Ap Psychology

AP Psychology — Memory (FULL EXPLANATIONS + EXAMPLES)

Q1: Brain area damaged in amnesia

Correct: a) Hippocampus

✅ Why it’s correct

The hippocampus, a limbic system structure located in the medial temporal lobe, is critically responsible for the formation and consolidation of new explicit memories (declarative memories, such as facts and events). When this area is damaged, individuals often experience anterograde amnesia, meaning they have severe difficulty creating or retaining new memories after the damage occurred.

Example:
A patient with hippocampal damage might meet a nurse every day for weeks but, each time, believes it’s the first time they’ve met, unable to form new recollections of their interactions.

❌ Other choices

b) Medulla

Controls vital autonomic functions like breathing, heart rate, and blood pressure. It is located in the brainstem and is not directly involved in memory formation.

Example: Damage causes life-threatening breathing or heart problems, not memory loss.

c) Hypothalamus

Regulates essential bodily functions such as hunger, thirst, sleep, body temperature, and hormone release through its connection to the pituitary gland. While it influences states like arousal that can indirectly affect memory, it is not a primary memory structure.

Example: Damage may cause drastic changes in appetite (overeating or loss of hunger), unmanaged thirst, or hormone imbalance.

d) Cerebellum

Primarily controls balance, coordination of voluntary movements, and is crucial for forming and storing procedural memories (implicit memories of how to do things).

Example: Damage causes motor difficulties, clumsiness, and impaired ability to learn new motor skills, but not the forgetting of names or factual information.

Q2: Cannot remember anything before age 3

Correct: b) Infantile amnesia

✅ Why it’s correct

Infantile amnesia, also known as childhood amnesia, refers to the common and normal inability of adults to recall episodic memories (specific personal events) from early childhood (typically before the age of 3-4). This phenomenon is believed to be due to an immature hippocampus and other brain regions involved in memory formation, as well as undeveloped language skills and a nascent sense of self, which are essential for encoding and organizing personal experiences.

Example:
Even with a perfect memory, you typically don’t remember the precise moment you learned to walk, your first birthday party, or early conversations.

❌ Other choices

a) Anterograde amnesia

An inability to form new memories after an event causing brain damage (often to the hippocampus). Existing memories from before the event usually remain intact.

Example: Forgetting today’s lesson immediately after hearing it due to a recent head injury.

c) Retrograde amnesia

Loss of past memories, often extending back in time before an injury or traumatic event. The severity can vary, from losing a few years to an entire lifetime of memories, though remote memories are usually more resistant to loss.

Example: After a severe car accident, a patient might forget their entire childhood or who their family members are.

d) Proactive interference

Occurs when old information interferes with the retrieval or learning of new information. It pertains to how learning new information is hindered by previously learned material.

Example: Having trouble remembering a new phone number because your old phone number keeps coming to mind and getting in the way.

Q3: Repeating a name

Correct: b) Maintenance rehearsal

✅ Why it’s correct

Maintenance rehearsal is a shallow processing technique that involves the straightforward repetition of information in order to keep it in short-term memory (or working memory) for a limited duration. While it can maintain information in conscious awareness, it is generally ineffective for transferring information into long-term memory for permanent storage, as it doesn't involve deeper processing or meaning-making.

Example: Repeating “Alex, Alex, Alex” to yourself several times until you are introduced to Alex, holding the name in your working memory.

❌ Other choices

a) Mnemonic device

Memory aids or strategies (like acronyms, acrostics, method of loci, or visual imagery) that help organize, encode, and retrieve information more effectively by linking it to existing knowledge or creative associations. They facilitate deeper encoding.

Example: Using the acronym HOMES to remember the names of the Great Lakes (Huron, Ontario, Michigan, Erie, Superior).

c) Distributed learning

A study strategy involving spacing out learning sessions over time rather than attempting to learn all information in a single, intense session (cramming). This strategy, based on the spacing effect, is highly effective for long-term retention and recall.

Example: Studying a psychology chapter for 20 minutes each day over a week leading up to a test, rather than a single 2-hour session the night before.

d) Elaborative rehearsal

A deep processing strategy that involves actively thinking about the meaning of new information and connecting it to existing knowledge or making it personally relevant. This method is far more effective than maintenance rehearsal for transferring information into long-term memory.

Example: When learning the name “Alex,” you might link it to an existing friend named Alex, or imagine Alex as an electrician (A-LEC-trician) to create a meaningful association.

