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 | 3109 days | 100% |
| Dan Coates | 9/10 | 3342 days | 78% |
| Dominik | 9/10 | 3342 days | 78% |
| Holloway | 10/10 | 3365 days | 77% |
| Christina | 6/10 | 3433 days | 58% |
| Barbara Knops | 9/10 | 3435 days | 69% |
| Manu Liberta | 10/10 | 3445 days | 69% |
| Bruno | 9/10 | 3455 days | 67% |
| Kirsty Smith | 10/10 | 3478 days | 66% |
| Sophia Satter | 8/10 | 3489 days | 63% |
| Afiya Levy | 10/10 | 3710 days | 44% |
| Johannes Eisel | 6/10 | 3719 days | 34% |
| Alexander Mattea | 5/10 | 3719 days | 28% |
| Timea Bagosi | 9/10 | 3722 days | 42% |
| Riviere | 8/10 | 3733 days | 40% |
| Dani | 8/10 | 3735 days | 40% |
| Benoit Leclerc | 7/10 | 3737 days | 37% |
| Anna Stoehr | 10/10 | 3755 days | 40% |
| Kai Krchmar | 6/10 | 3808 days | 27% |
| Kristina Farkas | 5/10 | 4103 days | 0% |
| Sophia Kadel | 10/10 | 4133 days | 3% |
| Laura and Marie | 7/10 | 4139 days | 1% |
| Rachel S | 10/10 | 4147 days | 2% |
| Joris Giullemot | 8/10 | 4455 days | 28% |
| Laura Metz | 7/10 | 4466 days | 25% |
| Hubertus Thost | 7/10 | 4466 days | 25% |
| Amanda | 4/10 | 4481 days | 12% |
| S B | 10/10 | 4494 days | 29% |
| M K | 10/10 | 4494 days | 29% |
| Maya Bakker-deDreu | 8/10 | 4502 days | 28% |
| Christin Woelk | 9/10 | 4782 days | 28% |
| Maria Klister | 7/10 | 4802 days | 25% |
| Lydia Kleinkoenen | 9/10 | 4822 days | 28% |
| Jessica Grewe | 9/10 | 4822 days | 28% |
| Hannah Lia-Isis Kubillus | 9/10 | 4822 days | 28% |
| Jan Zimmerman | 8/10 | 4833 days | 28% |
| Margaret and Derek McNeil | 10/10 | 4893 days | 29% |
| Frank and Suzanne | 8/10 | 4908 days | 28% |
| RollingMoon | 8/10 | 4969 days | 28% |
| Marcel & Kim Meichtry | 7/10 | 5189 days | 25% |
| Howell Davies | 5/10 | 5192 days | 17% |
| Baas | 7/10 | 5192 days | 25% |
| Pete & Pat Etheridge | 8/10 | 5192 days | 28% |
| Siegfried Richter | 7/10 | 5193 days | 25% |
| Melanie Mathiak | 10/10 | 5195 days | 29% |
| Sig Schrattner | 8/10 | 5195 days | 28% |
| Rebecca Doehl | 7/10 | 5196 days | 25% |
| Seth & Carla | 7/10 | 5197 days | 25% |
| Gabriele Wendt | 9/10 | 5197 days | 28% |
| Tadej Ferjan | 8/10 | 5197 days | 28% |
| Mary Mitchell | 10/10 | 5197 days | 29% |
| Emily Wikston | 9/10 | 5198 days | 28% |
| Andreas & Leonie Fehr | 10/10 | 5204 days | 29% |
| Horst Langstein | 9/10 | 5205 days | 28% |
| Marco Scheiber | 9/10 | 5206 days | 28% |
| Friedrich Kaltner | 10/10 | 5208 days | 29% |
| Frank & Julia | 10/10 | 5211 days | 29% |
| Thyg Lingdal | 10/10 | 5211 days | 29% |
| Nicole van Bergen | 8/10 | 5211 days | 28% |
| Mike & April Prince | 7/10 | 5225 days | 25% |
| Alfred & Henrike | 8/10 | 5237 days | 28% |
| Lyn Stainton | 6/10 | 5286 days | 22% |
| Ken Talan | 10/10 | 5514 days | 29% |
