MCAT Psychological Social Foundations Quiz: 6b Forgetting Memory Disorders Plasticity

What this quiz covers

This quiz focuses on 6b Forgetting Memory Disorders Plasticity, giving you a quick way to practice the rules, question types, and explanations that matter most for MCAT Psychological Social Foundations.

How to use this quiz

Try each quiz question before looking at the correct answer. Use the explanations to review missed ideas, then come back to similar questions until the pattern feels familiar.

Question 1

1. Greater loss for events closer in time to the injury than for events from months earlier (correct answer)
2. Equal loss for all pre-injury events regardless of their temporal distance from the injury
3. Selective impairment in working memory span with preserved autobiographical recall
4. Improved recall for the hours before the injury due to heightened emotional salience

Explanation: This question tests understanding of forgetting, memory disorders, and neural plasticity. Memory disorders can involve disruptions in encoding, storage, or retrieval, and neural plasticity refers to the brain's ability to adapt to new information or recover from injury. In the vignette, the described symptoms indicate retrograde amnesia with a temporal gradient and suggest potential for plasticity through consolidation processes. Choice A is correct because it aligns with the known effects of disrupted consolidation affecting recent memories more than remote ones. Choice B is incorrect because it misinterprets the role of temporal gradients, commonly misunderstood as uniform loss in traumatic amnesia. In similar questions, verify the alignment of symptoms and interventions with established research findings; avoid overgeneralizing beyond the provided context.

Question 2

1. Avoidance of recognition formats because recognition always reflects guessing rather than memory
2. Elimination of all reminders to reduce dependence on external aids and force reconsolidation
3. Single-session cramming of new information to maximize trace strength before decay
4. Training in structured cue use (e.g., category prompts and checklists) to support retrieval in context (correct answer)

Explanation: This question tests understanding of forgetting, memory disorders, and neural plasticity. Memory disorders can involve disruptions in encoding, storage, or retrieval, and neural plasticity refers to the brain's ability to adapt to new information or recover from injury. In the vignette, the described symptoms indicate retrieval deficits post-poisoning and suggest potential for plasticity through cue-based training. Choice D is correct because it aligns with the known effects of structured cues supporting retrieval in such profiles. Choice C is incorrect because it misinterprets the role of cramming, commonly misunderstood as effective for long-term retention. In similar questions, verify the alignment of symptoms and interventions with established research findings; avoid overgeneralizing beyond the provided context.

Question 3

1. Worsened recall because increasing connectivity necessarily increases decay of stored traces
2. Improved recall for all lifetime autobiographical events regardless of training exposure
3. No change in recall because stimulation can only influence peripheral sensory processing
4. Improved delayed recall for trained material with increased functional connectivity between parietal cortex and hippocampus (correct answer)

Explanation: This question tests understanding of forgetting, memory disorders, and neural plasticity. Memory disorders can involve disruptions in encoding, storage, or retrieval, and neural plasticity refers to the brain's ability to adapt to new information or recover from injury. In the vignette, the described symptoms indicate early Alzheimer pathology and suggest potential for plasticity through stimulation-enhanced connectivity. Choice D is correct because it aligns with the known effects of modulating hippocampal networks for memory improvement. Choice B is incorrect because it misinterprets the role of generalization, commonly misunderstood as affecting all memories uniformly. In similar questions, verify the alignment of symptoms and interventions with established research findings; avoid overgeneralizing beyond the provided context.

Question 4

1. Worsened recall accuracy because lowering arousal prevents any encoding of new safety learning
2. Complete loss of all declarative memory for the event because extinction deletes the original trace
3. Improved procedural motor learning because fear extinction generalizes to basal ganglia circuits
4. Reduced distress and fewer trauma reminders triggering fear responses, while the factual memory of the event remains accessible (correct answer)

Explanation: This question tests understanding of forgetting, memory disorders, and neural plasticity. Memory updating through extinction involves forming new inhibitory associations that suppress fear responses without erasing the original memory trace, often facilitated by reduced arousal during therapy to enhance safety learning. In the vignette, the medication-assisted exposure therapy aims to modify the traumatic fear memory by adding new, non-threatening contextual information while preserving factual recall. Choice D is correct because it aligns with the known effects of fear extinction in reducing emotional distress and conditioned responses while maintaining access to the declarative memory of the event. Choice B is incorrect because it misinterprets the role of extinction, commonly misunderstood as deleting the original memory rather than overlaying it with new learning. In similar questions, verify the alignment of symptoms and interventions with established research findings; avoid overgeneralizing beyond the provided context.