Q4: When rehearsal is prevented

Correct: c) No transfer to long-term memory

✅ Why it’s correct

According to the Information Processing Model of memory, information typically flows from sensory memory to short-term memory (STM) and then, through rehearsal, to long-term memory (LTM). If rehearsal, particularly elaborative rehearsal, is prevented or interrupted, the information in short-term memory will quickly decay (typically within 18-30 seconds if not actively refreshed) and will never be encoded or consolidated into long-term storage.

Example: You hear a phone number once, are immediately distracted before you can repeat it, and consequently forget it entirely, preventing its transfer to long-term memory.

❌ Other choices

a) STM does not last forever

While true that short-term memory has a limited duration and decays quickly without rehearsal, this choice describes a property of STM, not the direct consequence of preventing rehearsal on LTM transfer.

Example: Without consciously repeating a new name, you likely forget it within 30 seconds.

b) Sensory memory still works

Sensory memory operates automatically and briefly holds sensory information (e.g., visual icon, auditory echo) for a fraction of a second to a few seconds. Preventing rehearsal affects the next stage of memory (STM to LTM), not the initial sensory intake.

Example: You briefly see a word or hear a sound, even if immediately distracted, but this extremely fleeting trace is prior to active rehearsal.

d) Retrieval becomes harder, not easier

If information is not properly encoded into long-term memory due to lack of rehearsal, it cannot be retrieved. Therefore, retrieval doesn't just become harder; it becomes impossible because the memory was never stored in the first place.

Example: Poor initial encoding (e.g., passively reading without engaging with material) equals poor or impossible recall later, not easier retrieval.

Q5: Cannot remember new info after stroke

Correct: b) Anterograde amnesia

✅ Why it’s correct

Anterograde amnesia is a specific type of memory loss characterized by the inability to form new memories after an injury or illness that affects the brain (such as a stroke, trauma, or disease). This typically results from damage to the hippocampus or related structures in the medial temporal lobe, which are crucial for memory consolidation.

Example: A stroke patient might clearly remember all details of their life up until the day of their stroke but be completely unable to recall what they had for breakfast that morning or the name of a new doctor they met an hour ago.

❌ Other choices

a) Dissociative amnesia

A psychologically caused memory disorder, often triggered by severe stress or trauma, where an individual forgets important personal information, often their identity or specific traumatic events. It is not caused by brain damage.

Example: Forgetting one’s identity or an intensely traumatic event, without any apparent brain injury.

c) Retrograde amnesia

Involves the loss of memories for events that occurred before the onset of amnesia. It affects past memories, not the ability to form new ones.

Example: Forgetting memories from high school or college after sustaining a head injury.

d) Dissociative fugue

A rare and more severe form of dissociative amnesia where an individual suddenly and unexpectedly travels away from home or work, often adopting a new identity, and is unable to recall their past or personal identity.

Example: Waking up in a new city with no memory of how they got there or who they are, suddenly living under a new assumed name.

Q6: Superior autobiographical memory

Correct: a) Accurate recall of life events

✅ Why it’s correct

Superior autobiographical memory, now scientifically termed Highly Superior Autobiographical Memory (HSAM), is a rare condition where individuals can recall an unusually vast number of their personal life experiences, along with their associated dates (e.g., specific days of the week, locations, emotions) with extraordinary accuracy. These individuals do not necessarily have superior general memory; rather, their memory for personal, episodic events is exceptionally detailed and accessible.

Example:
Someone with HSAM could tell you exactly what they did, where they were, and what the weather was like on April 6, 2012, or any other specific date years or even decades ago.

❌ Other choices

b) Semantic memory

Refers to general world knowledge, facts, concepts, and ideas that are not tied to personal experiences or specific times of learning.

Example: Knowing that the capital of France is Paris or that birds have wings, without remembering when or where you learned this fact.

c) General memory definition

This is too broad and describes the entire capacity to store and retrieve information, not a specific superior ability focused on personal events.

Example: Remembering anything at all, from facts to skills.

d) Long-term memory

The vast capacity storage system for all our non-immediate memories, encompassing episodic, semantic, and procedural memories. It describes a type of memory system, not a superior form of recall for life events.

Example: Remembering facts learned in school, how to ride a bike, or the details of your last birthday.

Q7: Short-term memory assumption

Correct: a) Limited in capacity

✅ Why it’s correct

One of the most defining characteristics of short-term memory (STM) is its severely limited capacity. Psychologist George A. Miller famously proposed the