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
83.54%
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 | 3069 days | 100% |
| Dan Coates | 9/10 | 3302 days | 78% |
| Dominik | 9/10 | 3302 days | 78% |
| Holloway | 10/10 | 3325 days | 77% |
| Christina | 6/10 | 3393 days | 58% |
| Barbara Knops | 9/10 | 3395 days | 70% |
| Manu Liberta | 10/10 | 3405 days | 70% |
| Bruno | 9/10 | 3415 days | 68% |
| Kirsty Smith | 10/10 | 3438 days | 67% |
| Sophia Satter | 8/10 | 3449 days | 64% |
| Afiya Levy | 10/10 | 3670 days | 45% |
| Johannes Eisel | 6/10 | 3679 days | 35% |
| Alexander Mattea | 5/10 | 3679 days | 28% |
| Timea Bagosi | 9/10 | 3681 days | 43% |
| Riviere | 8/10 | 3693 days | 41% |
| Dani | 8/10 | 3695 days | 41% |
| Benoit Leclerc | 7/10 | 3697 days | 38% |
| Anna Stoehr | 10/10 | 3715 days | 41% |
| Kai Krchmar | 6/10 | 3768 days | 28% |
| Kristina Farkas | 5/10 | 4063 days | 1% |
| Sophia Kadel | 10/10 | 4093 days | 5% |
| Laura and Marie | 7/10 | 4099 days | 3% |
| Rachel S | 10/10 | 4106 days | 4% |
| Joris Giullemot | 8/10 | 4415 days | 25% |
| Laura Metz | 7/10 | 4426 days | 23% |
| Hubertus Thost | 7/10 | 4426 days | 23% |
| Amanda | 4/10 | 4441 days | 9% |
| S B | 10/10 | 4454 days | 26% |
| M K | 10/10 | 4454 days | 26% |
| Maya Bakker-deDreu | 8/10 | 4462 days | 25% |
| Christin Woelk | 9/10 | 4742 days | 26% |
| Maria Klister | 7/10 | 4762 days | 23% |
| Lydia Kleinkoenen | 9/10 | 4782 days | 26% |
| Jessica Grewe | 9/10 | 4782 days | 26% |
| Hannah Lia-Isis Kubillus | 9/10 | 4782 days | 26% |
| Jan Zimmerman | 8/10 | 4793 days | 25% |
| Margaret and Derek McNeil | 10/10 | 4853 days | 26% |
| Frank and Suzanne | 8/10 | 4868 days | 25% |
| RollingMoon | 8/10 | 4929 days | 25% |
| Marcel & Kim Meichtry | 7/10 | 5149 days | 23% |
| Howell Davies | 5/10 | 5152 days | 15% |
| Baas | 7/10 | 5152 days | 23% |
| Pete & Pat Etheridge | 8/10 | 5152 days | 25% |
| Siegfried Richter | 7/10 | 5153 days | 23% |
| Melanie Mathiak | 10/10 | 5155 days | 26% |
| Sig Schrattner | 8/10 | 5155 days | 25% |
| Rebecca Doehl | 7/10 | 5156 days | 23% |
| Seth & Carla | 7/10 | 5157 days | 23% |
| Gabriele Wendt | 9/10 | 5157 days | 26% |
| Tadej Ferjan | 8/10 | 5157 days | 25% |
| Mary Mitchell | 10/10 | 5157 days | 26% |
| Emily Wikston | 9/10 | 5158 days | 26% |
| Andreas & Leonie Fehr | 10/10 | 5164 days | 26% |
| Horst Langstein | 9/10 | 5165 days | 26% |
| Marco Scheiber | 9/10 | 5166 days | 26% |
| Friedrich Kaltner | 10/10 | 5168 days | 26% |
| Frank & Julia | 10/10 | 5171 days | 26% |
| Thyg Lingdal | 10/10 | 5171 days | 26% |
| Nicole van Bergen | 8/10 | 5171 days | 25% |
| Mike & April Prince | 7/10 | 5185 days | 23% |
| Alfred & Henrike | 8/10 | 5197 days | 25% |
| Lyn Stainton | 6/10 | 5246 days | 19% |
