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
83.54%
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 | 3051 days | 100% |
| Dan Coates | 9/10 | 3284 days | 79% |
| Dominik | 9/10 | 3284 days | 79% |
| Holloway | 10/10 | 3307 days | 78% |
| Christina | 6/10 | 3375 days | 58% |
| Barbara Knops | 9/10 | 3377 days | 70% |
| Manu Liberta | 10/10 | 3387 days | 70% |
| Bruno | 9/10 | 3397 days | 68% |
| Kirsty Smith | 10/10 | 3420 days | 67% |
| Sophia Satter | 8/10 | 3431 days | 64% |
| Afiya Levy | 10/10 | 3652 days | 46% |
| Johannes Eisel | 6/10 | 3661 days | 36% |
| Alexander Mattea | 5/10 | 3661 days | 29% |
| Timea Bagosi | 9/10 | 3664 days | 44% |
| Riviere | 8/10 | 3675 days | 42% |
| Dani | 8/10 | 3677 days | 42% |
| Benoit Leclerc | 7/10 | 3679 days | 39% |
| Anna Stoehr | 10/10 | 3697 days | 42% |
| Kai Krchmar | 6/10 | 3750 days | 29% |
| Kristina Farkas | 5/10 | 4045 days | 2% |
| Sophia Kadel | 10/10 | 4075 days | 7% |
| Laura and Marie | 7/10 | 4081 days | 4% |
| Rachel S | 10/10 | 4089 days | 5% |
| Joris Giullemot | 8/10 | 4397 days | 25% |
| Laura Metz | 7/10 | 4408 days | 22% |
| Hubertus Thost | 7/10 | 4408 days | 22% |
| Amanda | 4/10 | 4423 days | 9% |
| S B | 10/10 | 4436 days | 26% |
| M K | 10/10 | 4436 days | 26% |
| Maya Bakker-deDreu | 8/10 | 4444 days | 25% |
| Christin Woelk | 9/10 | 4724 days | 25% |
| Maria Klister | 7/10 | 4744 days | 22% |
| Lydia Kleinkoenen | 9/10 | 4764 days | 25% |
| Jessica Grewe | 9/10 | 4764 days | 25% |
| Hannah Lia-Isis Kubillus | 9/10 | 4764 days | 25% |
| Jan Zimmerman | 8/10 | 4775 days | 25% |
| Margaret and Derek McNeil | 10/10 | 4835 days | 26% |
| Frank and Suzanne | 8/10 | 4850 days | 25% |
| RollingMoon | 8/10 | 4911 days | 25% |
| Marcel & Kim Meichtry | 7/10 | 5131 days | 22% |
| Howell Davies | 5/10 | 5134 days | 14% |
| Baas | 7/10 | 5134 days | 22% |
| Pete & Pat Etheridge | 8/10 | 5134 days | 25% |
| Siegfried Richter | 7/10 | 5135 days | 22% |
| Melanie Mathiak | 10/10 | 5137 days | 26% |
| Sig Schrattner | 8/10 | 5137 days | 25% |
| Rebecca Doehl | 7/10 | 5138 days | 22% |
| Seth & Carla | 7/10 | 5139 days | 22% |
| Gabriele Wendt | 9/10 | 5139 days | 25% |
| Tadej Ferjan | 8/10 | 5139 days | 25% |
| Mary Mitchell | 10/10 | 5139 days | 26% |
| Emily Wikston | 9/10 | 5140 days | 25% |
| Andreas & Leonie Fehr | 10/10 | 5146 days | 26% |
| Horst Langstein | 9/10 | 5147 days | 25% |
| Marco Scheiber | 9/10 | 5148 days | 25% |
| Friedrich Kaltner | 10/10 | 5150 days | 26% |
| Frank & Julia | 10/10 | 5153 days | 26% |
| Thyg Lingdal | 10/10 | 5153 days | 26% |
| Nicole van Bergen | 8/10 | 5153 days | 25% |
| Mike & April Prince | 7/10 | 5167 days | 22% |
| Alfred & Henrike | 8/10 | 5179 days | 25% |
| Lyn Stainton | 6/10 | 5228 days | 19% |
