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
83.54%
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 | 3049 days | 100% |
| Dan Coates | 9/10 | 3282 days | 79% |
| Dominik | 9/10 | 3282 days | 79% |
| Holloway | 10/10 | 3305 days | 78% |
| Christina | 6/10 | 3373 days | 58% |
| Barbara Knops | 9/10 | 3375 days | 70% |
| Manu Liberta | 10/10 | 3385 days | 70% |
| Bruno | 9/10 | 3395 days | 68% |
| Kirsty Smith | 10/10 | 3418 days | 67% |
| Sophia Satter | 8/10 | 3429 days | 64% |
| Afiya Levy | 10/10 | 3650 days | 46% |
| Johannes Eisel | 6/10 | 3659 days | 36% |
| Alexander Mattea | 5/10 | 3659 days | 29% |
| Timea Bagosi | 9/10 | 3661 days | 44% |
| Riviere | 8/10 | 3673 days | 42% |
| Dani | 8/10 | 3675 days | 42% |
| Benoit Leclerc | 7/10 | 3677 days | 39% |
| Anna Stoehr | 10/10 | 3695 days | 42% |
| Kai Krchmar | 6/10 | 3748 days | 29% |
| Kristina Farkas | 5/10 | 4043 days | 2% |
| Sophia Kadel | 10/10 | 4073 days | 7% |
| Laura and Marie | 7/10 | 4079 days | 4% |
| Rachel S | 10/10 | 4086 days | 6% |
| Joris Giullemot | 8/10 | 4395 days | 25% |
| Laura Metz | 7/10 | 4406 days | 22% |
| Hubertus Thost | 7/10 | 4406 days | 22% |
| Amanda | 4/10 | 4421 days | 9% |
| S B | 10/10 | 4434 days | 26% |
| M K | 10/10 | 4434 days | 26% |
| Maya Bakker-deDreu | 8/10 | 4442 days | 25% |
| Christin Woelk | 9/10 | 4722 days | 25% |
| Maria Klister | 7/10 | 4742 days | 22% |
| Lydia Kleinkoenen | 9/10 | 4762 days | 25% |
| Jessica Grewe | 9/10 | 4762 days | 25% |
| Hannah Lia-Isis Kubillus | 9/10 | 4762 days | 25% |
| Jan Zimmerman | 8/10 | 4773 days | 25% |
| Margaret and Derek McNeil | 10/10 | 4833 days | 26% |
| Frank and Suzanne | 8/10 | 4848 days | 25% |
| RollingMoon | 8/10 | 4909 days | 25% |
| Marcel & Kim Meichtry | 7/10 | 5129 days | 22% |
| Howell Davies | 5/10 | 5132 days | 14% |
| Baas | 7/10 | 5132 days | 22% |
| Pete & Pat Etheridge | 8/10 | 5132 days | 25% |
| Siegfried Richter | 7/10 | 5133 days | 22% |
| Melanie Mathiak | 10/10 | 5135 days | 26% |
| Sig Schrattner | 8/10 | 5135 days | 25% |
| Rebecca Doehl | 7/10 | 5136 days | 22% |
| Seth & Carla | 7/10 | 5137 days | 22% |
| Gabriele Wendt | 9/10 | 5137 days | 25% |
| Tadej Ferjan | 8/10 | 5137 days | 25% |
| Mary Mitchell | 10/10 | 5137 days | 26% |
| Emily Wikston | 9/10 | 5138 days | 25% |
| Andreas & Leonie Fehr | 10/10 | 5144 days | 26% |
| Horst Langstein | 9/10 | 5145 days | 25% |
| Marco Scheiber | 9/10 | 5146 days | 25% |
| Friedrich Kaltner | 10/10 | 5148 days | 26% |
| Frank & Julia | 10/10 | 5151 days | 26% |
| Thyg Lingdal | 10/10 | 5151 days | 26% |
| Nicole van Bergen | 8/10 | 5151 days | 25% |
| Mike & April Prince | 7/10 | 5165 days | 22% |
