The One Feng Shui Trial Tested One Branch of Five

A piece went out this morning on 95.5 WSB, syndicated through Stacker, asking whether feng shui lowers stress and walking through the research on clutter. It is more careful than most coverage of this subject: it separates the organizing advice from the claims about luck, prosperity and health, and it says plainly that the second group is belief rather than finding. It gathers seven studies, and the center of it is the one randomized controlled trial that feng shui has.

We went and read that trial, because a single-line summary of a mediation analysis is where this kind of story usually goes wrong. It did go wrong, in a small way and in the tradition's favor — we will come to that. But the thing worth a whole post is a sentence in the paper's own limitations list that no coverage of it has repeated, and that changes what the trial can be cited for.

One trial, and it tested one branch of five

The study is Zijlstra and colleagues, published in PLOS ONE on June 5, 2024. Four arms, randomized evenly: a control room that was a digital twin of a real Dutch single-bed inpatient room, a Golden Ratio room, a feng shui room, and an evidence-based design room. 558 adults who had previously been hospitalized in the Netherlands were assigned one of the four, between June 24 and August 22, 2022, recruited through the Dutch Patient Federation. Each saw a two-minute video, images, a floor plan and a written description, delivered through a survey tool. Anxiety was measured with the six-item STAI.

It is worth being exact about the format, because it gets described as virtual reality and it was not. There was no headset and no room. These were people looking at a rendering of a hospital room on their own screen, and answering questions about it. The authors list that themselves: participants never experienced the room, and a visual simulation cannot convey control over lighting, temperature or a television. The audio environment was left out entirely, which the authors note is awkward given that noise reduction is central to the evidence-based design case.

And then this, from the same list: only the feng shui Form School was tested, and the other schools were excluded.

That single line is the most useful thing in the paper for anybody deciding what the trial proves. Feng shui is not one method. The Form School reads the shape of a place — where the door is, what sits at your back, whether the path through a room is clear, what you can see from the bed. Eight Mansions reads a person's Kua number against eight compass sectors. Flying Stars reads a building's facing in degrees against the period it was built in. Date selection reads a date. The I Ching sits underneath all of them. The trial tested the first and excluded the rest, and so the sentence "a randomized trial of feng shui" is doing more work than the study will bear.

What it actually found, which is not quite what was reported

The roundup says the feng shui room was not directly associated with lower anxiety. That is true, and it is the part most summaries stop at. The paper's result is a little better than that for the tradition, and the shape of it matters more than the direction.

No arm had a direct effect on anxiety — not feng shui, not evidence-based design, not the Golden Ratio. The regression found nothing. What the authors then tested was mediation: whether a condition moved anxiety by way of something else it moved first. Two pathways came out significant. For the feng shui room, the indirect effect through how pleasant the room was rated came to B = −0.85, and the indirect effect through social support to B = −0.33. Both intervals excluded zero. Two other candidate pathways, sense of control and positive distraction, mediated nothing in either arm.

Read plainly, that says the feng shui room reduced anxiety by being a nicer room to sit in and an easier room to receive a visitor in. That is a real finding and it is not nothing. It is also a mechanism anybody can state without the tradition, and it is the mechanism the tradition is least distinctive about.

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designing a patient room according to FS and EBD principles can create a more pleasant room to reduce anxiety

The comparison in the same trial is the part to sit with. Evidence-based design — which is not a tradition at all, just design decisions that have citations behind them — was the only arm with an overall effect on anxiety, B = −1.47. It ran through the same two pathways as the feng shui arm and further along both: −1.26 through pleasantness against −0.85, and −0.50 through social support against −0.33. The feng shui arm had no overall effect.

So the one head-to-head anybody has run says this: on the tradition's own most testable branch, a modern design methodology did more, through the same two mechanisms. We would rather print that than not. A site that only passes on the research flattering to its subject is running an advertisement.

