Hidden Brain engagement report
@HiddenBrain - 123K followers on X
Measured over 31 original posts from a 30-day window, last computed on October 4, 2026.
Engagement
A typical post picks up 17 interactions against 123K followers, an engagement rate of 0.014%. Measured over 31 original posts, its engagement rate beats 23% of 21,185 tracked accounts of a similar size. That is a reason to look at how the audience behaves - reply depth, saves, whether the followers are recent - rather than a conclusion about it on its own. Posts are seen about 3.2K times each, and 0.532% of those impressions turn into an interaction. That is about 2.60% of the follower count, which is the gap between an audience on paper and an audience in a timeline. Posting runs at about 1.9 posts a day over the last 30 days, with activity on roughly 67% of days. Most posts go out around 21:00 UTC, and Tuesday is the busiest day of the week. Of the 31 posts sampled, 26% carry an image or video, 13% are part of a thread and 42% link out. The account's strongest tracked post pulled 316 interactions, about 19x its own typical post.
Measured over 31 original posts from a 30-day window, last computed on October 4, 2026.
Compared with accounts its own size
Hidden Brain's engagement rate beats 23% of the tracked X accounts closest to it in follower count (21,185 accounts, accounts of similar size (decile 8 of 10)). A percentile is spread evenly by construction, so 50 really is the middle of that group and 90 really is its top tenth.
On engagement per impression rather than per follower it beats 26% of the same group. When those two numbers disagree, the gap is about how far its posts travel rather than how people react to them.
Where this sits in the catalog
At 0.014%, Hidden Brain sits above the 10th percentile of the 213,004 accounts in this comparison. That places it in the bottom 25% band, which runs below 0.025%.
Show the percentile table
| Percentile | Engagement rate |
|---|---|
| 10th percentile | 0.004% |
| 25th percentile | 0.025% |
| 50th percentile | 0.147% |
| 75th percentile | 0.698% |
| 90th percentile | 2.61% |
| 99th percentile | 82.8% |
This ruler is the whole measured catalog, not a size-matched group: it shows where the raw rate falls across every account we can measure, all of which are large. For a like-for-like comparison, read the size-band percentile above instead. See how the bands are built
Posting timing
This account posts most often around 21:00 UTC, and Tuesday is its busiest day of the week. The bars below are the catalog-wide pattern, with this account's own busiest slot marked. They do not show how this account performs at each hour: we keep one aggregate per account, not one per hour, so that measurement does not exist in our data.
Show engagement by hour posted, utc as a table
| Hour (UTC) | Vs author median | Posts |
|---|---|---|
| 00:00 UTC | -1% | 89K |
| 01:00 UTC | -2% | 90K |
| 02:00 UTC | -3% | 88K |
| 03:00 UTC | -4% | 94K |
| 04:00 UTC | -5% | 76K |
| 05:00 UTC | -4% | 75K |
| 06:00 UTC | -5% | 86K |
| 07:00 UTC | -5% | 93K |
| 08:00 UTC | -4% | 108K |
| 09:00 UTC | -4% | 124K |
| 10:00 UTC | -3% | 129K |
| 11:00 UTC | -3% | 141K |
| 12:00 UTC | -3% | 154K |
| 13:00 UTC | -3% | 167K |
| 14:00 UTC | -4% | 173K |
| 15:00 UTC | -2% | 176K |
| 16:00 UTC | -3% | 171K |
| 17:00 UTC | -3% | 159K |
| 18:00 UTC | -2% | 149K |
| 19:00 UTC | -2% | 141K |
| 20:00 UTC | -1% | 131K |
| 21:00 UTC | 0% | 116K |
| 22:00 UTC | -2% | 100K |
| 23:00 UTC | -1% | 90K |
Show engagement by day of week as a table
| Day | Vs author median | Posts |
|---|---|---|
| Sunday | +5% | 393K |
| Monday | +1% | 483K |
| Tuesday | -2% | 520K |
| Wednesday | -3% | 472K |
| Thursday | -2% | 430K |
| Friday | -3% | 447K |
| Saturday | +2% | 393K |
Formats this account uses
Its own posting mix on the left, and what each of those formats does across every account we track on the right. Only formats where the effect clears our publish test appear here, so an empty row is a format we could not measure rather than one that does nothing.
| Format | This account | Catalog effect | 95% interval | Accounts behind it |
|---|---|---|---|---|
| Image or video | 26% of posts | +111% | +108% to +115% | 34K |
| Outbound link | 42% of posts | -41% | -42% to -40% | 32K |
| Typical length | - | +15% | +14% to +16% | 32K |
- 26% of this account's sampled posts carry an image or video. Across the catalog, posts with an image or video run 111% above the same accounts' other posts.
- 42% of its posts carry a link off X. Across the catalog, posts with an outbound link run 41% below the same accounts' other posts, so a large share of this account's output sits in the weakest bucket we measure.
- Its average post runs 311 characters, which falls in the over 280 characters band. Across the catalog, posts over 280 characters run 15% above the same accounts' other posts.
These are catalog-wide differences applied to this account's own posting mix, not a measurement of how each format performs for this account specifically. We keep one median per account, not one per format per account, so the second thing is not something this data can tell you.
