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
83.48%
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 | 2574 days | 100% |
| Dan Coates | 9/10 | 2807 days | 87% |
| Dominik | 9/10 | 2807 days | 87% |
| Holloway | 10/10 | 2830 days | 87% |
| Christina | 6/10 | 2898 days | 71% |
| Barbara Knops | 9/10 | 2900 days | 82% |
| Manu Liberta | 10/10 | 2910 days | 82% |
| Bruno | 9/10 | 2920 days | 81% |
| Kirsty Smith | 10/10 | 2943 days | 80% |
| Sophia Satter | 8/10 | 2954 days | 78% |
| Afiya Levy | 10/10 | 3175 days | 67% |
| Johannes Eisel | 6/10 | 3184 days | 57% |
| Alexander Mattea | 5/10 | 3184 days | 51% |
| Timea Bagosi | 9/10 | 3187 days | 66% |
| Riviere | 8/10 | 3198 days | 65% |
| Dani | 8/10 | 3200 days | 65% |
| Benoit Leclerc | 7/10 | 3202 days | 61% |
| Anna Stoehr | 10/10 | 3220 days | 65% |
| Kai Krchmar | 6/10 | 3273 days | 53% |
| Kristina Farkas | 5/10 | 3568 days | 34% |
| Sophia Kadel | 10/10 | 3598 days | 44% |
| Laura and Marie | 7/10 | 3604 days | 40% |
| Rachel S | 10/10 | 3612 days | 43% |
| Joris Giullemot | 8/10 | 3920 days | 25% |
| Laura Metz | 7/10 | 3931 days | 23% |
| Hubertus Thost | 7/10 | 3931 days | 23% |
| Amanda | 4/10 | 3946 days | 16% |
| S B | 10/10 | 3959 days | 23% |
| M K | 10/10 | 3959 days | 23% |
| Maya Bakker-deDreu | 8/10 | 3967 days | 22% |
| Christin Woelk | 9/10 | 4247 days | 7% |
| Maria Klister | 7/10 | 4267 days | 6% |
| Lydia Kleinkoenen | 9/10 | 4287 days | 5% |
| Jessica Grewe | 9/10 | 4287 days | 5% |
| Hannah Lia-Isis Kubillus | 9/10 | 4287 days | 5% |
| Jan Zimmerman | 8/10 | 4298 days | 4% |
| Margaret and Derek McNeil | 10/10 | 4358 days | 1% |
| Frank and Suzanne | 8/10 | 4373 days | 0% |
| RollingMoon | 8/10 | 4434 days | 28% |
| Marcel & Kim Meichtry | 7/10 | 4654 days | 26% |
| Howell Davies | 5/10 | 4657 days | 21% |
| Baas | 7/10 | 4657 days | 26% |
| Pete & Pat Etheridge | 8/10 | 4657 days | 28% |
| Siegfried Richter | 7/10 | 4658 days | 26% |
| Melanie Mathiak | 10/10 | 4660 days | 28% |
| Sig Schrattner | 8/10 | 4660 days | 28% |
| Rebecca Doehl | 7/10 | 4661 days | 26% |
| Seth & Carla | 7/10 | 4662 days | 26% |
| Gabriele Wendt | 9/10 | 4662 days | 28% |
| Tadej Ferjan | 8/10 | 4662 days | 28% |
| Mary Mitchell | 10/10 | 4662 days | 28% |
| Emily Wikston | 9/10 | 4663 days | 28% |
| Andreas & Leonie Fehr | 10/10 | 4669 days | 28% |
| Horst Langstein | 9/10 | 4670 days | 28% |
| Marco Scheiber | 9/10 | 4671 days | 28% |
| Friedrich Kaltner | 10/10 | 4673 days | 28% |
| Frank & Julia | 10/10 | 4676 days | 28% |
| Thyg Lingdal | 10/10 | 4676 days | 28% |
| Nicole van Bergen | 8/10 | 4676 days | 28% |
| Mike & April Prince | 7/10 | 4690 days | 26% |
| Alfred & Henrike | 8/10 | 4702 days | 28% |
| Lyn Stainton | 6/10 | 4751 days | 24% |
| Ken Talan | 10/10 | 4979 days | 28% |
| Jon_and_Family | 9/10 | 4983 days | 28% |
| Gertz | 10/10 | 4987 days | 28% |
| Katarina Bokor | 8/10 | 4991 days | 28% |
| Mark Franklin | 6/10 | 4991 days | 24% |
| Gordon Agent | 10/10 | 4991 days | 28% |
| Maureen Hardy | 8/10 | 4991 days | 28% |
| AJ van Pelt | 8/10 | 4991 days | 28% |
| Werner and Rita | 9/10 | 4998 days | 28% |
| Richard Dudfield | 10/10 | 5000 days | 28% |
| Sayaka | 7/10 | 5000 days | 26% |
| Urs and Isabella | 7/10 | 5001 days | 26% |
| Juliane Kleiu | 10/10 | 5004 days | 28% |
| Linda Kremer | 9/10 | 5005 days | 28% |
| Rebecca Johnston | 9/10 | 5005 days | 28% |
| David Mellard | 10/10 | 5006 days | 28% |
| Bruce & Elaine Chote | 10/10 | 5006 days | 28% |
| Paul Nickson | 8/10 | 5006 days | 28% |
| Monique | 8/10 | 5006 days | 28% |
| Beat & Connie | 10/10 | 5008 days | 28% |
| Alex Stil | 9/10 | 5008 days | 28% |
| Pein van Nosrt | 7/10 | 5013 days | 26% |
| Raith | 9/10 | 5013 days | 28% |