Question 5

1. Both schedules yield identical delayed recall because spacing affects only procedural learning
2. Massed practice yields better delayed recall because repetition without breaks prevents interference
3. Spaced practice yields worse delayed recall because consolidation requires uninterrupted study
4. Massed practice yields better immediate recall, but spaced practice yields better 1-week delayed recall (correct answer)

Explanation: This question tests understanding of forgetting, memory disorders, and neural plasticity. Memory disorders can involve disruptions in encoding, storage, or retrieval, and neural plasticity refers to the brain's ability to adapt to new information or recover from injury. In the vignette, the described symptoms indicate mild cognitive impairment and suggest potential for plasticity through spaced practice. Choice D is correct because it aligns with the known effects of spacing in enhancing long-term retention via synaptic strengthening. Choice B is incorrect because it misinterprets the role of massed practice, commonly misunderstood as superior for delayed recall. In similar questions, verify the alignment of symptoms and interventions with established research findings; avoid overgeneralizing beyond the provided context.

Question 6

1. Only participants with high trait anxiety show a testing benefit because arousal is required for storage
2. Items that were retrieved immediately are recalled worse one week later because retrieval accelerates decay
3. No difference appears because retrieval practice affects only short-term storage
4. Items that were retrieved immediately are recalled better one week later than items that were only studied (correct answer)

Explanation: This question tests understanding of forgetting, memory disorders, and neural plasticity. Memory disorders can involve disruptions in encoding, storage, or retrieval, and neural plasticity refers to the brain's ability to adapt to new information or recover from injury. In the vignette, the described symptoms indicate benefits of testing effect and suggest potential for plasticity through retrieval practice. Choice D is correct because it aligns with the known effects of testing strengthening long-term memory. Choice B is incorrect because it misinterprets the role of retrieval, commonly misunderstood as accelerating decay. In similar questions, verify the alignment of symptoms and interventions with established research findings; avoid overgeneralizing beyond the provided context.

Question 7

1. Divided attention reduces accuracy only for items encoded under full attention due to interference
2. Divided attention improves later source accuracy because multitasking increases arousal
3. Divided attention affects only reaction time at test, with no change in accuracy
4. Divided attention reduces later source accuracy more than recognition accuracy, relative to full attention (correct answer)

Explanation: This question tests understanding of forgetting, memory disorders, and neural plasticity. Memory disorders can involve disruptions in encoding, storage, or retrieval, and neural plasticity refers to the brain's ability to adapt to new information or recover from injury. In the vignette, the described symptoms indicate attention effects on memory encoding and suggest potential for plasticity through attentional modulation. Choice D is correct because it aligns with the known effects of divided attention impairing source memory more than item recognition. Choice B is incorrect because it misinterprets the role of multitasking, commonly misunderstood as improving memory via arousal. In similar questions, verify the alignment of symptoms and interventions with established research findings; avoid overgeneralizing beyond the provided context.

Question 8

1. Only participants with high working memory span show misinformation errors because storage is intact
2. Participants exposed to the incorrect narrative show improved accuracy because conflict enhances attention
3. Both groups show identical accuracy because reconsolidation cannot alter episodic memory
4. Participants exposed to the incorrect narrative are more likely to endorse the incorrect detail at delayed test (correct answer)

Explanation: This question tests understanding of forgetting, memory disorders, and neural plasticity. Memory disorders can involve disruptions in encoding, storage, or retrieval, and neural plasticity refers to the brain's ability to adapt to new information or recover from injury. In the vignette, the described symptoms indicate misinformation incorporation and suggest potential for plasticity through reconsolidation. Choice D is correct because it aligns with the known effects of misinformation updating memory traces. Choice B is incorrect because it misinterprets the role of conflict, commonly misunderstood as improving accuracy. In similar questions, verify the alignment of symptoms and interventions with established research findings; avoid overgeneralizing beyond the provided context.

