Hey, 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
83.54%
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 | 3094 days | 100% |
| Dan Coates | 9/10 | 3327 days | 78% |
| Dominik | 9/10 | 3327 days | 78% |
| Holloway | 10/10 | 3350 days | 77% |
| Christina | 6/10 | 3418 days | 58% |
| Barbara Knops | 9/10 | 3420 days | 69% |
| Manu Liberta | 10/10 | 3430 days | 69% |
| Bruno | 9/10 | 3440 days | 67% |
| Kirsty Smith | 10/10 | 3463 days | 66% |
| Sophia Satter | 8/10 | 3474 days | 63% |
| Afiya Levy | 10/10 | 3695 days | 44% |
| Johannes Eisel | 6/10 | 3704 days | 34% |
| Alexander Mattea | 5/10 | 3704 days | 28% |
| Timea Bagosi | 9/10 | 3706 days | 42% |
| Riviere | 8/10 | 3718 days | 41% |
| Dani | 8/10 | 3720 days | 40% |
| Benoit Leclerc | 7/10 | 3722 days | 37% |
| Anna Stoehr | 10/10 | 3740 days | 40% |
| Kai Krchmar | 6/10 | 3793 days | 27% |
| Kristina Farkas | 5/10 | 4088 days | 0% |
| Sophia Kadel | 10/10 | 4118 days | 4% |
| Laura and Marie | 7/10 | 4124 days | 1% |
| Rachel S | 10/10 | 4131 days | 3% |
| Joris Giullemot | 8/10 | 4440 days | 26% |
| Laura Metz | 7/10 | 4451 days | 24% |
| Hubertus Thost | 7/10 | 4451 days | 24% |
| Amanda | 4/10 | 4466 days | 11% |
| S B | 10/10 | 4479 days | 27% |
| M K | 10/10 | 4479 days | 27% |
| Maya Bakker-deDreu | 8/10 | 4487 days | 26% |
| Christin Woelk | 9/10 | 4767 days | 27% |
| Maria Klister | 7/10 | 4787 days | 24% |
| Lydia Kleinkoenen | 9/10 | 4807 days | 27% |
| Jessica Grewe | 9/10 | 4807 days | 27% |
| Hannah Lia-Isis Kubillus | 9/10 | 4807 days | 27% |
| Jan Zimmerman | 8/10 | 4818 days | 26% |
| Margaret and Derek McNeil | 10/10 | 4878 days | 27% |
| Frank and Suzanne | 8/10 | 4893 days | 26% |
| RollingMoon | 8/10 | 4954 days | 26% |
| Marcel & Kim Meichtry | 7/10 | 5174 days | 24% |
| Howell Davies | 5/10 | 5177 days | 16% |
| Baas | 7/10 | 5177 days | 24% |
| Pete & Pat Etheridge | 8/10 | 5177 days | 26% |
| Siegfried Richter | 7/10 | 5178 days | 24% |
| Melanie Mathiak | 10/10 | 5180 days | 27% |
| Sig Schrattner | 8/10 | 5180 days | 26% |
| Rebecca Doehl | 7/10 | 5181 days | 24% |
| Seth & Carla | 7/10 | 5182 days | 24% |
| Gabriele Wendt | 9/10 | 5182 days | 27% |
| Tadej Ferjan | 8/10 | 5182 days | 26% |
| Mary Mitchell | 10/10 | 5182 days | 27% |
| Emily Wikston | 9/10 | 5183 days | 27% |
| Andreas & Leonie Fehr | 10/10 | 5189 days | 27% |
| Horst Langstein | 9/10 | 5190 days | 27% |
| Marco Scheiber | 9/10 | 5191 days | 27% |
| Friedrich Kaltner | 10/10 | 5193 days | 27% |
| Frank & Julia | 10/10 | 5196 days | 27% |
| Thyg Lingdal | 10/10 | 5196 days | 27% |
| Nicole van Bergen | 8/10 | 5196 days | 26% |
| Mike & April Prince | 7/10 | 5210 days | 24% |
| Alfred & Henrike | 8/10 | 5222 days | 26% |
| Lyn Stainton | 6/10 | 5271 days | 21% |
