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
83.53%
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 | 3142 days | 100% |
| Dan Coates | 9/10 | 3375 days | 78% |
| Dominik | 9/10 | 3375 days | 78% |
| Holloway | 10/10 | 3398 days | 77% |
| Christina | 6/10 | 3466 days | 58% |
| Barbara Knops | 9/10 | 3468 days | 69% |
| Manu Liberta | 10/10 | 3478 days | 69% |
| Bruno | 9/10 | 3488 days | 67% |
| Kirsty Smith | 10/10 | 3511 days | 66% |
| Sophia Satter | 8/10 | 3522 days | 63% |
| Afiya Levy | 10/10 | 3743 days | 43% |
| Johannes Eisel | 6/10 | 3752 days | 34% |
| Alexander Mattea | 5/10 | 3752 days | 28% |
| Timea Bagosi | 9/10 | 3755 days | 42% |
| Riviere | 8/10 | 3766 days | 40% |
| Dani | 8/10 | 3768 days | 40% |
| Benoit Leclerc | 7/10 | 3770 days | 37% |
| Anna Stoehr | 10/10 | 3788 days | 39% |
| Kai Krchmar | 6/10 | 3841 days | 27% |
| Kristina Farkas | 5/10 | 4136 days | 0% |
| Sophia Kadel | 10/10 | 4166 days | 3% |
| Laura and Marie | 7/10 | 4172 days | 1% |
| Rachel S | 10/10 | 4180 days | 1% |
| Joris Giullemot | 8/10 | 4488 days | 30% |
| Laura Metz | 7/10 | 4499 days | 28% |
| Hubertus Thost | 7/10 | 4499 days | 28% |
| Amanda | 4/10 | 4514 days | 14% |
| S B | 10/10 | 4527 days | 31% |
| M K | 10/10 | 4527 days | 31% |
| Maya Bakker-deDreu | 8/10 | 4535 days | 30% |
| Christin Woelk | 9/10 | 4815 days | 31% |
| Maria Klister | 7/10 | 4835 days | 28% |
| Lydia Kleinkoenen | 9/10 | 4855 days | 31% |
| Jessica Grewe | 9/10 | 4855 days | 31% |
| Hannah Lia-Isis Kubillus | 9/10 | 4855 days | 31% |
| Jan Zimmerman | 8/10 | 4866 days | 30% |
| Margaret and Derek McNeil | 10/10 | 4926 days | 31% |
| Frank and Suzanne | 8/10 | 4941 days | 30% |
| RollingMoon | 8/10 | 5002 days | 30% |
| Marcel & Kim Meichtry | 7/10 | 5222 days | 28% |
| Howell Davies | 5/10 | 5225 days | 20% |
| Baas | 7/10 | 5225 days | 28% |
| Pete & Pat Etheridge | 8/10 | 5225 days | 30% |
| Siegfried Richter | 7/10 | 5226 days | 28% |
| Melanie Mathiak | 10/10 | 5228 days | 31% |
| Sig Schrattner | 8/10 | 5228 days | 30% |
| Rebecca Doehl | 7/10 | 5229 days | 28% |
| Seth & Carla | 7/10 | 5230 days | 28% |
| Gabriele Wendt | 9/10 | 5230 days | 31% |
| Tadej Ferjan | 8/10 | 5230 days | 30% |
| Mary Mitchell | 10/10 | 5230 days | 31% |
| Emily Wikston | 9/10 | 5231 days | 31% |
| Andreas & Leonie Fehr | 10/10 | 5237 days | 31% |
| Horst Langstein | 9/10 | 5238 days | 31% |
| Marco Scheiber | 9/10 | 5239 days | 31% |
| Friedrich Kaltner | 10/10 | 5241 days | 31% |
| Frank & Julia | 10/10 | 5244 days | 31% |
| Thyg Lingdal | 10/10 | 5244 days | 31% |
| Nicole van Bergen | 8/10 | 5244 days | 30% |
| Mike & April Prince | 7/10 | 5258 days | 28% |
| Alfred & Henrike | 8/10 | 5270 days | 30% |
| Lyn Stainton | 6/10 | 5319 days | 24% |
