Psychology Lecture Notes: Memory, Amnesia, Biopsychology, and Study Strategies

Feedback on Psych Methods and Final Exam Prep

• Instructor praised the depth of analysis and engagement, noting strong ideas and solid understanding of psychology concepts.
• Encouragement to review personal feedback, then email, visit office hours, or schedule a meeting to discuss results and next steps.
• If students are excited about pursuing their own studies, we can discuss a game plan for doing that during their time at Spring Hill College.
• Feedback is being highlighted because it may be used on the final exam to assess understanding of psych methods.
• Core skills to review for the final exam:
  • Identify what a hypothesis would be.
  • Pros and cons of experimental vs non-experimental studies.
  • Pros and cons of convenient sampling vs random sampling.
• Plan to revisit these research concepts as we approach the end of the semester to reinforce understanding.

Reflection, Quizzes, and Memory Reflection

• Reminder that another reflection is due tonight: a memory reflection.
• Reflection type varies: some ask you to develop a research proposal; others emphasize applying concepts to yourself.
• This reflection is a self-reflection task focused on deeply encoding information and applying concepts.
• Task:
  • Reflect on which information-processing technique (e.g., elaborative encoding, self-testing, spacing, etc.) would be most effective for you, and why.
  • Reflect on which technique would be least effective for you, and why.
  • Post your reflection on Canvas.
• BioSite quiz: next Tuesday; it’s a home-based quiz with about $10$ multiple-choice questions and estimated time $15\text{ to }20\,\text{minutes}$.
• Each chapter includes a reflection assignment or a quiz; this BioSite quiz is a review tool rather than in-class reading quizzes.
• The memory reflection asks you to identify one deep technique (e.g., making material personally relevant) and explain its usefulness for you; also identify a technique you think is less useful (e.g., strict hierarchies) and explain its limitations.
• The goal is to engage the material on a personal level and differentiate between concepts.
• Quiz due next Tuesday night; by then we will have covered all BioSite content.

Exam Prep and Study Logistics

• The upcoming BioSite quiz is intended as at-home work; the course uses in-class reading quizzes for quick checks, while BioSite quizzes review the material at home.
• Question format for the exam is mostly multiple-choice with applied/scenario-based items.
• Example concept to anticipate on the exam: encoding, storing, or retrieving (retrieval) – e.g., choosing the correct process for a given scenario (e.g., encoding, retrieving, or storage).
• There is no standalone study list, but slides for Chapter 1 and Chapter 8 are posted, and Chapter 12 slides will be posted after Chapter 2 coverage; these serve as study guides.
• The instructor emphasizes focusing on material covered in class rather than trying to memorize everything in the textbook.
• Advice on study strategy: create and swap practice questions with a study buddy; answering and then grading each other’s questions can simulate the professor’s mindset and improve anticipation of exam questions.
• Time management tip: a student should aim for about 30 minutes for the memory reflection and stop if it’s taking too long; “good enough” can be sufficient.
• Sleep and rest are emphasized for memory consolidation; after studying, sleep helps memory retention.
• The exam will be held in class next Thursday and students will have the full class period to complete it.
• Session highlights: practice-based, scenario-oriented questions; not purely definitional.

Memory: Retrieval and Serial Position Effect

• Retrieval: Getting information back out of memory.
• Serial Position Effect: order of information affects recall; two main effects:
  • Primacy effect: items presented first are remembered better for long-term recall.
  • Recency effect: items presented last are remembered better for immediate recall.
• Example (groceries): If asked to recall a list after a delay, the first items tend to be remembered best for long-term recall, while the last items are recalled best immediately.
• Experimental data (12-item list): recall measured for immediate recall (red line) shows both primacy and recency; delayed recall typically shows primacy more than recency.
• Practical takeaway: alter study order to exploit primacy across study sessions; schedule breaks and sleep to consolidate memories.
• Context-dependent memory: mentioned but not elaborated here; will be revisited later.
• Study strategy suggestion: vary the order in which you study different topics (e.g., start with research, then memory, then BioPsych on one day; rotate order on subsequent days) to reinforce primacy effects across topics.

Amnesia and Forgetting: Types and Implications

• Amnesia types:
  • Anterograde amnesia: cannot form new memories from the point of injury forward.
  • Retrograde amnesia: loss of past memories prior to the injury.
• Pure forms are rare; many cases involve a mix of anterograde and retrograde components.
• Example case discussions:
  • Lucy from Fifty First Dates: anterograde amnesia-like condition with daily reset.
  • Jimmy (case study): unable to form new explicit memories (episodic) but retains procedural memory and can learn through repetition; emotional conditioning preserved.
• Key distinctions:
  • Explicit memory vs procedural memory differences; explicit memories (episodic, semantic) are often impaired in anterograde amnesia, while procedural memory can remain intact.
  • Dementia/Alzheimer’s: memory loss tends to be diffuse and includes both anterograde and retrograde components; deterioration is more extensive and progressive.
• Brain regions: hippocampus is critical for encoding new explicit memories; procedural memory relies on other brain regions and networks.
• Role of neuropsychologists: assessment before/after interventions (e.g., pre-surgery baseline memory and post-surgery outcomes); use of neuroimaging and cognitive tests.
• Connection to clinical situations: trauma (e.g., car accidents) can cause memory impairments; clinicians differentiate memory disorders from dissociative processes for targeted treatment.
• Everyday memory context:
  • Amnesia can be episodic; memory of personal events can be impaired, while skills and conditioned responses may persist.
  • Memory disorders have practical implications for identity, safety, and independence.

