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
83.53%
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 | 3171 days | 100% |
| Dan Coates | 9/10 | 3404 days | 78% |
| Dominik | 9/10 | 3404 days | 78% |
| Holloway | 10/10 | 3427 days | 76% |
| Christina | 6/10 | 3495 days | 58% |
| Barbara Knops | 9/10 | 3497 days | 69% |
| Manu Liberta | 10/10 | 3507 days | 69% |
| Bruno | 9/10 | 3517 days | 67% |
| Kirsty Smith | 10/10 | 3540 days | 65% |
| Sophia Satter | 8/10 | 3551 days | 63% |
| Afiya Levy | 10/10 | 3772 days | 43% |
| Johannes Eisel | 6/10 | 3781 days | 34% |
| Alexander Mattea | 5/10 | 3781 days | 28% |
| Timea Bagosi | 9/10 | 3783 days | 41% |
| Riviere | 8/10 | 3795 days | 40% |
| Dani | 8/10 | 3797 days | 39% |
| Benoit Leclerc | 7/10 | 3799 days | 36% |
| Anna Stoehr | 10/10 | 3817 days | 39% |
| Kai Krchmar | 6/10 | 3870 days | 27% |
| Kristina Farkas | 5/10 | 4165 days | 0% |
| Sophia Kadel | 10/10 | 4195 days | 2% |
| Laura and Marie | 7/10 | 4201 days | 0% |
| Rachel S | 10/10 | 4208 days | 1% |
| Joris Giullemot | 8/10 | 4517 days | 33% |
| Laura Metz | 7/10 | 4528 days | 30% |
| Hubertus Thost | 7/10 | 4528 days | 30% |
| Amanda | 4/10 | 4543 days | 16% |
| S B | 10/10 | 4556 days | 34% |
| M K | 10/10 | 4556 days | 34% |
| Maya Bakker-deDreu | 8/10 | 4564 days | 33% |
| Christin Woelk | 9/10 | 4844 days | 33% |
| Maria Klister | 7/10 | 4864 days | 30% |
| Lydia Kleinkoenen | 9/10 | 4884 days | 33% |
| Jessica Grewe | 9/10 | 4884 days | 33% |
| Hannah Lia-Isis Kubillus | 9/10 | 4884 days | 33% |
| Jan Zimmerman | 8/10 | 4895 days | 33% |
| Margaret and Derek McNeil | 10/10 | 4955 days | 34% |
| Frank and Suzanne | 8/10 | 4970 days | 33% |
| RollingMoon | 8/10 | 5031 days | 33% |
| Marcel & Kim Meichtry | 7/10 | 5251 days | 30% |
| Howell Davies | 5/10 | 5254 days | 22% |
| Baas | 7/10 | 5254 days | 30% |
| Pete & Pat Etheridge | 8/10 | 5254 days | 33% |
| Siegfried Richter | 7/10 | 5255 days | 30% |
| Melanie Mathiak | 10/10 | 5257 days | 34% |
| Sig Schrattner | 8/10 | 5257 days | 33% |
| Rebecca Doehl | 7/10 | 5258 days | 30% |
| Seth & Carla | 7/10 | 5259 days | 30% |
| Gabriele Wendt | 9/10 | 5259 days | 33% |
| Tadej Ferjan | 8/10 | 5259 days | 33% |
| Mary Mitchell | 10/10 | 5259 days | 34% |
| Emily Wikston | 9/10 | 5260 days | 33% |
| Andreas & Leonie Fehr | 10/10 | 5266 days | 34% |
| Horst Langstein | 9/10 | 5267 days | 33% |
| Marco Scheiber | 9/10 | 5268 days | 33% |
| Friedrich Kaltner | 10/10 | 5270 days | 34% |
| Frank & Julia | 10/10 | 5273 days | 34% |
| Thyg Lingdal | 10/10 | 5273 days | 34% |
| Nicole van Bergen | 8/10 | 5273 days | 33% |
| Mike & April Prince | 7/10 | 5287 days | 30% |
| Alfred & Henrike | 8/10 | 5299 days | 33% |
| Lyn Stainton | 6/10 | 5348 days | 27% |
| Ken Talan | 10/10 | 5576 days | 34% |