Question 9

1. Improved motor performance of the affected limb accompanied by expansion of task-related cortical activation (correct answer)
2. Improved autobiographical recall because motor cortex reorganization generalizes to episodic memory
3. Immediate, complete recovery of strength because plasticity produces new neurons within days
4. Worsened performance because repeated use necessarily leads to synaptic weakening through habituation

Explanation: This question tests understanding of forgetting, memory disorders, and neural plasticity. Memory disorders can involve disruptions in encoding, storage, or retrieval, and neural plasticity refers to the brain's ability to adapt to new information or recover from injury. In the vignette, the described symptoms indicate post-stroke motor deficits and suggest potential for plasticity through CIMT. Choice A is correct because it aligns with the known effects of use-dependent reorganization in motor cortex. Choice D is incorrect because it misinterprets the role of repeated use, commonly misunderstood as causing habituation rather than strengthening. In similar questions, verify the alignment of symptoms and interventions with established research findings; avoid overgeneralizing beyond the provided context.

Question 10

1. Confabulation accompanied by impaired recall for recent events and relatively preserved immediate attention (correct answer)
2. Hypervigilance with intrusive flashbacks that are triggered by neutral cues
3. Progressive aphasia with early loss of word meaning and intact recent episodic recall
4. Transient amnesia lasting minutes with full recovery and no nutritional risk factors

Explanation: This question tests understanding of forgetting, memory disorders, and neural plasticity. Memory disorders can involve disruptions in encoding, storage, or retrieval, and neural plasticity refers to the brain's ability to adapt to new information or recover from injury. In the vignette, the described symptoms indicate Korsakoff syndrome with confabulation and suggest potential for plasticity through thiamine and orientation training. Choice A is correct because it aligns with the known effects of confabulation in filling memory gaps in this disorder. Choice C is incorrect because it misinterprets the role of aphasia, commonly misunderstood as a primary feature of Korsakoff. In similar questions, verify the alignment of symptoms and interventions with established research findings; avoid overgeneralizing beyond the provided context.

Question 11

1. Use of visuospatial imagery and map-based encoding strategies to support learning of verbal material (correct answer)
2. Elimination of all external cues during study to prevent context-dependent retrieval
3. Avoidance of repetition because repeated retrieval increases interference in long-term memory
4. Exclusive reliance on immediate serial recall drills to restore long-term episodic encoding

Explanation: This question tests understanding of forgetting, memory disorders, and neural plasticity. Memory disorders can involve disruptions in encoding, storage, or retrieval, and neural plasticity refers to the brain's ability to adapt to new information or recover from injury. In the vignette, the described symptoms indicate verbal memory deficits post-resection and suggest potential for plasticity through compensatory strategies. Choice A is correct because it aligns with the known effects of using preserved visuospatial systems for verbal tasks. Choice C is incorrect because it misinterprets the role of repetition, commonly misunderstood as increasing interference. In similar questions, verify the alignment of symptoms and interventions with established research findings; avoid overgeneralizing beyond the provided context.

Question 12

1. Participants show improved delayed recall primarily when distraction during learning is high (correct answer)
2. Participants show recovery of remote childhood memories without changes in attention measures
3. Participants show worse delayed recall because training saturates synaptic plasticity permanently
4. Participants show improved recall only for material learned before the intervention begins

Explanation: This question tests understanding of forgetting, memory disorders, and neural plasticity. Memory disorders can involve disruptions in encoding, storage, or retrieval, and neural plasticity refers to the brain's ability to adapt to new information or recover from injury. In the vignette, the described symptoms indicate attention-related memory issues post-TBI and suggest potential for plasticity through working memory training. Choice A is correct because it aligns with the known effects of training enhancing encoding under distraction. Choice D is incorrect because it misinterprets the role of generalization, commonly misunderstood as affecting pre-existing memories. In similar questions, verify the alignment of symptoms and interventions with established research findings; avoid overgeneralizing beyond the provided context.

Question 13

1. Repeated, feedback-driven practice of the route under gradually changing starting points (correct answer)
2. Single-session intensive rehearsal of route details followed by a delayed free-recall test
3. Hypnosis-based age regression to recover memories of prior route practice
4. Explicit instruction to visualize the route once, because imagery replaces consolidation

Explanation: This question tests understanding of forgetting, memory disorders, and neural plasticity. Memory disorders can involve disruptions in encoding, storage, or retrieval, and neural plasticity refers to the brain's ability to adapt to new information or recover from injury. In the vignette, the described symptoms indicate preserved procedural memory despite episodic amnesia and suggest potential for plasticity through variable practice. Choice A is correct because it aligns with the known effects of corticostriatal plasticity in enhancing procedural generalization. Choice C is incorrect because it misinterprets the role of hypnosis, commonly misunderstood as recovering lost episodic memories in amnesia. In similar questions, verify the alignment of symptoms and interventions with established research findings; avoid overgeneralizing beyond the provided context.

