G'day, 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
83.54%
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 | 3111 days | 100% |
| Dan Coates | 9/10 | 3344 days | 78% |
| Dominik | 9/10 | 3344 days | 78% |
| Holloway | 10/10 | 3367 days | 77% |
| Christina | 6/10 | 3435 days | 58% |
| Barbara Knops | 9/10 | 3437 days | 69% |
| Manu Liberta | 10/10 | 3447 days | 69% |
| Bruno | 9/10 | 3457 days | 67% |
| Kirsty Smith | 10/10 | 3480 days | 66% |
| Sophia Satter | 8/10 | 3491 days | 63% |
| Afiya Levy | 10/10 | 3712 days | 44% |
| Johannes Eisel | 6/10 | 3721 days | 34% |
| Alexander Mattea | 5/10 | 3721 days | 28% |
| Timea Bagosi | 9/10 | 3723 days | 42% |
| Riviere | 8/10 | 3735 days | 40% |
| Dani | 8/10 | 3737 days | 40% |
| Benoit Leclerc | 7/10 | 3739 days | 37% |
| Anna Stoehr | 10/10 | 3757 days | 39% |
| Kai Krchmar | 6/10 | 3810 days | 27% |
| Kristina Farkas | 5/10 | 4105 days | 0% |
| Sophia Kadel | 10/10 | 4135 days | 3% |
| Laura and Marie | 7/10 | 4141 days | 1% |
| Rachel S | 10/10 | 4148 days | 2% |
| Joris Giullemot | 8/10 | 4457 days | 28% |
| Laura Metz | 7/10 | 4468 days | 25% |
| Hubertus Thost | 7/10 | 4468 days | 25% |
| Amanda | 4/10 | 4483 days | 12% |
| S B | 10/10 | 4496 days | 29% |
| M K | 10/10 | 4496 days | 29% |
| Maya Bakker-deDreu | 8/10 | 4504 days | 28% |
| Christin Woelk | 9/10 | 4784 days | 28% |
| Maria Klister | 7/10 | 4804 days | 25% |
| Lydia Kleinkoenen | 9/10 | 4824 days | 28% |
| Jessica Grewe | 9/10 | 4824 days | 28% |
| Hannah Lia-Isis Kubillus | 9/10 | 4824 days | 28% |
| Jan Zimmerman | 8/10 | 4835 days | 28% |
| Margaret and Derek McNeil | 10/10 | 4895 days | 29% |
| Frank and Suzanne | 8/10 | 4910 days | 28% |
| RollingMoon | 8/10 | 4971 days | 28% |
| Marcel & Kim Meichtry | 7/10 | 5191 days | 25% |
| Howell Davies | 5/10 | 5194 days | 17% |
| Baas | 7/10 | 5194 days | 25% |
| Pete & Pat Etheridge | 8/10 | 5194 days | 28% |
| Siegfried Richter | 7/10 | 5195 days | 25% |
| Melanie Mathiak | 10/10 | 5197 days | 29% |
| Sig Schrattner | 8/10 | 5197 days | 28% |
| Rebecca Doehl | 7/10 | 5198 days | 25% |
| Seth & Carla | 7/10 | 5199 days | 25% |
| Gabriele Wendt | 9/10 | 5199 days | 28% |
| Tadej Ferjan | 8/10 | 5199 days | 28% |
| Mary Mitchell | 10/10 | 5199 days | 29% |
| Emily Wikston | 9/10 | 5200 days | 28% |
| Andreas & Leonie Fehr | 10/10 | 5206 days | 29% |
| Horst Langstein | 9/10 | 5207 days | 28% |
| Marco Scheiber | 9/10 | 5208 days | 28% |
| Friedrich Kaltner | 10/10 | 5210 days | 29% |
| Frank & Julia | 10/10 | 5213 days | 29% |
| Thyg Lingdal | 10/10 | 5213 days | 29% |
| Nicole van Bergen | 8/10 | 5213 days | 28% |
| Mike & April Prince | 7/10 | 5227 days | 25% |
| Alfred & Henrike | 8/10 | 5239 days | 28% |
| Lyn Stainton | 6/10 | 5288 days | 22% |
