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
83.56%
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 | 3026 days | 100% |
| Dan Coates | 9/10 | 3259 days | 83% |
| Dominik | 9/10 | 3259 days | 83% |
| Holloway | 10/10 | 3282 days | 82% |
| Christina | 6/10 | 3350 days | 66% |
| Barbara Knops | 9/10 | 3352 days | 76% |
| Manu Liberta | 10/10 | 3362 days | 76% |
| Bruno | 9/10 | 3372 days | 74% |
| Kirsty Smith | 10/10 | 3395 days | 73% |
| Sophia Satter | 8/10 | 3406 days | 71% |
| Afiya Levy | 10/10 | 3627 days | 56% |
| Johannes Eisel | 6/10 | 3636 days | 47% |
| Alexander Mattea | 5/10 | 3636 days | 42% |
| Timea Bagosi | 9/10 | 3639 days | 54% |
| Riviere | 8/10 | 3650 days | 53% |
| Dani | 8/10 | 3652 days | 53% |
| Benoit Leclerc | 7/10 | 3654 days | 50% |
| Anna Stoehr | 10/10 | 3672 days | 53% |
| Kai Krchmar | 6/10 | 3725 days | 42% |
| Kristina Farkas | 5/10 | 4020 days | 20% |
| Sophia Kadel | 10/10 | 4050 days | 24% |
| Laura and Marie | 7/10 | 4056 days | 22% |
| Rachel S | 10/10 | 4064 days | 23% |
| Joris Giullemot | 8/10 | 4372 days | 0% |
| Laura Metz | 7/10 | 4383 days | 35% |
| Hubertus Thost | 7/10 | 4383 days | 35% |
| Amanda | 4/10 | 4398 days | 24% |
| S B | 10/10 | 4411 days | 38% |
| M K | 10/10 | 4411 days | 38% |
| Maya Bakker-deDreu | 8/10 | 4419 days | 37% |
| Christin Woelk | 9/10 | 4699 days | 37% |
| Maria Klister | 7/10 | 4719 days | 35% |
| Lydia Kleinkoenen | 9/10 | 4739 days | 37% |
| Jessica Grewe | 9/10 | 4739 days | 37% |
| Hannah Lia-Isis Kubillus | 9/10 | 4739 days | 37% |
| Jan Zimmerman | 8/10 | 4750 days | 37% |
| Margaret and Derek McNeil | 10/10 | 4810 days | 38% |
| Frank and Suzanne | 8/10 | 4825 days | 37% |
| RollingMoon | 8/10 | 4886 days | 37% |
| Marcel & Kim Meichtry | 7/10 | 5106 days | 35% |
| Howell Davies | 5/10 | 5109 days | 29% |
| Baas | 7/10 | 5109 days | 35% |
| Pete & Pat Etheridge | 8/10 | 5109 days | 37% |
| Siegfried Richter | 7/10 | 5110 days | 35% |
| Melanie Mathiak | 10/10 | 5112 days | 38% |
| Sig Schrattner | 8/10 | 5112 days | 37% |
| Rebecca Doehl | 7/10 | 5113 days | 35% |
| Seth & Carla | 7/10 | 5114 days | 35% |
| Gabriele Wendt | 9/10 | 5114 days | 37% |
| Tadej Ferjan | 8/10 | 5114 days | 37% |
| Mary Mitchell | 10/10 | 5114 days | 38% |
| Emily Wikston | 9/10 | 5115 days | 37% |
| Andreas & Leonie Fehr | 10/10 | 5121 days | 38% |
| Horst Langstein | 9/10 | 5122 days | 37% |
| Marco Scheiber | 9/10 | 5123 days | 37% |
| Friedrich Kaltner | 10/10 | 5125 days | 38% |
| Frank & Julia | 10/10 | 5128 days | 38% |
| Thyg Lingdal | 10/10 | 5128 days | 38% |
| Nicole van Bergen | 8/10 | 5128 days | 37% |
| Mike & April Prince | 7/10 | 5142 days | 35% |
| Alfred & Henrike | 8/10 | 5154 days | 37% |
| Lyn Stainton | 6/10 | 5203 days | 32% |