| Ken Talan | 10/10 | 5498 days | 27% |
| Jon_and_Family | 9/10 | 5503 days | 27% |
| Gertz | 10/10 | 5507 days | 27% |
| Katarina Bokor | 8/10 | 5511 days | 26% |
| Mark Franklin | 6/10 | 5511 days | 21% |
| Gordon Agent | 10/10 | 5511 days | 27% |
| Maureen Hardy | 8/10 | 5511 days | 26% |
| AJ van Pelt | 8/10 | 5511 days | 26% |
| Werner and Rita | 9/10 | 5518 days | 27% |
| Richard Dudfield | 10/10 | 5520 days | 27% |
| Sayaka | 7/10 | 5520 days | 24% |
| Urs and Isabella | 7/10 | 5521 days | 24% |
| Juliane Kleiu | 10/10 | 5524 days | 27% |
| Linda Kremer | 9/10 | 5525 days | 27% |
| Rebecca Johnston | 9/10 | 5525 days | 27% |
| David Mellard | 10/10 | 5526 days | 27% |
| Bruce & Elaine Chote | 10/10 | 5526 days | 27% |
| Paul Nickson | 8/10 | 5526 days | 26% |
| Monique | 8/10 | 5526 days | 26% |
| Beat & Connie | 10/10 | 5528 days | 27% |
| Alex Stil | 9/10 | 5528 days | 27% |
| Pein van Nosrt | 7/10 | 5533 days | 24% |
| Raith | 9/10 | 5533 days | 27% |
| Elise van Haastert | 8/10 | 5533 days | 26% |
| Claudia | 10/10 | 5535 days | 27% |
| Carolin Ranner | 6/10 | 5535 days | 21% |
| Winskowsky | 9/10 | 5536 days | 27% |
| Hvid | 9/10 | 5550 days | 27% |
| Judith K. | 6/10 | 5552 days | 21% |
| Ruben and Jetske | 7/10 | 5552 days | 24% |
| Roy Seymour | 9/10 | 5553 days | 27% |
| Tom Hill | 10/10 | 5557 days | 27% |
| Ruua Reyrink | 7/10 | 5558 days | 24% |
| Patrick Hugener | 9/10 | 5558 days | 27% |
| JohnHaestad | 4/10 | 5562 days | 11% |
| dollimyxture | 10/10 | 5593 days | 27% |
| aggiemary04 | 10/10 | 5685 days | 27% |
| victoriauk | 4/10 | 5806 days | 11% |
| Baumgarten | 8/10 | 5834 days | 26% |
| travelbunnyadventures | 8/10 | 5837 days | 26% |
| Don & Geraldine | 10/10 | 5874 days | 27% |
| Matthias & Ceristiane | 8/10 | 5886 days | 26% |
| Hilary and Chris Ayton | 9/10 | 5887 days | 27% |
| Lis & Rob Tate | 9/10 | 5889 days | 27% |
| ccthornton100 | 10/10 | 5899 days | 27% |
| Bob Kusesia | 10/10 | 5900 days | 27% |
| Yssel de Schepper | 7/10 | 5905 days | 24% |
| Janny Meerdinnk Veldboow | 7/10 | 5905 days | 24% |
| Arie Ascher | 9/10 | 5906 days | 27% |
| Wolfgang Engelke | 10/10 | 5908 days | 27% |
| Thomas K | 9/10 | 5908 days | 27% |
| Loleit | 7/10 | 5920 days | 24% |
| Mattias Thorm | 9/10 | 5921 days | 27% |
| Vincente Garrido | 4/10 | 5922 days | 11% |
| R Gilge | 10/10 | 5923 days | 27% |
| Erik Hummelmose | 8/10 | 5923 days | 26% |
| Ian E | 6/10 | 5923 days | 21% |
| Nadine Schaee | 9/10 | 5924 days | 27% |
| Belinda Godhard | 2/10 | 5924 days | 1% |
| Uwe Rieper | 10/10 | 5926 days | 27% |
| E.M. Prideaux | 10/10 | 5941 days | 27% |
| Elizabeth E | 8/10 | 5943 days | 26% |
| Stevens Frans | 8/10 | 5944 days | 26% |
| Heinrich Hax | 9/10 | 5947 days | 27% |
| tanh | 7/10 | 5974 days | 24% |
