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
83.53%
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 | 3231 days | 100% |
| Dan Coates | 9/10 | 3464 days | 78% |
| Dominik | 9/10 | 3464 days | 78% |
| Holloway | 10/10 | 3487 days | 76% |
| Christina | 6/10 | 3555 days | 58% |
| Barbara Knops | 9/10 | 3557 days | 69% |
| Manu Liberta | 10/10 | 3567 days | 68% |
| Bruno | 9/10 | 3577 days | 67% |
| Kirsty Smith | 10/10 | 3600 days | 65% |
| Sophia Satter | 8/10 | 3611 days | 63% |
| Afiya Levy | 10/10 | 3832 days | 43% |
| Johannes Eisel | 6/10 | 3841 days | 34% |
| Alexander Mattea | 5/10 | 3841 days | 29% |
| Timea Bagosi | 9/10 | 3844 days | 41% |
| Riviere | 8/10 | 3855 days | 39% |
| Dani | 8/10 | 3857 days | 39% |
| Benoit Leclerc | 7/10 | 3859 days | 36% |
| Anna Stoehr | 10/10 | 3877 days | 38% |
| Kai Krchmar | 6/10 | 3930 days | 27% |
| Kristina Farkas | 5/10 | 4225 days | 1% |
| Sophia Kadel | 10/10 | 4255 days | 1% |
| Laura and Marie | 7/10 | 4261 days | 0% |
| Rachel S | 10/10 | 4269 days | 0% |
| Joris Giullemot | 8/10 | 4577 days | 38% |
| Laura Metz | 7/10 | 4588 days | 36% |
| Hubertus Thost | 7/10 | 4588 days | 36% |
| Amanda | 4/10 | 4603 days | 22% |
| S B | 10/10 | 4616 days | 39% |
| M K | 10/10 | 4616 days | 39% |
| Maya Bakker-deDreu | 8/10 | 4624 days | 38% |
| Christin Woelk | 9/10 | 4904 days | 38% |
| Maria Klister | 7/10 | 4924 days | 36% |
| Lydia Kleinkoenen | 9/10 | 4944 days | 38% |
| Jessica Grewe | 9/10 | 4944 days | 38% |
| Hannah Lia-Isis Kubillus | 9/10 | 4944 days | 38% |
| Jan Zimmerman | 8/10 | 4955 days | 38% |
| Margaret and Derek McNeil | 10/10 | 5015 days | 39% |
| Frank and Suzanne | 8/10 | 5030 days | 38% |
| RollingMoon | 8/10 | 5091 days | 38% |
| Marcel & Kim Meichtry | 7/10 | 5311 days | 36% |
| Howell Davies | 5/10 | 5314 days | 27% |
| Baas | 7/10 | 5314 days | 36% |
| Pete & Pat Etheridge | 8/10 | 5314 days | 38% |
| Siegfried Richter | 7/10 | 5315 days | 36% |
| Melanie Mathiak | 10/10 | 5317 days | 39% |
| Sig Schrattner | 8/10 | 5317 days | 38% |
| Rebecca Doehl | 7/10 | 5318 days | 36% |
| Seth & Carla | 7/10 | 5319 days | 36% |
| Gabriele Wendt | 9/10 | 5319 days | 38% |
| Tadej Ferjan | 8/10 | 5319 days | 38% |
| Mary Mitchell | 10/10 | 5319 days | 39% |
| Emily Wikston | 9/10 | 5320 days | 38% |
| Andreas & Leonie Fehr | 10/10 | 5326 days | 39% |
| Horst Langstein | 9/10 | 5327 days | 38% |
| Marco Scheiber | 9/10 | 5328 days | 38% |
| Friedrich Kaltner | 10/10 | 5330 days | 39% |
| Frank & Julia | 10/10 | 5333 days | 39% |
| Thyg Lingdal | 10/10 | 5333 days | 39% |
| Nicole van Bergen | 8/10 | 5333 days | 38% |
| Mike & April Prince | 7/10 | 5347 days | 36% |
| Alfred & Henrike | 8/10 | 5359 days | 38% |
| Lyn Stainton | 6/10 | 5408 days | 32% |
| Ken Talan | 10/10 | 5636 days | 39% |