| Ken Talan | 10/10 | 5431 days | 38% |
| Jon_and_Family | 9/10 | 5435 days | 37% |
| Gertz | 10/10 | 5439 days | 38% |
| Katarina Bokor | 8/10 | 5443 days | 37% |
| Mark Franklin | 6/10 | 5443 days | 32% |
| Gordon Agent | 10/10 | 5443 days | 38% |
| Maureen Hardy | 8/10 | 5443 days | 37% |
| AJ van Pelt | 8/10 | 5443 days | 37% |
| Werner and Rita | 9/10 | 5450 days | 37% |
| Richard Dudfield | 10/10 | 5452 days | 38% |
| Sayaka | 7/10 | 5452 days | 35% |
| Urs and Isabella | 7/10 | 5453 days | 35% |
| Juliane Kleiu | 10/10 | 5456 days | 38% |
| Linda Kremer | 9/10 | 5457 days | 37% |
| Rebecca Johnston | 9/10 | 5457 days | 37% |
| David Mellard | 10/10 | 5458 days | 38% |
| Bruce & Elaine Chote | 10/10 | 5458 days | 38% |
| Paul Nickson | 8/10 | 5458 days | 37% |
| Monique | 8/10 | 5458 days | 37% |
| Beat & Connie | 10/10 | 5460 days | 38% |
| Alex Stil | 9/10 | 5460 days | 37% |
| Pein van Nosrt | 7/10 | 5465 days | 35% |
| Raith | 9/10 | 5465 days | 37% |
| Elise van Haastert | 8/10 | 5465 days | 37% |
| Claudia | 10/10 | 5467 days | 38% |
| Carolin Ranner | 6/10 | 5467 days | 32% |
| Winskowsky | 9/10 | 5468 days | 37% |
| Hvid | 9/10 | 5482 days | 37% |
| Judith K. | 6/10 | 5484 days | 32% |
| Ruben and Jetske | 7/10 | 5484 days | 35% |
| Roy Seymour | 9/10 | 5485 days | 37% |
| Tom Hill | 10/10 | 5489 days | 38% |
| Ruua Reyrink | 7/10 | 5490 days | 35% |
| Patrick Hugener | 9/10 | 5490 days | 37% |
| JohnHaestad | 4/10 | 5494 days | 24% |
| dollimyxture | 10/10 | 5525 days | 38% |
| aggiemary04 | 10/10 | 5617 days | 38% |
| victoriauk | 4/10 | 5739 days | 24% |
| Baumgarten | 8/10 | 5767 days | 37% |
| travelbunnyadventures | 8/10 | 5770 days | 37% |
| Don & Geraldine | 10/10 | 5806 days | 38% |
| Matthias & Ceristiane | 8/10 | 5818 days | 37% |
| Hilary and Chris Ayton | 9/10 | 5819 days | 37% |
| Lis & Rob Tate | 9/10 | 5821 days | 37% |
| ccthornton100 | 10/10 | 5831 days | 38% |
| Bob Kusesia | 10/10 | 5832 days | 38% |
| Yssel de Schepper | 7/10 | 5837 days | 35% |
| Janny Meerdinnk Veldboow | 7/10 | 5837 days | 35% |
| Arie Ascher | 9/10 | 5838 days | 37% |
| Wolfgang Engelke | 10/10 | 5840 days | 38% |
| Thomas K | 9/10 | 5840 days | 37% |
| Loleit | 7/10 | 5852 days | 35% |
| Mattias Thorm | 9/10 | 5853 days | 37% |
| Vincente Garrido | 4/10 | 5854 days | 24% |
| R Gilge | 10/10 | 5855 days | 38% |
| Erik Hummelmose | 8/10 | 5855 days | 37% |
| Ian E | 6/10 | 5855 days | 32% |
| Nadine Schaee | 9/10 | 5856 days | 37% |
| Belinda Godhard | 2/10 | 5856 days | 17% |
| Uwe Rieper | 10/10 | 5858 days | 38% |
| E.M. Prideaux | 10/10 | 5873 days | 38% |
| Elizabeth E | 8/10 | 5875 days | 37% |
| Stevens Frans | 8/10 | 5876 days | 37% |
| Heinrich Hax | 9/10 | 5879 days | 37% |
| tanh | 7/10 | 5906 days | 35% |
