📚 AP Psychology Key Concepts Review Notes | AP 心理学知识点笔记总结
Welcome to the comprehensive AP Psychology review notes. This guide distills the key concepts, theories, and research methods needed for the exam. Each section pairs concise English explanations with Chinese translations to strengthen your bilingual understanding of psychology.
欢迎阅读这份 AP 心理学综合复习笔记。本指南浓缩了考试必备的核心概念、理论和研究方法。每个部分都以清晰的英文解释搭配中文翻译，帮助强化你对心理学的双语理解。
1. Scientific Foundations of Psychology | 心理学的科学基础
Psychology is the scientific study of behavior and mental processes. Early schools included structuralism (Titchener, introspection) and functionalism (James, adaptive functions). Contemporary perspectives range from behavioral and psychodynamic to cognitive, biological, evolutionary, and sociocultural approaches.
心理学是对行为和心理过程的科学研究。早期流派有结构主义（铁钦纳，内省法）和功能主义（詹姆斯，适应性功能）。当代视角从行为主义、精神动力学到认知、生物学、进化和社会文化取向。
Research methods allow psychologists to test hypotheses. Experiments manipulate an independent variable to measure a dependent variable, using random assignment to control for confounds. Correlational studies reveal relationships but do not imply causation. Other methods include surveys, naturalistic observations, and case studies.
研究方法使心理学家能够检验假设。实验通过操纵自变量来测量因变量，并使用随机分配控制混淆变量。相关研究揭示变量间关系但不表明因果关系。其他方法包括调查、自然观察和个案研究。
Statistics summarize data and support inferences. Descriptive statistics include measures of central tendency (mean, median, mode) and variability (range, standard deviation). Inferential statistics determine if results are statistically significant (p < 0.05). The APA ethical code demands informed consent, confidentiality, and protection from harm.
统计学用以汇总数据并支持推断。描述统计包括集中趋势指标（平均数、中位数、众数）和变异性指标（全距、标准差）。推断统计判断结果是否达到统计显著（p < 0.05）。APA 伦理准则要求知情同意、保密和避免伤害。
2. Biological Bases of Behavior | 行为的生物学基础
Neurons communicate via electrochemical signals. An action potential travels along the axon and triggers the release of neurotransmitters into the synapse. Key neurotransmitters include dopamine (reward, movement), serotonin (mood, sleep), acetylcholine (muscle action, memory), and GABA (inhibitory). Glutamate is the main excitatory neurotransmitter.
神经元通过电化学信号进行交流。动作电位沿轴突传导并触发神经递质释放到突触间隙。关键神经递质包括多巴胺（奖赏、运动）、血清素（情绪、睡眠）、乙酰胆碱（肌肉运动、记忆）和 GABA（抑制性）。谷氨酸是主要的兴奋性神经递质。
The nervous system comprises the central nervous system (brain, spinal cord) and the peripheral nervous system. The peripheral system includes the somatic (voluntary movement) and autonomic (involuntary) branches. The autonomic system further divides into sympathetic (fight-or-flight) and parasympathetic (rest-and-digest) systems.
神经系统由中枢神经系统（脑、脊髓）和外周神经系统组成。外周系统包括躯体神经（随意运动）和自主神经（非随意）。自主神经系统又分为交感神经（战斗或逃跑）和副交感神经（休息与消化）。
Major brain structures: the brainstem controls vital functions; the cerebellum coordinates balance; the limbic system (amygdala, hippocampus, hypothalamus) processes emotion and memory; and the cerebral cortex is divided into frontal, parietal, occipital, and temporal lobes. The endocrine system secretes hormones (e.g., adrenaline, cortisol) that influence arousal and stress.
主要脑结构：脑干控制生命基本功能；小脑协调平衡；边缘系统（杏仁核、海马、下丘脑）处理情绪与记忆；大脑皮层分为额叶、顶叶、枕叶和颞叶。内分泌系统分泌激素（如肾上腺素、皮质醇）影响唤醒和压力。
3. Sensation and Perception | 感觉与知觉
Sensation involves receptor detection of stimuli; perception is the brain’s interpretation. Absolute threshold is the minimum stimulus energy needed for detection 50% of the time. Signal detection theory highlights the roles of sensitivity, motivation, and expectations. Difference threshold (just noticeable difference) follows Weber’s law.
感觉是感受器对刺激的检测，知觉是脑对信息的解释。绝对阈限是 50% 概率被察觉到的最小刺激能。信号检测论强调感受性、动机和期待的作用。差别阈限（最小可觉差）遵从韦伯定律。
Vision: light is focused by the lens onto the retina, which contains rods (dim light) and cones (color, detail). The optic nerve sends signals to the visual cortex. Perceptual organization relies on figure-ground separation and Gestalt principles (proximity, similarity, continuity, closure). Depth perception uses binocular cues (retinal disparity) and monocular cues (relative size, linear perspective).
视觉：光经晶状体聚焦于视网膜，视网膜包含视杆细胞（微光）和视锥细胞（颜色、细节）。视神经将信号传至视觉皮层。知觉组织依赖图形-背景分离和格式塔原则（接近性、相似性、连续性、闭合性）。深度知觉运用双眼线索（双眼视差）和单眼线索（相对大小、线条透视）。
4. Learning | 学习
Classical conditioning (Pavlov) forms associations between stimuli. An unconditioned stimulus (US) triggers an unconditioned response (UR). After pairing a neutral stimulus with the US, the neutral stimulus becomes a conditioned stimulus (CS) that evokes a conditioned response (CR). Processes include acquisition, extinction, spontaneous recovery, generalization, and discrimination.