| Ken Talan | 10/10 | 5473 days | 26% |
| Jon_and_Family | 9/10 | 5478 days | 26% |
| Gertz | 10/10 | 5482 days | 26% |
| Katarina Bokor | 8/10 | 5486 days | 25% |
| Mark Franklin | 6/10 | 5486 days | 19% |
| Gordon Agent | 10/10 | 5486 days | 26% |
| Maureen Hardy | 8/10 | 5486 days | 25% |
| AJ van Pelt | 8/10 | 5486 days | 25% |
| Werner and Rita | 9/10 | 5493 days | 26% |
| Richard Dudfield | 10/10 | 5495 days | 26% |
| Sayaka | 7/10 | 5495 days | 23% |
| Urs and Isabella | 7/10 | 5496 days | 23% |
| Juliane Kleiu | 10/10 | 5499 days | 26% |
| Linda Kremer | 9/10 | 5500 days | 26% |
| Rebecca Johnston | 9/10 | 5500 days | 26% |
| David Mellard | 10/10 | 5501 days | 26% |
| Bruce & Elaine Chote | 10/10 | 5501 days | 26% |
| Paul Nickson | 8/10 | 5501 days | 25% |
| Monique | 8/10 | 5501 days | 25% |
| Beat & Connie | 10/10 | 5503 days | 26% |
| Alex Stil | 9/10 | 5503 days | 26% |
| Pein van Nosrt | 7/10 | 5508 days | 23% |
| Raith | 9/10 | 5508 days | 26% |
| Elise van Haastert | 8/10 | 5508 days | 25% |
| Claudia | 10/10 | 5510 days | 26% |
| Carolin Ranner | 6/10 | 5510 days | 19% |
| Winskowsky | 9/10 | 5511 days | 26% |
| Hvid | 9/10 | 5525 days | 26% |
| Judith K. | 6/10 | 5527 days | 19% |
| Ruben and Jetske | 7/10 | 5527 days | 23% |
| Roy Seymour | 9/10 | 5528 days | 26% |
| Tom Hill | 10/10 | 5532 days | 26% |
| Ruua Reyrink | 7/10 | 5533 days | 23% |
| Patrick Hugener | 9/10 | 5533 days | 26% |
| JohnHaestad | 4/10 | 5537 days | 9% |
| dollimyxture | 10/10 | 5568 days | 26% |
| aggiemary04 | 10/10 | 5660 days | 26% |
| victoriauk | 4/10 | 5781 days | 9% |
| Baumgarten | 8/10 | 5809 days | 25% |
| travelbunnyadventures | 8/10 | 5812 days | 25% |
| Don & Geraldine | 10/10 | 5849 days | 26% |
| Matthias & Ceristiane | 8/10 | 5861 days | 25% |
| Hilary and Chris Ayton | 9/10 | 5862 days | 26% |
| Lis & Rob Tate | 9/10 | 5864 days | 26% |
| ccthornton100 | 10/10 | 5874 days | 26% |
| Bob Kusesia | 10/10 | 5875 days | 26% |
| Yssel de Schepper | 7/10 | 5880 days | 23% |
| Janny Meerdinnk Veldboow | 7/10 | 5880 days | 23% |
| Arie Ascher | 9/10 | 5881 days | 26% |
| Wolfgang Engelke | 10/10 | 5883 days | 26% |
| Thomas K | 9/10 | 5883 days | 26% |
| Loleit | 7/10 | 5895 days | 23% |
| Mattias Thorm | 9/10 | 5896 days | 26% |
| Vincente Garrido | 4/10 | 5897 days | 9% |
| R Gilge | 10/10 | 5898 days | 26% |
| Erik Hummelmose | 8/10 | 5898 days | 25% |
| Ian E | 6/10 | 5898 days | 19% |
| Nadine Schaee | 9/10 | 5899 days | 26% |
| Belinda Godhard | 2/10 | 5899 days | 0% |
| Uwe Rieper | 10/10 | 5901 days | 26% |
| E.M. Prideaux | 10/10 | 5916 days | 26% |
| Elizabeth E | 8/10 | 5918 days | 25% |
| Stevens Frans | 8/10 | 5919 days | 25% |
| Heinrich Hax | 9/10 | 5922 days | 26% |
| tanh | 7/10 | 5949 days | 23% |
