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
83.48%
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 | 2575 days | 100% |
| Dan Coates | 9/10 | 2808 days | 87% |
| Dominik | 9/10 | 2808 days | 87% |
| Holloway | 10/10 | 2831 days | 87% |
| Christina | 6/10 | 2899 days | 71% |
| Barbara Knops | 9/10 | 2901 days | 82% |
| Manu Liberta | 10/10 | 2911 days | 82% |
| Bruno | 9/10 | 2921 days | 81% |
| Kirsty Smith | 10/10 | 2944 days | 80% |
| Sophia Satter | 8/10 | 2955 days | 78% |
| Afiya Levy | 10/10 | 3176 days | 67% |
| Johannes Eisel | 6/10 | 3185 days | 57% |
| Alexander Mattea | 5/10 | 3185 days | 51% |
| Timea Bagosi | 9/10 | 3187 days | 66% |
| Riviere | 8/10 | 3199 days | 65% |
| Dani | 8/10 | 3201 days | 65% |
| Benoit Leclerc | 7/10 | 3203 days | 61% |
| Anna Stoehr | 10/10 | 3221 days | 65% |
| Kai Krchmar | 6/10 | 3274 days | 53% |
| Kristina Farkas | 5/10 | 3569 days | 34% |
| Sophia Kadel | 10/10 | 3599 days | 44% |
| Laura and Marie | 7/10 | 3605 days | 40% |
| Rachel S | 10/10 | 3612 days | 43% |
| Joris Giullemot | 8/10 | 3921 days | 25% |
| Laura Metz | 7/10 | 3932 days | 23% |
| Hubertus Thost | 7/10 | 3932 days | 23% |
| Amanda | 4/10 | 3947 days | 16% |
| S B | 10/10 | 3960 days | 23% |
| M K | 10/10 | 3960 days | 23% |
| Maya Bakker-deDreu | 8/10 | 3968 days | 22% |
| Christin Woelk | 9/10 | 4248 days | 7% |
| Maria Klister | 7/10 | 4268 days | 6% |
| Lydia Kleinkoenen | 9/10 | 4288 days | 5% |
| Jessica Grewe | 9/10 | 4288 days | 5% |
| Hannah Lia-Isis Kubillus | 9/10 | 4288 days | 5% |
| Jan Zimmerman | 8/10 | 4299 days | 4% |
| Margaret and Derek McNeil | 10/10 | 4359 days | 1% |
| Frank and Suzanne | 8/10 | 4374 days | 0% |
| RollingMoon | 8/10 | 4435 days | 28% |
| Marcel & Kim Meichtry | 7/10 | 4655 days | 26% |
| Howell Davies | 5/10 | 4658 days | 22% |
| Baas | 7/10 | 4658 days | 26% |
| Pete & Pat Etheridge | 8/10 | 4658 days | 28% |
| Siegfried Richter | 7/10 | 4659 days | 26% |
| Melanie Mathiak | 10/10 | 4661 days | 28% |
| Sig Schrattner | 8/10 | 4661 days | 28% |
| Rebecca Doehl | 7/10 | 4662 days | 26% |
| Seth & Carla | 7/10 | 4663 days | 26% |
| Gabriele Wendt | 9/10 | 4663 days | 28% |
| Tadej Ferjan | 8/10 | 4663 days | 28% |
| Mary Mitchell | 10/10 | 4663 days | 28% |
| Emily Wikston | 9/10 | 4664 days | 28% |
| Andreas & Leonie Fehr | 10/10 | 4670 days | 28% |
| Horst Langstein | 9/10 | 4671 days | 28% |
| Marco Scheiber | 9/10 | 4672 days | 28% |
| Friedrich Kaltner | 10/10 | 4674 days | 28% |
| Frank & Julia | 10/10 | 4677 days | 28% |
| Thyg Lingdal | 10/10 | 4677 days | 28% |
| Nicole van Bergen | 8/10 | 4677 days | 28% |
| Mike & April Prince | 7/10 | 4691 days | 26% |
| Alfred & Henrike | 8/10 | 4703 days | 28% |