Question 14

1. Improved immediate memory span for novel digit sequences with no change in learning of new routines
2. Improved acquisition of new routine steps when training is repeated across days in a consistent context (correct answer)
3. Restoration of detailed episodic recall for events from the week before the stroke
4. Worsened recall of remote autobiographical facts due to interference from new learning

Explanation: This question tests understanding of forgetting, memory disorders, and neural plasticity. Memory disorders can involve disruptions in encoding, storage, or retrieval, and neural plasticity refers to the brain's ability to adapt to new information or recover from injury. In the vignette, the bilateral medial temporal lobe damage has caused severe anterograde amnesia (inability to form new episodic memories) while sparing procedural learning systems, which can still benefit from repeated practice. Choice B is correct because procedural memory and habit learning can occur through non-hippocampal circuits (e.g., striatum) and improve with consistent, repeated practice even in patients with hippocampal damage. Choice C is incorrect because episodic memories that require hippocampal processing cannot be restored once the hippocampus is damaged. In similar questions, distinguish between memory systems that require the hippocampus (episodic) versus those that can function through alternative circuits (procedural, habit learning).

Question 15

1. Early prominent personality disinhibition with preserved memory in the first years
2. Gradual, continuous decline without focal neurologic signs
3. Focal neurologic deficits that correlate with abrupt changes in cognition over time (correct answer)
4. Reversible memory impairment that resolves after thiamine administration alone

Explanation: This question tests understanding of forgetting, memory disorders, and neural plasticity. Memory disorders can involve disruptions in encoding, storage, or retrieval, and neural plasticity refers to the brain's ability to adapt to new information or recover from injury. In the vignette, the stepwise decline following transient episodes of weakness and multiple subcortical infarcts indicates vascular dementia, where cognitive decline correlates with cerebrovascular events. Choice C is correct because vascular dementia characteristically presents with focal neurologic deficits (from strokes) that correlate temporally with abrupt cognitive changes, creating a stepwise pattern of decline. Choice B is incorrect because it describes Alzheimer's disease pattern of gradual, continuous decline without focal signs. In similar questions, recognize that vascular dementia shows stepwise deterioration linked to vascular events, unlike the smooth progression of neurodegenerative dementias.

Question 16

1. Bilateral tremor at rest with bradykinesia as the primary cause of memory symptoms
2. Impaired short-term maintenance of information due to primary dorsolateral prefrontal damage
3. History of thiamine deficiency with damage to diencephalic structures involved in memory (correct answer)
4. Selective inability to recognize familiar faces with preserved new learning

Explanation: This question tests understanding of forgetting, memory disorders, and neural plasticity. Memory disorders can involve disruptions in encoding, storage, or retrieval, and neural plasticity refers to the brain's ability to adapt to new information or recover from injury. In the vignette, the acute confusion, gait instability, severe anterograde amnesia, and confabulation following alcohol use disorder strongly suggests Wernicke-Korsakoff syndrome caused by thiamine deficiency. Choice C is correct because Wernicke-Korsakoff syndrome results from thiamine deficiency damaging diencephalic structures (mammillary bodies, dorsomedial thalamus) critical for memory, explaining the severe amnesia and confabulation. Choice A is incorrect because tremor and bradykinesia indicate Parkinson's disease, which doesn't cause the severe amnesia described. In similar questions, recognize the triad of Wernicke's encephalopathy (confusion, ataxia, ophthalmoplegia) progressing to Korsakoff's amnesia with confabulation in alcoholic patients.