| Jon_and_Family | 9/10 | 5518 days | 28% |
| Gertz | 10/10 | 5522 days | 29% |
| Katarina Bokor | 8/10 | 5526 days | 28% |
| Mark Franklin | 6/10 | 5526 days | 22% |
| Gordon Agent | 10/10 | 5526 days | 29% |
| Maureen Hardy | 8/10 | 5526 days | 28% |
| AJ van Pelt | 8/10 | 5526 days | 28% |
| Werner and Rita | 9/10 | 5533 days | 28% |
| Richard Dudfield | 10/10 | 5535 days | 29% |
| Sayaka | 7/10 | 5535 days | 25% |
| Urs and Isabella | 7/10 | 5536 days | 25% |
| Juliane Kleiu | 10/10 | 5539 days | 29% |
| Linda Kremer | 9/10 | 5540 days | 28% |
| Rebecca Johnston | 9/10 | 5540 days | 28% |
| David Mellard | 10/10 | 5541 days | 29% |
| Bruce & Elaine Chote | 10/10 | 5541 days | 29% |
| Paul Nickson | 8/10 | 5541 days | 28% |
| Monique | 8/10 | 5541 days | 28% |
| Beat & Connie | 10/10 | 5543 days | 29% |
| Alex Stil | 9/10 | 5543 days | 28% |
| Pein van Nosrt | 7/10 | 5548 days | 25% |
| Raith | 9/10 | 5548 days | 28% |
| Elise van Haastert | 8/10 | 5548 days | 28% |
| Claudia | 10/10 | 5550 days | 29% |
| Carolin Ranner | 6/10 | 5550 days | 22% |
| Winskowsky | 9/10 | 5551 days | 28% |
| Hvid | 9/10 | 5565 days | 28% |
| Judith K. | 6/10 | 5567 days | 22% |
| Ruben and Jetske | 7/10 | 5567 days | 25% |
| Roy Seymour | 9/10 | 5568 days | 28% |
| Tom Hill | 10/10 | 5572 days | 29% |
| Ruua Reyrink | 7/10 | 5573 days | 25% |
| Patrick Hugener | 9/10 | 5573 days | 28% |
| JohnHaestad | 4/10 | 5577 days | 12% |
| dollimyxture | 10/10 | 5608 days | 29% |
| aggiemary04 | 10/10 | 5700 days | 29% |
| victoriauk | 4/10 | 5822 days | 12% |
| Baumgarten | 8/10 | 5850 days | 28% |
| travelbunnyadventures | 8/10 | 5853 days | 28% |
| Don & Geraldine | 10/10 | 5889 days | 29% |
| Matthias & Ceristiane | 8/10 | 5901 days | 28% |
| Hilary and Chris Ayton | 9/10 | 5902 days | 28% |
| Lis & Rob Tate | 9/10 | 5904 days | 28% |
| ccthornton100 | 10/10 | 5914 days | 29% |
| Bob Kusesia | 10/10 | 5915 days | 29% |
| Yssel de Schepper | 7/10 | 5920 days | 25% |
| Janny Meerdinnk Veldboow | 7/10 | 5920 days | 25% |
| Arie Ascher | 9/10 | 5921 days | 28% |
| Wolfgang Engelke | 10/10 | 5923 days | 29% |
| Thomas K | 9/10 | 5923 days | 28% |
| Loleit | 7/10 | 5935 days | 25% |
| Mattias Thorm | 9/10 | 5936 days | 28% |
| Vincente Garrido | 4/10 | 5937 days | 12% |
| R Gilge | 10/10 | 5938 days | 29% |
| Erik Hummelmose | 8/10 | 5938 days | 28% |
| Ian E | 6/10 | 5938 days | 22% |
| Nadine Schaee | 9/10 | 5939 days | 28% |
| Belinda Godhard | 2/10 | 5939 days | 2% |
| Uwe Rieper | 10/10 | 5941 days | 29% |
| E.M. Prideaux | 10/10 | 5956 days | 29% |
| Elizabeth E | 8/10 | 5958 days | 28% |
| Stevens Frans | 8/10 | 5959 days | 28% |
| Heinrich Hax | 9/10 | 5962 days | 28% |
| tanh | 7/10 | 5989 days | 25% |
| Stephanie Steiner | 8/10 | 6008 days | 28% |
