Hey, 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 | 2633 days | 100% |
| Dan Coates | 9/10 | 2866 days | 86% |
| Dominik | 9/10 | 2866 days | 86% |
| Holloway | 10/10 | 2889 days | 86% |
| Christina | 6/10 | 2957 days | 70% |
| Barbara Knops | 9/10 | 2959 days | 81% |
| Manu Liberta | 10/10 | 2969 days | 81% |
| Bruno | 9/10 | 2979 days | 80% |
| Kirsty Smith | 10/10 | 3002 days | 79% |
| Sophia Satter | 8/10 | 3013 days | 77% |
| Afiya Levy | 10/10 | 3234 days | 66% |
| Johannes Eisel | 6/10 | 3243 days | 56% |
| Alexander Mattea | 5/10 | 3243 days | 49% |
| Timea Bagosi | 9/10 | 3246 days | 64% |
| Riviere | 8/10 | 3257 days | 63% |
| Dani | 8/10 | 3259 days | 63% |
| Benoit Leclerc | 7/10 | 3261 days | 60% |
| Anna Stoehr | 10/10 | 3279 days | 63% |
| Kai Krchmar | 6/10 | 3332 days | 52% |
| Kristina Farkas | 5/10 | 3627 days | 32% |
| Sophia Kadel | 10/10 | 3657 days | 41% |
| Laura and Marie | 7/10 | 3663 days | 38% |
| Rachel S | 10/10 | 3671 days | 40% |
| Joris Giullemot | 8/10 | 3979 days | 22% |
| Laura Metz | 7/10 | 3990 days | 20% |
| Hubertus Thost | 7/10 | 3990 days | 20% |
| Amanda | 4/10 | 4005 days | 13% |
| S B | 10/10 | 4018 days | 20% |
| M K | 10/10 | 4018 days | 20% |
| Maya Bakker-deDreu | 8/10 | 4026 days | 19% |
| Christin Woelk | 9/10 | 4306 days | 3% |
| Maria Klister | 7/10 | 4326 days | 2% |
| Lydia Kleinkoenen | 9/10 | 4346 days | 1% |
| Jessica Grewe | 9/10 | 4346 days | 1% |
| Hannah Lia-Isis Kubillus | 9/10 | 4346 days | 1% |
| Jan Zimmerman | 8/10 | 4357 days | 0% |
| Margaret and Derek McNeil | 10/10 | 4417 days | 29% |
| Frank and Suzanne | 8/10 | 4432 days | 28% |
| RollingMoon | 8/10 | 4493 days | 28% |
| Marcel & Kim Meichtry | 7/10 | 4713 days | 27% |
| Howell Davies | 5/10 | 4716 days | 21% |
| Baas | 7/10 | 4716 days | 27% |
| Pete & Pat Etheridge | 8/10 | 4716 days | 28% |
| Siegfried Richter | 7/10 | 4717 days | 27% |
| Melanie Mathiak | 10/10 | 4719 days | 29% |
| Sig Schrattner | 8/10 | 4719 days | 28% |
| Rebecca Doehl | 7/10 | 4720 days | 27% |
| Seth & Carla | 7/10 | 4721 days | 27% |
| Gabriele Wendt | 9/10 | 4721 days | 28% |
| Tadej Ferjan | 8/10 | 4721 days | 28% |
| Mary Mitchell | 10/10 | 4721 days | 29% |
| Emily Wikston | 9/10 | 4722 days | 28% |
| Andreas & Leonie Fehr | 10/10 | 4728 days | 29% |
| Horst Langstein | 9/10 | 4729 days | 28% |
| Marco Scheiber | 9/10 | 4730 days | 28% |
| Friedrich Kaltner | 10/10 | 4732 days | 29% |
| Frank & Julia | 10/10 | 4735 days | 29% |
| Thyg Lingdal | 10/10 | 4735 days | 29% |
| Nicole van Bergen | 8/10 | 4735 days | 28% |
| Mike & April Prince | 7/10 | 4749 days | 27% |
| Alfred & Henrike | 8/10 | 4761 days | 28% |
| Lyn Stainton | 6/10 | 4810 days | 24% |
| Ken Talan | 10/10 | 5038 days | 29% |
