Hi, thanks for your interest in how we calculate an experience's ranking score. It's at the core of Rankers so I'm pleased you're curious.
The ranking score percentage is used to compare and sort experiences in ranking tables. It is not necessarily a direct measurement of the quality of a particular experience as rated by its customers. I've found it a useful tool to allow me to find the best experiences with confidence. But I've also found it important to read the customer reviews before making any final judgements!
We calculate an experience's ranking score using a multi-factor data model instead of a raw data average (mean). This model takes into account several important questions. For instance - is there a trusted body of reviews? What is the age of a review and is the review from a credible source?
Below you'll find details around some of the important factors that went into calculating the ranking score for Te Anau Glowworm Caves.
If you have any questions or comments about our ranking score calculation please get in touch at info@rankers.co.nz. We don't believe this is perfect or complete so we're always interested in ways we might make improvements.
Te Anau Glowworm Caves
Valid Reviews
190 Valid Reviews
The Te Anau Glowworm Caves experience has a total of 191 reviews. There are 190 valid reviews that are included when calculating the ranking score and 1 invalid review that are excluded from the calculation. Reviews can be excluded only when a reviewer is not verified or after an investigation by our team determines the reviewer is not genuine.
Below is the distribution of ratings for the 190 valid reviews:
| Rating | Count | Percentage | |
|---|---|---|---|
| 10/10 | 49 |
|
26% |
| 9/10 | 43 |
|
23% |
| 8/10 | 41 |
|
22% |
| 7/10 | 34 |
|
18% |
| 6/10 | 9 |
|
5% |
| 5/10 | 8 |
|
4% |
| 4/10 | 5 |
|
3% |
| 3/10 | 0 |
|
0% |
| 2/10 | 1 |
|
1% |
| 1/10 | 0 |
|
0% |
82.05% Average
The raw data average (mean) for all the Te Anau Glowworm Caves valid reviews is 82.05% and is based on 190 valid reviews. This value is not used to calculate the ranking score and it only provided here as a comparison to the weighted average.
Face-to-Face Reviews
176 Face-to-Face Reviews
The Rankers team meets with travellers while they’re in New Zealand and conducts face-to-face surveys. These reviews, in our opinion, are the most trusted in the industry and represent a critical control sample. To our knowledge, we are the only travel review website in the world that has gone to this extent.
More about face-to-face reviews
Within the 190 valid reviews, the experience has 176 face-to-face reviews collected during interviews by our team.
Below is the distribution of ratings for the 176 face-to-face reviews:
| Rating | Count | Percentage | |
|---|---|---|---|
| 10/10 | 45 |
|
26% |
| 9/10 | 39 |
|
22% |
| 8/10 | 38 |
|
22% |
| 7/10 | 34 |
|
19% |
| 6/10 | 8 |
|
5% |
| 5/10 | 8 |
|
5% |
| 4/10 | 3 |
|
2% |
| 3/10 | 0 |
|
0% |
| 2/10 | 1 |
|
1% |
| 1/10 | 0 |
|
0% |
82.10% Average
The raw data average (mean) for all the Te Anau Glowworm Caves face-to-face reviews is 82.10% and is based on 176 face-to-face reviews. This value is not used to calculate the ranking score and it only provided here for comparison purposes.
Weighted Average
83.53%
Rankers calculates a weighted mean as a base average on which we can improve. Individual review's ratings are given a weight based on several factors. The weight of a review determines the overall impact it'll have on the final weighted average.
Recent reviews have more weight as they are more relevant and reflect the experience as it currently operates. Over time reviews become less relevant and loose their impact on the ranking score.
Low rating reviews carry slightly less weight. This dampens the effect of very low ratings for every experience across the board. This is especially important when the experience has few reviews overall and a single negative rating can grossly mischaracterise an experience. Consistent poor reviews will still result in the experience receiving a comparitively low ranking score.
Credible sources provide reviews that can be trusted. If we have verified a reviewer is genuine via a face-to-face meeting then the review carries additional weight.