| Alfred & Henrike | 8/10 | 5177 days | 25% |
| Lyn Stainton | 6/10 | 5226 days | 19% |
| Ken Talan | 10/10 | 5454 days | 26% |
| Jon_and_Family | 9/10 | 5458 days | 25% |
| Gertz | 10/10 | 5462 days | 26% |
| Katarina Bokor | 8/10 | 5466 days | 25% |
| Mark Franklin | 6/10 | 5466 days | 19% |
| Gordon Agent | 10/10 | 5466 days | 26% |
| Maureen Hardy | 8/10 | 5466 days | 25% |
| AJ van Pelt | 8/10 | 5466 days | 25% |
| Werner and Rita | 9/10 | 5473 days | 25% |
| Richard Dudfield | 10/10 | 5475 days | 26% |
| Sayaka | 7/10 | 5475 days | 22% |
| Urs and Isabella | 7/10 | 5476 days | 22% |
| Juliane Kleiu | 10/10 | 5479 days | 26% |
| Linda Kremer | 9/10 | 5480 days | 25% |
| Rebecca Johnston | 9/10 | 5480 days | 25% |
| David Mellard | 10/10 | 5481 days | 26% |
| Bruce & Elaine Chote | 10/10 | 5481 days | 26% |
| Paul Nickson | 8/10 | 5481 days | 25% |
| Monique | 8/10 | 5481 days | 25% |
| Beat & Connie | 10/10 | 5483 days | 26% |
| Alex Stil | 9/10 | 5483 days | 25% |
| Pein van Nosrt | 7/10 | 5488 days | 22% |
| Raith | 9/10 | 5488 days | 25% |
| Elise van Haastert | 8/10 | 5488 days | 25% |
| Claudia | 10/10 | 5490 days | 26% |
| Carolin Ranner | 6/10 | 5490 days | 19% |
| Winskowsky | 9/10 | 5491 days | 25% |
| Hvid | 9/10 | 5505 days | 25% |
| Judith K. | 6/10 | 5507 days | 19% |
| Ruben and Jetske | 7/10 | 5507 days | 22% |
| Roy Seymour | 9/10 | 5508 days | 25% |
| Tom Hill | 10/10 | 5512 days | 26% |
| Ruua Reyrink | 7/10 | 5513 days | 22% |
| Patrick Hugener | 9/10 | 5513 days | 25% |
| JohnHaestad | 4/10 | 5517 days | 9% |
| dollimyxture | 10/10 | 5548 days | 26% |
| aggiemary04 | 10/10 | 5640 days | 26% |
| victoriauk | 4/10 | 5762 days | 9% |
| Baumgarten | 8/10 | 5790 days | 25% |
| travelbunnyadventures | 8/10 | 5793 days | 25% |
| Don & Geraldine | 10/10 | 5829 days | 26% |
| Matthias & Ceristiane | 8/10 | 5841 days | 25% |
| Hilary and Chris Ayton | 9/10 | 5842 days | 25% |
| Lis & Rob Tate | 9/10 | 5844 days | 25% |
| ccthornton100 | 10/10 | 5854 days | 26% |
| Bob Kusesia | 10/10 | 5855 days | 26% |
| Yssel de Schepper | 7/10 | 5860 days | 22% |
| Janny Meerdinnk Veldboow | 7/10 | 5860 days | 22% |
| Arie Ascher | 9/10 | 5861 days | 25% |
| Wolfgang Engelke | 10/10 | 5863 days | 26% |
| Thomas K | 9/10 | 5863 days | 25% |
| Loleit | 7/10 | 5875 days | 22% |
| Mattias Thorm | 9/10 | 5876 days | 25% |
| Vincente Garrido | 4/10 | 5877 days | 9% |
| R Gilge | 10/10 | 5878 days | 26% |
| Erik Hummelmose | 8/10 | 5878 days | 25% |
| Ian E | 6/10 | 5878 days | 19% |
| Nadine Schaee | 9/10 | 5879 days | 25% |
| Belinda Godhard | 2/10 | 5879 days | 0% |
| Uwe Rieper | 10/10 | 5881 days | 26% |
| E.M. Prideaux | 10/10 | 5896 days | 26% |
