Two records of the same Tuesday. One is a paragraph you wrote last thing, half asleep. The other is four panels with about fifteen words in them.
A year on, the paragraph gives you a sentence you don’t remember writing and no picture of anything. The four panels put you back in the room. There are reasons for that, and they aren’t about one being more effort than the other.
A picture gets filed twice
The picture superiority effect is one of the more solid findings in memory research: images are recognised and recalled better than words, consistently, across a lot of different experimental setups.
The scale of it surprises people. In one much-cited study from the early 1970s, participants were shown thousands of photographs, once each, and were still able to pick them out of pairs afterwards with high accuracy. Nobody performs like that on a list of sentences.
The standard explanation is dual coding: a picture gets encoded both as an image and as a verbal label, so there are two routes to it later, while a written sentence mostly gets the one. Two ways in means two ways back out, and either can do the job when the other fails.
Comics get both channels by construction
Which is where the format has an unfair advantage over both prose and photographs.
A panel is a picture with words attached, so it’s dual-coded on purpose rather than by luck. The drawing carries the moment and the caption carries what it meant, and neither has to do the whole job alone. A photograph has the image and no interiority. A paragraph has the interiority and no image. A panel is the only common format that routinely holds both in the same object, at the same second of the same day.
That’s also why a caption on a photo works so much better than either half, and why the people who keep photo albums with proper captions end up with far better records than the people who keep thousands of uncaptioned pictures.
Every panel has to be somewhere
Location is one of the strongest retrieval cues going. Memory systems built for competition, the ones where people memorise decks of cards, all work by placing things in imagined rooms, and they’ve worked that way since antiquity because spatial memory outperforms almost everything else available.
A panel cannot avoid being somewhere. You have to draw a background, even a lazy one, so every entry gets a location stapled to it whether you were thinking about that or not. Prose has no such requirement, and a written diary entry very often doesn’t say where anything happened, because you knew at the time and it seemed too obvious to write down.
Fifteen years later, the room is the thing that brings the day back and the adjective isn’t.
The reader has to fill in the gaps
The third one is structural, and Scott McCloud named it closure: what happens between two panels never appears on the page, and the reader supplies it.
Panel two shows the mug at the edge of the table. Panel three shows the floor. Nobody drew it falling. You did that, in your head, at no cost and without noticing.
That matters for memory because material you generate yourself is retained better than material handed to you complete. A comic makes the reader do a small piece of work at every gutter, which is why a strip you read in four seconds sticks better than a paragraph you read in fifteen. The gaps aren’t a limitation of the form being worked around. They’re where the reader gets involved.
Where prose wins outright
The trade is real and it runs the other way here.
Prose holds nuance, causation and argument. Anything with a “because” in it, anything you’re working out as you write, anything abstract, anything where the exact words are the point: a comic can’t carry those and shouldn’t try. Four panels cannot hold “I think I was unhappy for reasons that had nothing to do with the job.”
So a comic diary is the better record of what happened, and a written one is the better record of what you thought. If what you want back in ten years is your reasoning, write it down in sentences and don’t let anybody talk you out of it.
Most people, though, find their reasoning from that far back embarrassing and their Tuesdays fascinating, and that settles the question of which format to default to.
The practical version
Three things to do differently if you want a strip to hold a day.
Draw the place, even badly. The corner of the sink, the shape of the window, the pattern on the chair. That’s the retrieval cue and it’s nearly free.
Keep words as quotes. What somebody said, in their words, beats your summary of the conversation every time.
One specific object per panel. The particular mug, the particular envelope. A generic kitchen brings back nothing, because it isn’t anywhere.