经典条件作用（巴甫洛夫）在刺激间建立联结。无条件刺激（US）引发无条件反应（UR）。中性刺激与 US 配对后成为条件刺激（CS），引发条件反应（CR）。过程包含习得、消退、自发恢复、泛化和分化。
Operant conditioning (Skinner) is learning through consequences. Reinforcement (positive or negative) strengthens behavior; punishment suppresses it. Reinforcement schedules (fixed-ratio, variable-ratio, fixed-interval, variable-interval) produce distinct response patterns. Observational learning (Bandura) occurs by watching models and involves attention, retention, reproduction, and motivation.
操作性条件作用（斯金纳）通过后果学习。强化（正强化或负强化）增加行为；惩罚抑制行为。强化程式（固定比率、可变比率、固定时距、可变时距）产生不同的反应模式。观察学习（班杜拉）通过观察榜样发生，涉及注意、保持、复现和动机。
5. Cognitive Psychology | 认知心理学
The information-processing model describes memory as encoding, storage, and retrieval. The Atkinson-Shiffrin model proposes sensory memory, short-term memory (working memory: limited to about 7±2 chunks, brief duration), and long-term memory. Long-term memory includes explicit (declarative: semantic, episodic) and implicit (procedural, priming) systems.
信息加工模型将记忆描述为编码、存储和提取。阿特金森-谢夫林模型提出感觉记忆、短时记忆（工作记忆，容量约 7±2 个组块，持续时间短）和长时记忆。长时记忆包括外显（陈述性：语义记忆、情景记忆）和内隐（程序性、启动）系统。
Forgetting can stem from encoding failure, storage decay, or retrieval failure. Proactive and retroactive interference can block recall. Problem-solving uses algorithms (step-by-step) and heuristics (mental shortcuts like availability and representativeness). Language acquisition follows milestones (babbling, one-word, two-word, telegraphic speech) and is supported by an innate language acquisition device (Chomsky).
遗忘可能源于编码失败、存储衰退或提取失败。前摄干扰和倒摄干扰会阻碍回忆。问题解决使用算法（逐步程序）和启发式（可得性启发、代表性启发等心理捷径）。语言习得遵循里程碑（咿呀语、单词句、双词句、电报句），并受到先天语言习得机制（乔姆斯基）的支持。
6. Developmental Psychology | 发展心理学
Piaget’s cognitive development stages: sensorimotor (birth to 2 years, object permanence), preoperational (2-7, egocentrism, animism, lack of conservation), concrete operational (7-11, logical thinking about concrete events, conservation), and formal operational (12+, abstract reasoning). Vygotsky stressed the role of culture and the zone of proximal development.
皮亚杰认知发展阶段：感知运动阶段（0-2 岁，客体永久性）、前运算阶段（2-7 岁，自我中心、泛灵论、缺乏守恒）、具体运算阶段（7-11 岁，对具体事件的逻辑思维，守恒）和形式运算阶段（12 岁以上，抽象推理）。维果茨基强调文化和最近发展区的作用。
Erikson proposed eight psychosocial stages, each with a central crisis. Key stages: trust vs. mistrust (infancy), identity vs. role confusion (adolescence), and intimacy vs. isolation (early adulthood). Attachment (Ainsworth) can be secure, insecure-avoidant, or insecure-ambivalent. Parenting styles (authoritative, authoritarian, permissive, uninvolved) impact social and emotional development.
埃里克森提出八个人生阶段，每个阶段都有核心危机。关键阶段：信任对不信任（婴儿期）、同一性对角色混乱（青春期）、亲密对孤独（成年早期）。依恋（安斯沃斯）可分为安全型、不安全-回避型和不安全-矛盾型。教养方式（权威型、专制型、放纵型、忽视型）影响社会性和情绪发展。
7. Motivation, Emotion, and Stress | 动机、情绪与压力
Motivation theories: drive-reduction (physiological needs create drives), arousal theory (seek optimal arousal), and Maslow’s hierarchy (physiological, safety, love/belonging, esteem, self-actualization). Hunger is regulated by the lateral and ventromedial hypothalamus, and is influenced by glucose levels, hormones, and cultural factors.
动机理论：驱力降低理论（生理需要产生驱力）、唤醒理论（寻求最佳唤醒）和马斯洛需要层次（生理、安全、爱与归属、尊重、自我实现）。饥饿受外侧下丘脑和腹内侧下丘脑调节，并受葡萄糖水平、激素和文化因素影响。
Emotion theories: James-Lange (arousal → emotion), Cannon-Bard (arousal + emotion simultaneously), Schachter-Singer two-factor (arousal + cognitive label), and Lazarus’s cognitive appraisal (appraisal → emotion). Stress triggers the general adaptation syndrome (alarm, resistance, exhaustion). Coping can be problem-focused (tackling the stressor) or emotion-focused (regulating emotions).
情绪理论：詹姆斯-兰格（唤醒→情绪）、坎农-巴德（唤醒与情绪同时）、沙赫特-辛格双因素（唤醒+认知标签）和拉扎勒斯认知评价（评价→情绪）。压力引发一般适应综合征（警觉期、抵抗期、衰竭期）。应对方式可以是问题聚焦（处理压力源）或情绪聚焦（调节情绪）。
8. Personality | 人格
Freud’s psychoanalytic theory describes personality as id, ego, and superego, driven by unconscious conflicts and psychosexual stages (oral, anal, phallic, latency, genital). Defense mechanisms such as repression, denial, and projection protect the ego from anxiety. Humanistic theorists (Rogers, Maslow) emphasize self-concept, unconditional positive regard, and self-actualization
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