| Jon_and_Family | 9/10 | 5042 days | 28% |
| Gertz | 10/10 | 5046 days | 29% |
| Katarina Bokor | 8/10 | 5050 days | 28% |
| Mark Franklin | 6/10 | 5050 days | 24% |
| Gordon Agent | 10/10 | 5050 days | 29% |
| Maureen Hardy | 8/10 | 5050 days | 28% |
| AJ van Pelt | 8/10 | 5050 days | 28% |
| Werner and Rita | 9/10 | 5057 days | 28% |
| Richard Dudfield | 10/10 | 5059 days | 29% |
| Sayaka | 7/10 | 5059 days | 27% |
| Urs and Isabella | 7/10 | 5060 days | 27% |
| Juliane Kleiu | 10/10 | 5063 days | 29% |
| Linda Kremer | 9/10 | 5064 days | 28% |
| Rebecca Johnston | 9/10 | 5064 days | 28% |
| David Mellard | 10/10 | 5065 days | 29% |
| Bruce & Elaine Chote | 10/10 | 5065 days | 29% |
| Paul Nickson | 8/10 | 5065 days | 28% |
| Monique | 8/10 | 5065 days | 28% |
| Beat & Connie | 10/10 | 5067 days | 29% |
| Alex Stil | 9/10 | 5067 days | 28% |
| Pein van Nosrt | 7/10 | 5072 days | 27% |
| Raith | 9/10 | 5072 days | 28% |
| Elise van Haastert | 8/10 | 5072 days | 28% |
| Claudia | 10/10 | 5074 days | 29% |
| Carolin Ranner | 6/10 | 5074 days | 24% |
| Winskowsky | 9/10 | 5075 days | 28% |
| Hvid | 9/10 | 5089 days | 28% |
| Judith K. | 6/10 | 5091 days | 24% |
| Ruben and Jetske | 7/10 | 5091 days | 27% |
| Roy Seymour | 9/10 | 5092 days | 28% |
| Tom Hill | 10/10 | 5096 days | 29% |
| Ruua Reyrink | 7/10 | 5097 days | 27% |
| Patrick Hugener | 9/10 | 5097 days | 28% |
| JohnHaestad | 4/10 | 5101 days | 18% |
| dollimyxture | 10/10 | 5132 days | 29% |
| aggiemary04 | 10/10 | 5224 days | 29% |
| victoriauk | 4/10 | 5346 days | 18% |
| Baumgarten | 8/10 | 5374 days | 28% |
| travelbunnyadventures | 8/10 | 5377 days | 28% |
| Don & Geraldine | 10/10 | 5413 days | 29% |
| Matthias & Ceristiane | 8/10 | 5425 days | 28% |
| Hilary and Chris Ayton | 9/10 | 5426 days | 28% |
| Lis & Rob Tate | 9/10 | 5428 days | 28% |
| ccthornton100 | 10/10 | 5438 days | 29% |
| Bob Kusesia | 10/10 | 5439 days | 29% |
| Yssel de Schepper | 7/10 | 5444 days | 27% |
| Janny Meerdinnk Veldboow | 7/10 | 5444 days | 27% |
| Arie Ascher | 9/10 | 5445 days | 28% |
| Wolfgang Engelke | 10/10 | 5447 days | 29% |
| Thomas K | 9/10 | 5447 days | 28% |
| Loleit | 7/10 | 5459 days | 27% |
| Mattias Thorm | 9/10 | 5460 days | 28% |
| Vincente Garrido | 4/10 | 5461 days | 18% |
| R Gilge | 10/10 | 5462 days | 29% |
| Erik Hummelmose | 8/10 | 5462 days | 28% |
| Ian E | 6/10 | 5462 days | 24% |
| Nadine Schaee | 9/10 | 5463 days | 28% |
| Belinda Godhard | 2/10 | 5463 days | 12% |
| Uwe Rieper | 10/10 | 5465 days | 29% |
| E.M. Prideaux | 10/10 | 5480 days | 29% |
| Elizabeth E | 8/10 | 5482 days | 28% |
| Stevens Frans | 8/10 | 5483 days | 28% |
| Heinrich Hax | 9/10 | 5486 days | 28% |
| tanh | 7/10 | 5513 days | 27% |