| Stephanie Steiner | 8/10 | 5968 days | 25% |
| Julia May | 9/10 | 5975 days | 26% |
| X Neils | 7/10 | 5986 days | 23% |
| Sarah Smith | 5/10 | 5990 days | 15% |
| Anna | 6/10 | 5994 days | 19% |
| OliverG1 | 7/10 | 6195 days | 23% |
| Philipp | 5/10 | 6208 days | 15% |
| JasminA | 5/10 | 6208 days | 15% |
| ChristinaV | 8/10 | 6217 days | 25% |
| JuergenSchnitzer | 9/10 | 6224 days | 26% |
| AstridVG | 7/10 | 6224 days | 23% |
| NatasjaV | 7/10 | 6226 days | 23% |
| JimmyK | 7/10 | 6226 days | 23% |
| MarcoJ | 9/10 | 6228 days | 26% |
| LucyPoland | 9/10 | 6229 days | 26% |
| Stolz | 7/10 | 6231 days | 23% |
| BrzezinskaM | 10/10 | 6233 days | 26% |
| AndreB | 10/10 | 6233 days | 26% |
| Linda | 7/10 | 6239 days | 23% |
| Susan | 8/10 | 6240 days | 25% |
| Byleveld | 7/10 | 6241 days | 23% |
| JoseB | 8/10 | 6242 days | 25% |
| JetteG | 10/10 | 6242 days | 26% |
| CarolF | 7/10 | 6243 days | 23% |
| Rachel | 9/10 | 6257 days | 26% |
| Claire | 7/10 | 6257 days | 23% |
| Denise | 8/10 | 6258 days | 25% |
| Denk | 8/10 | 6270 days | 25% |
| Klalis | 10/10 | 6272 days | 26% |
| Thomas | 4/10 | 6276 days | 9% |
| Mike | 5/10 | 6277 days | 15% |
| Debbie Mossman | 9/10 | 6282 days | 26% |
| Johann | 10/10 | 6284 days | 26% |
| Carina | 10/10 | 6286 days | 26% |
| Mat | 8/10 | 6325 days | 25% |
| Anette | 7/10 | 6327 days | 23% |
| midlands_missus | 8/10 | 6329 days | 25% |
| David | 7/10 | 6385 days | 23% |
| Suyin | 10/10 | 6405 days | 26% |
| Franz | 10/10 | 6579 days | 26% |
| Jennifer Baulch | 7/10 | 6584 days | 23% |
| George Jeffs | 10/10 | 6587 days | 26% |
| Jacob | 9/10 | 6591 days | 26% |
| Aharon | 10/10 | 6606 days | 26% |
| D.A. Mulder | 8/10 | 6607 days | 25% |
| Knol | 8/10 | 6609 days | 25% |
| Cole Penelope | 8/10 | 6612 days | 25% |
| Jody | 7/10 | 6620 days | 23% |
| Anna | 5/10 | 6620 days | 15% |
| Pauline Thai | 8/10 | 6627 days | 25% |
| Dan Adamson | 8/10 | 6627 days | 25% |
| Stephen Brightman | 8/10 | 6636 days | 25% |
| Madeleine Rowland | 8/10 | 6636 days | 25% |
| Bronwyn Gaby | 9/10 | 6654 days | 26% |
| Free_ride | 9/10 | 6669 days | 26% |
| Michael | 9/10 | 6693 days | 26% |
| Raul | 10/10 | 6942 days | 26% |
| TeamFlorida | 9/10 | 6944 days | 26% |
| TeamFlorida | 8/10 | 6944 days | 25% |
| James | 9/10 | 6958 days | 26% |
| Rudi | 10/10 | 6962 days | 26% |
| Rolf Kruger | 10/10 | 6986 days | 26% |
| Brian | 10/10 | 6990 days | 26% |
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
-3.75% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 60 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 | -3.70% |
| 198 | -3.72% |
| 199 | -3.74% |
| 200 | -3.75% |
| 201 | -3.77% |
| 202 | -3.79% |
| 203 | -3.81% |
| … | … |
Balancing Adjustment
3.07% 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.