Kia ora, 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
83.55%
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 | 2605 days | 100% |
| Dan Coates | 9/10 | 2838 days | 86% |
| Dominik | 9/10 | 2838 days | 86% |
| Holloway | 10/10 | 2861 days | 86% |
| Christina | 6/10 | 2929 days | 70% |
| Barbara Knops | 9/10 | 2931 days | 81% |
| Manu Liberta | 10/10 | 2941 days | 81% |
| Bruno | 9/10 | 2951 days | 80% |
| Kirsty Smith | 10/10 | 2974 days | 79% |
| Sophia Satter | 8/10 | 2985 days | 77% |
| Afiya Levy | 10/10 | 3206 days | 66% |
| Johannes Eisel | 6/10 | 3215 days | 56% |
| Alexander Mattea | 5/10 | 3215 days | 49% |
| Timea Bagosi | 9/10 | 3217 days | 65% |
| Riviere | 8/10 | 3229 days | 63% |
| Dani | 8/10 | 3231 days | 63% |
| Benoit Leclerc | 7/10 | 3233 days | 60% |
| Anna Stoehr | 10/10 | 3251 days | 63% |
| Kai Krchmar | 6/10 | 3304 days | 51% |
| Kristina Farkas | 5/10 | 3599 days | 32% |
| Sophia Kadel | 10/10 | 3629 days | 41% |
| Laura and Marie | 7/10 | 3635 days | 38% |
| Rachel S | 10/10 | 3642 days | 40% |
| Joris Giullemot | 8/10 | 3951 days | 22% |
| Laura Metz | 7/10 | 3962 days | 20% |
| Hubertus Thost | 7/10 | 3962 days | 20% |
| Amanda | 4/10 | 3977 days | 12% |
| S B | 10/10 | 3990 days | 20% |
| M K | 10/10 | 3990 days | 20% |
| Maya Bakker-deDreu | 8/10 | 3998 days | 19% |
| Christin Woelk | 9/10 | 4278 days | 3% |
| Maria Klister | 7/10 | 4298 days | 2% |
| Lydia Kleinkoenen | 9/10 | 4318 days | 1% |
| Jessica Grewe | 9/10 | 4318 days | 1% |
| Hannah Lia-Isis Kubillus | 9/10 | 4318 days | 1% |
| Jan Zimmerman | 8/10 | 4329 days | 0% |
| Margaret and Derek McNeil | 10/10 | 4389 days | 27% |
| Frank and Suzanne | 8/10 | 4404 days | 26% |
| RollingMoon | 8/10 | 4465 days | 26% |
| Marcel & Kim Meichtry | 7/10 | 4685 days | 25% |
| Howell Davies | 5/10 | 4688 days | 20% |
| Baas | 7/10 | 4688 days | 25% |
| Pete & Pat Etheridge | 8/10 | 4688 days | 26% |
| Siegfried Richter | 7/10 | 4689 days | 25% |
| Melanie Mathiak | 10/10 | 4691 days | 27% |
| Sig Schrattner | 8/10 | 4691 days | 26% |
| Rebecca Doehl | 7/10 | 4692 days | 25% |
| Seth & Carla | 7/10 | 4693 days | 25% |
| Gabriele Wendt | 9/10 | 4693 days | 27% |
| Tadej Ferjan | 8/10 | 4693 days | 26% |
| Mary Mitchell | 10/10 | 4693 days | 27% |
| Emily Wikston | 9/10 | 4694 days | 27% |
| Andreas & Leonie Fehr | 10/10 | 4700 days | 27% |
| Horst Langstein | 9/10 | 4701 days | 27% |
| Marco Scheiber | 9/10 | 4702 days | 27% |
| Friedrich Kaltner | 10/10 | 4704 days | 27% |
| Frank & Julia | 10/10 | 4707 days | 27% |
| Thyg Lingdal | 10/10 | 4707 days | 27% |
| Nicole van Bergen | 8/10 | 4707 days | 26% |
| Mike & April Prince | 7/10 | 4721 days | 25% |
| Alfred & Henrike | 8/10 | 4733 days | 26% |
| Lyn Stainton | 6/10 | 4782 days | 23% |