| Lyn Stainton | 6/10 | 4752 days | 24% |
| Ken Talan | 10/10 | 4980 days | 28% |
| Jon_and_Family | 9/10 | 4984 days | 28% |
| Gertz | 10/10 | 4988 days | 28% |
| Katarina Bokor | 8/10 | 4992 days | 28% |
| Mark Franklin | 6/10 | 4992 days | 24% |
| Gordon Agent | 10/10 | 4992 days | 28% |
| Maureen Hardy | 8/10 | 4992 days | 28% |
| AJ van Pelt | 8/10 | 4992 days | 28% |
| Werner and Rita | 9/10 | 4999 days | 28% |
| Richard Dudfield | 10/10 | 5001 days | 28% |
| Sayaka | 7/10 | 5001 days | 26% |
| Urs and Isabella | 7/10 | 5002 days | 26% |
| Juliane Kleiu | 10/10 | 5005 days | 28% |
| Linda Kremer | 9/10 | 5006 days | 28% |
| Rebecca Johnston | 9/10 | 5006 days | 28% |
| David Mellard | 10/10 | 5007 days | 28% |
| Bruce & Elaine Chote | 10/10 | 5007 days | 28% |
| Paul Nickson | 8/10 | 5007 days | 28% |
| Monique | 8/10 | 5007 days | 28% |
| Beat & Connie | 10/10 | 5009 days | 28% |
| Alex Stil | 9/10 | 5009 days | 28% |
| Pein van Nosrt | 7/10 | 5014 days | 26% |
| Raith | 9/10 | 5014 days | 28% |
| Elise van Haastert | 8/10 | 5014 days | 28% |
| Claudia | 10/10 | 5016 days | 28% |
| Carolin Ranner | 6/10 | 5016 days | 24% |
| Winskowsky | 9/10 | 5017 days | 28% |
| Hvid | 9/10 | 5031 days | 28% |
| Judith K. | 6/10 | 5033 days | 24% |
| Ruben and Jetske | 7/10 | 5033 days | 26% |
| Roy Seymour | 9/10 | 5034 days | 28% |
| Tom Hill | 10/10 | 5038 days | 28% |
| Ruua Reyrink | 7/10 | 5039 days | 26% |
| Patrick Hugener | 9/10 | 5039 days | 28% |
| JohnHaestad | 4/10 | 5043 days | 18% |
| dollimyxture | 10/10 | 5074 days | 28% |
| aggiemary04 | 10/10 | 5166 days | 28% |
| victoriauk | 4/10 | 5288 days | 18% |
| Baumgarten | 8/10 | 5316 days | 28% |
| travelbunnyadventures | 8/10 | 5319 days | 28% |
| Don & Geraldine | 10/10 | 5355 days | 28% |
| Matthias & Ceristiane | 8/10 | 5367 days | 28% |
| Hilary and Chris Ayton | 9/10 | 5368 days | 28% |
| Lis & Rob Tate | 9/10 | 5370 days | 28% |
| ccthornton100 | 10/10 | 5380 days | 28% |
| Bob Kusesia | 10/10 | 5381 days | 28% |
| Yssel de Schepper | 7/10 | 5386 days | 26% |
| Janny Meerdinnk Veldboow | 7/10 | 5386 days | 26% |
| Arie Ascher | 9/10 | 5387 days | 28% |
| Wolfgang Engelke | 10/10 | 5389 days | 28% |
| Thomas K | 9/10 | 5389 days | 28% |
| Loleit | 7/10 | 5401 days | 26% |
| Mattias Thorm | 9/10 | 5402 days | 28% |
| Vincente Garrido | 4/10 | 5403 days | 18% |
| R Gilge | 10/10 | 5404 days | 28% |
| Erik Hummelmose | 8/10 | 5404 days | 28% |
| Ian E | 6/10 | 5404 days | 24% |
| Nadine Schaee | 9/10 | 5405 days | 28% |
| Belinda Godhard | 2/10 | 5405 days | 13% |
| Uwe Rieper | 10/10 | 5407 days | 28% |
| E.M. Prideaux | 10/10 | 5422 days | 28% |
| Elizabeth E | 8/10 | 5424 days | 28% |
