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
83.53%
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 | 3150 days | 100% |
| Dan Coates | 9/10 | 3383 days | 78% |
| Dominik | 9/10 | 3383 days | 78% |
| Holloway | 10/10 | 3406 days | 77% |
| Christina | 6/10 | 3474 days | 58% |
| Barbara Knops | 9/10 | 3476 days | 69% |
| Manu Liberta | 10/10 | 3486 days | 69% |
| Bruno | 9/10 | 3496 days | 67% |
| Kirsty Smith | 10/10 | 3519 days | 66% |
| Sophia Satter | 8/10 | 3530 days | 63% |
| Afiya Levy | 10/10 | 3751 days | 43% |
| Johannes Eisel | 6/10 | 3760 days | 34% |
| Alexander Mattea | 5/10 | 3760 days | 28% |
| Timea Bagosi | 9/10 | 3763 days | 42% |
| Riviere | 8/10 | 3774 days | 40% |
| Dani | 8/10 | 3776 days | 40% |
| Benoit Leclerc | 7/10 | 3778 days | 37% |
| Anna Stoehr | 10/10 | 3796 days | 39% |
| Kai Krchmar | 6/10 | 3849 days | 27% |
| Kristina Farkas | 5/10 | 4144 days | 0% |
| Sophia Kadel | 10/10 | 4174 days | 3% |
| Laura and Marie | 7/10 | 4180 days | 1% |
| Rachel S | 10/10 | 4188 days | 1% |
| Joris Giullemot | 8/10 | 4496 days | 31% |
| Laura Metz | 7/10 | 4507 days | 28% |
| Hubertus Thost | 7/10 | 4507 days | 28% |
| Amanda | 4/10 | 4522 days | 15% |
| S B | 10/10 | 4535 days | 32% |
| M K | 10/10 | 4535 days | 32% |
| Maya Bakker-deDreu | 8/10 | 4543 days | 31% |
| Christin Woelk | 9/10 | 4823 days | 31% |
| Maria Klister | 7/10 | 4843 days | 28% |
| Lydia Kleinkoenen | 9/10 | 4863 days | 31% |
| Jessica Grewe | 9/10 | 4863 days | 31% |
| Hannah Lia-Isis Kubillus | 9/10 | 4863 days | 31% |
| Jan Zimmerman | 8/10 | 4874 days | 31% |
| Margaret and Derek McNeil | 10/10 | 4934 days | 32% |
| Frank and Suzanne | 8/10 | 4949 days | 31% |
| RollingMoon | 8/10 | 5010 days | 31% |
| Marcel & Kim Meichtry | 7/10 | 5230 days | 28% |
| Howell Davies | 5/10 | 5233 days | 20% |
| Baas | 7/10 | 5233 days | 28% |
| Pete & Pat Etheridge | 8/10 | 5233 days | 31% |
| Siegfried Richter | 7/10 | 5234 days | 28% |
| Melanie Mathiak | 10/10 | 5236 days | 32% |
| Sig Schrattner | 8/10 | 5236 days | 31% |
| Rebecca Doehl | 7/10 | 5237 days | 28% |
| Seth & Carla | 7/10 | 5238 days | 28% |
| Gabriele Wendt | 9/10 | 5238 days | 31% |
| Tadej Ferjan | 8/10 | 5238 days | 31% |
| Mary Mitchell | 10/10 | 5238 days | 32% |
| Emily Wikston | 9/10 | 5239 days | 31% |
| Andreas & Leonie Fehr | 10/10 | 5245 days | 32% |
| Horst Langstein | 9/10 | 5246 days | 31% |
| Marco Scheiber | 9/10 | 5247 days | 31% |
| Friedrich Kaltner | 10/10 | 5249 days | 32% |
| Frank & Julia | 10/10 | 5252 days | 32% |
| Thyg Lingdal | 10/10 | 5252 days | 32% |
| Nicole van Bergen | 8/10 | 5252 days | 31% |
| Mike & April Prince | 7/10 | 5266 days | 28% |
| Alfred & Henrike | 8/10 | 5278 days | 31% |
| Lyn Stainton | 6/10 | 5327 days | 25% |