| Jon_and_Family | 9/10 | 5640 days | 38% |
| Gertz | 10/10 | 5644 days | 39% |
| Katarina Bokor | 8/10 | 5648 days | 38% |
| Mark Franklin | 6/10 | 5648 days | 32% |
| Gordon Agent | 10/10 | 5648 days | 39% |
| Maureen Hardy | 8/10 | 5648 days | 38% |
| AJ van Pelt | 8/10 | 5648 days | 38% |
| Werner and Rita | 9/10 | 5655 days | 38% |
| Richard Dudfield | 10/10 | 5657 days | 39% |
| Sayaka | 7/10 | 5657 days | 36% |
| Urs and Isabella | 7/10 | 5658 days | 36% |
| Juliane Kleiu | 10/10 | 5661 days | 39% |
| Linda Kremer | 9/10 | 5662 days | 38% |
| Rebecca Johnston | 9/10 | 5662 days | 38% |
| David Mellard | 10/10 | 5663 days | 39% |
| Bruce & Elaine Chote | 10/10 | 5663 days | 39% |
| Paul Nickson | 8/10 | 5663 days | 38% |
| Monique | 8/10 | 5663 days | 38% |
| Beat & Connie | 10/10 | 5665 days | 39% |
| Alex Stil | 9/10 | 5665 days | 38% |
| Pein van Nosrt | 7/10 | 5670 days | 36% |
| Raith | 9/10 | 5670 days | 38% |
| Elise van Haastert | 8/10 | 5670 days | 38% |
| Claudia | 10/10 | 5672 days | 39% |
| Carolin Ranner | 6/10 | 5672 days | 32% |
| Winskowsky | 9/10 | 5673 days | 38% |
| Hvid | 9/10 | 5687 days | 38% |
| Judith K. | 6/10 | 5689 days | 32% |
| Ruben and Jetske | 7/10 | 5689 days | 36% |
| Roy Seymour | 9/10 | 5690 days | 38% |
| Tom Hill | 10/10 | 5694 days | 39% |
| Ruua Reyrink | 7/10 | 5695 days | 36% |
| Patrick Hugener | 9/10 | 5695 days | 38% |
| JohnHaestad | 4/10 | 5699 days | 22% |
| dollimyxture | 10/10 | 5730 days | 39% |
| aggiemary04 | 10/10 | 5822 days | 39% |
| victoriauk | 4/10 | 5944 days | 22% |
| Baumgarten | 8/10 | 5972 days | 38% |
| travelbunnyadventures | 8/10 | 5975 days | 38% |
| Don & Geraldine | 10/10 | 6011 days | 39% |
| Matthias & Ceristiane | 8/10 | 6023 days | 38% |
| Hilary and Chris Ayton | 9/10 | 6024 days | 38% |
| Lis & Rob Tate | 9/10 | 6026 days | 38% |
| ccthornton100 | 10/10 | 6036 days | 39% |
| Bob Kusesia | 10/10 | 6037 days | 39% |
| Yssel de Schepper | 7/10 | 6042 days | 36% |
| Janny Meerdinnk Veldboow | 7/10 | 6042 days | 36% |
| Arie Ascher | 9/10 | 6043 days | 38% |
| Wolfgang Engelke | 10/10 | 6045 days | 39% |
| Thomas K | 9/10 | 6045 days | 38% |
| Loleit | 7/10 | 6057 days | 36% |
| Mattias Thorm | 9/10 | 6058 days | 38% |
| Vincente Garrido | 4/10 | 6059 days | 22% |
| R Gilge | 10/10 | 6060 days | 39% |
| Erik Hummelmose | 8/10 | 6060 days | 38% |
| Ian E | 6/10 | 6060 days | 32% |
| Nadine Schaee | 9/10 | 6061 days | 38% |
| Belinda Godhard | 2/10 | 6061 days | 12% |
| Uwe Rieper | 10/10 | 6063 days | 39% |
| E.M. Prideaux | 10/10 | 6078 days | 39% |
| Elizabeth E | 8/10 | 6080 days | 38% |
| Stevens Frans | 8/10 | 6081 days | 38% |
| Heinrich Hax | 9/10 | 6084 days | 38% |
| tanh | 7/10 | 6111 days | 36% |
| Stephanie Steiner | 8/10 | 6130 days | 38% |
