Psychology 1010: Consciousness, Learning, Memory, and Thought & Language Study Notes

Consciousness and Sleep

Sleep Paralysis

Sleep paralysis is a phenomenon that occurs when a person is either falling asleep or waking up and is temporarily unable to move or speak. It is often associated with REM (Rapid Eye Movement) sleep.

• Symptoms: Inability to move, sense of pressure, hallucinations.

• Causes: Disruption in the transition between sleep stages, especially REM sleep.

• Associated Disorders: Narcolepsy, sleep deprivation, irregular sleep schedules.

• Examples: Sleep paralysis can be triggered by stress, sleep deprivation, or irregular sleep patterns.

Consciousness

Consciousness refers to our awareness of thoughts, feelings, and environment. It includes both wakeful awareness and altered states such as sleep, hypnosis, and drug-induced states.

• Key Aspects: Self-awareness, sensory awareness, and state of consciousness.

• Applications: Understanding consciousness is essential for studying sleep, hypnosis, and the effects of psychoactive drugs.

Circadian Rhythms

Circadian rhythms are biological cycles that repeat approximately every 24 hours, regulating sleep, hormone release, and other bodily functions.

• Controlled by: The suprachiasmatic nucleus (SCN) in the hypothalamus.

• Disruptions: Jet lag, shift work, and irregular sleep patterns can disrupt circadian rhythms.

Why Do We Sleep?

• Restorative Theory: Sleep repairs the brain and body, consolidates memories, and supports immune function.

• Adaptive Theory: Sleep evolved to keep organisms safe during periods of vulnerability.

Stages of Sleep

Sleep is divided into several stages, including non-REM (NREM) and REM sleep.

• Stage 1: Light sleep, easily awakened, muscle activity slows.

• Stage 2: Eye movement stops, brain waves slow, sleep spindles appear.

• Stages 3 & 4 (Deep Sleep): Delta waves, difficult to awaken, restorative processes occur.

• REM Sleep: Rapid eye movement, vivid dreams, body is paralyzed except for eye muscles.

Sleep Disorders

• Insomnia: Difficulty falling or staying asleep.

• Sleep Apnea: Breathing stops during sleep, leading to frequent awakenings.

• Narcolepsy: Sudden sleep attacks, often with cataplexy (loss of muscle tone).

• REM Behavior Disorder: Acting out dreams due to lack of muscle paralysis during REM sleep.

Learning

What is Learning?

Learning is a relatively permanent change in behavior or knowledge that results from experience.

• Types: Classical conditioning, operant conditioning, observational learning.

Classical Conditioning

Classical conditioning is a learning process in which a neutral stimulus becomes associated with a meaningful stimulus and acquires the capacity to elicit a similar response.

• Key Terms:

  • Unconditioned Stimulus (UCS): Naturally elicits a response (e.g., food).

  • Unconditioned Response (UCR): Natural reaction to UCS (e.g., salivation).

  • Conditioned Stimulus (CS): Previously neutral, now elicits response after association (e.g., bell).

  • Conditioned Response (CR): Learned response to CS (e.g., salivation to bell).

• Processes: Acquisition, extinction, spontaneous recovery, generalization, discrimination.

Operant Conditioning

Operant conditioning involves learning through consequences, where behaviors are strengthened or weakened by reinforcement or punishment.

• Reinforcement: Increases likelihood of behavior.

• Punishment: Decreases likelihood of behavior.

• Schedules of Reinforcement:

  • Fixed Ratio: Reinforcement after a set number of responses.

  • Variable Ratio: Reinforcement after a variable number of responses (e.g., gambling).

  • Fixed Interval: Reinforcement after a set time period.

  • Variable Interval: Reinforcement after varying time intervals.

Observational Learning

Observational learning occurs when individuals learn by watching the behavior of others and the consequences of those behaviors.

• Key Research: Bandura's Bobo doll experiment demonstrated that children imitate aggressive behavior observed in adults.

Memory

Three-Stage Model of Memory

Memory is often conceptualized as a process involving three stages: sensory memory, short-term memory (STM), and long-term memory (LTM).

• Sensory Memory: Brief storage of sensory information (sights, sounds, tastes).

• Short-Term Memory: Holds information temporarily for analysis and retrieves information from LTM. Duration is about 20 seconds unless rehearsed.

• Long-Term Memory: Relatively permanent storage of information.

Working Memory

Working memory is a system for temporarily holding and manipulating information needed for cognitive tasks.

• Components: Central executive, phonological loop, visuospatial sketchpad.

Types of Long-Term Memory

• Declarative (Explicit) Memory: Facts and events (e.g., remembering a birthday).

• Non-Declarative (Implicit) Memory: Skills and procedures (e.g., riding a bike).

Serial Position Effect

• Primacy Effect: Better recall for items at the beginning of a list.

• Recency Effect: Better recall for items at the end of a list.

Case Study: H.M.

H.M. (Henry Molaison) had his hippocampus removed to treat epilepsy, resulting in severe anterograde amnesia (inability to form new long-term memories) but preserved short-term memory and procedural memory.

Thought and Language

Language

Language is a system of communication that uses symbols (such as words) to convey meaning according to rules of grammar.

• Phonemes: Smallest units of sound in a language.

• Morphemes: Smallest units of meaning (e.g., "un-", "-ed").

• Syntax: Rules for combining words into sentences.

• Semantics: Meaning of words and sentences.

Language Development

• Babbling: Early stage of language development involving repetition of sounds.

• Critical Period: Optimal window for language acquisition; after this period, language learning becomes more difficult.

• Bilingualism: Learning two languages early in life is associated with cognitive benefits.

Thinking and Reasoning

Thinking involves manipulating information mentally by forming concepts, solving problems, making decisions, and reflecting critically or creatively.

• Concepts: Mental groupings of similar objects, events, or people.

• Prototypes: Best example of a category.

Problem Solving and Decision Making

• Algorithms: Step-by-step procedures that guarantee a solution.

• Heuristics: Mental shortcuts that allow quick judgments but can lead to errors.

• Common Heuristics: Availability, representativeness, anchoring, and framing.

Biases in Thinking

• Confirmation Bias: Tendency to search for information that confirms one's beliefs.

• Hindsight Bias: Belief, after learning an outcome, that one would have foreseen it.

• Framing Effect: Decisions are influenced by how information is presented.

Examples and Applications

• Anchoring Heuristic: Relying on the first piece of information encountered when making decisions (e.g., initial price in negotiations).

• Availability Heuristic: Estimating the likelihood of events based on their availability in memory (e.g., fearing plane crashes after hearing about one in the news).

Table: Schedules of Reinforcement

Schedule	Description	Example
Fixed Ratio	Reinforcement after a set number of responses	Factory worker paid after every 10 items produced
Variable Ratio	Reinforcement after a variable number of responses	Slot machine pays out after an unpredictable number of plays
Fixed Interval	Reinforcement after a set period of time	Weekly paycheck
Variable Interval	Reinforcement after varying time intervals	Checking for a text message response

Additional info:

• Some explanations and examples have been expanded for clarity and completeness.

• Key terms and processes have been defined and organized for exam preparation.