| Ken Talan | 10/10 | 5547 days | 31% |
| Jon_and_Family | 9/10 | 5551 days | 31% |
| Gertz | 10/10 | 5555 days | 31% |
| Katarina Bokor | 8/10 | 5559 days | 30% |
| Mark Franklin | 6/10 | 5559 days | 24% |
| Gordon Agent | 10/10 | 5559 days | 31% |
| Maureen Hardy | 8/10 | 5559 days | 30% |
| AJ van Pelt | 8/10 | 5559 days | 30% |
| Werner and Rita | 9/10 | 5566 days | 31% |
| Richard Dudfield | 10/10 | 5568 days | 31% |
| Sayaka | 7/10 | 5568 days | 28% |
| Urs and Isabella | 7/10 | 5569 days | 28% |
| Juliane Kleiu | 10/10 | 5572 days | 31% |
| Linda Kremer | 9/10 | 5573 days | 31% |
| Rebecca Johnston | 9/10 | 5573 days | 31% |
| David Mellard | 10/10 | 5574 days | 31% |
| Bruce & Elaine Chote | 10/10 | 5574 days | 31% |
| Paul Nickson | 8/10 | 5574 days | 30% |
| Monique | 8/10 | 5574 days | 30% |
| Beat & Connie | 10/10 | 5576 days | 31% |
| Alex Stil | 9/10 | 5576 days | 31% |
| Pein van Nosrt | 7/10 | 5581 days | 28% |
| Raith | 9/10 | 5581 days | 31% |
| Elise van Haastert | 8/10 | 5581 days | 30% |
| Claudia | 10/10 | 5583 days | 31% |
| Carolin Ranner | 6/10 | 5583 days | 24% |
| Winskowsky | 9/10 | 5584 days | 31% |
| Hvid | 9/10 | 5598 days | 31% |
| Judith K. | 6/10 | 5600 days | 24% |
| Ruben and Jetske | 7/10 | 5600 days | 28% |
| Roy Seymour | 9/10 | 5601 days | 31% |
| Tom Hill | 10/10 | 5605 days | 31% |
| Ruua Reyrink | 7/10 | 5606 days | 28% |
| Patrick Hugener | 9/10 | 5606 days | 31% |
| JohnHaestad | 4/10 | 5610 days | 14% |
| dollimyxture | 10/10 | 5641 days | 31% |
| aggiemary04 | 10/10 | 5733 days | 31% |
| victoriauk | 4/10 | 5855 days | 14% |
| Baumgarten | 8/10 | 5883 days | 30% |
| travelbunnyadventures | 8/10 | 5886 days | 30% |
| Don & Geraldine | 10/10 | 5922 days | 31% |
| Matthias & Ceristiane | 8/10 | 5934 days | 30% |
| Hilary and Chris Ayton | 9/10 | 5935 days | 31% |
| Lis & Rob Tate | 9/10 | 5937 days | 31% |
| ccthornton100 | 10/10 | 5947 days | 31% |
| Bob Kusesia | 10/10 | 5948 days | 31% |
| Yssel de Schepper | 7/10 | 5953 days | 28% |
| Janny Meerdinnk Veldboow | 7/10 | 5953 days | 28% |
| Arie Ascher | 9/10 | 5954 days | 31% |
| Wolfgang Engelke | 10/10 | 5956 days | 31% |
| Thomas K | 9/10 | 5956 days | 31% |
| Loleit | 7/10 | 5968 days | 28% |
| Mattias Thorm | 9/10 | 5969 days | 31% |
| Vincente Garrido | 4/10 | 5970 days | 14% |
| R Gilge | 10/10 | 5971 days | 31% |
| Erik Hummelmose | 8/10 | 5971 days | 30% |
| Ian E | 6/10 | 5971 days | 24% |
| Nadine Schaee | 9/10 | 5972 days | 31% |
| Belinda Godhard | 2/10 | 5972 days | 4% |
| Uwe Rieper | 10/10 | 5974 days | 31% |
| E.M. Prideaux | 10/10 | 5989 days | 31% |
| Elizabeth E | 8/10 | 5991 days | 30% |
| Stevens Frans | 8/10 | 5992 days | 30% |
| Heinrich Hax | 9/10 | 5995 days | 31% |
| tanh | 7/10 | 6022 days | 28% |