| Reviewer | Rating | Age | Relative Weight |
|---|---|---|---|
| Dorothy and Graham Glen | 9/10 | 3180 days | 100% |
| Dan Coates | 9/10 | 3413 days | 78% |
| Dominik | 9/10 | 3413 days | 78% |
| Holloway | 10/10 | 3436 days | 76% |
| Christina | 6/10 | 3504 days | 58% |
| Barbara Knops | 9/10 | 3506 days | 69% |
| Manu Liberta | 10/10 | 3516 days | 69% |
| Bruno | 9/10 | 3526 days | 67% |
| Kirsty Smith | 10/10 | 3549 days | 65% |
| Sophia Satter | 8/10 | 3560 days | 63% |
| Afiya Levy | 10/10 | 3781 days | 43% |
| Johannes Eisel | 6/10 | 3790 days | 34% |
| Alexander Mattea | 5/10 | 3790 days | 28% |
| Timea Bagosi | 9/10 | 3793 days | 41% |
| Riviere | 8/10 | 3804 days | 40% |
| Dani | 8/10 | 3806 days | 39% |
| Benoit Leclerc | 7/10 | 3808 days | 36% |
| Anna Stoehr | 10/10 | 3826 days | 38% |
| Kai Krchmar | 6/10 | 3879 days | 27% |
| Kristina Farkas | 5/10 | 4174 days | 0% |
| Sophia Kadel | 10/10 | 4204 days | 2% |
| Laura and Marie | 7/10 | 4210 days | 0% |
| Rachel S | 10/10 | 4218 days | 0% |
| Joris Giullemot | 8/10 | 4526 days | 33% |
| Laura Metz | 7/10 | 4537 days | 31% |
| Hubertus Thost | 7/10 | 4537 days | 31% |
| Amanda | 4/10 | 4552 days | 17% |
| S B | 10/10 | 4565 days | 34% |
| M K | 10/10 | 4565 days | 34% |
| Maya Bakker-deDreu | 8/10 | 4573 days | 33% |
| Christin Woelk | 9/10 | 4853 days | 34% |
| Maria Klister | 7/10 | 4873 days | 31% |
| Lydia Kleinkoenen | 9/10 | 4893 days | 34% |
| Jessica Grewe | 9/10 | 4893 days | 34% |
| Hannah Lia-Isis Kubillus | 9/10 | 4893 days | 34% |
| Jan Zimmerman | 8/10 | 4904 days | 33% |
| Margaret and Derek McNeil | 10/10 | 4964 days | 34% |
| Frank and Suzanne | 8/10 | 4979 days | 33% |
| RollingMoon | 8/10 | 5040 days | 33% |
| Marcel & Kim Meichtry | 7/10 | 5260 days | 31% |
| Howell Davies | 5/10 | 5263 days | 23% |
| Baas | 7/10 | 5263 days | 31% |
| Pete & Pat Etheridge | 8/10 | 5263 days | 33% |
| Siegfried Richter | 7/10 | 5264 days | 31% |
| Melanie Mathiak | 10/10 | 5266 days | 34% |
| Sig Schrattner | 8/10 | 5266 days | 33% |
| Rebecca Doehl | 7/10 | 5267 days | 31% |
| Seth & Carla | 7/10 | 5268 days | 31% |
| Gabriele Wendt | 9/10 | 5268 days | 34% |
| Tadej Ferjan | 8/10 | 5268 days | 33% |
| Mary Mitchell | 10/10 | 5268 days | 34% |
| Emily Wikston | 9/10 | 5269 days | 34% |
| Andreas & Leonie Fehr | 10/10 | 5275 days | 34% |
| Horst Langstein | 9/10 | 5276 days | 34% |
| Marco Scheiber | 9/10 | 5277 days | 34% |
| Friedrich Kaltner | 10/10 | 5279 days | 34% |
| Frank & Julia | 10/10 | 5282 days | 34% |
| Thyg Lingdal | 10/10 | 5282 days | 34% |
| Nicole van Bergen | 8/10 | 5282 days | 33% |
| Mike & April Prince | 7/10 | 5296 days | 31% |
| Alfred & Henrike | 8/10 | 5308 days | 33% |
| Lyn Stainton | 6/10 | 5357 days | 27% |
| Ken Talan | 10/10 | 5585 days | 34% |
| Jon_and_Family | 9/10 | 5589 days | 34% |
| Gertz | 10/10 | 5593 days | 34% |
| Katarina Bokor | 8/10 | 5597 days | 33% |
| Mark Franklin | 6/10 | 5597 days | 27% |
| Gordon Agent | 10/10 | 5597 days | 34% |
| Maureen Hardy | 8/10 | 5597 days | 33% |
| AJ van Pelt | 8/10 | 5597 days | 33% |
| Werner and Rita | 9/10 | 5604 days | 34% |
| Richard Dudfield | 10/10 | 5606 days | 34% |
| Sayaka | 7/10 | 5606 days | 31% |
| Urs and Isabella | 7/10 | 5607 days | 31% |
| Juliane Kleiu | 10/10 | 5610 days | 34% |
| Linda Kremer | 9/10 | 5611 days | 34% |
| Rebecca Johnston | 9/10 | 5611 days | 34% |
| David Mellard | 10/10 | 5612 days | 34% |
