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
83.69%
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 | 3022 days | 100% |
| Dan Coates | 9/10 | 3255 days | 83% |
| Dominik | 9/10 | 3255 days | 83% |
| Holloway | 10/10 | 3278 days | 82% |
| Christina | 6/10 | 3346 days | 66% |
| Barbara Knops | 9/10 | 3348 days | 76% |
| Manu Liberta | 10/10 | 3358 days | 76% |
| Bruno | 9/10 | 3368 days | 75% |
| Kirsty Smith | 10/10 | 3391 days | 74% |
| Sophia Satter | 8/10 | 3402 days | 71% |
| Afiya Levy | 10/10 | 3623 days | 56% |
| Johannes Eisel | 6/10 | 3632 days | 48% |
| Alexander Mattea | 5/10 | 3632 days | 42% |
| Timea Bagosi | 9/10 | 3634 days | 55% |
| Riviere | 8/10 | 3646 days | 53% |
| Dani | 8/10 | 3648 days | 53% |
| Benoit Leclerc | 7/10 | 3650 days | 50% |
| Anna Stoehr | 10/10 | 3668 days | 53% |
| Kai Krchmar | 6/10 | 3721 days | 42% |
| Kristina Farkas | 5/10 | 4016 days | 21% |
| Sophia Kadel | 10/10 | 4046 days | 25% |
| Laura and Marie | 7/10 | 4052 days | 23% |
| Rachel S | 10/10 | 4059 days | 24% |
| Joris Giullemot | 8/10 | 4368 days | 1% |
| Laura Metz | 7/10 | 4379 days | 0% |
| Hubertus Thost | 7/10 | 4379 days | 0% |
| Amanda | 4/10 | 4394 days | 25% |
| S B | 10/10 | 4407 days | 38% |
| M K | 10/10 | 4407 days | 38% |
| Maya Bakker-deDreu | 8/10 | 4415 days | 37% |
| Christin Woelk | 9/10 | 4695 days | 38% |
| Maria Klister | 7/10 | 4715 days | 35% |
| Lydia Kleinkoenen | 9/10 | 4735 days | 38% |
| Jessica Grewe | 9/10 | 4735 days | 38% |
| Hannah Lia-Isis Kubillus | 9/10 | 4735 days | 38% |
| Jan Zimmerman | 8/10 | 4746 days | 37% |
| Margaret and Derek McNeil | 10/10 | 4806 days | 38% |
| Frank and Suzanne | 8/10 | 4821 days | 37% |
| RollingMoon | 8/10 | 4882 days | 37% |
| Marcel & Kim Meichtry | 7/10 | 5102 days | 35% |
| Howell Davies | 5/10 | 5105 days | 29% |
| Baas | 7/10 | 5105 days | 35% |
| Pete & Pat Etheridge | 8/10 | 5105 days | 37% |
| Siegfried Richter | 7/10 | 5106 days | 35% |
| Melanie Mathiak | 10/10 | 5108 days | 38% |
| Sig Schrattner | 8/10 | 5108 days | 37% |
| Rebecca Doehl | 7/10 | 5109 days | 35% |
| Seth & Carla | 7/10 | 5110 days | 35% |
| Gabriele Wendt | 9/10 | 5110 days | 38% |
| Tadej Ferjan | 8/10 | 5110 days | 37% |
| Mary Mitchell | 10/10 | 5110 days | 38% |
| Emily Wikston | 9/10 | 5111 days | 38% |
| Andreas & Leonie Fehr | 10/10 | 5117 days | 38% |
| Horst Langstein | 9/10 | 5118 days | 38% |
| Marco Scheiber | 9/10 | 5119 days | 38% |
| Friedrich Kaltner | 10/10 | 5121 days | 38% |
| Frank & Julia | 10/10 | 5124 days | 38% |
| Thyg Lingdal | 10/10 | 5124 days | 38% |
| Nicole van Bergen | 8/10 | 5124 days | 37% |
| Mike & April Prince | 7/10 | 5138 days | 35% |
| Alfred & Henrike | 8/10 | 5150 days | 37% |
