Chapter 2 Exercises: Experiencing Memory in Action
The best way to understand memory is to watch it work — and fail — in real time. These exercises are designed to give you direct experience of the principles in Chapter 2, not just conceptual understanding. You should feel each one before you explain it.
Exercise 1: Working Memory Capacity Test
Time required: 15–20 minutes Materials: Paper, someone to read to you OR ability to read and immediately look away
Working memory holds roughly four chunks of information. Let's find your current practical capacity.
Test 1 — Digit span forward
Have someone read you the following sequences of numbers, one digit per second. After each sequence, immediately repeat the digits in order without writing anything down. If nobody's available to read to you, read the row yourself and immediately look away.
Start from the top and see how far down you get before you can no longer reliably recall the sequence:
4 – 7 – 2 9 – 3 – 6 – 1 5 – 8 – 2 – 7 – 4 3 – 1 – 9 – 5 – 2 – 8 7 – 4 – 6 – 1 – 9 – 3 – 2 2 – 8 – 5 – 3 – 7 – 1 – 4 – 9
Write down: how many digits could you reliably hold? This is your raw digit span.
Test 2 — Chunking advantage
Now try these sequences. This time, notice whether you group them automatically:
1 – 9 – 8 – 4 1 – 7 – 7 – 6 – 1 – 9 – 6 – 9 3 – 1 – 4 – 1 – 5 – 9 – 2 – 6
For many people, the second sequence (1776, 1969 — recognizable as years) and the third (pi to 8 digits) are surprisingly manageable despite their length, because existing knowledge chunks the information. Your digit span expanded without your working memory actually getting larger.
Reflection: - What was your raw digit span in Test 1? - Which sequences in Test 2 felt easier than they should have? Why? - What does this tell you about the role of prior knowledge in managing working memory load? - What does this imply about why experts learn new material in their domain faster than novices?
Exercise 2: The Primacy and Recency Experiment
Time required: 45–60 minutes across two sittings Materials: Paper, timer
Sitting 1 (5 minutes):
Read the following list of words once at a steady pace — about one word per two seconds. Don't try to memorize them. Just read.
DEMOCRACY — SANDPAPER — TELESCOPE — MELANCHOLY — HAMMER — REVOLUTION — PILLOW — STRATEGY — CANDLE — THRESHOLD — RIVER — SYMPHONY — BRACKET — PHILOSOPHY — GRAPE
Immediately after reading, set a two-minute timer and write down every word you can remember in any order.
Count: how many did you recall total? Write down the position of each recalled word in the original list (which number in the sequence was it?).
Analysis: - Which words did you recall most frequently? The first few? The last few? Any unusual or emotionally resonant ones? - What was in the "middle" of the list? This is the serial position dip — words in the middle of a list are remembered worst because they don't benefit from either the primacy advantage (plenty of working memory available at the start) or the recency advantage (still in working memory at the end).
Sitting 2 (30 minutes later):
Without looking at the list, try to recall the words again. Write down everything you can.
Compare with your first attempt. What happened to: - The primacy words (first 3–5)? These should have moved to long-term memory; they may survive relatively well. - The recency words (last 3–5)? These were in working memory last time but may not have been consolidated into long-term memory; they often fade faster. - The middle words? Already poor recall probably stayed poor or got worse.
Reflection: - What does the change between your two recall attempts tell you about the difference between working memory and long-term memory? - What's the implication for studying? (Hint: the end-of-session review effect — what you study last is in working memory and feels well-learned, but may not make it to long-term storage without reinforcement.)
Exercise 3: Tip-of-the-Tongue Experience Analysis
Time required: 20–30 minutes Materials: Journal
Tip-of-the-tongue (TOT) states are retrieval failure with a distinctive subjective experience: you know you know something, you can feel the shape of the word or memory, you might know its first letter or how many syllables it has — but you can't actually retrieve it. They're frustrating, and they're also incredibly informative about how retrieval works.
Part A: Collect examples
Over the next few days (this exercise spans some time), keep a running list of tip-of-the-tongue states you experience. When you can't remember someone's name, a word you want to use, the title of something, a fact you definitely knew — write down:
- What were you trying to recall?
- What did you know about it? (first letter, number of syllables, associated images, related information that came up)
- Did the word/name eventually come to you? How — suddenly, with a hint, or never?
- What finally triggered retrieval, if anything?
Part B: Analysis
After collecting at least five examples, look at patterns: - What types of information produced TOT states most often? Names? Rare words? Things you haven't thought about recently? - How much partial information could you access even when full retrieval failed? What does this tell you about how memory is organized? - What broke the TOT state when it broke? A related image? Saying the first letter aloud? Changing the subject and coming back?
Reflection: - Retrieval failure in TOT states shows that the information has storage strength (you know you know it) but insufficient retrieval strength. What conditions might have maintained higher retrieval strength for this information? - The information that eventually "comes to you" when you're no longer actively trying suggests retrieval pathways that aren't immediately accessible through direct search. What does this imply about building multiple retrieval pathways through varied encoding?
Exercise 4: The Context-Dependent Memory Experiment
Time required: Two 20-minute sessions, ideally in different locations Materials: A list of 15–20 facts you need to learn for your current courses or Progressive Project
Session 1:
Choose a very specific location — a particular coffee shop, a specific bench outdoors, a friend's dorm room. Study fifteen to twenty facts about your chosen topic in that location. Use whatever methods you normally use. Study until you feel you know the material reasonably well.