| Ken Talan | 10/10 | 5456 days | 26% |
| Jon_and_Family | 9/10 | 5460 days | 25% |
| Gertz | 10/10 | 5464 days | 26% |
| Katarina Bokor | 8/10 | 5468 days | 25% |
| Mark Franklin | 6/10 | 5468 days | 19% |
| Gordon Agent | 10/10 | 5468 days | 26% |
| Maureen Hardy | 8/10 | 5468 days | 25% |
| AJ van Pelt | 8/10 | 5468 days | 25% |
| Werner and Rita | 9/10 | 5475 days | 25% |
| Richard Dudfield | 10/10 | 5477 days | 26% |
| Sayaka | 7/10 | 5477 days | 22% |
| Urs and Isabella | 7/10 | 5478 days | 22% |
| Juliane Kleiu | 10/10 | 5481 days | 26% |
| Linda Kremer | 9/10 | 5482 days | 25% |
| Rebecca Johnston | 9/10 | 5482 days | 25% |
| David Mellard | 10/10 | 5483 days | 26% |
| Bruce & Elaine Chote | 10/10 | 5483 days | 26% |
| Paul Nickson | 8/10 | 5483 days | 25% |
| Monique | 8/10 | 5483 days | 25% |
| Beat & Connie | 10/10 | 5485 days | 26% |
| Alex Stil | 9/10 | 5485 days | 25% |
| Pein van Nosrt | 7/10 | 5490 days | 22% |
| Raith | 9/10 | 5490 days | 25% |
| Elise van Haastert | 8/10 | 5490 days | 25% |
| Claudia | 10/10 | 5492 days | 26% |
| Carolin Ranner | 6/10 | 5492 days | 19% |
| Winskowsky | 9/10 | 5493 days | 25% |
| Hvid | 9/10 | 5507 days | 25% |
| Judith K. | 6/10 | 5509 days | 19% |
| Ruben and Jetske | 7/10 | 5509 days | 22% |
| Roy Seymour | 9/10 | 5510 days | 25% |
| Tom Hill | 10/10 | 5514 days | 26% |
| Ruua Reyrink | 7/10 | 5515 days | 22% |
| Patrick Hugener | 9/10 | 5515 days | 25% |
| JohnHaestad | 4/10 | 5519 days | 9% |
| dollimyxture | 10/10 | 5550 days | 26% |
| aggiemary04 | 10/10 | 5642 days | 26% |
| victoriauk | 4/10 | 5764 days | 9% |
| Baumgarten | 8/10 | 5792 days | 25% |
| travelbunnyadventures | 8/10 | 5795 days | 25% |
| Don & Geraldine | 10/10 | 5831 days | 26% |
| Matthias & Ceristiane | 8/10 | 5843 days | 25% |
| Hilary and Chris Ayton | 9/10 | 5844 days | 25% |
| Lis & Rob Tate | 9/10 | 5846 days | 25% |
| ccthornton100 | 10/10 | 5856 days | 26% |
| Bob Kusesia | 10/10 | 5857 days | 26% |
| Yssel de Schepper | 7/10 | 5862 days | 22% |
| Janny Meerdinnk Veldboow | 7/10 | 5862 days | 22% |
| Arie Ascher | 9/10 | 5863 days | 25% |
| Wolfgang Engelke | 10/10 | 5865 days | 26% |
| Thomas K | 9/10 | 5865 days | 25% |
| Loleit | 7/10 | 5877 days | 22% |
| Mattias Thorm | 9/10 | 5878 days | 25% |
| Vincente Garrido | 4/10 | 5879 days | 9% |
| R Gilge | 10/10 | 5880 days | 26% |
| Erik Hummelmose | 8/10 | 5880 days | 25% |
| Ian E | 6/10 | 5880 days | 19% |
| Nadine Schaee | 9/10 | 5881 days | 25% |
| Belinda Godhard | 2/10 | 5881 days | 0% |
| Uwe Rieper | 10/10 | 5883 days | 26% |
| E.M. Prideaux | 10/10 | 5898 days | 26% |
| Elizabeth E | 8/10 | 5900 days | 25% |
| Stevens Frans | 8/10 | 5901 days | 25% |
| Heinrich Hax | 9/10 | 5904 days | 25% |
