Comprehensive Study Notes: Memory, Cognition, Development, Motivation, and Sexuality in Psychology

Chapter 6: Memory

Definition and Processes of Memory

Memory is an active system that receives information from the senses, organizes and stores it, and retrieves that information when needed. It is essential for learning, adaptation, and daily functioning.

• Encoding: The process of converting sensory input into a form that can be stored in memory.

• Storage: The retention of encoded information over time.

• Retrieval: The process of accessing stored information when it is needed.

Stages of Memory

• Sensory Memory: The first stage of memory, where information enters the nervous system through the senses.

  • Iconic Memory: Visual sensory memory lasting only a fraction of a second.

  • Echoic Memory: Auditory sensory memory lasting a few seconds.

• Short-Term Memory (STM): The memory system where information is held briefly while being used.

  • Maintenance Rehearsal: Repeating information to maintain it in STM longer.

  • Chunking: Combining individual bits of information into larger, meaningful units (chunks) to increase STM capacity.

• Long-Term Memory (LTM): The system where information is stored on a relatively permanent basis.

  • Elaborative Rehearsal: Transferring information from STM to LTM by making it meaningful.

Serial Position Effects

• Primacy Effect: Tendency to remember information at the beginning of a list better than what follows.

• Recency Effect: Tendency to remember information at the end of a list better than earlier items.

Reliability of Memory Retrieval

• Constructive Processing: Memory retrieval is reconstructive; memories can be influenced by new information or beliefs, affecting eyewitness testimony.

Forgetting

• Encoding Failure: Failure to encode information due to lack of attention or rehearsal.

• Retrieval Failure: Inability to recall stored information, at least temporarily.

Interference Theory

• Proactive Interference: Old information interferes with the recall of new information.

• Retroactive Interference: New information interferes with the recall of old information.

Types of Amnesia

• Retrograde Amnesia: Loss of memory for events before an injury or trauma.

• Anterograde Amnesia: Inability to form new memories after an injury or trauma.

Types of Long-Term Memory

• Procedural Memory: Skills and activities one knows how to perform physically ("muscle memory").

• Episodic Memory: Personal events, activities, and experiences that are visual and autobiographical in nature.

Memory and the Brain

• Hippocampus: Responsible for the formation of new declarative long-term memories and conversion from STM to LTM.

• Cerebellum: Stores procedural memories.

• Amygdala: Stores memories of fear.

Memory Retrieval

• Retrieval Cue: Any stimulus that helps retrieve a memory from storage.

• Recognition: Matching a stimulus to previously stored information.

• Recall: Retrieving information from memory with little or no external cues.

Chapter 7: Cognition

Thinking and Mental Representation

Cognition refers to the mental activities involved in organizing, understanding, and communicating information.

• Mental Images: Picture-like representations of objects, people, or events based on experience.

• Concepts: Ideas that represent a class or category of objects, events, or people.

  • Superordinate: The most general form (e.g., animal, fruit).

  • Basic Level: A more specific example within a superordinate concept (e.g., dog, apple).

  • Subordinate: The most specific example (e.g., pug, red apple).

Problem-Solving

• Trial and Error: Trying different solutions until one works.

• Algorithms: Step-by-step procedures for solving certain types of problems (e.g., math formulas).

• Heuristics: Mental shortcuts or "rules of thumb" based on experience; quick but not always accurate.

• Insight: Sudden realization of a problem's solution, not achieved through trial and error alone.

Barriers to Problem-Solving

• Functional Fixedness: Tendency to think of objects only in terms of their typical uses.

• Mental Set: Tendency to use problem-solving strategies that have worked in the past.

Intelligence

• Intelligence: The ability to learn from experience, acquire knowledge, and use resources effectively in new situations.

• Sternberg's Triarchic Theory:

  • Analytical Intelligence: Ability to break problems into parts for analysis ("book smarts").

  • Practical Intelligence: Ability to adapt to real-world demands ("street smarts").

  • Creative Intelligence: Ability to deal with new concepts and come up with novel solutions (divergent thinking).

Development and Assessment of Intelligence

• Standardization: Giving the same test to representative samples for assessment and comparison.

• Validity: The degree to which a test measures what it is intended to measure.

• Reliability: The degree to which a test yields consistent results over time.

• IQ (Intelligence Quotient): Calculated as:

$IQ = \frac{\text{Mental Age}}{\text{Chronological Age}} \times 100$

• Stanford-Binet IQ Test: Measures intelligence using the IQ formula above.

• Wechsler IQ Tests (WAIS/WISC): Widely used intelligence tests for adults and children.

Special Populations

• Gifted: Individuals with an IQ of 130 or higher (top 2-3% of the population).

• Intellectual Disability: Individuals with cognitive, social, and behavioral skills significantly below average (IQ at or below 70).

Chapter 8: Development Across the Lifespan

Nature vs. Nurture

• Nature: Genetics, heredity, and biology.

• Nurture: Environment, socialization, and experience.

• Most human development is influenced by both nature and nurture.

Research Designs in Developmental Psychology

• Cross-Sectional: Studying different age groups at the same time for comparison.

• Longitudinal: Studying the same group over many years to assess changes as they age.

Prenatal Development

• Germinal Period: First 2 weeks after conception; zygote moves to the uterus.

• Embryonic Period: 2 to 8 weeks after conception; major organs and structures begin to develop (critical period).

• Fetal Period: 8 weeks after conception until birth; growth and functional development of organs.