| Ken Talan | 10/10 | 5010 days | 27% |
| Jon_and_Family | 9/10 | 5014 days | 27% |
| Gertz | 10/10 | 5018 days | 27% |
| Katarina Bokor | 8/10 | 5022 days | 26% |
| Mark Franklin | 6/10 | 5022 days | 23% |
| Gordon Agent | 10/10 | 5022 days | 27% |
| Maureen Hardy | 8/10 | 5022 days | 26% |
| AJ van Pelt | 8/10 | 5022 days | 26% |
| Werner and Rita | 9/10 | 5029 days | 27% |
| Richard Dudfield | 10/10 | 5031 days | 27% |
| Sayaka | 7/10 | 5031 days | 25% |
| Urs and Isabella | 7/10 | 5032 days | 25% |
| Juliane Kleiu | 10/10 | 5035 days | 27% |
| Linda Kremer | 9/10 | 5036 days | 27% |
| Rebecca Johnston | 9/10 | 5036 days | 27% |
| David Mellard | 10/10 | 5037 days | 27% |
| Bruce & Elaine Chote | 10/10 | 5037 days | 27% |
| Paul Nickson | 8/10 | 5037 days | 26% |
| Monique | 8/10 | 5037 days | 26% |
| Beat & Connie | 10/10 | 5039 days | 27% |
| Alex Stil | 9/10 | 5039 days | 27% |
| Pein van Nosrt | 7/10 | 5044 days | 25% |
| Raith | 9/10 | 5044 days | 27% |
| Elise van Haastert | 8/10 | 5044 days | 26% |
| Claudia | 10/10 | 5046 days | 27% |
| Carolin Ranner | 6/10 | 5046 days | 23% |
| Winskowsky | 9/10 | 5047 days | 27% |
| Hvid | 9/10 | 5061 days | 27% |
| Judith K. | 6/10 | 5063 days | 23% |
| Ruben and Jetske | 7/10 | 5063 days | 25% |
| Roy Seymour | 9/10 | 5064 days | 27% |
| Tom Hill | 10/10 | 5068 days | 27% |
| Ruua Reyrink | 7/10 | 5069 days | 25% |
| Patrick Hugener | 9/10 | 5069 days | 27% |
| JohnHaestad | 4/10 | 5073 days | 17% |
| dollimyxture | 10/10 | 5104 days | 27% |
| aggiemary04 | 10/10 | 5196 days | 27% |
| victoriauk | 4/10 | 5318 days | 17% |
| Baumgarten | 8/10 | 5346 days | 26% |
| travelbunnyadventures | 8/10 | 5349 days | 26% |
| Don & Geraldine | 10/10 | 5385 days | 27% |
| Matthias & Ceristiane | 8/10 | 5397 days | 26% |
| Hilary and Chris Ayton | 9/10 | 5398 days | 27% |
| Lis & Rob Tate | 9/10 | 5400 days | 27% |
| ccthornton100 | 10/10 | 5410 days | 27% |
| Bob Kusesia | 10/10 | 5411 days | 27% |
| Yssel de Schepper | 7/10 | 5416 days | 25% |
| Janny Meerdinnk Veldboow | 7/10 | 5416 days | 25% |
| Arie Ascher | 9/10 | 5417 days | 27% |
| Wolfgang Engelke | 10/10 | 5419 days | 27% |
| Thomas K | 9/10 | 5419 days | 27% |
| Loleit | 7/10 | 5431 days | 25% |
| Mattias Thorm | 9/10 | 5432 days | 27% |
| Vincente Garrido | 4/10 | 5433 days | 17% |
| R Gilge | 10/10 | 5434 days | 27% |
| Erik Hummelmose | 8/10 | 5434 days | 26% |
| Ian E | 6/10 | 5434 days | 23% |
| Nadine Schaee | 9/10 | 5435 days | 27% |
| Belinda Godhard | 2/10 | 5435 days | 11% |
| Uwe Rieper | 10/10 | 5437 days | 27% |
| E.M. Prideaux | 10/10 | 5452 days | 27% |
| Elizabeth E | 8/10 | 5454 days | 26% |
| Stevens Frans | 8/10 | 5455 days | 26% |
| Heinrich Hax | 9/10 | 5458 days | 27% |
| tanh | 7/10 | 5485 days | 25% |
| Stephanie Steiner | 8/10 | 5504 days | 26% |
