CUET UG Psychology Basic Processes Memory Encoding Storage Retrieval Forgetting Theories

Must-Know (15–20 detailed bullets)

• Encoding is the process of transforming sensory input into a form that can be stored in memory; for example, visual encoding converts images into mental pictures, as when remembering a friend’s face.
• Acoustic encoding involves storing information based on sound, such as repeating a phone number aloud to remember it temporarily.
• Semantic encoding is the most effective form of encoding, involving meaning; for instance, understanding the definition of “cognitive dissonance” helps in long-term retention.
• Maintenance rehearsal involves repeating information to keep it in short-term memory, like mentally rehearsing a PIN code for a few seconds.
• Elaborative rehearsal links new information to existing knowledge, enhancing transfer to long-term memory; e.g., associating the term “neuroplasticity” with brain recovery after injury.
• Atkinson and Shiffrin’s modal model of memory proposes three stages: sensory memory, short-term memory (STM), and long-term memory (LTM).
• Sensory memory holds information from the senses for a very brief duration: iconic memory (visual) lasts about 0.5 seconds, while echoic memory (auditory) lasts up to 3–4 seconds.
• Short-term memory has a limited capacity of about 7±2 items, as demonstrated by George Miller’s “magic number” experiment.
• Working memory, an extension of STM, includes the central executive, phonological loop, visuospatial sketchpad, and episodic buffer, as proposed by Baddeley and Hitch.
• Long-term memory is relatively permanent and has unlimited capacity; it includes explicit (declarative) and implicit (non-declarative) memory.
• Explicit memory involves conscious recall and is divided into episodic memory (personal experiences, e.g., your first day at college) and semantic memory (general knowledge, e.g., capital of India is Delhi).
• Implicit memory operates unconsciously and includes procedural memory (skills like riding a bicycle) and priming (exposure to a stimulus influences response to a later stimulus).
• Retrieval is the process of accessing stored information; two main methods are recall (retrieving information without cues, e.g., essay questions) and recognition (identifying information with cues, e.g., MCQs).
• The tip-of-the-tongue phenomenon is a retrieval failure where a person feels certain a word is known but cannot retrieve it, often due to incomplete activation of memory traces.
• Ebbinghaus’s forgetting curve shows that forgetting is rapid within the first hour after learning, with up to 50% of information lost within 20 minutes and about 70% within 24 hours.
• Decay theory suggests that memory traces fade over time due to disuse; for example, forgetting a password not used for months.
• Interference theory states that forgetting occurs due to competition from other information; proactive interference happens when old information disrupts recall of new (e.g., old phone number interfering with new), and retroactive interference occurs when new learning disrupts recall of old (e.g., learning Spanish after French makes recalling French verbs harder).
• Retrieval failure occurs when information is stored but cannot be accessed due to lack of appropriate cues; context-dependent memory (better recall in same environment) and state-dependent memory (better recall in same physiological/psychological state) support this.
• Motivated forgetting, as proposed by Freud, involves repression—unconsciously blocking distressing memories from awareness, such as forgetting traumatic childhood events.
• The serial position effect shows that people remember the first (primacy effect) and last (recency effect) items in a list best, due to transfer to LTM and STM retention respectively.

Difficulty Level

Intermediate — requires understanding of processes and theories with application-based distinctions, but no complex calculations or abstract laws.

Common CUET Traps (3 bullets)

• Trap: Confusing maintenance rehearsal with elaborative rehearsal, thinking both lead to long-term retention. Avoid: Only elaborative rehearsal leads to deep processing and transfer to long-term memory; maintenance rehearsal only sustains info in STM.
• Trap: Assuming that retrieval is the same as remembering, ignoring the role of cues. Avoid: Retrieval depends on availability of cues—recognition is easier than recall due to presence of retrieval cues.
• Trap: Believing that forgetting is always due to memory decay. Avoid: Forgetting can result from interference, retrieval failure, or motivated mechanisms—not just passage of time.