| Julia May | 9/10 | 6015 days | 28% |
| X Neils | 7/10 | 6026 days | 25% |
| Sarah Smith | 5/10 | 6030 days | 17% |
| Anna | 6/10 | 6034 days | 22% |
| OliverG1 | 7/10 | 6236 days | 25% |
| Philipp | 5/10 | 6248 days | 17% |
| JasminA | 5/10 | 6248 days | 17% |
| ChristinaV | 8/10 | 6258 days | 28% |
| JuergenSchnitzer | 9/10 | 6264 days | 28% |
| AstridVG | 7/10 | 6265 days | 25% |
| NatasjaV | 7/10 | 6266 days | 25% |
| JimmyK | 7/10 | 6266 days | 25% |
| MarcoJ | 9/10 | 6268 days | 28% |
| LucyPoland | 9/10 | 6269 days | 28% |
| Stolz | 7/10 | 6272 days | 25% |
| BrzezinskaM | 10/10 | 6273 days | 29% |
| AndreB | 10/10 | 6273 days | 29% |
| Linda | 7/10 | 6280 days | 25% |
| Susan | 8/10 | 6281 days | 28% |
| Byleveld | 7/10 | 6281 days | 25% |
| JoseB | 8/10 | 6282 days | 28% |
| JetteG | 10/10 | 6282 days | 29% |
| CarolF | 7/10 | 6283 days | 25% |
| Rachel | 9/10 | 6298 days | 28% |
| Claire | 7/10 | 6298 days | 25% |
| Denise | 8/10 | 6299 days | 28% |
| Denk | 8/10 | 6310 days | 28% |
| Klalis | 10/10 | 6313 days | 29% |
| Thomas | 4/10 | 6317 days | 12% |
| Mike | 5/10 | 6318 days | 17% |
| Debbie Mossman | 9/10 | 6323 days | 28% |
| Johann | 10/10 | 6325 days | 29% |
| Carina | 10/10 | 6327 days | 29% |
| Mat | 8/10 | 6366 days | 28% |
| Anette | 7/10 | 6368 days | 25% |
| midlands_missus | 8/10 | 6370 days | 28% |
| David | 7/10 | 6426 days | 25% |
| Suyin | 10/10 | 6446 days | 29% |
| Franz | 10/10 | 6619 days | 29% |
| Jennifer Baulch | 7/10 | 6624 days | 25% |
| George Jeffs | 10/10 | 6627 days | 29% |
| Jacob | 9/10 | 6631 days | 28% |
| Aharon | 10/10 | 6646 days | 29% |
| D.A. Mulder | 8/10 | 6647 days | 28% |
| Knol | 8/10 | 6649 days | 28% |
| Cole Penelope | 8/10 | 6652 days | 28% |
| Jody | 7/10 | 6660 days | 25% |
| Anna | 5/10 | 6660 days | 17% |
| Pauline Thai | 8/10 | 6667 days | 28% |
| Dan Adamson | 8/10 | 6667 days | 28% |
| Stephen Brightman | 8/10 | 6676 days | 28% |
| Madeleine Rowland | 8/10 | 6676 days | 28% |
| Bronwyn Gaby | 9/10 | 6694 days | 28% |
| Free_ride | 9/10 | 6710 days | 28% |
| Michael | 9/10 | 6733 days | 28% |
| Raul | 10/10 | 6983 days | 29% |
| TeamFlorida | 9/10 | 6985 days | 28% |
| TeamFlorida | 8/10 | 6985 days | 28% |
| James | 9/10 | 6998 days | 28% |
| Rudi | 10/10 | 7002 days | 29% |
| Rolf Kruger | 10/10 | 7026 days | 29% |
| Brian | 10/10 | 7030 days | 29% |
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
-2.91% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 86 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 | -2.87% |
| 198 | -2.88% |
| 199 | -2.90% |
| 200 | -2.91% |
| 201 | -2.93% |
| 202 | -2.94% |
| 203 | -2.96% |
| … | … |
Balancing Adjustment
2.83% 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.