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 | 3029 days | 100% |
| Dan Coates | 9/10 | 3262 days | 83% |
| Dominik | 9/10 | 3262 days | 83% |
| Holloway | 10/10 | 3285 days | 82% |
| Christina | 6/10 | 3353 days | 66% |
| Barbara Knops | 9/10 | 3355 days | 76% |
| Manu Liberta | 10/10 | 3365 days | 76% |
| Bruno | 9/10 | 3375 days | 74% |
| Kirsty Smith | 10/10 | 3398 days | 73% |
| Sophia Satter | 8/10 | 3409 days | 71% |
| Afiya Levy | 10/10 | 3630 days | 56% |
| Johannes Eisel | 6/10 | 3639 days | 48% |
| Alexander Mattea | 5/10 | 3639 days | 42% |
| Timea Bagosi | 9/10 | 3642 days | 54% |
| Riviere | 8/10 | 3653 days | 53% |
| Dani | 8/10 | 3655 days | 53% |
| Benoit Leclerc | 7/10 | 3657 days | 50% |
| Anna Stoehr | 10/10 | 3675 days | 53% |
| Kai Krchmar | 6/10 | 3728 days | 42% |
| Kristina Farkas | 5/10 | 4023 days | 20% |
| Sophia Kadel | 10/10 | 4053 days | 24% |
| Laura and Marie | 7/10 | 4059 days | 22% |
| Rachel S | 10/10 | 4067 days | 23% |
| Joris Giullemot | 8/10 | 4375 days | 0% |
| Laura Metz | 7/10 | 4386 days | 35% |
| Hubertus Thost | 7/10 | 4386 days | 35% |
| Amanda | 4/10 | 4401 days | 25% |
| S B | 10/10 | 4414 days | 38% |
| M K | 10/10 | 4414 days | 38% |
| Maya Bakker-deDreu | 8/10 | 4422 days | 37% |
| Christin Woelk | 9/10 | 4702 days | 38% |
| Maria Klister | 7/10 | 4722 days | 35% |
| Lydia Kleinkoenen | 9/10 | 4742 days | 38% |
| Jessica Grewe | 9/10 | 4742 days | 38% |
| Hannah Lia-Isis Kubillus | 9/10 | 4742 days | 38% |
| Jan Zimmerman | 8/10 | 4753 days | 37% |
| Margaret and Derek McNeil | 10/10 | 4813 days | 38% |
| Frank and Suzanne | 8/10 | 4828 days | 37% |
| RollingMoon | 8/10 | 4889 days | 37% |
| Marcel & Kim Meichtry | 7/10 | 5109 days | 35% |
| Howell Davies | 5/10 | 5112 days | 29% |
| Baas | 7/10 | 5112 days | 35% |
| Pete & Pat Etheridge | 8/10 | 5112 days | 37% |
| Siegfried Richter | 7/10 | 5113 days | 35% |
| Melanie Mathiak | 10/10 | 5115 days | 38% |
| Sig Schrattner | 8/10 | 5115 days | 37% |
| Rebecca Doehl | 7/10 | 5116 days | 35% |
| Seth & Carla | 7/10 | 5117 days | 35% |
| Gabriele Wendt | 9/10 | 5117 days | 38% |
| Tadej Ferjan | 8/10 | 5117 days | 37% |
| Mary Mitchell | 10/10 | 5117 days | 38% |
| Emily Wikston | 9/10 | 5118 days | 38% |
| Andreas & Leonie Fehr | 10/10 | 5124 days | 38% |
| Horst Langstein | 9/10 | 5125 days | 38% |
| Marco Scheiber | 9/10 | 5126 days | 38% |
| Friedrich Kaltner | 10/10 | 5128 days | 38% |
| Frank & Julia | 10/10 | 5131 days | 38% |
| Thyg Lingdal | 10/10 | 5131 days | 38% |
| Nicole van Bergen | 8/10 | 5131 days | 37% |
| Mike & April Prince | 7/10 | 5145 days | 35% |
| Alfred & Henrike | 8/10 | 5157 days | 37% |
| Lyn Stainton | 6/10 | 5206 days | 33% |
