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 | 3190 days | 100% |
| Dan Coates | 9/10 | 3423 days | 78% |
| Dominik | 9/10 | 3423 days | 78% |
| Holloway | 10/10 | 3446 days | 76% |
| Christina | 6/10 | 3514 days | 58% |
| Barbara Knops | 9/10 | 3516 days | 69% |
| Manu Liberta | 10/10 | 3526 days | 69% |
| Bruno | 9/10 | 3536 days | 67% |
| Kirsty Smith | 10/10 | 3559 days | 65% |
| Sophia Satter | 8/10 | 3570 days | 63% |
| Afiya Levy | 10/10 | 3791 days | 43% |
| Johannes Eisel | 6/10 | 3800 days | 34% |
| Alexander Mattea | 5/10 | 3800 days | 28% |
| Timea Bagosi | 9/10 | 3803 days | 41% |
| Riviere | 8/10 | 3814 days | 39% |
| Dani | 8/10 | 3816 days | 39% |
| Benoit Leclerc | 7/10 | 3818 days | 36% |
| Anna Stoehr | 10/10 | 3836 days | 38% |
| Kai Krchmar | 6/10 | 3889 days | 27% |
| Kristina Farkas | 5/10 | 4184 days | 0% |
| Sophia Kadel | 10/10 | 4214 days | 2% |
| Laura and Marie | 7/10 | 4220 days | 0% |
| Rachel S | 10/10 | 4228 days | 0% |
| Joris Giullemot | 8/10 | 4536 days | 34% |
| Laura Metz | 7/10 | 4547 days | 32% |
| Hubertus Thost | 7/10 | 4547 days | 32% |
| Amanda | 4/10 | 4562 days | 18% |
| S B | 10/10 | 4575 days | 35% |
| M K | 10/10 | 4575 days | 35% |
| Maya Bakker-deDreu | 8/10 | 4583 days | 34% |
| Christin Woelk | 9/10 | 4863 days | 35% |
| Maria Klister | 7/10 | 4883 days | 32% |
| Lydia Kleinkoenen | 9/10 | 4903 days | 35% |
| Jessica Grewe | 9/10 | 4903 days | 35% |
| Hannah Lia-Isis Kubillus | 9/10 | 4903 days | 35% |
| Jan Zimmerman | 8/10 | 4914 days | 34% |
| Margaret and Derek McNeil | 10/10 | 4974 days | 35% |
| Frank and Suzanne | 8/10 | 4989 days | 34% |
| RollingMoon | 8/10 | 5050 days | 34% |
| Marcel & Kim Meichtry | 7/10 | 5270 days | 32% |
| Howell Davies | 5/10 | 5273 days | 23% |
| Baas | 7/10 | 5273 days | 32% |
| Pete & Pat Etheridge | 8/10 | 5273 days | 34% |
| Siegfried Richter | 7/10 | 5274 days | 32% |
| Melanie Mathiak | 10/10 | 5276 days | 35% |
| Sig Schrattner | 8/10 | 5276 days | 34% |
| Rebecca Doehl | 7/10 | 5277 days | 32% |
| Seth & Carla | 7/10 | 5278 days | 32% |
| Gabriele Wendt | 9/10 | 5278 days | 35% |
| Tadej Ferjan | 8/10 | 5278 days | 34% |
| Mary Mitchell | 10/10 | 5278 days | 35% |
| Emily Wikston | 9/10 | 5279 days | 35% |
| Andreas & Leonie Fehr | 10/10 | 5285 days | 35% |
| Horst Langstein | 9/10 | 5286 days | 35% |
| Marco Scheiber | 9/10 | 5287 days | 35% |
| Friedrich Kaltner | 10/10 | 5289 days | 35% |
| Frank & Julia | 10/10 | 5292 days | 35% |
| Thyg Lingdal | 10/10 | 5292 days | 35% |
| Nicole van Bergen | 8/10 | 5292 days | 34% |
| Mike & April Prince | 7/10 | 5306 days | 32% |
| Alfred & Henrike | 8/10 | 5318 days | 34% |
| Lyn Stainton | 6/10 | 5367 days | 28% |
| Ken Talan | 10/10 | 5595 days | 35% |