Conception and Twins

• Monozygotic Twins: Identical twins formed from one zygote splitting into two embryos (same DNA).

• Dizygotic Twins: Fraternal twins formed from two separate eggs fertilized by two sperm (genetically similar as siblings).

Temperament

• Temperament: Behavioral and emotional characteristics established at birth.

• Easy: Regular patterns, adaptable, mellow, easy to soothe.

• Difficult: Irregular patterns, not adaptable, irritable, hard to soothe.

• Slow to Warm Up: Less erratic, slow to adjust to change, eventually adapt.

Attachment

• Attachment: Emotional bond between infant and primary caregiver.

• Ainsworth's "Strange Situation" Study: Assessed attachment styles:

  • Secure: Willing to explore, upset when caregiver leaves, easily soothed upon return.

  • Avoidant: Insecure, indifferent to caregiver's presence, avoids social contact.

  • Ambivalent: Insecure, clingy, upset when caregiver leaves, hard to soothe upon return.

Parenting Styles

• Authoritarian: Strict, controlling, little warmth or affection.

• Permissive-Neglectful: Uninvolved, emotionally detached.

• Permissive-Indulgent: Overly involved, few boundaries or rules.

• Authoritative: Clear limits, warmth, affection, and support (best outcomes).

Piaget's Theory of Cognitive Development

• Sensorimotor Stage (Birth–2 years): Uses senses and motor skills to interact with the environment.

• Schema: Mental concept formed through experience.

• Object Permanence: Understanding that objects exist even when not seen.

• Preoperational Stage (2–7 years): Uses language, cannot reason logically.

• Centration: Focuses on one aspect of a situation.

• Irreversibility: Inability to mentally reverse actions.

• Concrete Operations (7–12 years): Logical, rational thought, but not abstract thinking.

Stages of Dying and Grief (Kübler-Ross Model)

Stage	Description
1. Denial	Refusal to accept reality of loss
2. Anger	Feelings of frustration and helplessness
3. Bargaining	Attempting to negotiate for more time or a way out
4. Depression	Deep sadness over the loss
5. Acceptance	Coming to terms with the loss

Chapter 9: Motivation and Emotion

Motivation

• Motivation: The process by which activities are started, directed, and continued to meet physical or psychological needs.

• Extrinsic Motivation: Performing an action for external rewards (e.g., money, food).

• Intrinsic Motivation: Performing an action because it is inherently rewarding or satisfying.

Drive Reduction Theory

• Need: A physical requirement essential for survival (e.g., food, water).

• Drive: Psychological tension and arousal resulting from a need, motivating behavior to satisfy the need.

Obesity

• Obesity: Condition where body weight is 20% or more over the ideal weight for one's height.

Psychological Needs

• Need for Achievement: Desire to succeed and accomplish goals.

• Need for Affiliation: Desire for friendly social interactions and relationships.

• Need for Power: Desire to have control, status, or influence over others.

Maslow's Hierarchy of Needs

• Self-Actualization: Achieving one's full potential; may occur temporarily during "peak experiences."

Emotion

• Emotion: The feeling aspect of consciousness, involving physiological arousal, subjective experience, and behavioral expression.

• Three Elements of Emotion:

  • Physiological (biological arousal)

  • Subjective (cognitive) experience

  • Behavioral (outward) expression

• Display Rules: Learned ways of controlling emotional expression in social or cultural settings.

Chapter 10: Sexuality and Gender

Sex and Gender

• Sex: Physical aspects of being male or female (primary and secondary sex traits).

• Gender: Psychological aspects of being male or female, including roles and identity.

• Gender Roles: Societal expectations for masculine or feminine behavior.

• Gender Stereotype: Oversimplified beliefs about males or females based solely on sex.

• Androgyny: Possessing positive personality traits of both genders, regardless of biological sex.

Sexual Orientation

• Sexual Orientation: Romantic or sexual attraction to members of a particular sex.

• Heterosexual: Attracted to the opposite sex.

• Homosexual: Attracted to the same sex.

• Bisexual: Attracted to both males and females.

Kinsey Sex Studies

• First large-scale survey of sexual behavior in the U.S. (late 1930s–1950s).

• Used face-to-face interviews; criticized for non-representative samples.

Masters and Johnson

• First direct observational study of human sexual behavior in a laboratory (1950s–1960s).

• Measured physiological responses during sexual activity.

• Publication delayed due to societal concerns.

Human Sexual Response Cycle

Phase	Description
Excitement	Increased heart rate, respiration, blood pressure, and genital blood flow.
Plateau	Physical changes continue and stabilize.
Orgasm	Rhythmic muscular contractions, intense pleasure, release of semen in males.
Resolution	Body returns to normal state; physiological changes decrease.

Sexually Transmitted Infections (STIs)

• Common Bacterial STIs: Chlamydia, syphilis, gonorrhea (treatable with antibiotics).

• Common Viral STIs: Herpes, genital warts (HPV), AIDS (HIV) (not curable, may lead to other health issues).

• Transmission: Bodily fluids or sexual contact.

• Prevention: Use protection, abstain from sex, avoid IV drug use, know symptoms, have one partner, get regular physicals.

Sexual Dysfunction

• Sexual Dysfunction: Problems with sexual functioning or performance due to social, cultural, physical, or psychological factors.

Additional info: Some explanations and definitions have been expanded for clarity and completeness based on standard academic psychology sources.