Everyday Forgetting: Encoding, Storage, and Retrieval Failures

• Forgetting mechanisms:
  • Encoding failure: information never fully enters long-term memory; distractions reduce encoding quality.
  • Storage decay: memory trace weakens over time; rapid early forgetting that slows later on.
  • Retrieval failure: information is stored but cannot be accessed at the moment; tip-of-the-tongue phenomena are common.
• Real-world example: US flag encoding vs recognition; familiarity does not guarantee encoding; exposure alone may not yield retrievable memory without proper encoding.
• Interference in forgetting:
  • Proactive interference: older information disrupts learning of newer information (forward-acting).
  • Retroactive interference: newer information disrupts recall of older information (backward-acting).
• Everyday scenario example: password management (old vs new passwords) illustrates proactive and retroactive interference in real life.
• Reducing interference:
  • Study before sleep to maximize memory consolidation (sleep after studying reduces interference from waking activities).
  • Spacing out study and varying topics reduces interference across materials.
• Additional factors:
  • Psychological factors (depression, anxiety) can affect attention and encoding; dissociative or substance-related issues can also impact memory.
  • Medications can improve focus and reduce distractions, but natural strategies like adequate sleep and exercise are highly beneficial.
• Practical note: when addressing memory issues in students, consider encoding quality, storage, and retrieval processes and how daily habits influence each stage.

Biopsychology: Neurons, Signals, and Communication

• What is psychobiology? The link between biology and behavior; involves neuroscience and behavioral genetics; important for understanding how medications work and how brain regions relate to behavior.
• Neurons as building blocks:
  • Dendrites: receive messages from other neurons (message receivers).
  • Soma (cell body) and nucleus: contain genetic material (chromosomes) but not the focus here.
  • Axon: message sender; conducts electrical signals down its length.
  • Myelin sheath: insulation around some axons that speeds signal transmission; speeds up communication and protects the axon.
  • Multiple sclerosis (MS): demyelination slows communication, leading to muscle weakness, impaired vision, speech problems.
• Glial cells: make up about $90\%$ of brain cells; neurons are the remaining $10\%$; glia provide nutrients, support, and contribute to myelination.
• Brain development and maturation:
  • Myelination continues into about age $25$; neural efficiency improves with age.
  • Frontal lobes (planning, judgment) continue to mature until around 25$-26; explains ongoing development of decision-making abilities.
  • Potential sex differences in maturation rates may exist; research ongoing; not fully settled.
• Action potentials (the electrical signal within a single neuron):
  • Resting potential: inside is more negative than outside; outside is relatively positive.
  • Depolarization: when ion channels open and positive ions flow in, the inside becomes more positive, triggering a domino-like signal down the axon.
  • Threshold: a minimum signal strength needed to fire an action potential; if below threshold, no firing occurs (all-or-none principle).
  • The amplitude of an action potential is constant; stronger stimuli do not produce a bigger spike in a single neuron; they may recruit more neurons.
  • Refractory period: after firing, a rest period where the neuron resets (repolarizes) and cannot fire again immediately.
• Synapses and neurotransmission:
  • Neurons do not physically touch; there is a gap called the synaptic gap or synapse between neurons.
  • Presynaptic neuron releases neurotransmitters into the synapse via vesicles; neurotransmitters travel across the gap and bind to receptors on the postsynaptic neuron (lock-and-key mechanism).
  • Neurotransmitters can be mimicked by substances (agonists) or blocked by substances (antagonists).
  • Psychoactive substances affect mental processes by acting on neurotransmitter systems: they can mimic neurotransmitters or block their receptors.
  • Example: caffeine acts as a psychoactive stimulant; some drugs mimic serotonin or other neurotransmitters, affecting mood and alertness.
• Implications for behavior and treatment:
  • The way substances interact with receptors helps explain mood changes, cravings, and addictive processes.
  • Understanding neurotransmitter dynamics informs treatment approaches for mental health and neurological disorders.
• Practical notes for students:
  • The lecturer emphasizes not needing to memorize exact ions/transporters for intro psych; focus on broad concepts of neurotransmitter action, receptors, and the general biology of neurons.
  • Slides and future classes will cover specific neurotransmitters and their roles in mood, memory, attention, and other functions.
• Brain organization and coordination:
  • The left and right hemispheres can have different specializations; the course will discuss how communication between hemispheres influences behavior and cognitive functions.
• Imaging and measurement:
  • If you ever need brain imaging (MRI or CT), you’ll learn what the results mean, benefits, and limitations, as well as how to relate imaging to brain regions and functions.
• Career paths:
  • Neuropsychology is a potential career: clinical neuropsychologists assess cognitive function, memory, attention, and personality; they use neuroimaging and cognitive tests to diagnose and plan interventions, especially around brain injuries or surgery.
• Summary reminder for exams:
  • The course will eventually delve into a detailed discussion of neurotransmitters; this section provides the foundational language for understanding psychoactive substances and brain-behavior relationships.
• Closing note on class dynamics:
  • The instructor acknowledges the challenging terminology in this section and plans hands-on exploration of brain areas in upcoming classes to build familiarity through practice.

ext{Key numerical notes and timings mentioned in class:}

• Sleep recommended: 7\text{ to }9\,\text{hours} per night for memory consolidation.
• BioSite quiz length: about 10$questions, expected to take$15\text{ to }20\,\text{minutes}.
• Timeframe reference for maturation and development: myelin development until about 25$; frontal lobe maturation until about$25$-$26.
• Proportion of brain cells: neurons \approx 10\%$; glial cells$\approx 90\%$$.
• Frequency of study changes: vary study order across days to exploit primacy and prevent interference.