| Stephanie Steiner | 8/10 | 6041 days | 30% |
| Julia May | 9/10 | 6048 days | 31% |
| X Neils | 7/10 | 6059 days | 28% |
| Sarah Smith | 5/10 | 6063 days | 20% |
| Anna | 6/10 | 6067 days | 24% |
| OliverG1 | 7/10 | 6269 days | 28% |
| Philipp | 5/10 | 6281 days | 20% |
| JasminA | 5/10 | 6281 days | 20% |
| ChristinaV | 8/10 | 6291 days | 30% |
| JuergenSchnitzer | 9/10 | 6297 days | 31% |
| AstridVG | 7/10 | 6297 days | 28% |
| NatasjaV | 7/10 | 6299 days | 28% |
| JimmyK | 7/10 | 6299 days | 28% |
| MarcoJ | 9/10 | 6301 days | 31% |
| LucyPoland | 9/10 | 6302 days | 31% |
| Stolz | 7/10 | 6305 days | 28% |
| BrzezinskaM | 10/10 | 6306 days | 31% |
| AndreB | 10/10 | 6306 days | 31% |
| Linda | 7/10 | 6313 days | 28% |
| Susan | 8/10 | 6314 days | 30% |
| Byleveld | 7/10 | 6314 days | 28% |
| JoseB | 8/10 | 6315 days | 30% |
| JetteG | 10/10 | 6315 days | 31% |
| CarolF | 7/10 | 6316 days | 28% |
| Rachel | 9/10 | 6330 days | 31% |
| Claire | 7/10 | 6330 days | 28% |
| Denise | 8/10 | 6332 days | 30% |
| Denk | 8/10 | 6343 days | 30% |
| Klalis | 10/10 | 6346 days | 31% |
| Thomas | 4/10 | 6349 days | 14% |
| Mike | 5/10 | 6350 days | 20% |
| Debbie Mossman | 9/10 | 6356 days | 31% |
| Johann | 10/10 | 6358 days | 31% |
| Carina | 10/10 | 6360 days | 31% |
| Mat | 8/10 | 6398 days | 30% |
| Anette | 7/10 | 6400 days | 28% |
| midlands_missus | 8/10 | 6403 days | 30% |
| David | 7/10 | 6459 days | 28% |
| Suyin | 10/10 | 6479 days | 31% |
| Franz | 10/10 | 6652 days | 31% |
| Jennifer Baulch | 7/10 | 6657 days | 28% |
| George Jeffs | 10/10 | 6660 days | 31% |
| Jacob | 9/10 | 6664 days | 31% |
| Aharon | 10/10 | 6679 days | 31% |
| D.A. Mulder | 8/10 | 6680 days | 30% |
| Knol | 8/10 | 6682 days | 30% |
| Cole Penelope | 8/10 | 6685 days | 30% |
| Jody | 7/10 | 6693 days | 28% |
| Anna | 5/10 | 6693 days | 20% |
| Pauline Thai | 8/10 | 6700 days | 30% |
| Dan Adamson | 8/10 | 6700 days | 30% |
| Stephen Brightman | 8/10 | 6709 days | 30% |
| Madeleine Rowland | 8/10 | 6709 days | 30% |
| Bronwyn Gaby | 9/10 | 6727 days | 31% |
| Free_ride | 9/10 | 6743 days | 31% |
| Michael | 9/10 | 6766 days | 31% |
| Raul | 10/10 | 7016 days | 31% |
| TeamFlorida | 9/10 | 7018 days | 31% |
| TeamFlorida | 8/10 | 7018 days | 30% |
| James | 9/10 | 7031 days | 31% |
| Rudi | 10/10 | 7035 days | 31% |
| Rolf Kruger | 10/10 | 7059 days | 31% |
| Brian | 10/10 | 7063 days | 31% |
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
-2.26% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 114 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 | -2.23% |
| 198 | -2.24% |
| 199 | -2.25% |
| 200 | -2.26% |
| 201 | -2.27% |
| 202 | -2.29% |
| 203 | -2.30% |
| … | … |
Balancing Adjustment
2.66% 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.