📚 AS OCR Psychology: Core Knowledge Consolidation | AS OCR 心理学：核心知识点梳理
Welcome to your one-stop revision guide for the AS OCR Psychology specification. This article systematically covers the essential knowledge areas, from research methods and ethical principles to all 20 core studies across social, cognitive, developmental, biological, and individual differences psychology. Whether you’re revising for mocks or the final exam, this consolidation will help you organise your thinking and sharpen your evaluation skills.
欢迎阅读 AS OCR 心理学一站式复习指南。本文系统梳理了必考核心知识，包括研究方法、伦理准则，以及涵盖社会、认知、发展、生物和个体差异五大领域的全部 20 项核心研究。不论是在准备模考还是最终大考，本文都能帮助你整理知识框架、提升评估技能。
1. Research Methods and Ethics | 研究方法与伦理
Psychology seeks to describe, explain, predict, and control behaviour through empirical research. The main research methods in AS OCR include experiments (laboratory, field, natural, and quasi), correlations, observations, questionnaires, and interviews. An independent variable (IV) is manipulated to observe its effect on a dependent variable (DV), measured under controlled conditions. Operationalisation means defining variables precisely so they can be measured or manipulated.
心理学通过实证研究来描述、解释、预测和控制行为。AS OCR 的主要研究方法包括实验（实验室实验、现场实验、自然实验和准实验）、相关研究、观察、问卷和访谈。操纵自变量以观察其对因变量的影响，并在控制条件下测量因变量。操作化意味着精确界定变量，以便对其进行测量或操纵。
Correlational studies examine the relationship between two co-variables without direct manipulation; a correlation coefficient (r) between -1 and +1 indicates strength and direction. Observational techniques range from naturalistic to controlled and can be participant or non-participant. Self-report methods, such as questionnaires and structured interviews, gather subjective data about beliefs, attitudes, and experiences.
相关研究在不直接操纵变量的情况下考察两个协变量之间的关系；相关系数（r）在 -1 到 +1 之间，表明关系的强度和方向。观察技术涵盖自然观察到控制观察，又分为参与式和非参与式。自我报告法（如问卷和结构化访谈）收集关于信念、态度和经历的主观数据。
All research must adhere to the British Psychological Society (BPS) ethical guidelines: informed consent, avoidance of deception unless justified and followed by thorough debriefing, protection from harm, right to withdraw, and confidentiality. Cost–benefit analysis is used when judging whether the potential gains outweigh the ethical costs.
所有研究都必须遵守英国心理学会（BPS）的伦理准则：知情同意、避免欺骗（除非有充分理由并做好事后解释）、保护参与者免受伤害、有权退出以及保密。在判断研究价值时，采用成本–收益分析法，权衡潜在收益是否大于伦理代价。
2. Experimental Designs and Controls | 实验设计与控制
Three main experimental designs are tested across the AS core studies. In an independent groups design, different participants take part in each condition. This avoids order effects but requires more participants and may suffer from participant variables. Random allocation helps control these differences.
AS 核心研究中涉及三种主要实验设计。独立组设计中，不同被试参与不同条件。这避免了顺序效应，但需要更多被试，且可能受被试变量影响。随机分配有助于控制这些差异。
In a repeated measures design, the same participants experience all conditions. Participant variables are eliminated, but order effects (boredom, fatigue, practice) can bias results. Counterbalancing, such as AB/BA ordering, is used to spread order effects evenly.
重复测量设计中，同一批被试接受所有条件处理。这消除了被试变量，但顺序效应（厌烦、疲劳、练习）可能影响结果。可采用 AB/BA 平衡顺序法等方法来抵消顺序效应。
A matched pairs design matches participants on key characteristics before allocating them to conditions. It controls for participant variables without order effects, but matching is time-consuming and imperfect. Control measures – standardisation, randomisation, and single- or double-blind procedures – enhance internal validity across all designs.
匹配对设计根据关键特征匹配被试，再分派到不同条件。它控制了被试变量且无顺序效应，但匹配过程耗时且无法完美匹配。控制措施——标准化、随机化以及单盲或双盲程序——能够提高所有设计的内部效度。
3. Data Handling and Analysis | 数据处理与分析
Descriptive statistics summarise data sets. Measures of central tendency – mean, median, mode – describe the typical score. The mean is sensitive to outliers, while the median is more robust for skewed data. Measures of dispersion include range and standard deviation; a larger standard deviation indicates greater spread.
描述统计用于汇总数据集。集中趋势量（平均值、中位数、众数）描述典型分数。平均值对异常值敏感，而非对称数据更适合用中位数。离散量包括全距和标准差；标准差越大，数据分布越广。
Data can be presented in bar charts (discrete categories), histograms (continuous data), and scatter graphs (correlations). The standard deviation is calculated using the formula:
数据可用条形图（离散类别）、直方图（连续数据）和散点图（相关数据）呈现。标准差的计算公式如下：
s = √(∑(x − x̄)² / (n − 1))
Inferential statistics allow researchers to draw conclusions about populations from sample data. A probability level of p ≤ 0.05 usually indicates a statistically significant result, meaning there is less than a 5% risk that the observed effect is due to chance. Type I error occurs when a researcher wrongly claims a significant difference; Type II error is failing to detect a real difference.