| tanh | 7/10 | 5931 days | 22% |
| Stephanie Steiner | 8/10 | 5950 days | 25% |
| Julia May | 9/10 | 5957 days | 25% |
| X Neils | 7/10 | 5968 days | 22% |
| Sarah Smith | 5/10 | 5972 days | 14% |
| Anna | 6/10 | 5976 days | 19% |
| OliverG1 | 7/10 | 6178 days | 22% |
| Philipp | 5/10 | 6190 days | 14% |
| JasminA | 5/10 | 6190 days | 14% |
| ChristinaV | 8/10 | 6200 days | 25% |
| JuergenSchnitzer | 9/10 | 6206 days | 25% |
| AstridVG | 7/10 | 6206 days | 22% |
| NatasjaV | 7/10 | 6208 days | 22% |
| JimmyK | 7/10 | 6208 days | 22% |
| MarcoJ | 9/10 | 6210 days | 25% |
| LucyPoland | 9/10 | 6211 days | 25% |
| Stolz | 7/10 | 6214 days | 22% |
| BrzezinskaM | 10/10 | 6215 days | 26% |
| AndreB | 10/10 | 6215 days | 26% |
| Linda | 7/10 | 6222 days | 22% |
| Susan | 8/10 | 6222 days | 25% |
| Byleveld | 7/10 | 6223 days | 22% |
| JoseB | 8/10 | 6224 days | 25% |
| JetteG | 10/10 | 6224 days | 26% |
| CarolF | 7/10 | 6225 days | 22% |
| Rachel | 9/10 | 6239 days | 25% |
| Claire | 7/10 | 6239 days | 22% |
| Denise | 8/10 | 6241 days | 25% |
| Denk | 8/10 | 6252 days | 25% |
| Klalis | 10/10 | 6255 days | 26% |
| Thomas | 4/10 | 6258 days | 9% |
| Mike | 5/10 | 6259 days | 14% |
| Debbie Mossman | 9/10 | 6265 days | 25% |
| Johann | 10/10 | 6267 days | 26% |
| Carina | 10/10 | 6269 days | 26% |
| Mat | 8/10 | 6307 days | 25% |
| Anette | 7/10 | 6309 days | 22% |
| midlands_missus | 8/10 | 6312 days | 25% |
| David | 7/10 | 6368 days | 22% |
| Suyin | 10/10 | 6388 days | 26% |
| Franz | 10/10 | 6561 days | 26% |
| Jennifer Baulch | 7/10 | 6566 days | 22% |
| George Jeffs | 10/10 | 6569 days | 26% |
| Jacob | 9/10 | 6573 days | 25% |
| Aharon | 10/10 | 6588 days | 26% |
| D.A. Mulder | 8/10 | 6589 days | 25% |
| Knol | 8/10 | 6591 days | 25% |
| Cole Penelope | 8/10 | 6594 days | 25% |
| Jody | 7/10 | 6602 days | 22% |
| Anna | 5/10 | 6602 days | 14% |
| Pauline Thai | 8/10 | 6609 days | 25% |
| Dan Adamson | 8/10 | 6609 days | 25% |
| Stephen Brightman | 8/10 | 6618 days | 25% |
| Madeleine Rowland | 8/10 | 6618 days | 25% |
| Bronwyn Gaby | 9/10 | 6636 days | 25% |
| Free_ride | 9/10 | 6652 days | 25% |
| Michael | 9/10 | 6675 days | 25% |
| Raul | 10/10 | 6925 days | 26% |
| TeamFlorida | 9/10 | 6927 days | 25% |
| TeamFlorida | 8/10 | 6927 days | 25% |
| James | 9/10 | 6940 days | 25% |
| Rudi | 10/10 | 6944 days | 26% |
| Rolf Kruger | 10/10 | 6968 days | 26% |
| Brian | 10/10 | 6972 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
-4.01% 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 | -3.95% |
| 198 | -3.97% |
| 199 | -3.99% |
| 200 | -4.01% |
| 201 | -4.03% |
| 202 | -4.05% |
| 203 | -4.07% |
| … | … |
Balancing Adjustment
3.13% 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.