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
83.67%
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 | 2968 days | 100% |
| Dan Coates | 9/10 | 3201 days | 83% |
| Dominik | 9/10 | 3201 days | 83% |
| Holloway | 10/10 | 3224 days | 82% |
| Christina | 6/10 | 3292 days | 67% |
| Barbara Knops | 9/10 | 3294 days | 77% |
| Manu Liberta | 10/10 | 3304 days | 77% |
| Bruno | 9/10 | 3314 days | 75% |
| Kirsty Smith | 10/10 | 3337 days | 74% |
| Sophia Satter | 8/10 | 3348 days | 72% |
| Afiya Levy | 10/10 | 3569 days | 57% |
| Johannes Eisel | 6/10 | 3578 days | 49% |
| Alexander Mattea | 5/10 | 3578 days | 43% |
| Timea Bagosi | 9/10 | 3581 days | 56% |
| Riviere | 8/10 | 3592 days | 55% |
| Dani | 8/10 | 3594 days | 55% |
| Benoit Leclerc | 7/10 | 3596 days | 52% |
| Anna Stoehr | 10/10 | 3614 days | 54% |
| Kai Krchmar | 6/10 | 3667 days | 43% |
| Kristina Farkas | 5/10 | 3962 days | 22% |
| Sophia Kadel | 10/10 | 3992 days | 27% |
| Laura and Marie | 7/10 | 3998 days | 24% |
| Rachel S | 10/10 | 4006 days | 26% |
| Joris Giullemot | 8/10 | 4314 days | 3% |
| Laura Metz | 7/10 | 4325 days | 2% |
| Hubertus Thost | 7/10 | 4325 days | 2% |
| Amanda | 4/10 | 4340 days | 1% |
| S B | 10/10 | 4353 days | 1% |
| M K | 10/10 | 4353 days | 1% |
| Maya Bakker-deDreu | 8/10 | 4361 days | 0% |
| Christin Woelk | 9/10 | 4641 days | 35% |
| Maria Klister | 7/10 | 4661 days | 33% |
| Lydia Kleinkoenen | 9/10 | 4681 days | 35% |
| Jessica Grewe | 9/10 | 4681 days | 35% |
| Hannah Lia-Isis Kubillus | 9/10 | 4681 days | 35% |
| Jan Zimmerman | 8/10 | 4692 days | 35% |
| Margaret and Derek McNeil | 10/10 | 4752 days | 36% |
| Frank and Suzanne | 8/10 | 4767 days | 35% |
| RollingMoon | 8/10 | 4828 days | 35% |
| Marcel & Kim Meichtry | 7/10 | 5048 days | 33% |
| Howell Davies | 5/10 | 5051 days | 27% |
| Baas | 7/10 | 5051 days | 33% |
| Pete & Pat Etheridge | 8/10 | 5051 days | 35% |
| Siegfried Richter | 7/10 | 5052 days | 33% |
| Melanie Mathiak | 10/10 | 5054 days | 36% |
| Sig Schrattner | 8/10 | 5054 days | 35% |
| Rebecca Doehl | 7/10 | 5055 days | 33% |
| Seth & Carla | 7/10 | 5056 days | 33% |
| Gabriele Wendt | 9/10 | 5056 days | 35% |
| Tadej Ferjan | 8/10 | 5056 days | 35% |
| Mary Mitchell | 10/10 | 5056 days | 36% |
| Emily Wikston | 9/10 | 5057 days | 35% |
| Andreas & Leonie Fehr | 10/10 | 5063 days | 36% |
| Horst Langstein | 9/10 | 5064 days | 35% |
| Marco Scheiber | 9/10 | 5065 days | 35% |
| Friedrich Kaltner | 10/10 | 5067 days | 36% |
| Frank & Julia | 10/10 | 5070 days | 36% |
| Thyg Lingdal | 10/10 | 5070 days | 36% |
| Nicole van Bergen | 8/10 | 5070 days | 35% |
| Mike & April Prince | 7/10 | 5084 days | 33% |
| Alfred & Henrike | 8/10 | 5096 days | 35% |
| Lyn Stainton | 6/10 | 5145 days | 31% |