| Elizabeth E | 8/10 | 5898 days | 25% |
| Stevens Frans | 8/10 | 5899 days | 25% |
| Heinrich Hax | 9/10 | 5902 days | 25% |
| tanh | 7/10 | 5929 days | 22% |
| Stephanie Steiner | 8/10 | 5948 days | 25% |
| Julia May | 9/10 | 5955 days | 25% |
| X Neils | 7/10 | 5966 days | 22% |
| Sarah Smith | 5/10 | 5970 days | 14% |
| Anna | 6/10 | 5974 days | 19% |
| OliverG1 | 7/10 | 6176 days | 22% |
| Philipp | 5/10 | 6188 days | 14% |
| JasminA | 5/10 | 6188 days | 14% |
| ChristinaV | 8/10 | 6197 days | 25% |
| JuergenSchnitzer | 9/10 | 6204 days | 25% |
| AstridVG | 7/10 | 6204 days | 22% |
| NatasjaV | 7/10 | 6206 days | 22% |
| JimmyK | 7/10 | 6206 days | 22% |
| MarcoJ | 9/10 | 6208 days | 25% |
| LucyPoland | 9/10 | 6209 days | 25% |
| Stolz | 7/10 | 6211 days | 22% |
| BrzezinskaM | 10/10 | 6213 days | 26% |
| AndreB | 10/10 | 6213 days | 26% |
| Linda | 7/10 | 6219 days | 22% |
| Susan | 8/10 | 6220 days | 25% |
| Byleveld | 7/10 | 6221 days | 22% |
| JoseB | 8/10 | 6222 days | 25% |
| JetteG | 10/10 | 6222 days | 26% |
| CarolF | 7/10 | 6223 days | 22% |
| Rachel | 9/10 | 6237 days | 25% |
| Claire | 7/10 | 6237 days | 22% |
| Denise | 8/10 | 6238 days | 25% |
| Denk | 8/10 | 6250 days | 25% |
| Klalis | 10/10 | 6252 days | 26% |
| Thomas | 4/10 | 6256 days | 9% |
| Mike | 5/10 | 6257 days | 14% |
| Debbie Mossman | 9/10 | 6262 days | 25% |
| Johann | 10/10 | 6264 days | 26% |
| Carina | 10/10 | 6266 days | 26% |
| Mat | 8/10 | 6305 days | 25% |
| Anette | 7/10 | 6307 days | 22% |
| midlands_missus | 8/10 | 6309 days | 25% |
| David | 7/10 | 6365 days | 22% |
| Suyin | 10/10 | 6385 days | 26% |
| Franz | 10/10 | 6559 days | 26% |
| Jennifer Baulch | 7/10 | 6564 days | 22% |
| George Jeffs | 10/10 | 6567 days | 26% |
| Jacob | 9/10 | 6571 days | 25% |
| Aharon | 10/10 | 6586 days | 26% |
| D.A. Mulder | 8/10 | 6587 days | 25% |
| Knol | 8/10 | 6589 days | 25% |
| Cole Penelope | 8/10 | 6592 days | 25% |
| Jody | 7/10 | 6600 days | 22% |
| Anna | 5/10 | 6600 days | 14% |
| Pauline Thai | 8/10 | 6607 days | 25% |
| Dan Adamson | 8/10 | 6607 days | 25% |
| Stephen Brightman | 8/10 | 6616 days | 25% |
| Madeleine Rowland | 8/10 | 6616 days | 25% |
| Bronwyn Gaby | 9/10 | 6634 days | 25% |
| Free_ride | 9/10 | 6650 days | 25% |
| Michael | 9/10 | 6673 days | 25% |
| Raul | 10/10 | 6923 days | 26% |
| TeamFlorida | 9/10 | 6925 days | 25% |
| TeamFlorida | 8/10 | 6925 days | 25% |
| James | 9/10 | 6938 days | 25% |
| Rudi | 10/10 | 6942 days | 26% |
| Rolf Kruger | 10/10 | 6966 days | 26% |
| Brian | 10/10 | 6970 days | 26% |
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 57 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.