| Elise van Haastert | 8/10 | 5013 days | 28% |
| Claudia | 10/10 | 5015 days | 28% |
| Carolin Ranner | 6/10 | 5015 days | 24% |
| Winskowsky | 9/10 | 5016 days | 28% |
| Hvid | 9/10 | 5030 days | 28% |
| Judith K. | 6/10 | 5032 days | 24% |
| Ruben and Jetske | 7/10 | 5032 days | 26% |
| Roy Seymour | 9/10 | 5033 days | 28% |
| Tom Hill | 10/10 | 5037 days | 28% |
| Ruua Reyrink | 7/10 | 5038 days | 26% |
| Patrick Hugener | 9/10 | 5038 days | 28% |
| JohnHaestad | 4/10 | 5042 days | 18% |
| dollimyxture | 10/10 | 5073 days | 28% |
| aggiemary04 | 10/10 | 5165 days | 28% |
| victoriauk | 4/10 | 5287 days | 18% |
| Baumgarten | 8/10 | 5315 days | 28% |
| travelbunnyadventures | 8/10 | 5318 days | 28% |
| Don & Geraldine | 10/10 | 5354 days | 28% |
| Matthias & Ceristiane | 8/10 | 5366 days | 28% |
| Hilary and Chris Ayton | 9/10 | 5367 days | 28% |
| Lis & Rob Tate | 9/10 | 5369 days | 28% |
| ccthornton100 | 10/10 | 5379 days | 28% |
| Bob Kusesia | 10/10 | 5380 days | 28% |
| Yssel de Schepper | 7/10 | 5385 days | 26% |
| Janny Meerdinnk Veldboow | 7/10 | 5385 days | 26% |
| Arie Ascher | 9/10 | 5386 days | 28% |
| Wolfgang Engelke | 10/10 | 5388 days | 28% |
| Thomas K | 9/10 | 5388 days | 28% |
| Loleit | 7/10 | 5400 days | 26% |
| Mattias Thorm | 9/10 | 5401 days | 28% |
| Vincente Garrido | 4/10 | 5402 days | 18% |
| R Gilge | 10/10 | 5403 days | 28% |
| Erik Hummelmose | 8/10 | 5403 days | 28% |
| Ian E | 6/10 | 5403 days | 24% |
| Nadine Schaee | 9/10 | 5404 days | 28% |
| Belinda Godhard | 2/10 | 5404 days | 13% |
| Uwe Rieper | 10/10 | 5406 days | 28% |
| E.M. Prideaux | 10/10 | 5421 days | 28% |
| Elizabeth E | 8/10 | 5423 days | 28% |
| Stevens Frans | 8/10 | 5424 days | 28% |
| Heinrich Hax | 9/10 | 5427 days | 28% |
| tanh | 7/10 | 5454 days | 26% |
| Stephanie Steiner | 8/10 | 5473 days | 28% |
| Julia May | 9/10 | 5480 days | 28% |
| X Neils | 7/10 | 5491 days | 26% |
| Sarah Smith | 5/10 | 5495 days | 21% |
| Anna | 6/10 | 5499 days | 24% |
| OliverG1 | 7/10 | 5701 days | 26% |
| Philipp | 5/10 | 5713 days | 21% |
| JasminA | 5/10 | 5713 days | 21% |
| ChristinaV | 8/10 | 5723 days | 28% |
| JuergenSchnitzer | 9/10 | 5729 days | 28% |
| AstridVG | 7/10 | 5730 days | 26% |
| NatasjaV | 7/10 | 5731 days | 26% |
| JimmyK | 7/10 | 5731 days | 26% |
| MarcoJ | 9/10 | 5733 days | 28% |
| LucyPoland | 9/10 | 5734 days | 28% |
| Stolz | 7/10 | 5737 days | 26% |
| BrzezinskaM | 10/10 | 5738 days | 28% |
| AndreB | 10/10 | 5738 days | 28% |
| Linda | 7/10 | 5745 days | 26% |
| Susan | 8/10 | 5746 days | 28% |
| Byleveld | 7/10 | 5746 days | 26% |
| JoseB | 8/10 | 5747 days | 28% |
| JetteG | 10/10 | 5747 days | 28% |
| CarolF | 7/10 | 5748 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 | 21% |
| 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 | 6084 days | 28% |
| Jennifer Baulch | 7/10 | 6089 days | 26% |
| George Jeffs | 10/10 | 6092 days | 28% |
| Jacob | 9/10 | 6096 days | 28% |
| Aharon | 10/10 | 6111 days | 28% |
| D.A. Mulder | 8/10 | 6112 days | 28% |
| Knol | 8/10 | 6114 days | 28% |
| Cole Penelope | 8/10 | 6117 days | 28% |
| Jody | 7/10 | 6125 days | 26% |
| Anna | 5/10 | 6125 days | 21% |
| Pauline Thai | 8/10 | 6132 days | 28% |
| Dan Adamson | 8/10 | 6132 days | 28% |
| Stephen Brightman | 8/10 | 6141 days | 28% |
| Madeleine Rowland | 8/10 | 6141 days | 28% |
| Bronwyn Gaby | 9/10 | 6159 days | 28% |
| Free_ride | 9/10 | 6175 days | 28% |
| Michael | 9/10 | 6198 days | 28% |
| Raul | 10/10 | 6448 days | 28% |
| TeamFlorida | 9/10 | 6450 days | 28% |
| TeamFlorida | 8/10 | 6450 days | 28% |
| James | 9/10 | 6463 days | 28% |
| Rudi | 10/10 | 6467 days | 28% |
| Rolf Kruger | 10/10 | 6491 days | 28% |
| Brian | 10/10 | 6495 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.