Five Executive Functions in Practice — Issue 2: Working Memory

He has shopped at the same grocery store for twenty-three years.

He knows the layout. Produce on the left. Cereal in aisle four. Frozen foods at the back. He does not need a map because the map has always lived in his head.

Since the stroke, he comes home without half the list. Not because he forgot what he needed. He has the list in his hand. He comes home missing items because he cannot hold the spatial layout of the store in his mind while he is moving through it. He walks past cereal three times. He doubles back. He restarts from the entrance. The trip that used to take twenty minutes now takes an hour and ends in exhaustion and gaps.

👉 This is not a memory problem in the general sense. It is a visual working memory deficit, the specific inability to create and hold a spatial mental image while simultaneously using it to guide behavior.

It is trainable. And a 3x4 grid of images is how you start.

What the activity actually is

The tools:

🗂️ The 3x4 Visual Memory Grid — 12 images arranged in a fixed grid, printed or displayed on a card. The grid content is interchangeable: the Hay to Couch set is the starting point, but any 12 images meaningful to your patient work — grocery items, household objects, a floor plan.

🃏 Clinician question cards — four levels, each targeting a distinct working memory demand

⏱️ A timer

📋 A tracking sheet: accuracy by level, errors with grid visible vs. hidden, response latency, level at which performance breaks down

The setup:

Grid card placed flat on the table in front of the patient. Clinician holds the question card stack. Patient studies the grid — do not rush this. The encoding phase is part of the intervention.

The task, in four levels:

Level 1 — Basic Position. Grid visible. Clinician asks where a specific image is located by row and column. This establishes whether the patient can accurately read and report spatial positions from a visible reference. This is not yet working memory — it is visual scanning and spatial language. It is your baseline.

Level 2 — Spatial Shifts. Grid visible, then covered. Clinician asks what is one space up, left, right, or diagonally from a named image. Patient must mentally navigate within the grid from a known anchor point. The grid is no longer available. The map is now in the mind.

Level 3 — Semantic Retrieval. Grid covered. Clinician asks which image belongs to a category — something used for sleeping, something found on a farm. Patient must search the mental grid by meaning, not just location. This is the level that most closely matches the functional demand of navigating a grocery store by department.

Level 4 — Relative Position. Grid covered. Multi-step spatial questions: what is two spaces down from Hay? What is one up and one right from Tractor? Patient must hold the grid, navigate multiple steps, and report without losing place. This is the highest working memory load in the protocol.

👉 The grid is not the intervention. Removing the grid is the intervention.

Before the first question — lead with science every time

Before the grid goes down, say this:

"What's happening at the grocery store isn't that you're forgetting things. It's that your brain is having trouble holding the map of the store in mind while you're walking through it at the same time. Working memory is what keeps that map active while you're using it. What we're doing right now is training your brain to hold a visual map and work from it — without being able to see it. Every time I take the card away and ask you a question, that's a repetition of exactly the skill the store is asking for."

👉 The patient who understands they are rebuilding a specific cognitive system practices differently than the patient who thinks they are playing a memory card game.

Why removing the grid is the clinical move

With the grid visible, the patient is reading. That is not working memory, it is visual scanning. Accurate performance with the grid present tells you the patient can process spatial information. It tells you nothing about whether they can hold it.

The moment the grid is covered, the task changes entirely. Now the patient must retrieve from a mental image they constructed during encoding. The quality of that mental image — how complete it is, how stable it is under questioning, how navigable it is when the questions require spatial movement, is your working memory data.

👉 A patient who is accurate at Level 1 with the grid visible and fails at Level 2 with it covered has an encoding-to-retrieval gap. The information got in but the mental image is not stable enough to navigate. That is your intervention target.

A patient who succeeds at Level 2 but fails when semantic retrieval is required at Level 3 has a different profile — the spatial map is intact but integrating meaning into the retrieval process overloads the system. Also a different target.

Document which level the performance breaks down at and whether the breakdown is consistent or variable across questions at that level. Consistent failure at a level is a capacity ceiling. Variable failure is a load-sensitivity finding. They are not the same.

Why the grid content is a clinical decision

The images on the visual memory activity grid are semantically neutral (i.e., a barn, a tractor, roller skates). They carry no particular emotional weight and no prior spatial associations for most patients.

That is useful for baseline. It is not always the right tool for functional transfer.

👉 When your patient's functional goal is grocery shopping, replace the grid with twelve grocery items organized by department. When the goal is medication management, use the pill organizer layout as the grid. When the goal is home navigation, map their kitchen or bathroom.

The cognitive demand is identical. The transfer is direct. A patient who can hold and navigate a mental grid of grocery items organized by aisle is practicing the exact spatial working memory operation the store requires.

Document the grid content as a controlled variable. When you change the content, note it and expect a performance shift. New content requires new encoding and the working memory demand resets.

How to Treat This (Real Sessions)

🔵 Give adequate encoding time before the first question, every session. Do not rush the study phase. The quality of the mental image the patient builds during encoding determines everything that follows. A patient who was allowed thirty seconds to study the grid performs differently than one who was given ten. Time the encoding phase and keep it consistent session to session.

👉 Watch what the patient does during encoding. A patient who studies systematically (row by row, column by column) is building a more stable mental map than one who scans randomly. If the patient has no strategy, teach one. "Start at the top left. Go row by row." That instruction is a working memory scaffolding intervention. Document whether you gave it and whether it changed retrieval accuracy.