Wait at least 24 hours.
Session 2:
Test yourself on those same facts in two conditions: 1. First, in the original location from Session 1 (or a very similar one). 2. Then, in a completely different environment — different lighting, different ambient noise, different building.
Try to recall the facts as a simple written list — no notes.
Compare your recall in both conditions.
Reflection: - Was there a difference in how easily you recalled the information in the original location versus the different one? - What does this tell you about context-dependent retrieval and why studying in varied environments (rather than always the same spot) may produce more context-independent memory? - How could you apply this insight to exam preparation — where the test room is probably not the room you studied in?
Exercise 5: Levels of Processing Comparison
Time required: 45 minutes Materials: A textbook section you haven't read yet
This experiment directly tests the levels of processing theory on your own memory.
Setup: Find a textbook section with roughly twenty to thirty key terms, concepts, or facts. Divide them into three groups of equal size.
Group 1 — Structural processing: For each item in this group, simply identify whether it is printed in bold or regular text, or whether it contains more than eight letters. Just notice the visual/structural feature. Don't try to understand or remember it.
Group 2 — Phonemic processing: For each item in this group, say it silently in your mind and decide whether it contains a long vowel sound, or whether it rhymes with a common word. Think about its sound, not its meaning.
Group 3 — Semantic processing: For each item in this group, think about what it means. Try to generate an example, connect it to something you already know, or ask yourself why it's true. Give yourself 10–20 seconds per item.
Test (20 minutes later, without notes): Write down as many items as you can recall from each group.
Reflection: - Which group produced the best recall? Which was worst? - Did the difference surprise you, given that you didn't "try to memorize" any of them — just processed them differently? - What does this suggest about the mechanism behind effective studying? (Hint: deep processing = better encoding, regardless of intent to memorize.) - How does this inform what "active reading" should actually look like?
Exercise 6: Proactive Interference in Action
Time required: Two 15-minute sessions separated by 30 minutes Materials: Paper
Session 1:
Memorize List A. Study it until you can recall all items correctly:
List A: Appointment — Meadow — Sequence — Bramble — Covenant — Flourish — Pilgrimage — Dormant — Tenacity — Cascade
Test yourself. Can you write all ten from memory? If not, study a bit more.
30-minute break — do something else entirely.
Session 2:
Now memorize List B. Study it until you can recall all items correctly:
List B: Appointment — Harbor — Sequence — Tangled — Covenant — Wither — Pilgrimage — Restless — Tenacity — Summit
Notice that five items are the same as List A, and five are different.
Immediately after studying List B, write from memory as many items as you can from List A.
Analysis: - How did studying List B affect your ability to recall List A? - Which items from List A were hardest to recall — the ones that appeared in both lists (same words) or the ones that only appeared in List A? - Did any List B items "intrude" when you were trying to recall List A?
Reflection: - This is proactive interference in action: the older memory competes with the newer one, and vice versa. - What are the implications for studying similar subjects in close sequence? (Spanish immediately followed by French, calculus immediately followed by statistics, etc.) - What scheduling strategy would reduce the interference between similar subjects?
Exercise 7: The Retrieval vs. Restudy Experiment
Time required: Two sessions of 20 minutes each, separated by a week Materials: Any material you need to learn
This experiment replicates, in miniature, the core finding of retrieval practice research.
Session 1:
Divide whatever you need to learn into two equal halves — call them Set A and Set B.
For Set A: Read and reread for ten minutes. Go over it carefully. Let it feel familiar.
For Set B: Read it once. Then close your notes and try to recall everything you can. Write it out. Check what you missed. Try again. Spend ten minutes on this process — but primarily trying to retrieve, not read.
After Session 1: Rate your confidence for Set A and Set B. Which do you feel you know better?
One week later — Session 2:
Without reviewing either set in the interim, test yourself on both. Write out everything you can recall from Set A. Then Set B. Grade yourself.
Reflection: - Which set did you know better immediately after Session 1? Which set did you know better a week later? - Most people feel more confident about the restudied set (Set A) immediately after the session — the fluency illusion. But most people actually remember the retrieved set (Set B) better a week later. - How does this experience change how you plan to study going forward?
Exercise 8: The Progressive Project Memory Diagnosis
Time required: 30 minutes Materials: Journal
This is your applied memory diagnosis for your chosen learning goal.
Step 1: Think about the last time you seriously engaged with material in your Progressive Project domain. What happened to that knowledge? What can you still recall right now, without looking anything up?
Step 2: Diagnose the failure mode. For the things you've forgotten: - Was it encoding failure? (You never really processed it deeply — you skimmed it, recognized it, but didn't generate meaning.) - Was it storage decay? (You encoded it, but never returned to it, and retrieval strength decayed below threshold.) - Was it retrieval failure? (You know you know it but can't access it — it's stored but not reachable.) - Was it interference? (Similar information from other sources is crowding it out.)
Step 3: Design a one-week study plan for your Progressive Project that specifically addresses your diagnosed failure mode. What would you change about when you study, how you process material, and how you test yourself?
Step 4: Identify the first specific thing you want to learn in your Progressive Project, and write a plan for encoding it deeply: What semantic processing questions will you ask? When will you do your first retrieval practice session? When will you schedule your first review?
These exercises aren't homework — they're data collection. The data is about your own memory, your own learning patterns, and your own vulnerabilities. The more clearly you can see how your memory actually works (not how you assume it works), the more precisely you can design your study strategies around its actual architecture.