| Bruce & Elaine Chote | 10/10 | 5612 days | 34% |
| Paul Nickson | 8/10 | 5612 days | 33% |
| Monique | 8/10 | 5612 days | 33% |
| Beat & Connie | 10/10 | 5614 days | 34% |
| Alex Stil | 9/10 | 5614 days | 34% |
| Pein van Nosrt | 7/10 | 5619 days | 31% |
| Raith | 9/10 | 5619 days | 34% |
| Elise van Haastert | 8/10 | 5619 days | 33% |
| Claudia | 10/10 | 5621 days | 34% |
| Carolin Ranner | 6/10 | 5621 days | 27% |
| Winskowsky | 9/10 | 5622 days | 34% |
| Hvid | 9/10 | 5636 days | 34% |
| Judith K. | 6/10 | 5638 days | 27% |
| Ruben and Jetske | 7/10 | 5638 days | 31% |
| Roy Seymour | 9/10 | 5639 days | 34% |
| Tom Hill | 10/10 | 5643 days | 34% |
| Ruua Reyrink | 7/10 | 5644 days | 31% |
| Patrick Hugener | 9/10 | 5644 days | 34% |
| JohnHaestad | 4/10 | 5648 days | 17% |
| dollimyxture | 10/10 | 5679 days | 34% |
| aggiemary04 | 10/10 | 5771 days | 34% |
| victoriauk | 4/10 | 5893 days | 17% |
| Baumgarten | 8/10 | 5921 days | 33% |
| travelbunnyadventures | 8/10 | 5924 days | 33% |
| Don & Geraldine | 10/10 | 5960 days | 34% |
| Matthias & Ceristiane | 8/10 | 5972 days | 33% |
| Hilary and Chris Ayton | 9/10 | 5973 days | 34% |
| Lis & Rob Tate | 9/10 | 5975 days | 34% |
| ccthornton100 | 10/10 | 5985 days | 34% |
| Bob Kusesia | 10/10 | 5986 days | 34% |
| Yssel de Schepper | 7/10 | 5991 days | 31% |
| Janny Meerdinnk Veldboow | 7/10 | 5991 days | 31% |
| Arie Ascher | 9/10 | 5992 days | 34% |
| Wolfgang Engelke | 10/10 | 5994 days | 34% |
| Thomas K | 9/10 | 5994 days | 34% |
| Loleit | 7/10 | 6006 days | 31% |
| Mattias Thorm | 9/10 | 6007 days | 34% |
| Vincente Garrido | 4/10 | 6008 days | 17% |
| R Gilge | 10/10 | 6009 days | 34% |
| Erik Hummelmose | 8/10 | 6009 days | 33% |
| Ian E | 6/10 | 6009 days | 27% |
| Nadine Schaee | 9/10 | 6010 days | 34% |
| Belinda Godhard | 2/10 | 6010 days | 7% |
| Uwe Rieper | 10/10 | 6012 days | 34% |
| E.M. Prideaux | 10/10 | 6027 days | 34% |
| Elizabeth E | 8/10 | 6029 days | 33% |
| Stevens Frans | 8/10 | 6030 days | 33% |
| Heinrich Hax | 9/10 | 6033 days | 34% |
| tanh | 7/10 | 6060 days | 31% |
| Stephanie Steiner | 8/10 | 6079 days | 33% |
| Julia May | 9/10 | 6086 days | 34% |
| X Neils | 7/10 | 6097 days | 31% |
| Sarah Smith | 5/10 | 6101 days | 23% |
| Anna | 6/10 | 6105 days | 27% |
| OliverG1 | 7/10 | 6307 days | 31% |
| Philipp | 5/10 | 6319 days | 23% |
| JasminA | 5/10 | 6319 days | 23% |
| ChristinaV | 8/10 | 6329 days | 33% |
| JuergenSchnitzer | 9/10 | 6335 days | 34% |
| AstridVG | 7/10 | 6336 days | 31% |
| NatasjaV | 7/10 | 6337 days | 31% |
| JimmyK | 7/10 | 6337 days | 31% |
| MarcoJ | 9/10 | 6339 days | 34% |
| LucyPoland | 9/10 | 6340 days | 34% |
| Stolz | 7/10 | 6343 days | 31% |
| BrzezinskaM | 10/10 | 6344 days | 34% |
| AndreB | 10/10 | 6344 days | 34% |
| Linda | 7/10 | 6351 days | 31% |
| Susan | 8/10 | 6352 days | 33% |
| Byleveld | 7/10 | 6352 days | 31% |
| JoseB | 8/10 | 6353 days | 33% |
| JetteG | 10/10 | 6353 days | 34% |
| CarolF | 7/10 | 6354 days | 31% |
| Rachel | 9/10 | 6369 days | 34% |
| Claire | 7/10 | 6369 days | 31% |
| Denise | 8/10 | 6370 days | 33% |
| Denk | 8/10 | 6382 days | 33% |
| Klalis | 10/10 | 6384 days | 34% |
| Thomas | 4/10 | 6388 days | 17% |
| Mike | 5/10 | 6389 days | 23% |
| Debbie Mossman | 9/10 | 6394 days | 34% |
| Johann | 10/10 | 6396 days | 34% |
| Carina | 10/10 | 6398 days | 34% |
| Mat | 8/10 | 6437 days | 33% |
| Anette | 7/10 | 6439 days | 31% |