| Lyn Stainton | 6/10 | 5199 days | 33% |
| Ken Talan | 10/10 | 5427 days | 38% |
| Jon_and_Family | 9/10 | 5431 days | 38% |
| Gertz | 10/10 | 5435 days | 38% |
| Katarina Bokor | 8/10 | 5439 days | 37% |
| Mark Franklin | 6/10 | 5439 days | 33% |
| Gordon Agent | 10/10 | 5439 days | 38% |
| Maureen Hardy | 8/10 | 5439 days | 37% |
| AJ van Pelt | 8/10 | 5439 days | 37% |
| Werner and Rita | 9/10 | 5446 days | 38% |
| Richard Dudfield | 10/10 | 5448 days | 38% |
| Sayaka | 7/10 | 5448 days | 35% |
| Urs and Isabella | 7/10 | 5449 days | 35% |
| Juliane Kleiu | 10/10 | 5452 days | 38% |
| Linda Kremer | 9/10 | 5453 days | 38% |
| Rebecca Johnston | 9/10 | 5453 days | 38% |
| David Mellard | 10/10 | 5454 days | 38% |
| Bruce & Elaine Chote | 10/10 | 5454 days | 38% |
| Paul Nickson | 8/10 | 5454 days | 37% |
| Monique | 8/10 | 5454 days | 37% |
| Beat & Connie | 10/10 | 5456 days | 38% |
| Alex Stil | 9/10 | 5456 days | 38% |
| Pein van Nosrt | 7/10 | 5461 days | 35% |
| Raith | 9/10 | 5461 days | 38% |
| Elise van Haastert | 8/10 | 5461 days | 37% |
| Claudia | 10/10 | 5463 days | 38% |
| Carolin Ranner | 6/10 | 5463 days | 33% |
| Winskowsky | 9/10 | 5464 days | 38% |
| Hvid | 9/10 | 5478 days | 38% |
| Judith K. | 6/10 | 5480 days | 33% |
| Ruben and Jetske | 7/10 | 5480 days | 35% |
| Roy Seymour | 9/10 | 5481 days | 38% |
| Tom Hill | 10/10 | 5485 days | 38% |
| Ruua Reyrink | 7/10 | 5486 days | 35% |
| Patrick Hugener | 9/10 | 5486 days | 38% |
| JohnHaestad | 4/10 | 5490 days | 25% |
| dollimyxture | 10/10 | 5521 days | 38% |
| aggiemary04 | 10/10 | 5613 days | 38% |
| victoriauk | 4/10 | 5735 days | 25% |
| Baumgarten | 8/10 | 5763 days | 37% |
| travelbunnyadventures | 8/10 | 5766 days | 37% |
| Don & Geraldine | 10/10 | 5802 days | 38% |
| Matthias & Ceristiane | 8/10 | 5814 days | 37% |
| Hilary and Chris Ayton | 9/10 | 5815 days | 38% |
| Lis & Rob Tate | 9/10 | 5817 days | 38% |
| ccthornton100 | 10/10 | 5827 days | 38% |
| Bob Kusesia | 10/10 | 5828 days | 38% |
| Yssel de Schepper | 7/10 | 5833 days | 35% |
| Janny Meerdinnk Veldboow | 7/10 | 5833 days | 35% |
| Arie Ascher | 9/10 | 5834 days | 38% |
| Wolfgang Engelke | 10/10 | 5836 days | 38% |
| Thomas K | 9/10 | 5836 days | 38% |
| Loleit | 7/10 | 5848 days | 35% |
| Mattias Thorm | 9/10 | 5849 days | 38% |
| Vincente Garrido | 4/10 | 5850 days | 25% |
| R Gilge | 10/10 | 5851 days | 38% |
| Erik Hummelmose | 8/10 | 5851 days | 37% |
| Ian E | 6/10 | 5851 days | 33% |
| Nadine Schaee | 9/10 | 5852 days | 38% |
| Belinda Godhard | 2/10 | 5852 days | 17% |
| Uwe Rieper | 10/10 | 5854 days | 38% |
| E.M. Prideaux | 10/10 | 5869 days | 38% |
| Elizabeth E | 8/10 | 5871 days | 37% |