| Stephanie Steiner | 8/10 | 5925 days | 37% |
| Julia May | 9/10 | 5932 days | 37% |
| X Neils | 7/10 | 5943 days | 35% |
| Sarah Smith | 5/10 | 5947 days | 29% |
| Anna | 6/10 | 5951 days | 32% |
| OliverG1 | 7/10 | 6153 days | 35% |
| Philipp | 5/10 | 6165 days | 29% |
| JasminA | 5/10 | 6165 days | 29% |
| ChristinaV | 8/10 | 6175 days | 37% |
| JuergenSchnitzer | 9/10 | 6181 days | 37% |
| AstridVG | 7/10 | 6182 days | 35% |
| NatasjaV | 7/10 | 6183 days | 35% |
| JimmyK | 7/10 | 6183 days | 35% |
| MarcoJ | 9/10 | 6185 days | 37% |
| LucyPoland | 9/10 | 6186 days | 37% |
| Stolz | 7/10 | 6189 days | 35% |
| BrzezinskaM | 10/10 | 6190 days | 38% |
| AndreB | 10/10 | 6190 days | 38% |
| Linda | 7/10 | 6197 days | 35% |
| Susan | 8/10 | 6198 days | 37% |
| Byleveld | 7/10 | 6198 days | 35% |
| JoseB | 8/10 | 6199 days | 37% |
| JetteG | 10/10 | 6199 days | 38% |
| CarolF | 7/10 | 6200 days | 35% |
| Rachel | 9/10 | 6215 days | 37% |
| Claire | 7/10 | 6215 days | 35% |
| Denise | 8/10 | 6216 days | 37% |
| Denk | 8/10 | 6227 days | 37% |
| Klalis | 10/10 | 6230 days | 38% |
| Thomas | 4/10 | 6233 days | 24% |
| Mike | 5/10 | 6234 days | 29% |
| Debbie Mossman | 9/10 | 6240 days | 37% |
| Johann | 10/10 | 6242 days | 38% |
| Carina | 10/10 | 6244 days | 38% |
| Mat | 8/10 | 6282 days | 37% |
| Anette | 7/10 | 6285 days | 35% |
| midlands_missus | 8/10 | 6287 days | 37% |
| David | 7/10 | 6343 days | 35% |
| Suyin | 10/10 | 6363 days | 38% |
| Franz | 10/10 | 6536 days | 38% |
| Jennifer Baulch | 7/10 | 6541 days | 35% |
| George Jeffs | 10/10 | 6544 days | 38% |
| Jacob | 9/10 | 6548 days | 37% |
| Aharon | 10/10 | 6563 days | 38% |
| D.A. Mulder | 8/10 | 6564 days | 37% |
| Knol | 8/10 | 6566 days | 37% |
| Cole Penelope | 8/10 | 6569 days | 37% |
| Jody | 7/10 | 6577 days | 35% |
| Anna | 5/10 | 6577 days | 29% |
| Pauline Thai | 8/10 | 6584 days | 37% |
| Dan Adamson | 8/10 | 6584 days | 37% |
| Stephen Brightman | 8/10 | 6593 days | 37% |
| Madeleine Rowland | 8/10 | 6593 days | 37% |
| Bronwyn Gaby | 9/10 | 6611 days | 37% |
| Free_ride | 9/10 | 6627 days | 37% |
| Michael | 9/10 | 6650 days | 37% |
| Raul | 10/10 | 6900 days | 38% |
| TeamFlorida | 9/10 | 6902 days | 37% |
| TeamFlorida | 8/10 | 6902 days | 37% |
| James | 9/10 | 6915 days | 37% |
| Rudi | 10/10 | 6919 days | 38% |
| Rolf Kruger | 10/10 | 6943 days | 38% |
| Brian | 10/10 | 6947 days | 38% |
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
-4.15% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 52 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 | -4.09% |
| 198 | -4.11% |
| 199 | -4.13% |
| 200 | -4.15% |
| 201 | -4.17% |
| 202 | -4.19% |
| 203 | -4.21% |
| … | … |
Balancing Adjustment
3.17% 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.