| Stephanie Steiner | 8/10 | 5993 days | 26% |
| Julia May | 9/10 | 6000 days | 27% |
| X Neils | 7/10 | 6011 days | 24% |
| Sarah Smith | 5/10 | 6015 days | 16% |
| Anna | 6/10 | 6019 days | 21% |
| OliverG1 | 7/10 | 6220 days | 24% |
| Philipp | 5/10 | 6233 days | 16% |
| JasminA | 5/10 | 6233 days | 16% |
| ChristinaV | 8/10 | 6242 days | 26% |
| JuergenSchnitzer | 9/10 | 6249 days | 27% |
| AstridVG | 7/10 | 6249 days | 24% |
| NatasjaV | 7/10 | 6251 days | 24% |
| JimmyK | 7/10 | 6251 days | 24% |
| MarcoJ | 9/10 | 6253 days | 27% |
| LucyPoland | 9/10 | 6254 days | 27% |
| Stolz | 7/10 | 6256 days | 24% |
| BrzezinskaM | 10/10 | 6258 days | 27% |
| AndreB | 10/10 | 6258 days | 27% |
| Linda | 7/10 | 6264 days | 24% |
| Susan | 8/10 | 6265 days | 26% |
| Byleveld | 7/10 | 6266 days | 24% |
| JoseB | 8/10 | 6267 days | 26% |
| JetteG | 10/10 | 6267 days | 27% |
| CarolF | 7/10 | 6268 days | 24% |
| Rachel | 9/10 | 6282 days | 27% |
| Claire | 7/10 | 6282 days | 24% |
| Denise | 8/10 | 6283 days | 26% |
| Denk | 8/10 | 6295 days | 26% |
| Klalis | 10/10 | 6297 days | 27% |
| Thomas | 4/10 | 6301 days | 11% |
| Mike | 5/10 | 6302 days | 16% |
| Debbie Mossman | 9/10 | 6307 days | 27% |
| Johann | 10/10 | 6309 days | 27% |
| Carina | 10/10 | 6311 days | 27% |
| Mat | 8/10 | 6350 days | 26% |
| Anette | 7/10 | 6352 days | 24% |
| midlands_missus | 8/10 | 6354 days | 26% |
| David | 7/10 | 6410 days | 24% |
| Suyin | 10/10 | 6430 days | 27% |
| Franz | 10/10 | 6604 days | 27% |
| Jennifer Baulch | 7/10 | 6609 days | 24% |
| George Jeffs | 10/10 | 6612 days | 27% |
| Jacob | 9/10 | 6616 days | 27% |
| Aharon | 10/10 | 6631 days | 27% |
| D.A. Mulder | 8/10 | 6632 days | 26% |
| Knol | 8/10 | 6634 days | 26% |
| Cole Penelope | 8/10 | 6637 days | 26% |
| Jody | 7/10 | 6645 days | 24% |
| Anna | 5/10 | 6645 days | 16% |
| Pauline Thai | 8/10 | 6652 days | 26% |
| Dan Adamson | 8/10 | 6652 days | 26% |
| Stephen Brightman | 8/10 | 6661 days | 26% |
| Madeleine Rowland | 8/10 | 6661 days | 26% |
| Bronwyn Gaby | 9/10 | 6679 days | 27% |
| Free_ride | 9/10 | 6694 days | 27% |
| Michael | 9/10 | 6718 days | 27% |
| Raul | 10/10 | 6967 days | 27% |
| TeamFlorida | 9/10 | 6969 days | 27% |
| TeamFlorida | 8/10 | 6969 days | 26% |
| James | 9/10 | 6983 days | 27% |
| Rudi | 10/10 | 6987 days | 27% |
| Rolf Kruger | 10/10 | 7011 days | 27% |
| Brian | 10/10 | 7015 days | 27% |
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
-3.27% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 72 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 | -3.22% |
| 198 | -3.24% |
| 199 | -3.25% |
| 200 | -3.27% |
| 201 | -3.29% |
| 202 | -3.30% |
| 203 | -3.32% |
| … | … |
Balancing Adjustment
2.93% 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.