The Interstitial Journal blog
Built on evidence, not hype.
Short, evidence-based reads on attention, task-switching, and journaling — what the research actually supports, and where it runs out. New here? Start with the complete guide to interstitial journaling.
Why Journaling Habits Die at the Capture Step
Researchers hid a sensor in a paper diary and found people were filling it in on time about a tenth as often as they sincerely believed. The failure is not motivation, it is the few seconds at the seam — and the Sunday catch-up that repairs the gap quietly converts a journal into the thing it was meant to replace.
Read →What a Mood Tag Is, and What It Isn't
Naming a feeling has real experimental support — and it works without you expecting it to, which makes your own sense of whether it helped a useless test. Almost none of that evidence is about the chart afterwards. Why the words beside the tag are the part doing the work, and where a week of tags stops meaning anything.
Read →Version 1.1: One Design, Every Screen
A full visual pass across iPhone, iPad, and Mac: one violet accent, calmer type, a comfortable reading column on big screens. Insights rebuilt around three questions — how much, when, and where your attention goes — and the running task now stays in step across every device.
Read →Journaling and Sleep
"Write it down before bed" is given without a mechanism or a direction. One polysomnography study compared writing the to-do list against the done list — and the intuitive ritual is the arm that did worse. What pre-sleep writing can do, why earlier beats later, and where this stops being about journaling at all.
Read →What to Keep and What to Delete
Hundreds of saved articles, none re-read, all apparently your fault. But saving was never the operation doing the work. What generation, retrieval and desirable difficulties actually support — including the handwriting study that later failed to replicate — and the permission most notes advice won't give you.
Read →The Ten Seconds Between Meetings
Six meetings is six units of work plus five transitions — and the transitions are the part nobody schedules. What switch costs and attention residue do to a back-to-back day, and the one line that fits in the gap you don't have. Graded Early to Strong.
Read →What to Write When Nothing Happened
Recall is built from peaks and endings, not from duration — so an ordinary Tuesday compresses to nothing and the blank page feels justified. Why "nothing happened" is a retrieval problem, plus eleven narrow prompts for a flat day. Graded Early to Strong.
Read →The Planning Fallacy: Why "Twenty Minutes" Is Never Twenty Minutes
We reliably underestimate how long our own tasks will take — even when we remember the last one running long. Why the fix is an outside view, and how a timestamped log builds a personal reference class. Graded Early to Strong.
Read →The Zeigarnik Effect: Why Unfinished Tasks Keep Tapping You
Unfinished tasks linger in the mind — but the research suggests it isn't finishing that quiets the loop, it's writing down the next step. The evidence behind the interstitial line. Graded Contested to Strong.
Read →Interstitial vs. End-of-Day Journaling: Which Fits the Workday?
Capturing notes between tasks and reflecting once at day's end lean on different research and do different jobs — continuity versus learning. An evidence-based comparison, and why the two stack. Graded Strong to Contested.
Read →The Hidden Cost of Task-Switching — and How a Pause Helps
Switch costs and attention residue make jumping between tasks more expensive than it feels. What the research actually shows — and why a brief note at the boundary is a reasonable response. Graded Strong to Contested.
Read →Work-Journal Prompts for the Gaps Between Tasks
A small set of prompts for the seams between tasks — starting, switching, getting stuck, finishing. Each one tied to the research it leans on, and graded against the evidence.
Read →Attention Residue and the Evidence-Based Case for Interstitial Journaling
Attention residue is the part of your focus that stays stuck on the last task. One experiment shows a brief "ready-to-resume" note helps it clear — here's the evidence, and where it ends.
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