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
83.66%
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 | 2989 days | 100% |
| Dan Coates | 9/10 | 3222 days | 83% |
| Dominik | 9/10 | 3222 days | 83% |
| Holloway | 10/10 | 3245 days | 82% |
| Christina | 6/10 | 3313 days | 67% |
| Barbara Knops | 9/10 | 3315 days | 76% |
| Manu Liberta | 10/10 | 3325 days | 77% |
| Bruno | 9/10 | 3335 days | 75% |
| Kirsty Smith | 10/10 | 3358 days | 74% |
| Sophia Satter | 8/10 | 3369 days | 72% |
| Afiya Levy | 10/10 | 3590 days | 57% |
| Johannes Eisel | 6/10 | 3599 days | 49% |
| Alexander Mattea | 5/10 | 3599 days | 43% |
| Timea Bagosi | 9/10 | 3602 days | 56% |
| Riviere | 8/10 | 3613 days | 54% |
| Dani | 8/10 | 3615 days | 54% |
| Benoit Leclerc | 7/10 | 3617 days | 51% |
| Anna Stoehr | 10/10 | 3635 days | 54% |
| Kai Krchmar | 6/10 | 3688 days | 43% |
| Kristina Farkas | 5/10 | 3983 days | 22% |
| Sophia Kadel | 10/10 | 4013 days | 26% |
| Laura and Marie | 7/10 | 4019 days | 24% |
| Rachel S | 10/10 | 4027 days | 25% |
| Joris Giullemot | 8/10 | 4335 days | 3% |
| Laura Metz | 7/10 | 4346 days | 2% |
| Hubertus Thost | 7/10 | 4346 days | 2% |
| Amanda | 4/10 | 4361 days | 0% |
| S B | 10/10 | 4374 days | 0% |
| M K | 10/10 | 4374 days | 0% |
| Maya Bakker-deDreu | 8/10 | 4382 days | 36% |
| Christin Woelk | 9/10 | 4662 days | 36% |
| Maria Klister | 7/10 | 4682 days | 34% |
| Lydia Kleinkoenen | 9/10 | 4702 days | 36% |
| Jessica Grewe | 9/10 | 4702 days | 36% |
| Hannah Lia-Isis Kubillus | 9/10 | 4702 days | 36% |
| Jan Zimmerman | 8/10 | 4713 days | 36% |
| Margaret and Derek McNeil | 10/10 | 4773 days | 37% |
| Frank and Suzanne | 8/10 | 4788 days | 36% |
| RollingMoon | 8/10 | 4849 days | 36% |
| Marcel & Kim Meichtry | 7/10 | 5069 days | 34% |
| Howell Davies | 5/10 | 5072 days | 28% |
| Baas | 7/10 | 5072 days | 34% |
| Pete & Pat Etheridge | 8/10 | 5072 days | 36% |
| Siegfried Richter | 7/10 | 5073 days | 34% |
| Melanie Mathiak | 10/10 | 5075 days | 37% |
| Sig Schrattner | 8/10 | 5075 days | 36% |
| Rebecca Doehl | 7/10 | 5076 days | 34% |
| Seth & Carla | 7/10 | 5077 days | 34% |
| Gabriele Wendt | 9/10 | 5077 days | 36% |
| Tadej Ferjan | 8/10 | 5077 days | 36% |
| Mary Mitchell | 10/10 | 5077 days | 37% |
| Emily Wikston | 9/10 | 5078 days | 36% |
| Andreas & Leonie Fehr | 10/10 | 5084 days | 37% |
| Horst Langstein | 9/10 | 5085 days | 36% |
| Marco Scheiber | 9/10 | 5086 days | 36% |
| Friedrich Kaltner | 10/10 | 5088 days | 37% |
| Frank & Julia | 10/10 | 5091 days | 37% |
| Thyg Lingdal | 10/10 | 5091 days | 37% |
| Nicole van Bergen | 8/10 | 5091 days | 36% |
| Mike & April Prince | 7/10 | 5105 days | 34% |
| Alfred & Henrike | 8/10 | 5117 days | 36% |
| Lyn Stainton | 6/10 | 5166 days | 32% |