🃏 Cover the grid completely before moving to Level 2. Not partially, completely. Partial coverage invites visual scanning through peripheral vision and contaminates your working memory measure. Use a solid cover and place it deliberately. The patient should see you cover it. That transition is the cognitive signal that the task has changed.

🧠 When performance breaks down, do not immediately re-expose the grid. Ask the patient: "What do you remember about that area of the grid?" That retrieval attempt, even if incorrect, tells you whether the mental image exists in fragments or is simply inaccessible under pressure. Fragmented recall is a different finding from blank recall. Document which you observed.

⏱️ Add timed responses only after the patient is stable at a level for two sessions without timing. Timing increases the working memory load by adding processing speed pressure. It is a progression variable, not a default condition. When you add it, keep everything else identical and document the accuracy change. That delta is your processing-speed-under-load data.

📊 Track three numbers every session: highest level reached with grid visible, highest level reached with grid covered, and the level at which performance first broke down. They move independently and tell different stories.

Across Disciplines

PT: Administer Level 2 and above while the patient is standing, walking, or performing a balance task. The spatial working memory demand does not decrease, the postural load adds a dual-task cost that mirrors the cognitive-motor demand of navigating a real environment. A patient who answers Level 2 questions accurately while seated but fails while walking has a mobility-dependent working memory ceiling directly relevant to community ambulation.

SLP: Semantic retrieval at Level 3 is a language-memory integration task, the patient must hold the visual grid while processing a category-based verbal cue and searching the mental image for a match. For patients with word retrieval deficits or aphasia, Level 3 errors may reflect language access failure rather than working memory failure. Separate these by testing whether the patient can point to the correct image when the grid is briefly re-exposed. If they can point but not name, the map is intact and the deficit is retrieval, not storage.

👉 One grid. Four levels. Three disciplines worth of data.

Documentation

This is not a memory card game.

Identify and document:

• visual working memory: mental spatial map construction and stability, retrieval accuracy with grid absent by level, encoding strategy (systematic vs. random)
• spatial navigation under memory load: performance on spatial shift and relative position questions with grid covered, step count at which multi-step navigation failed
• semantic-spatial integration: accuracy on category-based retrieval requiring simultaneous maintenance of mental grid and semantic processing

👉 If you don't name it, it doesn't exist clinically.

📍 Describe where the breakdown occurs, specifically.

Don't write "patient had difficulty with memory activity."

Write what actually happened:

• accurate at Level 1 with grid visible (8/8); performance dropped to 3/8 at Level 2 with grid covered — encoding-to-retrieval gap identified; mental spatial map insufficient for navigation without visual reference
• Level 3 semantic retrieval: 5/8 correct with grid covered; errors clustered on multi-category items (pool/fishing both involve water); semantic overlap driving retrieval confusion, not spatial map failure
• Level 4 attempted; patient lost orientation after first spatial step on 6/8 questions; multi-step navigation ceiling identified at single-step spatial shift

👉 Each of these is a specific, measurable, functionally meaningful clinical finding.

🧾 Tie it to function. Every note. Every session.

• grocery shopping: holding store layout in mind while navigating aisles and managing a list simultaneously
• medication management: recalling which compartments have been opened without visual reference
• home navigation: locating items in familiar environments when the visual cue is not immediately available
• following multi-step directions: maintaining a mental map of the task sequence while executing each step

👉 This is not a grid activity.

👉 This is visual working memory training — spatial map construction, mental navigation, and semantic retrieval under memory load — with a direct, nameable line to the community mobility and functional independence deficits this patient named on day one.

Author Information:

Michelle Eliason, MS, OTR/L
Occupational Therapist & Functional Cognition Educator

Owner, Buffalo Occupational Therapy
PhD Candidate, Rehabilitation Science

Founder of BOT Portal — a clinical system for real-world cognition

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Handout 1: 3X4 Visual Memory Grid

3x4 Visual Memory Grid

Handout 2:  Visual Working Memory Grading Guide

Use this to decide which level to start at, when to cover the grid, and when to advance. The most important column is the breakdown level; the number you are progressing across this plan of care.

Clinical tip: If a patient fails Level 2 consistently but passes Level 1, do not advance. Spend two sessions at Level 2 before introducing Level 3. Advancing before stability means you cannot tell whether Level 3 failure is a Level 3 problem or a Level 2 problem that was never resolved.

Visual Working Memory Grading Guide

One-Line Clinical Reasoning Starters

Visual working memory deficit identified

• accurate spatial recall with grid visible, performance breakdown at Level [2/3/4] with grid covered 
• encoding-to-retrieval gap documented; skilled spatial map training required to build stable mental representation for functional navigation.

Semantic-spatial integration failure at Level 3

• patient maintains grid position data but cannot integrate category-based cues during retrieval 
• skilled intervention required to train simultaneous maintenance of visual map and semantic processing under memory load.

Multi-step spatial navigation ceiling identified at [single/two-step] spatial shift

• mental map collapses under sequential navigation demand 
• direct functional correlate for community ambulation, grocery navigation, and multi-step ADL sequencing.

Visual working memory performance declined in dual-task condition

• [walking / standing / motor task added] 
• postural-cognitive working memory ceiling documented; skilled grading of task complexity required before advancing to community-level functional demands.

Grid content transitioned to [grocery / medication / household] items

• performance shift documented as [expected recalibration / unexpected regression] 
• functional transfer training active; skilled facilitation required to build stable mental map at new content level.

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