| Jon_and_Family | 9/10 | 5580 days | 33% |
| Gertz | 10/10 | 5584 days | 34% |
| Katarina Bokor | 8/10 | 5588 days | 33% |
| Mark Franklin | 6/10 | 5588 days | 27% |
| Gordon Agent | 10/10 | 5588 days | 34% |
| Maureen Hardy | 8/10 | 5588 days | 33% |
| AJ van Pelt | 8/10 | 5588 days | 33% |
| Werner and Rita | 9/10 | 5595 days | 33% |
| Richard Dudfield | 10/10 | 5597 days | 34% |
| Sayaka | 7/10 | 5597 days | 30% |
| Urs and Isabella | 7/10 | 5598 days | 30% |
| Juliane Kleiu | 10/10 | 5601 days | 34% |
| Linda Kremer | 9/10 | 5602 days | 33% |
| Rebecca Johnston | 9/10 | 5602 days | 33% |
| David Mellard | 10/10 | 5603 days | 34% |
| Bruce & Elaine Chote | 10/10 | 5603 days | 34% |
| Paul Nickson | 8/10 | 5603 days | 33% |
| Monique | 8/10 | 5603 days | 33% |
| Beat & Connie | 10/10 | 5605 days | 34% |
| Alex Stil | 9/10 | 5605 days | 33% |
| Pein van Nosrt | 7/10 | 5610 days | 30% |
| Raith | 9/10 | 5610 days | 33% |
| Elise van Haastert | 8/10 | 5610 days | 33% |
| Claudia | 10/10 | 5612 days | 34% |
| Carolin Ranner | 6/10 | 5612 days | 27% |
| Winskowsky | 9/10 | 5613 days | 33% |
| Hvid | 9/10 | 5627 days | 33% |
| Judith K. | 6/10 | 5629 days | 27% |
| Ruben and Jetske | 7/10 | 5629 days | 30% |
| Roy Seymour | 9/10 | 5630 days | 33% |
| Tom Hill | 10/10 | 5634 days | 34% |
| Ruua Reyrink | 7/10 | 5635 days | 30% |
| Patrick Hugener | 9/10 | 5635 days | 33% |
| JohnHaestad | 4/10 | 5639 days | 16% |
| dollimyxture | 10/10 | 5670 days | 34% |
| aggiemary04 | 10/10 | 5762 days | 34% |
| victoriauk | 4/10 | 5884 days | 16% |
| Baumgarten | 8/10 | 5912 days | 33% |
| travelbunnyadventures | 8/10 | 5915 days | 33% |
| Don & Geraldine | 10/10 | 5951 days | 34% |
| Matthias & Ceristiane | 8/10 | 5963 days | 33% |
| Hilary and Chris Ayton | 9/10 | 5964 days | 33% |
| Lis & Rob Tate | 9/10 | 5966 days | 33% |
| ccthornton100 | 10/10 | 5976 days | 34% |
| Bob Kusesia | 10/10 | 5977 days | 34% |
| Yssel de Schepper | 7/10 | 5982 days | 30% |
| Janny Meerdinnk Veldboow | 7/10 | 5982 days | 30% |
| Arie Ascher | 9/10 | 5983 days | 33% |
| Wolfgang Engelke | 10/10 | 5985 days | 34% |
| Thomas K | 9/10 | 5985 days | 33% |
| Loleit | 7/10 | 5997 days | 30% |
| Mattias Thorm | 9/10 | 5998 days | 33% |
| Vincente Garrido | 4/10 | 5999 days | 16% |
| R Gilge | 10/10 | 6000 days | 34% |
| Erik Hummelmose | 8/10 | 6000 days | 33% |
| Ian E | 6/10 | 6000 days | 27% |
| Nadine Schaee | 9/10 | 6001 days | 33% |
| Belinda Godhard | 2/10 | 6001 days | 7% |
| Uwe Rieper | 10/10 | 6003 days | 34% |
| E.M. Prideaux | 10/10 | 6018 days | 34% |
| Elizabeth E | 8/10 | 6020 days | 33% |
| Stevens Frans | 8/10 | 6021 days | 33% |
| Heinrich Hax | 9/10 | 6024 days | 33% |
| tanh | 7/10 | 6051 days | 30% |
| Stephanie Steiner | 8/10 | 6070 days | 33% |