| Ken Talan | 10/10 | 5516 days | 29% |
| Jon_and_Family | 9/10 | 5520 days | 28% |
| Gertz | 10/10 | 5524 days | 29% |
| Katarina Bokor | 8/10 | 5528 days | 28% |
| Mark Franklin | 6/10 | 5528 days | 22% |
| Gordon Agent | 10/10 | 5528 days | 29% |
| Maureen Hardy | 8/10 | 5528 days | 28% |
| AJ van Pelt | 8/10 | 5528 days | 28% |
| Werner and Rita | 9/10 | 5535 days | 28% |
| Richard Dudfield | 10/10 | 5537 days | 29% |
| Sayaka | 7/10 | 5537 days | 25% |
| Urs and Isabella | 7/10 | 5538 days | 25% |
| Juliane Kleiu | 10/10 | 5541 days | 29% |
| Linda Kremer | 9/10 | 5542 days | 28% |
| Rebecca Johnston | 9/10 | 5542 days | 28% |
| David Mellard | 10/10 | 5543 days | 29% |
| Bruce & Elaine Chote | 10/10 | 5543 days | 29% |
| Paul Nickson | 8/10 | 5543 days | 28% |
| Monique | 8/10 | 5543 days | 28% |
| Beat & Connie | 10/10 | 5545 days | 29% |
| Alex Stil | 9/10 | 5545 days | 28% |
| Pein van Nosrt | 7/10 | 5550 days | 25% |
| Raith | 9/10 | 5550 days | 28% |
| Elise van Haastert | 8/10 | 5550 days | 28% |
| Claudia | 10/10 | 5552 days | 29% |
| Carolin Ranner | 6/10 | 5552 days | 22% |
| Winskowsky | 9/10 | 5553 days | 28% |
| Hvid | 9/10 | 5567 days | 28% |
| Judith K. | 6/10 | 5569 days | 22% |
| Ruben and Jetske | 7/10 | 5569 days | 25% |
| Roy Seymour | 9/10 | 5570 days | 28% |
| Tom Hill | 10/10 | 5574 days | 29% |
| Ruua Reyrink | 7/10 | 5575 days | 25% |
| Patrick Hugener | 9/10 | 5575 days | 28% |
| JohnHaestad | 4/10 | 5579 days | 12% |
| dollimyxture | 10/10 | 5610 days | 29% |
| aggiemary04 | 10/10 | 5702 days | 29% |
| victoriauk | 4/10 | 5824 days | 12% |
| Baumgarten | 8/10 | 5852 days | 28% |
| travelbunnyadventures | 8/10 | 5855 days | 28% |
| Don & Geraldine | 10/10 | 5891 days | 29% |
| Matthias & Ceristiane | 8/10 | 5903 days | 28% |
| Hilary and Chris Ayton | 9/10 | 5904 days | 28% |
| Lis & Rob Tate | 9/10 | 5906 days | 28% |
| ccthornton100 | 10/10 | 5916 days | 29% |
| Bob Kusesia | 10/10 | 5917 days | 29% |
| Yssel de Schepper | 7/10 | 5922 days | 25% |
| Janny Meerdinnk Veldboow | 7/10 | 5922 days | 25% |
| Arie Ascher | 9/10 | 5923 days | 28% |
| Wolfgang Engelke | 10/10 | 5925 days | 29% |
| Thomas K | 9/10 | 5925 days | 28% |
| Loleit | 7/10 | 5937 days | 25% |
| Mattias Thorm | 9/10 | 5938 days | 28% |
| Vincente Garrido | 4/10 | 5939 days | 12% |
| R Gilge | 10/10 | 5940 days | 29% |
| Erik Hummelmose | 8/10 | 5940 days | 28% |
| Ian E | 6/10 | 5940 days | 22% |
| Nadine Schaee | 9/10 | 5941 days | 28% |
| Belinda Godhard | 2/10 | 5941 days | 2% |
| Uwe Rieper | 10/10 | 5943 days | 29% |
| E.M. Prideaux | 10/10 | 5958 days | 29% |
| Elizabeth E | 8/10 | 5960 days | 28% |
| Stevens Frans | 8/10 | 5961 days | 28% |
| Heinrich Hax | 9/10 | 5964 days | 28% |
| tanh | 7/10 | 5991 days | 25% |