Question 17

1. Massed practice of the association in a single uninterrupted 20-minute block with no delays
2. Repeated retrieval attempts with gradually increasing intervals and immediate feedback after errors (correct answer)
3. Passive rereading of the association at fixed intervals without requiring active recall
4. Training limited to relaxation and breathing exercises to reduce sympathetic arousal during testing

Explanation: This question tests understanding of forgetting, memory disorders, and neural plasticity. Neural plasticity in memory rehabilitation leverages spaced practice to strengthen traces through repeated reactivation, enhancing long-term retention in disorders like mild cognitive impairment, unlike massed or passive methods that yield weaker effects. In the vignette, spaced retrieval training builds recall at increasing intervals with feedback, promoting plasticity by reactivating traces under delay challenges. Choice B is correct because repeated retrieval with expanding intervals and feedback mirrors the mechanism, fostering synaptic strengthening for better recall. Choice A is incorrect because massed practice leads to temporary gains without the spaced reactivation needed for plasticity, often confused with efficient learning but less effective long-term. In similar questions, verify interventions against plasticity mechanisms like reactivation timing; avoid equating passive review with active retrieval for memory enhancement.

Question 18

1. Primary impairment in working memory span with preserved long-term episodic memory consolidation
2. Sudden onset of retrograde amnesia after psychological stress, with intact new learning
3. Progressive aphasia with preserved episodic memory early in the disease course
4. Confabulation with impaired new learning, consistent with a diencephalic memory disorder affecting recall (correct answer)

Explanation: This question tests understanding of forgetting, memory disorders, and neural plasticity. Memory disorders like Korsakoff syndrome involve diencephalic damage from thiamine deficiency, causing anterograde amnesia, confabulation, and reliance on external aids for plasticity-based compensation, differing from dissociative or aphasic conditions. In the vignette, the patient's confabulation, new learning impairment, and gait issues with thiamine treatment suggest Korsakoff's, emphasizing external strategies over internal ones. Choice D is correct because it captures confabulation and impaired learning in diencephalic disorders, consistent with alcohol-related pathology. Choice B is incorrect because it describes dissociative amnesia with intact new learning, not matching the organic anterograde and confabulatory features here. In similar questions, verify disorder symptoms against brain regions like diencephalon versus cortex; avoid overgeneralizing stress-related amnesias to nutritional deficiencies.

Question 19

1. Reduced emotional intensity at one week with preserved factual content, consistent with updating during re-storage (correct answer)
2. Complete erasure of the event narrative at one week, consistent with permanent disruption of all episodic traces
3. No change at one week because retrieval makes memories fixed and resistant to modification
4. Improved working memory capacity at one week, consistent with generalized attentional training effects

Explanation: This question tests understanding of forgetting, memory disorders, and neural plasticity. Neural plasticity enables reconsolidation, where retrieved memories become labile and can be updated, reducing emotional intensity in maladaptive memories while preserving factual details, as seen in therapeutic interventions. In the vignette, recalling a distressing event followed by reappraisal and testing exploits post-retrieval plasticity for durable changes assessed after a week. Choice A is correct because reduced emotional intensity with intact facts reflects successful updating during reconsolidation. Choice B is incorrect because it suggests complete erasure, overestimating reconsolidation as total deletion rather than modification, a common exaggeration. In similar questions, verify outcomes against reconsolidation principles like emotional versus factual changes; avoid assuming memories become immutable post-retrieval without intervention evidence.

Question 20

1. Only categories never practiced show reduced recall because inhibition targets novel items
2. All exemplars from all categories are recalled equally well because practice prevents interference
3. Practiced exemplars are recalled worse than unpracticed exemplars due to fatigue
4. Unpracticed FRUIT exemplars are recalled worse than unpracticed TOOL exemplars at final test (correct answer)

Explanation: This question tests understanding of forgetting, memory disorders, and neural plasticity. Memory disorders can involve disruptions in encoding, storage, or retrieval, and neural plasticity refers to the brain's ability to adapt to new information or recover from injury. In the vignette, retrieval-induced forgetting demonstrates that practicing some items from a category (FRUIT-orange) causes forgetting of unpracticed items from the same category (FRUIT-banana) through inhibitory control processes. Choice D is correct because unpracticed FRUIT exemplars suffer from retrieval-induced forgetting due to inhibition during practice of other FRUIT items, while unpracticed TOOL exemplars remain unaffected since no TOOL items were practiced. Choice B is incorrect because retrieval practice creates interference within categories, not equal recall across all items. In similar questions, retrieval-induced forgetting affects unpracticed items within practiced categories, not items from entirely unpracticed categories.