| Stevens Frans | 8/10 | 5425 days | 28% |
| Heinrich Hax | 9/10 | 5428 days | 28% |
| tanh | 7/10 | 5455 days | 26% |
| Stephanie Steiner | 8/10 | 5474 days | 28% |
| Julia May | 9/10 | 5481 days | 28% |
| X Neils | 7/10 | 5492 days | 26% |
| Sarah Smith | 5/10 | 5496 days | 22% |
| Anna | 6/10 | 5500 days | 24% |
| OliverG1 | 7/10 | 5702 days | 26% |
| Philipp | 5/10 | 5714 days | 22% |
| JasminA | 5/10 | 5714 days | 22% |
| ChristinaV | 8/10 | 5723 days | 28% |
| JuergenSchnitzer | 9/10 | 5730 days | 28% |
| AstridVG | 7/10 | 5730 days | 26% |
| NatasjaV | 7/10 | 5732 days | 26% |
| JimmyK | 7/10 | 5732 days | 26% |
| MarcoJ | 9/10 | 5734 days | 28% |
| LucyPoland | 9/10 | 5735 days | 28% |
| Stolz | 7/10 | 5737 days | 26% |
| BrzezinskaM | 10/10 | 5739 days | 28% |
| AndreB | 10/10 | 5739 days | 28% |
| Linda | 7/10 | 5745 days | 26% |
| Susan | 8/10 | 5746 days | 28% |
| Byleveld | 7/10 | 5747 days | 26% |
| JoseB | 8/10 | 5748 days | 28% |
| JetteG | 10/10 | 5748 days | 28% |
| CarolF | 7/10 | 5749 days | 26% |
| Rachel | 9/10 | 5763 days | 28% |
| Claire | 7/10 | 5763 days | 26% |
| Denise | 8/10 | 5764 days | 28% |
| Denk | 8/10 | 5776 days | 28% |
| Klalis | 10/10 | 5778 days | 28% |
| Thomas | 4/10 | 5782 days | 18% |
| Mike | 5/10 | 5783 days | 22% |
| Debbie Mossman | 9/10 | 5788 days | 28% |
| Johann | 10/10 | 5790 days | 28% |
| Carina | 10/10 | 5792 days | 28% |
| Mat | 8/10 | 5831 days | 28% |
| Anette | 7/10 | 5833 days | 26% |
| midlands_missus | 8/10 | 5835 days | 28% |
| David | 7/10 | 5891 days | 26% |
| Suyin | 10/10 | 5911 days | 28% |
| Franz | 10/10 | 6085 days | 28% |
| Jennifer Baulch | 7/10 | 6090 days | 26% |
| George Jeffs | 10/10 | 6093 days | 28% |
| Jacob | 9/10 | 6097 days | 28% |
| Aharon | 10/10 | 6112 days | 28% |
| D.A. Mulder | 8/10 | 6113 days | 28% |
| Knol | 8/10 | 6115 days | 28% |
| Cole Penelope | 8/10 | 6118 days | 28% |
| Jody | 7/10 | 6126 days | 26% |
| Anna | 5/10 | 6126 days | 22% |
| Pauline Thai | 8/10 | 6133 days | 28% |
| Dan Adamson | 8/10 | 6133 days | 28% |
| Stephen Brightman | 8/10 | 6142 days | 28% |
| Madeleine Rowland | 8/10 | 6142 days | 28% |
| Bronwyn Gaby | 9/10 | 6160 days | 28% |
| Free_ride | 9/10 | 6175 days | 28% |
| Michael | 9/10 | 6199 days | 28% |
| Raul | 10/10 | 6449 days | 28% |
| TeamFlorida | 9/10 | 6451 days | 28% |
| TeamFlorida | 8/10 | 6451 days | 28% |
| James | 9/10 | 6464 days | 28% |
| Rudi | 10/10 | 6468 days | 28% |
| Rolf Kruger | 10/10 | 6492 days | 28% |
| Brian | 10/10 | 6496 days | 28% |
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 43 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
3.16% 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.