| Stevens Frans | 8/10 | 5872 days | 37% |
| Heinrich Hax | 9/10 | 5875 days | 38% |
| tanh | 7/10 | 5902 days | 35% |
| Stephanie Steiner | 8/10 | 5921 days | 37% |
| Julia May | 9/10 | 5928 days | 38% |
| X Neils | 7/10 | 5939 days | 35% |
| Sarah Smith | 5/10 | 5943 days | 29% |
| Anna | 6/10 | 5947 days | 33% |
| OliverG1 | 7/10 | 6149 days | 35% |
| Philipp | 5/10 | 6161 days | 29% |
| JasminA | 5/10 | 6161 days | 29% |
| ChristinaV | 8/10 | 6170 days | 37% |
| JuergenSchnitzer | 9/10 | 6177 days | 38% |
| AstridVG | 7/10 | 6177 days | 35% |
| NatasjaV | 7/10 | 6179 days | 35% |
| JimmyK | 7/10 | 6179 days | 35% |
| MarcoJ | 9/10 | 6181 days | 38% |
| LucyPoland | 9/10 | 6182 days | 38% |
| Stolz | 7/10 | 6184 days | 35% |
| BrzezinskaM | 10/10 | 6186 days | 38% |
| AndreB | 10/10 | 6186 days | 38% |
| Linda | 7/10 | 6192 days | 35% |
| Susan | 8/10 | 6193 days | 37% |
| Byleveld | 7/10 | 6194 days | 35% |
| JoseB | 8/10 | 6195 days | 37% |
| JetteG | 10/10 | 6195 days | 38% |
| CarolF | 7/10 | 6196 days | 35% |
| Rachel | 9/10 | 6210 days | 38% |
| Claire | 7/10 | 6210 days | 35% |
| Denise | 8/10 | 6211 days | 37% |
| Denk | 8/10 | 6223 days | 37% |
| Klalis | 10/10 | 6225 days | 38% |
| Thomas | 4/10 | 6229 days | 25% |
| Mike | 5/10 | 6230 days | 29% |
| Debbie Mossman | 9/10 | 6236 days | 38% |
| Johann | 10/10 | 6237 days | 38% |
| Carina | 10/10 | 6239 days | 38% |
| Mat | 8/10 | 6278 days | 37% |
| Anette | 7/10 | 6280 days | 35% |
| midlands_missus | 8/10 | 6283 days | 37% |
| David | 7/10 | 6338 days | 35% |
| Suyin | 10/10 | 6358 days | 38% |
| Franz | 10/10 | 6532 days | 38% |
| Jennifer Baulch | 7/10 | 6537 days | 35% |
| George Jeffs | 10/10 | 6540 days | 38% |
| Jacob | 9/10 | 6544 days | 38% |
| Aharon | 10/10 | 6559 days | 38% |
| D.A. Mulder | 8/10 | 6560 days | 37% |
| Knol | 8/10 | 6562 days | 37% |
| Cole Penelope | 8/10 | 6565 days | 37% |
| Jody | 7/10 | 6573 days | 35% |
| Anna | 5/10 | 6573 days | 29% |
| Pauline Thai | 8/10 | 6580 days | 37% |
| Dan Adamson | 8/10 | 6580 days | 37% |
| Stephen Brightman | 8/10 | 6589 days | 37% |
| Madeleine Rowland | 8/10 | 6589 days | 37% |
| Bronwyn Gaby | 9/10 | 6607 days | 38% |
| Free_ride | 9/10 | 6623 days | 38% |
| Michael | 9/10 | 6646 days | 38% |
| Raul | 10/10 | 6896 days | 38% |
| TeamFlorida | 9/10 | 6898 days | 38% |
| TeamFlorida | 8/10 | 6898 days | 37% |
| James | 9/10 | 6911 days | 38% |
| Rudi | 10/10 | 6915 days | 38% |
| Rolf Kruger | 10/10 | 6939 days | 38% |
| Brian | 10/10 | 6943 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 | -4.18% |
| 202 | -4.20% |
| 203 | -4.22% |
| … | … |
Balancing Adjustment
3.13% 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.