| Julia May | 9/10 | 6137 days | 38% |
| X Neils | 7/10 | 6148 days | 36% |
| Sarah Smith | 5/10 | 6152 days | 27% |
| Anna | 6/10 | 6156 days | 32% |
| OliverG1 | 7/10 | 6358 days | 36% |
| Philipp | 5/10 | 6370 days | 27% |
| JasminA | 5/10 | 6370 days | 27% |
| ChristinaV | 8/10 | 6379 days | 38% |
| JuergenSchnitzer | 9/10 | 6386 days | 38% |
| AstridVG | 7/10 | 6386 days | 36% |
| NatasjaV | 7/10 | 6388 days | 36% |
| JimmyK | 7/10 | 6388 days | 36% |
| MarcoJ | 9/10 | 6390 days | 38% |
| LucyPoland | 9/10 | 6391 days | 38% |
| Stolz | 7/10 | 6393 days | 36% |
| BrzezinskaM | 10/10 | 6395 days | 39% |
| AndreB | 10/10 | 6395 days | 39% |
| Linda | 7/10 | 6401 days | 36% |
| Susan | 8/10 | 6402 days | 38% |
| Byleveld | 7/10 | 6403 days | 36% |
| JoseB | 8/10 | 6404 days | 38% |
| JetteG | 10/10 | 6404 days | 39% |
| CarolF | 7/10 | 6405 days | 36% |
| Rachel | 9/10 | 6419 days | 38% |
| Claire | 7/10 | 6419 days | 36% |
| Denise | 8/10 | 6420 days | 38% |
| Denk | 8/10 | 6432 days | 38% |
| Klalis | 10/10 | 6434 days | 39% |
| Thomas | 4/10 | 6438 days | 22% |
| Mike | 5/10 | 6439 days | 27% |
| Debbie Mossman | 9/10 | 6445 days | 38% |
| Johann | 10/10 | 6446 days | 39% |
| Carina | 10/10 | 6448 days | 39% |
| Mat | 8/10 | 6487 days | 38% |
| Anette | 7/10 | 6489 days | 36% |
| midlands_missus | 8/10 | 6492 days | 38% |
| David | 7/10 | 6547 days | 36% |
| Suyin | 10/10 | 6568 days | 39% |
| Franz | 10/10 | 6741 days | 39% |
| Jennifer Baulch | 7/10 | 6746 days | 36% |
| George Jeffs | 10/10 | 6749 days | 39% |
| Jacob | 9/10 | 6753 days | 38% |
| Aharon | 10/10 | 6768 days | 39% |
| D.A. Mulder | 8/10 | 6769 days | 38% |
| Knol | 8/10 | 6771 days | 38% |
| Cole Penelope | 8/10 | 6774 days | 38% |
| Jody | 7/10 | 6782 days | 36% |
| Anna | 5/10 | 6782 days | 27% |
| Pauline Thai | 8/10 | 6789 days | 38% |
| Dan Adamson | 8/10 | 6789 days | 38% |
| Stephen Brightman | 8/10 | 6798 days | 38% |
| Madeleine Rowland | 8/10 | 6798 days | 38% |
| Bronwyn Gaby | 9/10 | 6816 days | 38% |
| Free_ride | 9/10 | 6832 days | 38% |
| Michael | 9/10 | 6855 days | 38% |
| Raul | 10/10 | 7105 days | 39% |
| TeamFlorida | 9/10 | 7107 days | 38% |
| TeamFlorida | 8/10 | 7107 days | 38% |
| James | 9/10 | 7120 days | 38% |
| Rudi | 10/10 | 7124 days | 39% |
| Rolf Kruger | 10/10 | 7148 days | 39% |
| Brian | 10/10 | 7152 days | 39% |
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
-2.78% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 85 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 | -2.74% |
| 198 | -2.76% |
| 199 | -2.77% |
| 200 | -2.78% |
| 201 | -2.80% |
| 202 | -2.81% |
| 203 | -2.83% |
| … | … |
Balancing Adjustment
2.80% 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
84%
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.