| Stephanie Steiner | 8/10 | 5532 days | 28% |
| Julia May | 9/10 | 5539 days | 28% |
| X Neils | 7/10 | 5550 days | 27% |
| Sarah Smith | 5/10 | 5554 days | 21% |
| Anna | 6/10 | 5558 days | 24% |
| OliverG1 | 7/10 | 5760 days | 27% |
| Philipp | 5/10 | 5772 days | 21% |
| JasminA | 5/10 | 5772 days | 21% |
| ChristinaV | 8/10 | 5781 days | 28% |
| JuergenSchnitzer | 9/10 | 5788 days | 28% |
| AstridVG | 7/10 | 5788 days | 27% |
| NatasjaV | 7/10 | 5790 days | 27% |
| JimmyK | 7/10 | 5790 days | 27% |
| MarcoJ | 9/10 | 5792 days | 28% |
| LucyPoland | 9/10 | 5793 days | 28% |
| Stolz | 7/10 | 5795 days | 27% |
| BrzezinskaM | 10/10 | 5797 days | 29% |
| AndreB | 10/10 | 5797 days | 29% |
| Linda | 7/10 | 5803 days | 27% |
| Susan | 8/10 | 5804 days | 28% |
| Byleveld | 7/10 | 5805 days | 27% |
| JoseB | 8/10 | 5806 days | 28% |
| JetteG | 10/10 | 5806 days | 29% |
| CarolF | 7/10 | 5807 days | 27% |
| Rachel | 9/10 | 5821 days | 28% |
| Claire | 7/10 | 5821 days | 27% |
| Denise | 8/10 | 5822 days | 28% |
| Denk | 8/10 | 5834 days | 28% |
| Klalis | 10/10 | 5836 days | 29% |
| Thomas | 4/10 | 5840 days | 18% |
| Mike | 5/10 | 5841 days | 21% |
| Debbie Mossman | 9/10 | 5847 days | 28% |
| Johann | 10/10 | 5848 days | 29% |
| Carina | 10/10 | 5850 days | 29% |
| Mat | 8/10 | 5889 days | 28% |
| Anette | 7/10 | 5891 days | 27% |
| midlands_missus | 8/10 | 5894 days | 28% |
| David | 7/10 | 5949 days | 27% |
| Suyin | 10/10 | 5970 days | 29% |
| Franz | 10/10 | 6143 days | 29% |
| Jennifer Baulch | 7/10 | 6148 days | 27% |
| George Jeffs | 10/10 | 6151 days | 29% |
| Jacob | 9/10 | 6155 days | 28% |
| Aharon | 10/10 | 6170 days | 29% |
| D.A. Mulder | 8/10 | 6171 days | 28% |
| Knol | 8/10 | 6173 days | 28% |
| Cole Penelope | 8/10 | 6176 days | 28% |
| Jody | 7/10 | 6184 days | 27% |
| Anna | 5/10 | 6184 days | 21% |
| Pauline Thai | 8/10 | 6191 days | 28% |
| Dan Adamson | 8/10 | 6191 days | 28% |
| Stephen Brightman | 8/10 | 6200 days | 28% |
| Madeleine Rowland | 8/10 | 6200 days | 28% |
| Bronwyn Gaby | 9/10 | 6218 days | 28% |
| Free_ride | 9/10 | 6234 days | 28% |
| Michael | 9/10 | 6257 days | 28% |
| Raul | 10/10 | 6507 days | 29% |
| TeamFlorida | 9/10 | 6509 days | 28% |
| TeamFlorida | 8/10 | 6509 days | 28% |
| James | 9/10 | 6522 days | 28% |
| Rudi | 10/10 | 6526 days | 29% |
| Rolf Kruger | 10/10 | 6550 days | 29% |
| Brian | 10/10 | 6554 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
-4.10% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 46 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 | -4.04% |
| 198 | -4.06% |
| 199 | -4.08% |
| 200 | -4.10% |
| 201 | -4.12% |
| 202 | -4.14% |
| 203 | -4.16% |
| … | … |
Balancing Adjustment
3.15% 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.