| Ken Talan | 10/10 | 5373 days | 36% |
| Jon_and_Family | 9/10 | 5377 days | 35% |
| Gertz | 10/10 | 5381 days | 36% |
| Katarina Bokor | 8/10 | 5385 days | 35% |
| Mark Franklin | 6/10 | 5385 days | 31% |
| Gordon Agent | 10/10 | 5385 days | 36% |
| Maureen Hardy | 8/10 | 5385 days | 35% |
| AJ van Pelt | 8/10 | 5385 days | 35% |
| Werner and Rita | 9/10 | 5392 days | 35% |
| Richard Dudfield | 10/10 | 5394 days | 36% |
| Sayaka | 7/10 | 5394 days | 33% |
| Urs and Isabella | 7/10 | 5395 days | 33% |
| Juliane Kleiu | 10/10 | 5398 days | 36% |
| Linda Kremer | 9/10 | 5399 days | 35% |
| Rebecca Johnston | 9/10 | 5399 days | 35% |
| David Mellard | 10/10 | 5400 days | 36% |
| Bruce & Elaine Chote | 10/10 | 5400 days | 36% |
| Paul Nickson | 8/10 | 5400 days | 35% |
| Monique | 8/10 | 5400 days | 35% |
| Beat & Connie | 10/10 | 5402 days | 36% |
| Alex Stil | 9/10 | 5402 days | 35% |
| Pein van Nosrt | 7/10 | 5407 days | 33% |
| Raith | 9/10 | 5407 days | 35% |
| Elise van Haastert | 8/10 | 5407 days | 35% |
| Claudia | 10/10 | 5409 days | 36% |
| Carolin Ranner | 6/10 | 5409 days | 31% |
| Winskowsky | 9/10 | 5410 days | 35% |
| Hvid | 9/10 | 5424 days | 35% |
| Judith K. | 6/10 | 5426 days | 31% |
| Ruben and Jetske | 7/10 | 5426 days | 33% |
| Roy Seymour | 9/10 | 5427 days | 35% |
| Tom Hill | 10/10 | 5431 days | 36% |
| Ruua Reyrink | 7/10 | 5432 days | 33% |
| Patrick Hugener | 9/10 | 5432 days | 35% |
| JohnHaestad | 4/10 | 5436 days | 23% |
| dollimyxture | 10/10 | 5467 days | 36% |
| aggiemary04 | 10/10 | 5559 days | 36% |
| victoriauk | 4/10 | 5681 days | 23% |
| Baumgarten | 8/10 | 5709 days | 35% |
| travelbunnyadventures | 8/10 | 5712 days | 35% |
| Don & Geraldine | 10/10 | 5748 days | 36% |
| Matthias & Ceristiane | 8/10 | 5760 days | 35% |
| Hilary and Chris Ayton | 9/10 | 5761 days | 35% |
| Lis & Rob Tate | 9/10 | 5763 days | 35% |
| ccthornton100 | 10/10 | 5773 days | 36% |
| Bob Kusesia | 10/10 | 5774 days | 36% |
| Yssel de Schepper | 7/10 | 5779 days | 33% |
| Janny Meerdinnk Veldboow | 7/10 | 5779 days | 33% |
| Arie Ascher | 9/10 | 5780 days | 35% |
| Wolfgang Engelke | 10/10 | 5782 days | 36% |
| Thomas K | 9/10 | 5782 days | 35% |
| Loleit | 7/10 | 5794 days | 33% |
| Mattias Thorm | 9/10 | 5795 days | 35% |
| Vincente Garrido | 4/10 | 5796 days | 23% |
| R Gilge | 10/10 | 5797 days | 36% |
| Erik Hummelmose | 8/10 | 5797 days | 35% |
| Ian E | 6/10 | 5797 days | 31% |
| Nadine Schaee | 9/10 | 5798 days | 35% |
| Belinda Godhard | 2/10 | 5798 days | 16% |
| Uwe Rieper | 10/10 | 5800 days | 36% |
| E.M. Prideaux | 10/10 | 5815 days | 36% |
| Elizabeth E | 8/10 | 5817 days | 35% |
| Stevens Frans | 8/10 | 5818 days | 35% |
| Heinrich Hax | 9/10 | 5821 days | 35% |
| tanh | 7/10 | 5848 days | 33% |