| Ken Talan | 10/10 | 5555 days | 32% |
| Jon_and_Family | 9/10 | 5559 days | 31% |
| Gertz | 10/10 | 5563 days | 32% |
| Katarina Bokor | 8/10 | 5567 days | 31% |
| Mark Franklin | 6/10 | 5567 days | 25% |
| Gordon Agent | 10/10 | 5567 days | 32% |
| Maureen Hardy | 8/10 | 5567 days | 31% |
| AJ van Pelt | 8/10 | 5567 days | 31% |
| Werner and Rita | 9/10 | 5574 days | 31% |
| Richard Dudfield | 10/10 | 5576 days | 32% |
| Sayaka | 7/10 | 5576 days | 28% |
| Urs and Isabella | 7/10 | 5577 days | 28% |
| Juliane Kleiu | 10/10 | 5580 days | 32% |
| Linda Kremer | 9/10 | 5581 days | 31% |
| Rebecca Johnston | 9/10 | 5581 days | 31% |
| David Mellard | 10/10 | 5582 days | 32% |
| Bruce & Elaine Chote | 10/10 | 5582 days | 32% |
| Paul Nickson | 8/10 | 5582 days | 31% |
| Monique | 8/10 | 5582 days | 31% |
| Beat & Connie | 10/10 | 5584 days | 32% |
| Alex Stil | 9/10 | 5584 days | 31% |
| Pein van Nosrt | 7/10 | 5589 days | 28% |
| Raith | 9/10 | 5589 days | 31% |
| Elise van Haastert | 8/10 | 5589 days | 31% |
| Claudia | 10/10 | 5591 days | 32% |
| Carolin Ranner | 6/10 | 5591 days | 25% |
| Winskowsky | 9/10 | 5592 days | 31% |
| Hvid | 9/10 | 5606 days | 31% |
| Judith K. | 6/10 | 5608 days | 25% |
| Ruben and Jetske | 7/10 | 5608 days | 28% |
| Roy Seymour | 9/10 | 5609 days | 31% |
| Tom Hill | 10/10 | 5613 days | 32% |
| Ruua Reyrink | 7/10 | 5614 days | 28% |
| Patrick Hugener | 9/10 | 5614 days | 31% |
| JohnHaestad | 4/10 | 5618 days | 15% |
| dollimyxture | 10/10 | 5649 days | 32% |
| aggiemary04 | 10/10 | 5741 days | 32% |
| victoriauk | 4/10 | 5863 days | 15% |
| Baumgarten | 8/10 | 5891 days | 31% |
| travelbunnyadventures | 8/10 | 5894 days | 31% |
| Don & Geraldine | 10/10 | 5930 days | 32% |
| Matthias & Ceristiane | 8/10 | 5942 days | 31% |
| Hilary and Chris Ayton | 9/10 | 5943 days | 31% |
| Lis & Rob Tate | 9/10 | 5945 days | 31% |
| ccthornton100 | 10/10 | 5955 days | 32% |
| Bob Kusesia | 10/10 | 5956 days | 32% |
| Yssel de Schepper | 7/10 | 5961 days | 28% |
| Janny Meerdinnk Veldboow | 7/10 | 5961 days | 28% |
| Arie Ascher | 9/10 | 5962 days | 31% |
| Wolfgang Engelke | 10/10 | 5964 days | 32% |
| Thomas K | 9/10 | 5964 days | 31% |
| Loleit | 7/10 | 5976 days | 28% |
| Mattias Thorm | 9/10 | 5977 days | 31% |
| Vincente Garrido | 4/10 | 5978 days | 15% |
| R Gilge | 10/10 | 5979 days | 32% |
| Erik Hummelmose | 8/10 | 5979 days | 31% |
| Ian E | 6/10 | 5979 days | 25% |
| Nadine Schaee | 9/10 | 5980 days | 31% |
| Belinda Godhard | 2/10 | 5980 days | 5% |
| Uwe Rieper | 10/10 | 5982 days | 32% |
| E.M. Prideaux | 10/10 | 5997 days | 32% |
| Elizabeth E | 8/10 | 5999 days | 31% |
| Stevens Frans | 8/10 | 6000 days | 31% |
| Heinrich Hax | 9/10 | 6003 days | 31% |
| tanh | 7/10 | 6030 days | 28% |
