The Psychology of Memory & Attention

Main ideas, concepts, and lessons

1) Two central themes in learning

• Tension/Attention: the mind’s process of selecting among sensory stimuli at any moment to decide what gets prioritized.
• Memory: the process of encoding, storing, and retrieving information (including factual knowledge, general knowledge, event experiences, and skills).

2) How memory works (4-step process)

1. Attention: filter what you experience in the world.
2. Encoding: process what attention brings into the mind.
3. Storage: what happens once information enters the brain.
4. Retrieval: recall of information/behaviors when needed.

3) Attention: what it is and what affects it

Attention is studied via how people process environmental information, using sensory neurons. It involves listening and concentrating on a specific object/topic/event to meet goals. It also includes “tuning out”—prioritizing relevant information while ignoring less relevant input.

External vs. internal focus of attention

• External focus: attention directed to where/what the action affects (the effect of the action).
• Internal focus: attention directed to the action itself (the performer’s movements/feelings).

What can undermine attention

• External factors: noise, too much movement.
• Internal factors: interest, motivation, mindset, attitude.

Four types of attention

• Orienting attention
  • Align attention with a sensory signal (e.g., eye movement or covertly).
  • Can be influenced by cues indicating where to attend in space.
• Divided attention
  • Ability to perform two or more tasks at the same time (multitasking).
  • Performance on at least one task often declines due to limited information-processing capacity.
  • Examples: driving while talking; eating while watching news.
• Selective attention
  • Focus on one object for a period while tuning out other details.
  • Example: ignoring surrounding sounds/distractions to finish homework.
  • Analogy: during a magic trick, focusing on the magician’s hands.
• Sustained attention
  • Ability to stay focused on an activity/stimulus over a long period, even with distractions.
  • Examples: air traffic controllers (life-or-death stakes if attention fails), surgeons, surveillance teams.
• Executive attention (additional functional category)
  • Helps regulate thoughts, emotions, and responses; manage distractions; solve problems; and switch between pieces of information.
  • Develops as children mature (frontal brain structures develop).
  • Frontal lobe damage can impair executive attention (thought/behavior/emotion regulation).
  • Stroop test example:
    • Task: concentrate on naming the color of words while ignoring the automatic reading tendency.
    • Note: frontal lobe activity inhibits the automatic reading response.

4) Information processing in the brain (how attention leads to encoding)

The brain actively organizes and connects new information to existing concepts.

Two processing types:

• Automatic processing
  • Encodes details such as time, space, frequency, and word meaning without conscious awareness.
  • Becomes automatic through repetition (e.g., learning a computer program until it feels “second nature”).
• Effortful processing
  • Requires attention and consciousness early on; later can shift into automaticity with practice.

Different encoding methods

• Semantic encoding
  • Encode meaning within a context (not just sensory input).
  • Example: understanding vocabulary in the context of the lesson rather than memorizing isolated definitions.
• Visual encoding
  • Encoding images/visual sensory information.
  • Amygdala role (medial temporal lobe):
    • Processes emotional reactions and contributes to visual encoding.
    • Associates positive/negative values of stimuli (e.g., love/fear examples).
• Acoustic encoding
  • Encoding sounds/auditory input for later storage and retrieval.
  • Example: easier recall of song lyrics when hearing the music.

Self-reference effect

Memory improves for information that directly relates to you. When attention encodes relevant details, personal relevance increases the chance of remembering.

5) How memories are stored (Atkinson–Shiffrin, “multi-store” model)

The model proposes three memory stores with linear transfer between them.

1. Sensory Memory (SM)
   • Stores brief sensory events (sights, sounds, tastes).
   • Lasts only a couple seconds.
   • Holds impressions of a large amount of information.
   • Example activity: close/open eyes briefly to experience residual visual image.
2. Short-term memory (STM) / Working memory
   • Temporary storage that processes incoming sensory information.
   • Duration: about ~20 seconds.
   • Capacity: ~5–9 items at a time.
   • Transfers to long-term memory for important information through:
     • Consolidation support using rehearsal (conscious repetition of important info).
3. Long-term memory (LTM)
   • Lasting retention of information and skills.
   • Can last from an hour to decades (theoretically unlimited capacity and indefinite duration).
   • Two components:

     • Explicit memory (conscious recall)

       • Semantic: facts/knowledge about words, concepts, language (e.g., meaning of “TikTok,” “McDonald’s,” Santa Claus concept).