Practice MCQs (5 questions)

Q1. Which type of encoding is most effective for long-term retention?
A. Visual
B. Acoustic
C. Semantic
D. Tactile
Answer: C
Explanation: Semantic encoding involves processing meaning, which leads to deeper and more durable memory traces.
Why others fail: Visual and acoustic encoding are shallow and less effective for long-term storage.

Q2. According to Miller’s research, what is the average capacity of short-term memory?
A. 5±2 items
B. 7±2 items
C. 9±2 items
D. 3±2 items
Answer: B
Explanation: George Miller identified the “magic number” as 7±2 chunks of information in short-term memory.
Why others fail: Students often misremember the number as 5 or 9 due to confusion with other cognitive limits.

Q3. Forgetting due to previously learned information interfering with new learning is known as:
A. Retroactive interference
B. Proactive interference
C. Decay
D. Retrieval failure
Answer: B
Explanation: Proactive interference occurs when old memories hinder the recall of newer ones.
Why others fail: Retroactive interference (new disrupting old) is often confused with proactive interference due to similar wording.

Q4. Which component of working memory is responsible for processing visual and spatial information?
A. Central executive
B. Phonological loop
C. Episodic buffer
D. Visuospatial sketchpad
Answer: D
Explanation: The visuospatial sketchpad handles mental imagery and spatial tasks, such as navigating a room.
Why others fail: The central executive is often wrongly chosen as it controls attention, but does not store visual data.

Q5. A student learns French and later studies Spanish. She finds it difficult to recall French vocabulary. This is an example of:
A. Proactive interference
B. Motivated forgetting
C. Retroactive interference
D. Decay theory
Answer: C
Explanation: New learning (Spanish) interferes with the recall of previously learned material (French), which defines retroactive interference.
Why others fail: Proactive interference is tempting because French came first, but the interference is from newer learning.

Last‑Minute Revision (15–20 one‑liners)

• ⚠️ Encoding types: Visual (images), Acoustic (sound), Semantic (meaning) — semantic is most effective.
• ⚠️ Miller’s STM capacity: 7±2 items — verify from NCERT.
• ⚠️ Sensory memory duration: Iconic = 0.5 sec, Echoic = 3–4 sec — verify from NCERT.
• ⚠️ Atkinson-Shiffrin model: Sensory → STM → LTM — linear and structural.
• ⚠️ Working memory model: Baddeley & Hitch — includes central executive, phonological loop, visuospatial sketchpad, episodic buffer.
• ⚠️ Explicit memory: Conscious recall — episodic (events) and semantic (facts).
• ⚠️ Implicit memory: Unconscious — procedural (skills) and priming.
• ⚠️ Recall vs Recognition: Recall = no cues (essay), Recognition = with cues (MCQs).
• ⚠️ Tip-of-the-tongue: Retrieval failure with partial activation — verify from NCERT.
• ⚠️ Ebbinghaus forgetting curve: 50% forgotten in 20 min, 70% in 24 hrs — verify from NCERT.
• ⚠️ Decay theory: Memory fades with time due to disuse — no external interference.
• ⚠️ Proactive interference: Old info disrupts new (e.g., old password blocks new).
• ⚠️ Retroactive interference: New info disrupts old (e.g., new language affects old).
• ⚠️ Retrieval failure: Info present but inaccessible — cues matter (context/state-dependent).
• ⚠️ Context-dependent memory: Better recall in same environment (e.g., studying in exam hall).
• ⚠️ State-dependent memory: Better recall in same internal state (e.g., sober vs. stressed).
• ⚠️ Serial position effect: Primacy (first items, LTM) and Recency (last items, STM).
• ⚠️ Motivated forgetting: Freud’s repression — blocking traumatic memories unconsciously.
• ⚠️ Maintenance rehearsal: Rote repetition — keeps info in STM only.
• ⚠️ Elaborative rehearsal: Links to existing knowledge — transfers to LTM.