| Julia May | 9/10 | 5511 days | 27% |
| X Neils | 7/10 | 5522 days | 25% |
| Sarah Smith | 5/10 | 5526 days | 20% |
| Anna | 6/10 | 5530 days | 23% |
| OliverG1 | 7/10 | 5732 days | 25% |
| Philipp | 5/10 | 5744 days | 20% |
| JasminA | 5/10 | 5744 days | 20% |
| ChristinaV | 8/10 | 5753 days | 26% |
| JuergenSchnitzer | 9/10 | 5760 days | 27% |
| AstridVG | 7/10 | 5760 days | 25% |
| NatasjaV | 7/10 | 5762 days | 25% |
| JimmyK | 7/10 | 5762 days | 25% |
| MarcoJ | 9/10 | 5764 days | 27% |
| LucyPoland | 9/10 | 5765 days | 27% |
| Stolz | 7/10 | 5767 days | 25% |
| BrzezinskaM | 10/10 | 5769 days | 27% |
| AndreB | 10/10 | 5769 days | 27% |
| Linda | 7/10 | 5775 days | 25% |
| Susan | 8/10 | 5776 days | 26% |
| Byleveld | 7/10 | 5777 days | 25% |
| JoseB | 8/10 | 5778 days | 26% |
| JetteG | 10/10 | 5778 days | 27% |
| CarolF | 7/10 | 5779 days | 25% |
| Rachel | 9/10 | 5793 days | 27% |
| Claire | 7/10 | 5793 days | 25% |
| Denise | 8/10 | 5794 days | 26% |
| Denk | 8/10 | 5806 days | 26% |
| Klalis | 10/10 | 5808 days | 27% |
| Thomas | 4/10 | 5812 days | 17% |
| Mike | 5/10 | 5813 days | 20% |
| Debbie Mossman | 9/10 | 5818 days | 27% |
| Johann | 10/10 | 5820 days | 27% |
| Carina | 10/10 | 5822 days | 27% |
| Mat | 8/10 | 5861 days | 26% |
| Anette | 7/10 | 5863 days | 25% |
| midlands_missus | 8/10 | 5865 days | 26% |
| David | 7/10 | 5921 days | 25% |
| Suyin | 10/10 | 5941 days | 27% |
| Franz | 10/10 | 6115 days | 27% |
| Jennifer Baulch | 7/10 | 6120 days | 25% |
| George Jeffs | 10/10 | 6123 days | 27% |
| Jacob | 9/10 | 6127 days | 27% |
| Aharon | 10/10 | 6142 days | 27% |
| D.A. Mulder | 8/10 | 6143 days | 26% |
| Knol | 8/10 | 6145 days | 26% |
| Cole Penelope | 8/10 | 6148 days | 26% |
| Jody | 7/10 | 6156 days | 25% |
| Anna | 5/10 | 6156 days | 20% |
| Pauline Thai | 8/10 | 6163 days | 26% |
| Dan Adamson | 8/10 | 6163 days | 26% |
| Stephen Brightman | 8/10 | 6172 days | 26% |
| Madeleine Rowland | 8/10 | 6172 days | 26% |
| Bronwyn Gaby | 9/10 | 6190 days | 27% |
| Free_ride | 9/10 | 6206 days | 27% |
| Michael | 9/10 | 6229 days | 27% |
| Raul | 10/10 | 6479 days | 27% |
| TeamFlorida | 9/10 | 6481 days | 27% |
| TeamFlorida | 8/10 | 6481 days | 26% |
| James | 9/10 | 6494 days | 27% |
| Rudi | 10/10 | 6498 days | 27% |
| Rolf Kruger | 10/10 | 6522 days | 27% |
| Brian | 10/10 | 6526 days | 27% |
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
-4.03% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 41 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 | -3.97% |
| 198 | -3.99% |
| 199 | -4.01% |
| 200 | -4.03% |
| 201 | -4.05% |
| 202 | -4.07% |
| 203 | -4.09% |
| … | … |
Balancing Adjustment
3.14% 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
83%
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.