These experiments are among the most frequently discussed in psychology entrance and qualification exams like CUET (Central University Entrance Test) and UGC NET (National Eligibility Test) because they form the core foundation of psychological science and theory application. These exams focus on testing conceptual clarity, experimental understanding, and real-world relevance of psychological constructs such as obedience, conformity, learning, memory, emotion, perception, and social behaviour.

Let’s talk quickly first, discuss the concepts Memory & Cognition, before diving into the experiments

Memory: The system that stores and recalls information.

• Example: You remember your best friend’s birthday, the lyrics of a song, or the route to your home.

Cognition: The mental processes of thinking, problem-solving, decision-making, and understanding.

• Example: You use memory of past exams to plan your study strategy, or compare prices before buying something.

Here’s the catch: Memory gives you the raw storage of information, but cognition is about using that information intelligently.

Example: You recall the recipe for pasta (memory), and then decide to substitute one ingredient with another because it’s healthier (cognition).

So, next time you’re solving a problem, ask: Am I just remembering facts, or actually thinking about how to use them?

Must-Know Memory & Cognition Experiments

1. Ebbinghaus – Forgetting Curve
2. Loftus & Palmer – Eyewitness Memory (Car Crash)
3. Loftus – False Memories (Lost in the Mall)
4. Bartlett’s – War of the Ghosts
5. Moray – Dichotic Listening
6. Libet – Readiness Potential

Experiments: Sensation & Perception

A video has been added to the heading of all experiments to allow understanding of concepts visually.

1. Ebbinghaus – Forgetting Curve
   Hermann Ebbinghaus (1885) wanted to study memory scientifically, so he tested it on himself. He memorised long lists of nonsense syllables (like DAX, QEH, LUH) so that prior knowledge wouldn’t interfere. Then he tested how much he remembered after different time gaps (minutes, hours, days)

Findings: He discovered that memory loss follows a predictable pattern; we forget information very quickly right after learning, but the rate of forgetting slows down over time. This pattern was drawn as the famous “forgetting curve.”

Concepts:

• Rapid forgetting: Most information is lost within the first 24 hours.
• Slower decline: What survives after that tends to stay much longer.
• Savings effect/ Relearning effect: Information is easier to relearn the second time, proving that traces of memory remain.
• Spacing effect: Reviewing material at spaced intervals slows down forgetting.

2. Loftus & Palmer – Eyewitness Memory (Car Crash, 1974)
Elizabeth Loftus and John Palmer showed participants short films of car accidents. Afterwards, they asked questions about what they saw. The key trick: the wording of the question was changed. For example: “How fast were the cars going when they smashed / hit / bumped/contacted each other?”

Findings:

• People gave higher speed estimates when the verb was stronger (“smashed” > “hit”).
• A week later, those who heard “smashed” were more likely to (falsely) remember seeing broken glass even though none was shown.

Concepts:

• Eyewitness memory is fallible, not a perfect recording.
• Misinformation affects wording, which can change recall.
• Reconstructive memory is rebuilt using cues + expectations.
• False memories: People can confidently “remember” things that never occurred.
• Applied impact reliability of eyewitness testimony is questioned in courts.

3. Loftus – False Memories (Lost in the Mall)

Participants were told a few true childhood stories from their families, plus one fake story about how they were once lost in a shopping mall. Over time, many not only accepted the false story but also added vivid details, like who helped them or how they felt.

Findings: Memory is not like a video camera; it can be implanted and altered.

Concepts:

• False Memories
• Suggestibility
• Malleability of Memory
• Reliability of Eyewitness Testimony

4. Bartlett’s “War of the Ghosts” (1932)

Bartlett (1932) told people in England a Native American story called “The War of the Ghosts.” When asked to retell it later, they left out details, shortened it, and changed parts to fit their own culture (like saying “boats” instead of “canoes”). This showed that memory is not like a video recorder; it’s reconstructed each time, shaped by our own knowledge, culture, and expectations.

Finding: Memory is reconstructed, not exactly shaped by culture, knowledge, and expectations.

Concepts:

• Memory is reconstructive, not a perfect recording.
• People use schemas (mental frameworks from culture and experience) to make sense of new information.
• Cultural background influences what we remember and how we recall it.
• Memory is prone to distortion over time.