| Jon_and_Family | 9/10 | 5599 days | 35% |
| Gertz | 10/10 | 5603 days | 35% |
| Katarina Bokor | 8/10 | 5607 days | 34% |
| Mark Franklin | 6/10 | 5607 days | 28% |
| Gordon Agent | 10/10 | 5607 days | 35% |
| Maureen Hardy | 8/10 | 5607 days | 34% |
| AJ van Pelt | 8/10 | 5607 days | 34% |
| Werner and Rita | 9/10 | 5614 days | 35% |
| Richard Dudfield | 10/10 | 5616 days | 35% |
| Sayaka | 7/10 | 5616 days | 32% |
| Urs and Isabella | 7/10 | 5617 days | 32% |
| Juliane Kleiu | 10/10 | 5620 days | 35% |
| Linda Kremer | 9/10 | 5621 days | 35% |
| Rebecca Johnston | 9/10 | 5621 days | 35% |
| David Mellard | 10/10 | 5622 days | 35% |
| Bruce & Elaine Chote | 10/10 | 5622 days | 35% |
| Paul Nickson | 8/10 | 5622 days | 34% |
| Monique | 8/10 | 5622 days | 34% |
| Beat & Connie | 10/10 | 5624 days | 35% |
| Alex Stil | 9/10 | 5624 days | 35% |
| Pein van Nosrt | 7/10 | 5629 days | 32% |
| Raith | 9/10 | 5629 days | 35% |
| Elise van Haastert | 8/10 | 5629 days | 34% |
| Claudia | 10/10 | 5631 days | 35% |
| Carolin Ranner | 6/10 | 5631 days | 28% |
| Winskowsky | 9/10 | 5632 days | 35% |
| Hvid | 9/10 | 5646 days | 35% |
| Judith K. | 6/10 | 5648 days | 28% |
| Ruben and Jetske | 7/10 | 5648 days | 32% |
| Roy Seymour | 9/10 | 5649 days | 35% |
| Tom Hill | 10/10 | 5653 days | 35% |
| Ruua Reyrink | 7/10 | 5654 days | 32% |
| Patrick Hugener | 9/10 | 5654 days | 35% |
| JohnHaestad | 4/10 | 5658 days | 18% |
| dollimyxture | 10/10 | 5689 days | 35% |
| aggiemary04 | 10/10 | 5781 days | 35% |
| victoriauk | 4/10 | 5903 days | 18% |
| Baumgarten | 8/10 | 5931 days | 34% |
| travelbunnyadventures | 8/10 | 5934 days | 34% |
| Don & Geraldine | 10/10 | 5970 days | 35% |
| Matthias & Ceristiane | 8/10 | 5982 days | 34% |
| Hilary and Chris Ayton | 9/10 | 5983 days | 35% |
| Lis & Rob Tate | 9/10 | 5985 days | 35% |
| ccthornton100 | 10/10 | 5995 days | 35% |
| Bob Kusesia | 10/10 | 5996 days | 35% |
| Yssel de Schepper | 7/10 | 6001 days | 32% |
| Janny Meerdinnk Veldboow | 7/10 | 6001 days | 32% |
| Arie Ascher | 9/10 | 6002 days | 35% |
| Wolfgang Engelke | 10/10 | 6004 days | 35% |
| Thomas K | 9/10 | 6004 days | 35% |
| Loleit | 7/10 | 6016 days | 32% |
| Mattias Thorm | 9/10 | 6017 days | 35% |
| Vincente Garrido | 4/10 | 6018 days | 18% |
| R Gilge | 10/10 | 6019 days | 35% |
| Erik Hummelmose | 8/10 | 6019 days | 34% |
| Ian E | 6/10 | 6019 days | 28% |
| Nadine Schaee | 9/10 | 6020 days | 35% |
| Belinda Godhard | 2/10 | 6020 days | 8% |
| Uwe Rieper | 10/10 | 6022 days | 35% |
| E.M. Prideaux | 10/10 | 6037 days | 35% |
| Elizabeth E | 8/10 | 6039 days | 34% |
| Stevens Frans | 8/10 | 6040 days | 34% |
| Heinrich Hax | 9/10 | 6043 days | 35% |
| tanh | 7/10 | 6070 days | 32% |
| Stephanie Steiner | 8/10 | 6089 days | 34% |