| Ken Talan | 10/10 | 5394 days | 37% |
| Jon_and_Family | 9/10 | 5398 days | 36% |
| Gertz | 10/10 | 5402 days | 37% |
| Katarina Bokor | 8/10 | 5406 days | 36% |
| Mark Franklin | 6/10 | 5406 days | 32% |
| Gordon Agent | 10/10 | 5406 days | 37% |
| Maureen Hardy | 8/10 | 5406 days | 36% |
| AJ van Pelt | 8/10 | 5406 days | 36% |
| Werner and Rita | 9/10 | 5413 days | 36% |
| Richard Dudfield | 10/10 | 5415 days | 37% |
| Sayaka | 7/10 | 5415 days | 34% |
| Urs and Isabella | 7/10 | 5416 days | 34% |
| Juliane Kleiu | 10/10 | 5419 days | 37% |
| Linda Kremer | 9/10 | 5420 days | 36% |
| Rebecca Johnston | 9/10 | 5420 days | 36% |
| David Mellard | 10/10 | 5421 days | 37% |
| Bruce & Elaine Chote | 10/10 | 5421 days | 37% |
| Paul Nickson | 8/10 | 5421 days | 36% |
| Monique | 8/10 | 5421 days | 36% |
| Beat & Connie | 10/10 | 5423 days | 37% |
| Alex Stil | 9/10 | 5423 days | 36% |
| Pein van Nosrt | 7/10 | 5428 days | 34% |
| Raith | 9/10 | 5428 days | 36% |
| Elise van Haastert | 8/10 | 5428 days | 36% |
| Claudia | 10/10 | 5430 days | 37% |
| Carolin Ranner | 6/10 | 5430 days | 32% |
| Winskowsky | 9/10 | 5431 days | 36% |
| Hvid | 9/10 | 5445 days | 36% |
| Judith K. | 6/10 | 5447 days | 32% |
| Ruben and Jetske | 7/10 | 5447 days | 34% |
| Roy Seymour | 9/10 | 5448 days | 36% |
| Tom Hill | 10/10 | 5452 days | 37% |
| Ruua Reyrink | 7/10 | 5453 days | 34% |
| Patrick Hugener | 9/10 | 5453 days | 36% |
| JohnHaestad | 4/10 | 5457 days | 24% |
| dollimyxture | 10/10 | 5488 days | 37% |
| aggiemary04 | 10/10 | 5580 days | 37% |
| victoriauk | 4/10 | 5702 days | 24% |
| Baumgarten | 8/10 | 5730 days | 36% |
| travelbunnyadventures | 8/10 | 5733 days | 36% |
| Don & Geraldine | 10/10 | 5769 days | 37% |
| Matthias & Ceristiane | 8/10 | 5781 days | 36% |
| Hilary and Chris Ayton | 9/10 | 5782 days | 36% |
| Lis & Rob Tate | 9/10 | 5784 days | 36% |
| ccthornton100 | 10/10 | 5794 days | 37% |
| Bob Kusesia | 10/10 | 5795 days | 37% |
| Yssel de Schepper | 7/10 | 5800 days | 34% |
| Janny Meerdinnk Veldboow | 7/10 | 5800 days | 34% |
| Arie Ascher | 9/10 | 5801 days | 36% |
| Wolfgang Engelke | 10/10 | 5803 days | 37% |
| Thomas K | 9/10 | 5803 days | 36% |
| Loleit | 7/10 | 5815 days | 34% |
| Mattias Thorm | 9/10 | 5816 days | 36% |
| Vincente Garrido | 4/10 | 5817 days | 24% |
| R Gilge | 10/10 | 5818 days | 37% |
| Erik Hummelmose | 8/10 | 5818 days | 36% |
| Ian E | 6/10 | 5818 days | 32% |
| Nadine Schaee | 9/10 | 5819 days | 36% |
| Belinda Godhard | 2/10 | 5819 days | 17% |
| Uwe Rieper | 10/10 | 5821 days | 37% |
| E.M. Prideaux | 10/10 | 5836 days | 37% |
| Elizabeth E | 8/10 | 5838 days | 36% |
| Stevens Frans | 8/10 | 5839 days | 36% |
| Heinrich Hax | 9/10 | 5842 days | 36% |
| tanh | 7/10 | 5869 days | 34% |