| midlands_missus | 8/10 | 6441 days | 33% |
| David | 7/10 | 6497 days | 31% |
| Suyin | 10/10 | 6517 days | 34% |
| Franz | 10/10 | 6690 days | 34% |
| Jennifer Baulch | 7/10 | 6695 days | 31% |
| George Jeffs | 10/10 | 6698 days | 34% |
| Jacob | 9/10 | 6702 days | 34% |
| Aharon | 10/10 | 6717 days | 34% |
| D.A. Mulder | 8/10 | 6718 days | 33% |
| Knol | 8/10 | 6720 days | 33% |
| Cole Penelope | 8/10 | 6723 days | 33% |
| Jody | 7/10 | 6731 days | 31% |
| Anna | 5/10 | 6731 days | 23% |
| Pauline Thai | 8/10 | 6738 days | 33% |
| Dan Adamson | 8/10 | 6738 days | 33% |
| Stephen Brightman | 8/10 | 6747 days | 33% |
| Madeleine Rowland | 8/10 | 6747 days | 33% |
| Bronwyn Gaby | 9/10 | 6765 days | 34% |
| Free_ride | 9/10 | 6781 days | 34% |
| Michael | 9/10 | 6804 days | 34% |
| Raul | 10/10 | 7054 days | 34% |
| TeamFlorida | 9/10 | 7056 days | 34% |
| TeamFlorida | 8/10 | 7056 days | 33% |
| James | 9/10 | 7069 days | 34% |
| Rudi | 10/10 | 7073 days | 34% |
| Rolf Kruger | 10/10 | 7097 days | 34% |
| Brian | 10/10 | 7101 days | 34% |
Adjustments
Several adjustments to the weighted average are added to improve relevancy and credibility. These adjustments apply equally to all experiences that meet the criteria.
Sample Size Adjustment
No Adjustment
A reasonable number of reviews are necessary in order for the average to be credible and for an experience to take a prime position within the ranking tables. As such, experiences with only a few reviews have a moderated score. This does not mean that the experience or the reviews can't be trusted. The Te Anau Glowworm Caves experience has plenty of reviews and does not meet the criteria for any adjustment.
Recent Reviews Adjustment
-2.01% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 125 days. However the Te Anau Glowworm Caves experience does not meet the criteria for any adjustment.
In addition, an experience's ranking score may be adjusted for each day there is no new ranking. After 1 day the adjustment comes into effect. The maximum number of days that can be adjusted for is 200 days. Due to the seasonal nature of many businesses, this adjustment is applied dynamically throughout the year.
The Te Anau Glowworm Caves experience has been adjusted for 200 days. Adjustments are according to the following table.
| Days | Adjustment |
|---|---|
| … | … |
| 197 | -1.98% |
| 198 | -1.99% |
| 199 | -2.00% |
| 200 | -2.01% |
| 201 | -2.02% |
| 202 | -2.03% |
| 203 | -2.04% |
| … | … |
Balancing Adjustment
2.60% Adjustment
Every experience's review score is adjusted to balance out the disproportional number of negative reviews that are contributed.
You won't be surprised to learn that disgruntled customers are more likely to leave a review than happy ones. They are motivated to share their experience and warn others. We consider this a good thing and it's why reading the reviews is important. However we've learned it can misrepresent the experience in a more overall sense.
We apply a balancing adjustment to counteract this effect and ensure the ranking score is a more fair representation of the experience. This adjustment is applied equally to all experiences.
Final Ranking Score
84%
The final ranking score once any adjustments, ratings, and rounding has been applied. This value is recalculated each day and a short rolling average is applied. Therefore it may not be precisely accurate based on the other values presented.