| Julia May | 9/10 | 6077 days | 33% |
| X Neils | 7/10 | 6088 days | 30% |
| Sarah Smith | 5/10 | 6092 days | 22% |
| Anna | 6/10 | 6096 days | 27% |
| OliverG1 | 7/10 | 6298 days | 30% |
| Philipp | 5/10 | 6310 days | 22% |
| JasminA | 5/10 | 6310 days | 22% |
| ChristinaV | 8/10 | 6319 days | 33% |
| JuergenSchnitzer | 9/10 | 6326 days | 33% |
| AstridVG | 7/10 | 6326 days | 30% |
| NatasjaV | 7/10 | 6328 days | 30% |
| JimmyK | 7/10 | 6328 days | 30% |
| MarcoJ | 9/10 | 6330 days | 33% |
| LucyPoland | 9/10 | 6331 days | 33% |
| Stolz | 7/10 | 6333 days | 30% |
| BrzezinskaM | 10/10 | 6335 days | 34% |
| AndreB | 10/10 | 6335 days | 34% |
| Linda | 7/10 | 6341 days | 30% |
| Susan | 8/10 | 6342 days | 33% |
| Byleveld | 7/10 | 6343 days | 30% |
| JoseB | 8/10 | 6344 days | 33% |
| JetteG | 10/10 | 6344 days | 34% |
| CarolF | 7/10 | 6345 days | 30% |
| Rachel | 9/10 | 6359 days | 33% |
| Claire | 7/10 | 6359 days | 30% |
| Denise | 8/10 | 6360 days | 33% |
| Denk | 8/10 | 6372 days | 33% |
| Klalis | 10/10 | 6374 days | 34% |
| Thomas | 4/10 | 6378 days | 16% |
| Mike | 5/10 | 6379 days | 22% |
| Debbie Mossman | 9/10 | 6384 days | 33% |
| Johann | 10/10 | 6386 days | 34% |
| Carina | 10/10 | 6388 days | 34% |
| Mat | 8/10 | 6427 days | 33% |
| Anette | 7/10 | 6429 days | 30% |
| midlands_missus | 8/10 | 6431 days | 33% |
| David | 7/10 | 6487 days | 30% |
| Suyin | 10/10 | 6507 days | 34% |
| Franz | 10/10 | 6681 days | 34% |
| Jennifer Baulch | 7/10 | 6686 days | 30% |
| George Jeffs | 10/10 | 6689 days | 34% |
| Jacob | 9/10 | 6693 days | 33% |
| Aharon | 10/10 | 6708 days | 34% |
| D.A. Mulder | 8/10 | 6709 days | 33% |
| Knol | 8/10 | 6711 days | 33% |
| Cole Penelope | 8/10 | 6714 days | 33% |
| Jody | 7/10 | 6722 days | 30% |
| Anna | 5/10 | 6722 days | 22% |
| Pauline Thai | 8/10 | 6729 days | 33% |
| Dan Adamson | 8/10 | 6729 days | 33% |
| Stephen Brightman | 8/10 | 6738 days | 33% |
| Madeleine Rowland | 8/10 | 6738 days | 33% |
| Bronwyn Gaby | 9/10 | 6756 days | 33% |
| Free_ride | 9/10 | 6771 days | 33% |
| Michael | 9/10 | 6795 days | 33% |
| Raul | 10/10 | 7045 days | 34% |
| TeamFlorida | 9/10 | 7047 days | 33% |
| TeamFlorida | 8/10 | 7047 days | 33% |
| James | 9/10 | 7060 days | 33% |
| Rudi | 10/10 | 7064 days | 34% |
| Rolf Kruger | 10/10 | 7088 days | 34% |
| Brian | 10/10 | 7092 days | 34% |
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
-2.00% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 125 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 | -1.97% |
| 198 | -1.98% |
| 199 | -1.99% |
| 200 | -2.00% |
| 201 | -2.01% |
| 202 | -2.02% |
| 203 | -2.03% |
| … | … |
Balancing Adjustment
2.60% 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
84%
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.