| Stephanie Steiner | 8/10 | 5888 days | 36% |
| Julia May | 9/10 | 5895 days | 36% |
| X Neils | 7/10 | 5906 days | 34% |
| Sarah Smith | 5/10 | 5910 days | 28% |
| Anna | 6/10 | 5914 days | 32% |
| OliverG1 | 7/10 | 6116 days | 34% |
| Philipp | 5/10 | 6128 days | 28% |
| JasminA | 5/10 | 6128 days | 28% |
| ChristinaV | 8/10 | 6138 days | 36% |
| JuergenSchnitzer | 9/10 | 6144 days | 36% |
| AstridVG | 7/10 | 6144 days | 34% |
| NatasjaV | 7/10 | 6146 days | 34% |
| JimmyK | 7/10 | 6146 days | 34% |
| MarcoJ | 9/10 | 6148 days | 36% |
| LucyPoland | 9/10 | 6149 days | 36% |
| Stolz | 7/10 | 6152 days | 34% |
| BrzezinskaM | 10/10 | 6153 days | 37% |
| AndreB | 10/10 | 6153 days | 37% |
| Linda | 7/10 | 6160 days | 34% |
| Susan | 8/10 | 6161 days | 36% |
| Byleveld | 7/10 | 6161 days | 34% |
| JoseB | 8/10 | 6162 days | 36% |
| JetteG | 10/10 | 6162 days | 37% |
| CarolF | 7/10 | 6163 days | 34% |
| Rachel | 9/10 | 6177 days | 36% |
| Claire | 7/10 | 6177 days | 34% |
| Denise | 8/10 | 6179 days | 36% |
| Denk | 8/10 | 6190 days | 36% |
| Klalis | 10/10 | 6193 days | 37% |
| Thomas | 4/10 | 6196 days | 24% |
| Mike | 5/10 | 6197 days | 28% |
| Debbie Mossman | 9/10 | 6203 days | 36% |
| Johann | 10/10 | 6205 days | 37% |
| Carina | 10/10 | 6207 days | 37% |
| Mat | 8/10 | 6245 days | 36% |
| Anette | 7/10 | 6247 days | 34% |
| midlands_missus | 8/10 | 6250 days | 36% |
| David | 7/10 | 6306 days | 34% |
| Suyin | 10/10 | 6326 days | 37% |
| Franz | 10/10 | 6499 days | 37% |
| Jennifer Baulch | 7/10 | 6504 days | 34% |
| George Jeffs | 10/10 | 6507 days | 37% |
| Jacob | 9/10 | 6511 days | 36% |
| Aharon | 10/10 | 6526 days | 37% |
| D.A. Mulder | 8/10 | 6527 days | 36% |
| Knol | 8/10 | 6529 days | 36% |
| Cole Penelope | 8/10 | 6532 days | 36% |
| Jody | 7/10 | 6540 days | 34% |
| Anna | 5/10 | 6540 days | 28% |
| Pauline Thai | 8/10 | 6547 days | 36% |
| Dan Adamson | 8/10 | 6547 days | 36% |
| Stephen Brightman | 8/10 | 6556 days | 36% |
| Madeleine Rowland | 8/10 | 6556 days | 36% |
| Bronwyn Gaby | 9/10 | 6574 days | 36% |
| Free_ride | 9/10 | 6590 days | 36% |
| Michael | 9/10 | 6613 days | 36% |
| Raul | 10/10 | 6863 days | 37% |
| TeamFlorida | 9/10 | 6865 days | 36% |
| TeamFlorida | 8/10 | 6865 days | 36% |
| James | 9/10 | 6878 days | 36% |
| Rudi | 10/10 | 6882 days | 37% |
| Rolf Kruger | 10/10 | 6906 days | 37% |
| Brian | 10/10 | 6910 days | 37% |
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
-4.05% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 44 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 | -3.99% |
| 198 | -4.01% |
| 199 | -4.03% |
| 200 | -4.05% |
| 201 | -4.07% |
| 202 | -4.09% |
| 203 | -4.11% |
| … | … |
Balancing Adjustment
3.11% 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.