Now Bartlett’s “War of the Ghosts and Loftus False Memories (Lost in the Mall) sound very similar, but they are slightly different from one another.

5. Colin Cherry and Neville Moray’s Dichotic Listening task

In the Dichotic Listening Task, participants wore headphones and heard two different messages at the same time, one in each ear. They were asked to “shadow” (repeat aloud) the message in one ear while ignoring the other. To test attention limits, researchers slipped in changes in the unattended ear, like the participant’s own name or a sudden voice change (male to female), to see if people noticed.

Findings- The study found that people could follow one message well, showing that selective attention works, but most information in the ignored ear was completely missed, except when personally meaningful words, like their own name, sometimes broke through attention

Concepts

• Selective Attention: We filter what we focus on.
• Shadowing Technique: A way to test divided attention.
• Cocktail Party Effect: Even in noisy settings, you can pick out something personally important (like your name).
• Limits of Attention: Attention isn’t perfect; some unattended info sneaks in.

6. Libet – Readiness Potential experiment

Benjamin Libet asked participants to perform a simple voluntary movement (like flexing their wrist) whenever they felt like it, while brain activity was recorded with an EEG. Participants also reported the exact moment they became aware of their intention to move by watching a clock. Surprisingly, brain activity (called the readiness potential) started several hundred milliseconds before participants reported the conscious decision to move.

Findings:
This suggests that the brain unconsciously prepares for an action before we become aware of the decision to act. In other words, what we think of as a “free decision” might actually be the brain’s preparation that reaches consciousness only afterwards. However, Libet also noted a small “veto window,” where people could stop the action even after the readiness potential began, suggesting some conscious control remains.

Concepts:

• Readiness Potential: The brain starts preparing to act before we feel we have decided.
• Unconscious vs. Conscious: Actions begin unconsciously, and we notice them later.
• Free Will Debate: Raises a question are choices truly ours or just brain’s work?
• Free Won’t: Even if the brain starts, we can still stop the action in time. also called the “Conscious Veto”
  

Let’s test your learning with CUET-style MCQs.

1. Ebbinghaus used nonsense syllables (like DAX, QEH, LUH) in his memory experiments because:
a) They were easy to remember
b) They prevented prior knowledge from interfering
c) They improved long-term recall
d) They were culturally neutral

2. Which concept best explains why information is easier to relearn the second time?
a) Spacing effect
b) Savings effect
c) Reconstruction
d) Priming

3. In Loftus & Palmer’s car crash study, participants reported higher speed estimates when the question used the verb:
a) “Contacted”
b) “Bumped”
c) “Smashed”
d) “Touched”

4. The Loftus & Palmer study is most strongly linked to which concept?
a) Schema-driven memory
b) Misinformation effect
c) Classical conditioning
d) Flashbulb memory

5. In the “Lost in the Mall” experiment, participants developed vivid details for an event that never happened. This demonstrates:
a) Cultural bias in memory
b) False memories due to suggestibility
c) Reconstructive memory
d) Semantic memory loss

6. Bartlett’s “War of the Ghosts” study showed that memory recall is influenced by:
a) Attention span
b) Conditioning
c) Cultural schemas
d) Sensory limitations

7. Which two experiments focus on the reconstructive nature of memory?
a) Ebbinghaus & Moray
b) Loftus & Palmer & Loftus’ False Memories
c) Bartlett & Loftus
d) Moray & Libet

8. In the Dichotic Listening task, participants could attend to one message but sometimes noticed their own name in the ignored channel. This is called:
a) Divided attention
b) Cocktail party effect
c) Schema activation
d) Shadowing bias

9. Libet’s Readiness Potential experiment raised debates about:
a) The accuracy of schemas
b) The reliability of eyewitness testimony
c) Whether free will exists
d) The spacing effect in memory

10. According to Libet, even if brain activity begins before conscious awareness, humans may still have the ability to stop an action. This is called:
a) Free will
b) Free won’t (Conscious veto)
c) Selective attention
d) Delayed intention

Answer Key

1 – b) They prevented prior knowledge from interfering
2 – b) Savings effect
3 – c) “Smashed”
4 – b) Misinformation effect
5 – b) False memories due to suggestibility
6 – c) Cultural schemas
7 – c) Bartlett & Loftus
8 – b) Cocktail party effect
9 – c) Whether free will exists
10 – b) Free won’t (Conscious veto)