| Stephanie Steiner | 8/10 | 6010 days | 28% |
| Julia May | 9/10 | 6017 days | 28% |
| X Neils | 7/10 | 6028 days | 25% |
| Sarah Smith | 5/10 | 6032 days | 17% |
| Anna | 6/10 | 6036 days | 22% |
| OliverG1 | 7/10 | 6238 days | 25% |
| Philipp | 5/10 | 6250 days | 17% |
| JasminA | 5/10 | 6250 days | 17% |
| ChristinaV | 8/10 | 6259 days | 28% |
| JuergenSchnitzer | 9/10 | 6266 days | 28% |
| AstridVG | 7/10 | 6266 days | 25% |
| NatasjaV | 7/10 | 6268 days | 25% |
| JimmyK | 7/10 | 6268 days | 25% |
| MarcoJ | 9/10 | 6270 days | 28% |
| LucyPoland | 9/10 | 6271 days | 28% |
| Stolz | 7/10 | 6273 days | 25% |
| BrzezinskaM | 10/10 | 6275 days | 29% |
| AndreB | 10/10 | 6275 days | 29% |
| Linda | 7/10 | 6281 days | 25% |
| Susan | 8/10 | 6282 days | 28% |
| Byleveld | 7/10 | 6283 days | 25% |
| JoseB | 8/10 | 6284 days | 28% |
| JetteG | 10/10 | 6284 days | 29% |
| CarolF | 7/10 | 6285 days | 25% |
| Rachel | 9/10 | 6299 days | 28% |
| Claire | 7/10 | 6299 days | 25% |
| Denise | 8/10 | 6300 days | 28% |
| Denk | 8/10 | 6312 days | 28% |
| Klalis | 10/10 | 6314 days | 29% |
| Thomas | 4/10 | 6318 days | 12% |
| Mike | 5/10 | 6319 days | 17% |
| Debbie Mossman | 9/10 | 6325 days | 28% |
| Johann | 10/10 | 6326 days | 29% |
| Carina | 10/10 | 6328 days | 29% |
| Mat | 8/10 | 6367 days | 28% |
| Anette | 7/10 | 6369 days | 25% |
| midlands_missus | 8/10 | 6372 days | 28% |
| David | 7/10 | 6427 days | 25% |
| Suyin | 10/10 | 6447 days | 29% |
| Franz | 10/10 | 6621 days | 29% |
| Jennifer Baulch | 7/10 | 6626 days | 25% |
| George Jeffs | 10/10 | 6629 days | 29% |
| Jacob | 9/10 | 6633 days | 28% |
| Aharon | 10/10 | 6648 days | 29% |
| D.A. Mulder | 8/10 | 6649 days | 28% |
| Knol | 8/10 | 6651 days | 28% |
| Cole Penelope | 8/10 | 6654 days | 28% |
| Jody | 7/10 | 6662 days | 25% |
| Anna | 5/10 | 6662 days | 17% |
| Pauline Thai | 8/10 | 6669 days | 28% |
| Dan Adamson | 8/10 | 6669 days | 28% |
| Stephen Brightman | 8/10 | 6678 days | 28% |
| Madeleine Rowland | 8/10 | 6678 days | 28% |
| Bronwyn Gaby | 9/10 | 6696 days | 28% |
| Free_ride | 9/10 | 6712 days | 28% |
| Michael | 9/10 | 6735 days | 28% |
| Raul | 10/10 | 6985 days | 29% |
| TeamFlorida | 9/10 | 6987 days | 28% |
| TeamFlorida | 8/10 | 6987 days | 28% |
| James | 9/10 | 7000 days | 28% |
| Rudi | 10/10 | 7004 days | 29% |
| Rolf Kruger | 10/10 | 7028 days | 29% |
| Brian | 10/10 | 7032 days | 29% |
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
-2.87% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 88 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 | -2.82% |
| 198 | -2.84% |
| 199 | -2.85% |
| 200 | -2.87% |
| 201 | -2.88% |
| 202 | -2.90% |
| 203 | -2.91% |
| … | … |
Balancing Adjustment
2.82% 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.