The Golden Ratio arm is what makes the rest of it credible

A trial in which every arm works is usually a trial measuring enthusiasm. This one had an arm that did nothing at all. The Golden Ratio room produced no effect on anxiety and no effect on any other outcome the study measured; the abstract says it remains a myth.

That is the most reassuring sentence in the paper, and no coverage of it we found mentioned the arm. It means the instrument was capable of returning a null and did return one. Whatever the feng shui and evidence-based design pathways are, they are not an artifact of four groups of people being asked to admire four rooms. The null arm is why the two mediated effects are worth more than they look.

The disclosure deserves the same even-handedness. One co-author is affiliated with the International Feng Shui Association in Singapore, and two others with a design studio; the paper discloses this and states that they supplied the design details for the feng shui and evidence-based rooms and had no part in the methodology, the data collection, the analysis or the conclusions. That is how a conflict is supposed to be handled. It is also the right way round: somebody had to specify a genuine Form School room, or the arm would have tested a guess at one. You want a practitioner designing the practitioner's arm, and you want their name in the competing-interests statement. Both happened.

The house numbers are a study of belief, not of qi

The last study in the roundup is the Vancouver one, and it is the one most often misread. Fortin, Hill and Huang looked at roughly 117,000 Greater Vancouver sales from January 2000 to May 2005. In neighborhoods where the share of Chinese residents ran above the Greater Vancouver average of 18%, a house whose address ended in 4 sold at a 2.2% discount, and one ending in 8 at a 2.5% premium.

The effect is real, it is sizeable, and it is not a feng shui finding. The word for four, si, sounds like the word for death, and the word for eight, ba, sounds like fa, to prosper: these are homophones, folk numerology carried by the sound of a word. No compass sector, no star chart, no trigram, no date. They are not in Eight Mansions and they are not in Flying Stars, and this site's calculators have nothing to say about the digits on a door.

What the study measures, and measures carefully, is what people will pay to act on a belief. That is a fact about buyers, and a well-established one. It is not evidence that the number does anything, and the two readings get run together constantly — including, usually, by people arguing in the tradition's favor. A price premium is a measurement of how many people hold a belief and how expensively, which is exactly as interesting as it sounds and no more.

One more thing about it, since the roundup does not say: the data is from 2000 to 2005. Those are twenty-year-old transactions appearing undated in a 2026 article.

Our honest read, including about us

The source gets credit for the thing most pieces on this subject get wrong. It separates the advice from the promises, it says the health and prosperity claims are not established, and it declines to assert a mechanism it does not have. That is more discipline than the genre usually shows. A reader should still know who published it: it is branded content written for a closet-organizing company and distributed by Stacker, and its conclusion — that clear floors and fewer visible objects are reasonable goals on their own — is both correct and convenient. We think it is correct. We also think the byline belongs next to it.

The sharper point is the one the paper's limitations list hands us. For about a year this trial has been the thing people reach for when they want feng shui to have an evidence base, and it does support something: a Form School room was rated more pleasant, and that pleasantness carried a measurable reduction in anxiety. What it does not touch is the compass. Every citation of it as "a randomized trial of feng shui" is quietly borrowing credit from one branch to cover four, and that is the same move as the house-number study being read as evidence about numbers rather than about buyers.

Which lands on us, so we will say it without being asked. This site computes Eight Mansions directions, two Flying Star charts and a daily almanac, and it shows the derivation for all of them — the rules are in the open, each one stated in a line and checked by a test, and where a chart depends on data we do not have we warn instead of guessing. That is a claim about arithmetic. It says that when we print a chart, it is the real chart, derived the way the tradition derives it. It is not a claim that the chart changes anything, and no trial has ever been run that would let us make the second claim.

We have never promised otherwise and this is a good morning to repeat it. The one honest sentence available about the compass branches is that they are an internally consistent system, several centuries old, that nobody has yet put in front of a control group. If that trial is ever run we will publish the result whichever way it goes — and on today's evidence, the arm to beat is not the Golden Ratio.