| Stephanie Steiner | 8/10 | 5867 days | 35% |
| Julia May | 9/10 | 5874 days | 35% |
| X Neils | 7/10 | 5885 days | 33% |
| Sarah Smith | 5/10 | 5889 days | 27% |
| Anna | 6/10 | 5893 days | 31% |
| OliverG1 | 7/10 | 6095 days | 33% |
| Philipp | 5/10 | 6107 days | 27% |
| JasminA | 5/10 | 6107 days | 27% |
| ChristinaV | 8/10 | 6117 days | 35% |
| JuergenSchnitzer | 9/10 | 6123 days | 35% |
| AstridVG | 7/10 | 6123 days | 33% |
| NatasjaV | 7/10 | 6125 days | 33% |
| JimmyK | 7/10 | 6125 days | 33% |
| MarcoJ | 9/10 | 6127 days | 35% |
| LucyPoland | 9/10 | 6128 days | 35% |
| Stolz | 7/10 | 6131 days | 33% |
| BrzezinskaM | 10/10 | 6132 days | 36% |
| AndreB | 10/10 | 6132 days | 36% |
| Linda | 7/10 | 6139 days | 33% |
| Susan | 8/10 | 6139 days | 35% |
| Byleveld | 7/10 | 6140 days | 33% |
| JoseB | 8/10 | 6141 days | 35% |
| JetteG | 10/10 | 6141 days | 36% |
| CarolF | 7/10 | 6142 days | 33% |
| Rachel | 9/10 | 6156 days | 35% |
| Claire | 7/10 | 6156 days | 33% |
| Denise | 8/10 | 6158 days | 35% |
| Denk | 8/10 | 6169 days | 35% |
| Klalis | 10/10 | 6172 days | 36% |
| Thomas | 4/10 | 6175 days | 23% |
| Mike | 5/10 | 6176 days | 27% |
| Debbie Mossman | 9/10 | 6182 days | 35% |
| Johann | 10/10 | 6184 days | 36% |
| Carina | 10/10 | 6186 days | 36% |
| Mat | 8/10 | 6224 days | 35% |
| Anette | 7/10 | 6226 days | 33% |
| midlands_missus | 8/10 | 6229 days | 35% |
| David | 7/10 | 6285 days | 33% |
| Suyin | 10/10 | 6305 days | 36% |
| Franz | 10/10 | 6478 days | 36% |
| Jennifer Baulch | 7/10 | 6483 days | 33% |
| George Jeffs | 10/10 | 6486 days | 36% |
| Jacob | 9/10 | 6490 days | 35% |
| Aharon | 10/10 | 6505 days | 36% |
| D.A. Mulder | 8/10 | 6506 days | 35% |
| Knol | 8/10 | 6508 days | 35% |
| Cole Penelope | 8/10 | 6511 days | 35% |
| Jody | 7/10 | 6519 days | 33% |
| Anna | 5/10 | 6519 days | 27% |
| Pauline Thai | 8/10 | 6526 days | 35% |
| Dan Adamson | 8/10 | 6526 days | 35% |
| Stephen Brightman | 8/10 | 6535 days | 35% |
| Madeleine Rowland | 8/10 | 6535 days | 35% |
| Bronwyn Gaby | 9/10 | 6553 days | 35% |
| Free_ride | 9/10 | 6569 days | 35% |
| Michael | 9/10 | 6592 days | 35% |
| Raul | 10/10 | 6842 days | 36% |
| TeamFlorida | 9/10 | 6844 days | 35% |
| TeamFlorida | 8/10 | 6844 days | 35% |
| James | 9/10 | 6857 days | 35% |
| Rudi | 10/10 | 6861 days | 36% |
| Rolf Kruger | 10/10 | 6885 days | 36% |
| Brian | 10/10 | 6889 days | 36% |
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
-4.04% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 41 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 | -3.98% |
| 198 | -4.00% |
| 199 | -4.02% |
| 200 | -4.04% |
| 201 | -4.06% |
| 202 | -4.08% |
| 203 | -4.10% |
| … | … |
Balancing Adjustment
3.10% 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.