| Julia May | 9/10 | 6096 days | 35% |
| X Neils | 7/10 | 6107 days | 32% |
| Sarah Smith | 5/10 | 6111 days | 23% |
| Anna | 6/10 | 6115 days | 28% |
| OliverG1 | 7/10 | 6317 days | 32% |
| Philipp | 5/10 | 6329 days | 23% |
| JasminA | 5/10 | 6329 days | 23% |
| ChristinaV | 8/10 | 6338 days | 34% |
| JuergenSchnitzer | 9/10 | 6345 days | 35% |
| AstridVG | 7/10 | 6345 days | 32% |
| NatasjaV | 7/10 | 6347 days | 32% |
| JimmyK | 7/10 | 6347 days | 32% |
| MarcoJ | 9/10 | 6349 days | 35% |
| LucyPoland | 9/10 | 6350 days | 35% |
| Stolz | 7/10 | 6352 days | 32% |
| BrzezinskaM | 10/10 | 6354 days | 35% |
| AndreB | 10/10 | 6354 days | 35% |
| Linda | 7/10 | 6360 days | 32% |
| Susan | 8/10 | 6361 days | 34% |
| Byleveld | 7/10 | 6362 days | 32% |
| JoseB | 8/10 | 6363 days | 34% |
| JetteG | 10/10 | 6363 days | 35% |
| CarolF | 7/10 | 6364 days | 32% |
| Rachel | 9/10 | 6378 days | 35% |
| Claire | 7/10 | 6378 days | 32% |
| Denise | 8/10 | 6380 days | 34% |
| Denk | 8/10 | 6391 days | 34% |
| Klalis | 10/10 | 6394 days | 35% |
| Thomas | 4/10 | 6397 days | 18% |
| Mike | 5/10 | 6398 days | 23% |
| Debbie Mossman | 9/10 | 6404 days | 35% |
| Johann | 10/10 | 6405 days | 35% |
| Carina | 10/10 | 6407 days | 35% |
| Mat | 8/10 | 6446 days | 34% |
| Anette | 7/10 | 6448 days | 32% |
| midlands_missus | 8/10 | 6451 days | 34% |
| David | 7/10 | 6506 days | 32% |
| Suyin | 10/10 | 6527 days | 35% |
| Franz | 10/10 | 6700 days | 35% |
| Jennifer Baulch | 7/10 | 6705 days | 32% |
| George Jeffs | 10/10 | 6708 days | 35% |
| Jacob | 9/10 | 6712 days | 35% |
| Aharon | 10/10 | 6727 days | 35% |
| D.A. Mulder | 8/10 | 6728 days | 34% |
| Knol | 8/10 | 6730 days | 34% |
| Cole Penelope | 8/10 | 6733 days | 34% |
| Jody | 7/10 | 6741 days | 32% |
| Anna | 5/10 | 6741 days | 23% |
| Pauline Thai | 8/10 | 6748 days | 34% |
| Dan Adamson | 8/10 | 6748 days | 34% |
| Stephen Brightman | 8/10 | 6757 days | 34% |
| Madeleine Rowland | 8/10 | 6757 days | 34% |
| Bronwyn Gaby | 9/10 | 6775 days | 35% |
| Free_ride | 9/10 | 6791 days | 35% |
| Michael | 9/10 | 6814 days | 35% |
| Raul | 10/10 | 7064 days | 35% |
| TeamFlorida | 9/10 | 7066 days | 35% |
| TeamFlorida | 8/10 | 7066 days | 34% |
| James | 9/10 | 7079 days | 35% |
| Rudi | 10/10 | 7083 days | 35% |
| Rolf Kruger | 10/10 | 7107 days | 35% |
| Brian | 10/10 | 7111 days | 35% |
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
-2.08% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 123 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 | -2.05% |
| 198 | -2.06% |
| 199 | -2.07% |
| 200 | -2.08% |
| 201 | -2.09% |
| 202 | -2.11% |
| 203 | -2.12% |
| … | … |
Balancing Adjustment
2.62% 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.