       • Episodic: personal events (e.g., first day of school, what you wore). - Implicit memory (not consciously accessible)

       • Procedural: knowing how to do things (ride a bike, tie shoelaces).
       • Emotional conditioning: learned fears without conscious knowledge of why (e.g., fear of spiders).

6) Retrieval: getting information back out

Retrieval is bringing stored information back into awareness and is used for everyday functioning (e.g., getting to work, performing a job).

Three retrieval methods:

• Recall
  • Access information without cues/reminders.
  • Example: writing an essay when a professor asks for it with no prompts.
• Recognition
  • Identify information after encountering it again.
  • Example: multiple-choice questions where familiarity helps select the correct answer.
• Relearning
  • Brush up on a skill/concept to work with it again.
  • Example: reviewing before a midterm—prior learning makes it quicker.

Encoding specificity principle

Retrieval is more successful when conditions during retrieval match conditions during learning. Example: studying in a library improves remembering if the test is also in a library.

7) Brain structures, neurotransmitters, and emotion in memory

• Amygdala (limbic system)
  • Fear and emotional memories; can trigger stress/anxiety.
  • Example narrative: in a third grader whose parents are divorcing, fear shifts attention away from classroom learning, and emotional memory becomes more concrete long-term.
• Hippocampus (limbic system)
  • Associated with explicit memory, recognition, and spatial memory.
  • Projects information to cortex for meaning and links with other memories.
  • Damage prevents forming new memories (can’t properly transfer new information).
• Neurons & neurotransmitters
  • Strong emotional experiences can trigger neurotransmitter release, strengthening synaptic connections.
  • Neurotransmitters supporting consolidation mentioned:
    • epinephrine, dopamine, serotonin, glutamate, acetylcholine
• Arousal theory
  • Strong emotions → stronger memories; weak emotions → weaker memories.
  • Flashbulb memories: extremely clear recollections of vivid emotional events (e.g., recalling how blue the sky was during 9/11).

8) Forgetting: why memories fail

Forgetting can happen at any stage:

• Encoding failure
  • Memory is never stored (requires attention/effort to encode details).
  • Example: many people can’t identify which nickel is accurate because they don’t encode specific details.
• Amnesia
  • Loss of long-term memory due to disease/trauma.
  • Types:
    • Anterograde amnesia: inability to remember new information after trauma; hippocampus often affected.
    • Retrograde amnesia: loss of memories for events before trauma.
• Interference, retrieval cues, moods, motives
  • Some memories are retrievable under certain conditions and not others.

9) Memory construction and misinformation

• Construction: forming new memories.
• Reconstruction: bringing up memories and rebuilding them (memory is not perfect).
• Suggestibility
  • Misinformation from external sources can create false memories.
  • Eyewitness testimony: eyewitnesses are less reliable than once believed.
  • Reason for wrongful convictions cited: eyewitness misidentification (Innocence Project mentioned).
• Related topics:
  • Repressed memories: claims that traumatic childhood memories can be fully repressed.
  • Misinformation effect: questioning/suggestion leading to false memories.
  • False memory syndrome
    • False autobiographical memories of traumatic events the person strongly believes.
    • Often discussed in adult psychotherapy; emotionally vivid.

Methodology / instructions for enhancing memory (detailed bullet list)

The video concludes with practical strategies:

• Rehearsal
  • Conscious repetition of information you need to remember.
• Chunking
  • Organize information into manageable “chunks.”
  • Example: separating phone numbers into groups (area code / first three / last four).
• Elaborative rehearsal
  • Think about the meaning of new information and how it relates to what you already know.
• Mnemonic devices
  • Memory aids that help organize information for encoding.
  • Example: “knuckle calendar”
    • Knuckle bump = 31 days
    • Knuckle gaps = 30 days (with exceptions for January and February)

Speakers / sources featured

• Torres (lecturer; stated as “my name is torres” / “stats with torres”)
• Music (background cues; no specific creator identified)
• Google Slides / “psyc101 kivocab” Google Doc (linked course materials mentioned by the lecturer)
• Innocence Project (cited regarding eyewitness misidentification and wrongful convictions)