精细复述比简单重复更有效。
4. Perception: How We Make Sense of the World | 感知：我们如何理解世界
Sensation is the process by which our sensory receptors detect stimuli, whereas perception is how our brain organizes and interprets this sensory information. Perception can be influenced by both bottom-up processing (data-driven) and top-down processing (influenced by expectations and prior knowledge).
感觉是我们的感觉感受器探测刺激的过程，而感知是大脑组织和解释这些感觉信息的方式。感知既受到自下而上加工（数据驱动）的影响，也受到自上而下加工（受期望和先前知识影响）的影响。
Visual perception relies on depth cues. Binocular depth cues include retinal disparity (the slightly different image on each retina) and convergence (the inward turning of the eyes). Monocular cues include relative size, texture gradient, linear perspective, and superimposition.
视觉感知依赖深度线索。双眼深度线索包括双眼视差（两个视网膜上略有不同的影像）和辐合（双眼内转）。单眼线索包括相对大小、纹理梯度、直线透视和重叠。
Perceptual constancy allows us to perceive objects as stable despite changes in the retinal image, such as size constancy and shape constancy. Illusions, such as the Müller-Lyer illusion, reveal how our perceptual system can be tricked by certain cues.
知觉恒常性使我们尽管视网膜影像变化，仍能感知物体稳定，例如大小恒常性和形状恒常性。错觉，如缪勒-莱耶错觉，揭示了我们的感知系统如何被某些线索所欺骗。
Gibson's direct theory of perception claims that perception is innate and requires no learning, as the environment contains sufficient information (affordances). Gregory's constructivist theory argues that perception is a construction based on inference and past experience, so the brain actively interprets ambiguous stimuli.
吉布森的知觉直接理论声称感知是天生的，无需学习，因为环境包含了充足的信息（功能承受性）。格雷戈里的建构主义理论认为感知是基于推断和过往经验的一种建构，因此大脑会主动解释模糊刺激。
Culture can also shape perception. For example, research on the interpretation of visual illusions such as the Müller-Lyer illusion shows that people from cultures with more carpentered environments (straight lines and corners) are more susceptible to it, highlighting the role of experience.
文化也能塑造感知。例如，对视觉错觉如缪勒-莱耶错觉解释的研究显示，来自更多“木匠化环境”（充满直线与直角）文化的人更容易受其影响，这突显了经验的作用。
5. Social Influence: Conformity and Obedience | 社会影响：从众与服从
Social influence examines how individuals' thoughts, feelings, and behaviours are affected by others. Conformity is a change in behaviour or belief to fit in with a group. Asch's line judgement study (1951) demonstrated that many participants conformed to an obviously wrong majority answer to avoid social disapproval.
社会影响研究个体的思想、情感和行为如何受他人影响。从众是为了适应群体而改变行为或信念。阿什的线段判断研究 (1951) 表明，许多参与者会屈从于明显错误的大多数答案，以避免社会不认可。
Normative social influence involves conformity to gain social approval and avoid rejection, while informational social influence occurs when someone conforms because they believe the group is better informed. Asch found conformity decreased with a dissenting partner.
规范社会影响是指为了获得社会认可和避免排斥而从众，信息社会影响则是指个体因相信群体更知情而从众。阿什发现，有一个反对的同伴会降低从众率。
Obedience refers to following direct orders from an authority figure. Milgram's electric shock experiment (1963) revealed that 65% of participants delivered what they believed were severe shocks to a learner, simply because an authority figure instructed them to continue.
服从指听从权威人物的直接指令。米尔格拉姆的电击实验 (1963) 揭示，65% 的参与者对一名学习者施加了他们以为严重的电击，仅仅因为权威人物要求他们继续。
Factors affecting obedience include proximity of the authority figure, legitimacy of the setting, and the presence of disobedient peers. Milgram's work raised significant ethical debates about deception and psychological harm.
影响服从的因素包括权威人物的接近性、环境的正当性以及有违背的同辈存在。米尔格拉姆的研究引发了关于欺骗和心理伤害的重大伦理争议。
Minority influence can also lead to social change. If a minority is consistent, committed, and flexible in their viewpoint, it can
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