| Stephanie Steiner | 8/10 | 6049 days | 31% |
| Julia May | 9/10 | 6056 days | 31% |
| X Neils | 7/10 | 6067 days | 28% |
| Sarah Smith | 5/10 | 6071 days | 20% |
| Anna | 6/10 | 6075 days | 25% |
| OliverG1 | 7/10 | 6277 days | 28% |
| Philipp | 5/10 | 6289 days | 20% |
| JasminA | 5/10 | 6289 days | 20% |
| ChristinaV | 8/10 | 6299 days | 31% |
| JuergenSchnitzer | 9/10 | 6305 days | 31% |
| AstridVG | 7/10 | 6306 days | 28% |
| NatasjaV | 7/10 | 6307 days | 28% |
| JimmyK | 7/10 | 6307 days | 28% |
| MarcoJ | 9/10 | 6309 days | 31% |
| LucyPoland | 9/10 | 6310 days | 31% |
| Stolz | 7/10 | 6313 days | 28% |
| BrzezinskaM | 10/10 | 6314 days | 32% |
| AndreB | 10/10 | 6314 days | 32% |
| Linda | 7/10 | 6321 days | 28% |
| Susan | 8/10 | 6322 days | 31% |
| Byleveld | 7/10 | 6322 days | 28% |
| JoseB | 8/10 | 6323 days | 31% |
| JetteG | 10/10 | 6323 days | 32% |
| CarolF | 7/10 | 6324 days | 28% |
| Rachel | 9/10 | 6339 days | 31% |
| Claire | 7/10 | 6339 days | 28% |
| Denise | 8/10 | 6340 days | 31% |
| Denk | 8/10 | 6351 days | 31% |
| Klalis | 10/10 | 6354 days | 32% |
| Thomas | 4/10 | 6358 days | 15% |
| Mike | 5/10 | 6359 days | 20% |
| Debbie Mossman | 9/10 | 6364 days | 31% |
| Johann | 10/10 | 6366 days | 32% |
| Carina | 10/10 | 6368 days | 32% |
| Mat | 8/10 | 6407 days | 31% |
| Anette | 7/10 | 6409 days | 28% |
| midlands_missus | 8/10 | 6411 days | 31% |
| David | 7/10 | 6467 days | 28% |
| Suyin | 10/10 | 6487 days | 32% |
| Franz | 10/10 | 6660 days | 32% |
| Jennifer Baulch | 7/10 | 6665 days | 28% |
| George Jeffs | 10/10 | 6668 days | 32% |
| Jacob | 9/10 | 6672 days | 31% |
| Aharon | 10/10 | 6687 days | 32% |
| D.A. Mulder | 8/10 | 6688 days | 31% |
| Knol | 8/10 | 6690 days | 31% |
| Cole Penelope | 8/10 | 6693 days | 31% |
| Jody | 7/10 | 6701 days | 28% |
| Anna | 5/10 | 6701 days | 20% |
| Pauline Thai | 8/10 | 6708 days | 31% |
| Dan Adamson | 8/10 | 6708 days | 31% |
| Stephen Brightman | 8/10 | 6717 days | 31% |
| Madeleine Rowland | 8/10 | 6717 days | 31% |
| Bronwyn Gaby | 9/10 | 6735 days | 31% |
| Free_ride | 9/10 | 6751 days | 31% |
| Michael | 9/10 | 6774 days | 31% |
| Raul | 10/10 | 7024 days | 32% |
| TeamFlorida | 9/10 | 7026 days | 31% |
| TeamFlorida | 8/10 | 7026 days | 31% |
| James | 9/10 | 7039 days | 31% |
| Rudi | 10/10 | 7043 days | 32% |
| Rolf Kruger | 10/10 | 7067 days | 32% |
| Brian | 10/10 | 7071 days | 32% |
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
-2.15% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 118 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 | -2.12% |
| 198 | -2.13% |
| 199 | -2.14% |
| 200 | -2.15% |
| 201 | -2.16% |
| 202 | -2.17% |
| 203 | -2.18% |
| … | … |
Balancing Adjustment
2.63% 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.