| Ken Talan | 10/10 | 5434 days | 38% |
| Jon_and_Family | 9/10 | 5438 days | 38% |
| Gertz | 10/10 | 5442 days | 38% |
| Katarina Bokor | 8/10 | 5446 days | 37% |
| Mark Franklin | 6/10 | 5446 days | 33% |
| Gordon Agent | 10/10 | 5446 days | 38% |
| Maureen Hardy | 8/10 | 5446 days | 37% |
| AJ van Pelt | 8/10 | 5446 days | 37% |
| Werner and Rita | 9/10 | 5453 days | 38% |
| Richard Dudfield | 10/10 | 5455 days | 38% |
| Sayaka | 7/10 | 5455 days | 35% |
| Urs and Isabella | 7/10 | 5456 days | 35% |
| Juliane Kleiu | 10/10 | 5459 days | 38% |
| Linda Kremer | 9/10 | 5460 days | 38% |
| Rebecca Johnston | 9/10 | 5460 days | 38% |
| David Mellard | 10/10 | 5461 days | 38% |
| Bruce & Elaine Chote | 10/10 | 5461 days | 38% |
| Paul Nickson | 8/10 | 5461 days | 37% |
| Monique | 8/10 | 5461 days | 37% |
| Beat & Connie | 10/10 | 5463 days | 38% |
| Alex Stil | 9/10 | 5463 days | 38% |
| Pein van Nosrt | 7/10 | 5468 days | 35% |
| Raith | 9/10 | 5468 days | 38% |
| Elise van Haastert | 8/10 | 5468 days | 37% |
| Claudia | 10/10 | 5470 days | 38% |
| Carolin Ranner | 6/10 | 5470 days | 33% |
| Winskowsky | 9/10 | 5471 days | 38% |
| Hvid | 9/10 | 5485 days | 38% |
| Judith K. | 6/10 | 5487 days | 33% |
| Ruben and Jetske | 7/10 | 5487 days | 35% |
| Roy Seymour | 9/10 | 5488 days | 38% |
| Tom Hill | 10/10 | 5492 days | 38% |
| Ruua Reyrink | 7/10 | 5493 days | 35% |
| Patrick Hugener | 9/10 | 5493 days | 38% |
| JohnHaestad | 4/10 | 5497 days | 25% |
| dollimyxture | 10/10 | 5528 days | 38% |
| aggiemary04 | 10/10 | 5620 days | 38% |
| victoriauk | 4/10 | 5742 days | 25% |
| Baumgarten | 8/10 | 5770 days | 37% |
| travelbunnyadventures | 8/10 | 5773 days | 37% |
| Don & Geraldine | 10/10 | 5809 days | 38% |
| Matthias & Ceristiane | 8/10 | 5821 days | 37% |
| Hilary and Chris Ayton | 9/10 | 5822 days | 38% |
| Lis & Rob Tate | 9/10 | 5824 days | 38% |
| ccthornton100 | 10/10 | 5834 days | 38% |
| Bob Kusesia | 10/10 | 5835 days | 38% |
| Yssel de Schepper | 7/10 | 5840 days | 35% |
| Janny Meerdinnk Veldboow | 7/10 | 5840 days | 35% |
| Arie Ascher | 9/10 | 5841 days | 38% |
| Wolfgang Engelke | 10/10 | 5843 days | 38% |
| Thomas K | 9/10 | 5843 days | 38% |
| Loleit | 7/10 | 5855 days | 35% |
| Mattias Thorm | 9/10 | 5856 days | 38% |
| Vincente Garrido | 4/10 | 5857 days | 25% |
| R Gilge | 10/10 | 5858 days | 38% |
| Erik Hummelmose | 8/10 | 5858 days | 37% |
| Ian E | 6/10 | 5858 days | 33% |
| Nadine Schaee | 9/10 | 5859 days | 38% |
| Belinda Godhard | 2/10 | 5859 days | 17% |
| Uwe Rieper | 10/10 | 5861 days | 38% |
| E.M. Prideaux | 10/10 | 5876 days | 38% |
| Elizabeth E | 8/10 | 5878 days | 37% |