Best tweets
- Oct 29, 202119x their median
New to Hidden Brain? Here's a great place to start. https://t.co/eOBF1ShjDE
- Sep 15, 20264.0x their median
When psychologist Gordon Flett was hospitalized with liver failure, a nurse sat with him for hours in the dark. She didn't just check on him. She talked to him, like he was a person and not just a patient in a bed. That experience shaped Flett's research for years afterward. Now a psychologist at York University, he's spent his career studying what he calls mattering: the felt sense that you're noticed and significant to the people around you. When that feeling is missing, Flett's research links it to depression and loneliness, and in extreme cases, to violence. Some researchers who study school shooters have found loneliness and alienation running through many of their histories, along with a grim pattern: when every ordinary path to feeling significant seemed closed off, a few chose infamy instead. But the need to matter is universal, and meeting it doesn't have to be complicated. Sometimes the simplest thing you can do for another person is let them know you see them.
- Sep 2, 20262.6x their median
Extreme altruists are willing to give a kidney to a stranger they'll never meet. Psychopaths can look right at your pain and not recognize it. And the difference between these two types of people is reflected in the size of one tiny part of the brain. 🧵
- Sep 26, 20262.2x their median
Left alone, the mind grabs the quickest, most satisfying story and calls it the truth. Tania Lombrozo's research points to a handful of habits that help you to resist that impulse: argue the other side, explain things in plain language, trace your beliefs to their evidence, and be suspicious of the explanation that feels best. None of these techniques are automatic. That's the work.
- Sep 21, 20261.8x their median
For thousands of years of human history, marrying for love would have sounded absurd. Marriage was about survival, land, and political alliances. The idea that love should be the point of marriage is only a few hundred years old. 🧵
- Sep 18, 20261.8x their median
In a famous experiment, a capuchin monkey happily performs a task for a cucumber. Then it sees another monkey doing the same task and getting a grape. The first monkey throws the cucumber back at the researcher. It's been 40 million years since humans shared an ancestor with capuchin monkeys. But we're both wired for fairness. 🧵
- Sep 29, 20261.6x their median
Do you believe that being perfect is how you get ahead? That belief may actually be holding you back. Many of us try to perfect what we're already good at. We overlook or ignore other things that could change our lives. 🧵
- Sep 21, 20261.6x their median
Why is it harder to think clearly when you're in the presence of someone who intimidates you? Cornell psychologist Vanessa Bohns has spent her career studying the hidden influence we exert on others.
- Sep 5, 20261.6x their median
What do heroin, alcohol, and your phone have in common? Psychiatrist Anna Lembke calls your phone the modern hypodermic needle. Every scroll delivers a dopamine hit, and your brain pushes back each time you chase it. https://t.co/IUL1eyGM3n
- Sep 29, 2026
“You can't treat your automatic thoughts as if they were true.” Last week, psychologist Martin Seligman explored why some people come to believe that their actions don’t matter. This week, he explains how we can strengthen our sense of agency and learn to see new possibilities. He offers practical strategies for building confidence in our ability to shape what happens next. https://t.co/IMNSJUd3Y8
Ranked by total interactions across everything we have tracked for this account, which is a longer history than the 30-day window the rates above use. The multiple compares each post to this account's own median.
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Reading these numbers
A typical post picks up 17 interactions against 123K followers, an engagement rate of 0.014%. Measured over 31 original posts, its engagement rate beats 23% of 21,185 tracked accounts of a similar size. That is a reason to look at how the audience behaves - reply depth, saves, whether the followers are recent - rather than a conclusion about it on its own. Posts are seen about 3.2K times each, and 0.532% of those impressions turn into an interaction. That is about 2.60% of the follower count, which is the gap between an audience on paper and an audience in a timeline. Posting runs at about 1.9 posts a day over the last 30 days, with activity on roughly 67% of days. Most posts go out around 21:00 UTC, and Tuesday is the busiest day of the week. Of the 31 posts sampled, 26% carry an image or video, 13% are part of a thread and 42% link out. The account's strongest tracked post pulled 316 interactions, about 19x its own typical post.
- What is Hidden Brain's engagement rate on X?
- Hidden Brain (@HiddenBrain) has an engagement rate of 0.014%, based on the median interactions across 31 original posts from the last 30 days against 122,786 followers. Replies, reposts and quote-posts of other people are excluded from that sample.
- Is that a good engagement rate?
- At 0.014%, Hidden Brain sits above the 10th percentile of the 213,004 accounts in this comparison. Those comparison accounts are all large ones, because our scanning cadence is weighted towards big accounts, so this is a ranking among peers of similar scale rather than a ranking across X.
- Does @HiddenBrain have real engagement?
- Its engagement rate beats 23% of the tracked X accounts closest to it in follower count (21,185 accounts), which puts it in the bottom quarter for its size group. Ranking inside a size band matters because engagement rate falls as accounts grow, so a raw rate would mostly re-measure the follower count. It is a starting point for a look at follower quality, not a verdict on it.
- When does @HiddenBrain post?
- Most posts go out around 21:00 UTC, and Tuesday is its busiest day, at roughly 1.9 posts per day across the measured window.