推断统计让研究者能够从样本数据推断总体特征。通常以概率水平 p ≤ 0.05 作为统计显著性的标准，意味着观察到的效应由偶然造成的风险低于 5%。第一类错误是错误地宣称存在显著差异；第二类错误是未能检测到真实存在的差异。
4. Social Psychology Core Studies | 社会心理学核心研究
Social psychology investigates how the real or imagined presence of others affects behaviour. The four core studies address obedience, bystander intervention, disobedience/whistleblowing, and cross-cultural helping.
社会心理学探究他人真实或想象的存在如何影响行为。四个核心研究分别关注服从、旁观者干预、不服从/举报以及跨文化助人行为。
Milgram (1963) – Obedience: An experimenter ordered participants to administer increasingly intense shocks to a ‘learner’. 65% obeyed up to the maximum 450 V, revealing the powerful influence of authority and situational pressure.
米尔格拉姆（1963）——服从：实验者命令参与者对“学习者”施加逐渐增强的电击。65% 的参与者最终服从指示，一直施加到最高 450 伏，揭示了权威和情境压力的强大影响。
Piliavin et al. (1969) – Bystander intervention: In a naturalistic field experiment on the New York subway, a confederate appeared to need help. The response depended on the victim’s apparent condition (drunk v. ill) and group size; cost–reward calculations influenced helping.
皮利亚文等人（1969）——旁观者干预：在纽约地铁的自然现场实验中，一名同谋者表现出需要帮助。反应取决于受害者的表面状况（醉汉 vs. 病人）和群体规模；成本–回报评估影响着助人行为。
Bocchiaro et al. (2012) – Disobedience: Participants were asked to write an unethical testimonial. Contrary to predictions, 76.5% obeyed, while 14.1% blew the whistle. Personality traits did not predict whistleblowing, highlighting situational forces.
博基亚罗等人（2012）——不服从：参与者被要求撰写不道德的推荐信。与预期相反，76.5% 的人服从了，只有 14.1% 的人举报。人格特质不能预测举报行为，这突出了情境力量的作用。
Levine et al. (2001) – Cross-cultural helping: In 23 cities worldwide, scenarios of a dropped pen, hurt leg, and blind person needing assistance showed that helping rates vary by culture, with economic productivity (PPP) correlating negatively with helping.
莱文等人（2001）——跨文化助人：在全球 23 个城市中，通过掉落钢笔、受伤腿和盲人求助等情景，发现助人率因文化而异，经济生产力与助人行为呈负相关。
Evaluation: Social studies often sacrifice ecological validity for control. Milgram raised major ethical concerns, leading to stricter guidelines, while field studies (Piliavin, Levine) improved external validity but reduced control.
评价：社会心理学研究常在控制与生态效度之间权衡。米尔格拉姆引发了重大伦理争议，推动了更严格的准则；现场研究（皮利亚文、莱文）提高了外部效度，但削弱了控制。
5. Cognitive Psychology Core Studies | 认知心理学核心研究
Cognitive psychology studies internal mental processes, such as attention, memory, and perception. The four core studies examine selective auditory attention, reconstructive eyewitness memory, inattentional blindness, and context-dependent memory.
认知心理学研究内部心理过程，如注意、记忆和知觉。四个核心研究考察了选择性听觉注意、目击者记忆的重构性、非注意盲以及背景依赖记忆。
Moray (1959) – Selective attention: Using a dichotic listening task, Moray found that participants noticed very little of the rejected message, but could detect their own name in about one-third of trials, supporting Cherry’s ‘cocktail party phenomenon’.
莫瑞（1959）——选择性注意：通过双耳分听任务，莫瑞发现参与者几乎注意不到未被追随的信息，但约三分之一的被试能察觉自己的名字，支持了切里提出的“鸡尾酒会现象”。
Loftus & Palmer (1974) – Eyewitness testimony: Participants viewed a car crash and were asked leading questions. The verb used (smashed v. contacted) significantly affected speed estimates; 32% reported seeing broken glass when none existed, showing memory reconstruction.
洛夫特斯和帕尔默（1974）——目击证词：参与者观看车祸视频并回答引导性问题。使用的动词（如“撞碎” vs. “碰触”）显著影响了速度估计；32% 的人报告看到了实际上不存在的碎玻璃，表明记忆重构的存在。
Simons & Chabris (1999) – Inattentional blindness: Participants counted basketball passes and often failed to notice a person in a gorilla suit walking through the scene. This demonstrates the limitations of attention and the phenomenon of ‘change blindness’.
西蒙斯和沙布里（1999）——非注意盲：参与者在计数篮球传球次数时，经常注意不到一个穿着大猩猩服装的人走过。这证明了注意的局限性以及“变化盲”现象。
Grant et al. (1998) – Context-dependent memory: Participants studied and recalled material in either matching or mismatching contexts (silent v. noisy). Recall was significantly better in matching conditions, echoing the encoding specificity principle.
格兰特等人（1998）——背景依赖记忆：参与者在匹配或不匹配的背景（安静 vs. 嘈杂）下学习和回忆材料。匹配条件下的回忆成绩显著更好，呼应了编码特定性原则。
Evaluation: Laboratory settings ensure high internal validity but low ecological validity. Cognitive studies also tend to be reductionist, breaking processes into components, yet they have useful real-world applications in courtroom and educational settings.
评价：实验室环境确保了高内部效度，但生态效度较低。认知研究通常带有还原论倾向，将心理过程拆解为组分，但它们在法庭和教育等领域具有实际应用价值。
6. Developmental Psychology Core Studies | 发展心理学核心研究
Developmental psychology explores how people change and grow over the lifespan
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