| Stevens Frans | 8/10 | 5879 days | 37% |
| Heinrich Hax | 9/10 | 5882 days | 38% |
| tanh | 7/10 | 5909 days | 35% |
| Stephanie Steiner | 8/10 | 5928 days | 37% |
| Julia May | 9/10 | 5935 days | 38% |
| X Neils | 7/10 | 5946 days | 35% |
| Sarah Smith | 5/10 | 5950 days | 29% |
| Anna | 6/10 | 5954 days | 33% |
| OliverG1 | 7/10 | 6156 days | 35% |
| Philipp | 5/10 | 6168 days | 29% |
| JasminA | 5/10 | 6168 days | 29% |
| ChristinaV | 8/10 | 6178 days | 37% |
| JuergenSchnitzer | 9/10 | 6184 days | 38% |
| AstridVG | 7/10 | 6184 days | 35% |
| NatasjaV | 7/10 | 6186 days | 35% |
| JimmyK | 7/10 | 6186 days | 35% |
| MarcoJ | 9/10 | 6188 days | 38% |
| LucyPoland | 9/10 | 6189 days | 38% |
| Stolz | 7/10 | 6192 days | 35% |
| BrzezinskaM | 10/10 | 6193 days | 38% |
| AndreB | 10/10 | 6193 days | 38% |
| Linda | 7/10 | 6200 days | 35% |
| Susan | 8/10 | 6200 days | 37% |
| Byleveld | 7/10 | 6201 days | 35% |
| JoseB | 8/10 | 6202 days | 37% |
| JetteG | 10/10 | 6202 days | 38% |
| CarolF | 7/10 | 6203 days | 35% |
| Rachel | 9/10 | 6217 days | 38% |
| Claire | 7/10 | 6217 days | 35% |
| Denise | 8/10 | 6219 days | 37% |
| Denk | 8/10 | 6230 days | 37% |
| Klalis | 10/10 | 6233 days | 38% |
| Thomas | 4/10 | 6236 days | 25% |
| Mike | 5/10 | 6237 days | 29% |
| Debbie Mossman | 9/10 | 6243 days | 38% |
| Johann | 10/10 | 6245 days | 38% |
| Carina | 10/10 | 6246 days | 38% |
| Mat | 8/10 | 6285 days | 37% |
| Anette | 7/10 | 6287 days | 35% |
| midlands_missus | 8/10 | 6290 days | 37% |
| David | 7/10 | 6346 days | 35% |
| Suyin | 10/10 | 6366 days | 38% |
| Franz | 10/10 | 6539 days | 38% |
| Jennifer Baulch | 7/10 | 6544 days | 35% |
| George Jeffs | 10/10 | 6547 days | 38% |
| Jacob | 9/10 | 6551 days | 38% |
| Aharon | 10/10 | 6566 days | 38% |
| D.A. Mulder | 8/10 | 6567 days | 37% |
| Knol | 8/10 | 6569 days | 37% |
| Cole Penelope | 8/10 | 6572 days | 37% |
| Jody | 7/10 | 6580 days | 35% |
| Anna | 5/10 | 6580 days | 29% |
| Pauline Thai | 8/10 | 6587 days | 37% |
| Dan Adamson | 8/10 | 6587 days | 37% |
| Stephen Brightman | 8/10 | 6596 days | 37% |
| Madeleine Rowland | 8/10 | 6596 days | 37% |
| Bronwyn Gaby | 9/10 | 6614 days | 38% |
| Free_ride | 9/10 | 6630 days | 38% |
| Michael | 9/10 | 6653 days | 38% |
| Raul | 10/10 | 6903 days | 38% |
| TeamFlorida | 9/10 | 6905 days | 38% |
| TeamFlorida | 8/10 | 6905 days | 37% |
| James | 9/10 | 6918 days | 38% |
| Rudi | 10/10 | 6922 days | 38% |
| Rolf Kruger | 10/10 | 6946 days | 38% |
| Brian | 10/10 | 6950 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 53 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 | -4.08% |
| 198 | -4.10% |
| 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.