What Aggregated Reviews Can Tell Us About King County Senior Housing
We collected 6,628 reviews across 791 King County senior housing facilities from multiple platforms. The results are inconsistent, which really matters if you're trying to pick a facility for a family member. You may only see one side of the coin without all of the information being presented.
The same facility, different scores
Here are King County facilities with the largest rating gap between our two largest review platforms (normalized to a 0-5 scale):
| Facility | Platform A | Platform B | Gap |
|---|---|---|---|
| Brookdale Renton | 5.0 (5 reviews) | 2.78 (16 reviews) | 2.22 |
| Fred Lind Manor | 5.0 (5 reviews) | 2.83 (6 reviews) | 2.17 |
| Brookdale Federal Way | 1.8 (5 reviews) | 3.72 (30 reviews) | 1.92 |
| Eldorado West Retirement Community | 4.6 (5 reviews) | 3.12 (26 reviews) | 1.48 |
| Expressions at Enumclaw | 5.0 (5 reviews) | 3.60 (10 reviews) | 1.40 |
Brookdale Renton is a perfect 5.0 on one platform and a 2.78 on another. That's the difference between "excellent" and "below average" depending on where you look.
This isn't unusual. Each platform attracts a different audience with different motivations for writing reviews. One platform might skew toward people who toured but never moved in. Another attracts family members who have loved ones living in the community. The ratings reflect those different populations, not objective quality differences.
Most facilities only have one source
Of the 791 King County facilities with at least 1 review, 688 have reviews from a single platform. Only 103 have data from two sources. If you're checking one review site, you're seeing the only data point that exists for most facilities.
For the 103 facilities with multi-source data, the average total review count jumps to 34.6 reviews. Single-source facilities average 4.5 reviews. More sources means more data, which means a more reliable picture.
The small-sample problem
Ten King County facilities have a perfect 5.0 rating with 5 or fewer reviews. That looks great until you think about what it means statistically. One or two positive reviews from family members who had a good experience can produce a perfect score.
We use Bayesian adjustment to correct for this. The idea is simple: a 5.0 from 2 reviews should not carry the same weight as a 4.5 from 50 reviews. Bayesian adjustment pulls low-count ratings toward the county average, so a facility needs enough volume for its rating to stand on its own. The more reviews a facility has, the less the adjustment matters.
After adjustment, those perfect-5.0-from-2-reviews facilities settle into more realistic territory. Meanwhile, a facility like Eldorado West with 31 total reviews across platforms keeps a score that's closer to its raw average because the sample is large enough to be meaningful.
What we do with this
Our review score for each facility aggregates across all available platforms with equal weighting per source. A facility's rating on one platform counts the same as its rating on another. This prevents high-volume platforms from drowning out smaller ones.
Combined with the Bayesian adjustment, this produces review scores that reflect actual consensus rather than whichever platform you happened to check first.
In the previous post, we scored inspection reports. Reviews are the second input to our composite facility score. Next: what Secretary of State filings reveal about who actually owns these facilities.