Hi, 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 | 3211 days | 100% |
| Dan Coates | 9/10 | 3444 days | 78% |
| Dominik | 9/10 | 3444 days | 78% |
| Holloway | 10/10 | 3467 days | 76% |
| Christina | 6/10 | 3535 days | 58% |
| Barbara Knops | 9/10 | 3537 days | 69% |
| Manu Liberta | 10/10 | 3547 days | 68% |
| Bruno | 9/10 | 3557 days | 67% |
| Kirsty Smith | 10/10 | 3580 days | 65% |
| Sophia Satter | 8/10 | 3591 days | 63% |
| Afiya Levy | 10/10 | 3812 days | 43% |
| Johannes Eisel | 6/10 | 3821 days | 34% |
| Alexander Mattea | 5/10 | 3821 days | 29% |
| Timea Bagosi | 9/10 | 3823 days | 41% |
| Riviere | 8/10 | 3835 days | 39% |
| Dani | 8/10 | 3837 days | 39% |
| Benoit Leclerc | 7/10 | 3839 days | 36% |
| Anna Stoehr | 10/10 | 3857 days | 38% |
| Kai Krchmar | 6/10 | 3910 days | 27% |
| Kristina Farkas | 5/10 | 4205 days | 0% |
| Sophia Kadel | 10/10 | 4235 days | 2% |
| Laura and Marie | 7/10 | 4241 days | 0% |
| Rachel S | 10/10 | 4248 days | 0% |
| Joris Giullemot | 8/10 | 4557 days | 36% |
| Laura Metz | 7/10 | 4568 days | 34% |
| Hubertus Thost | 7/10 | 4568 days | 34% |
| Amanda | 4/10 | 4583 days | 20% |
| S B | 10/10 | 4596 days | 37% |
| M K | 10/10 | 4596 days | 37% |
| Maya Bakker-deDreu | 8/10 | 4604 days | 36% |
| Christin Woelk | 9/10 | 4884 days | 37% |
| Maria Klister | 7/10 | 4904 days | 34% |
| Lydia Kleinkoenen | 9/10 | 4924 days | 37% |
| Jessica Grewe | 9/10 | 4924 days | 37% |
| Hannah Lia-Isis Kubillus | 9/10 | 4924 days | 37% |
| Jan Zimmerman | 8/10 | 4935 days | 36% |
| Margaret and Derek McNeil | 10/10 | 4995 days | 37% |
| Frank and Suzanne | 8/10 | 5010 days | 36% |
| RollingMoon | 8/10 | 5071 days | 36% |
| Marcel & Kim Meichtry | 7/10 | 5291 days | 34% |
| Howell Davies | 5/10 | 5294 days | 25% |
| Baas | 7/10 | 5294 days | 34% |
| Pete & Pat Etheridge | 8/10 | 5294 days | 36% |
| Siegfried Richter | 7/10 | 5295 days | 34% |
| Melanie Mathiak | 10/10 | 5297 days | 37% |
| Sig Schrattner | 8/10 | 5297 days | 36% |
| Rebecca Doehl | 7/10 | 5298 days | 34% |
| Seth & Carla | 7/10 | 5299 days | 34% |
| Gabriele Wendt | 9/10 | 5299 days | 37% |
| Tadej Ferjan | 8/10 | 5299 days | 36% |
| Mary Mitchell | 10/10 | 5299 days | 37% |
| Emily Wikston | 9/10 | 5300 days | 37% |
| Andreas & Leonie Fehr | 10/10 | 5306 days | 37% |
| Horst Langstein | 9/10 | 5307 days | 37% |
| Marco Scheiber | 9/10 | 5308 days | 37% |
| Friedrich Kaltner | 10/10 | 5310 days | 37% |
| Frank & Julia | 10/10 | 5313 days | 37% |
| Thyg Lingdal | 10/10 | 5313 days | 37% |
| Nicole van Bergen | 8/10 | 5313 days | 36% |
| Mike & April Prince | 7/10 | 5327 days | 34% |
| Alfred & Henrike | 8/10 | 5339 days | 36% |
| Lyn Stainton | 6/10 | 5388 days | 30% |
| Ken Talan | 10/10 | 5616 days | 37% |
| Jon_and_Family | 9/10 | 5620 days | 37% |
| Gertz | 10/10 | 5624 days | 37% |
| Katarina Bokor | 8/10 | 5628 days | 36% |
| Mark Franklin | 6/10 | 5628 days | 30% |
| Gordon Agent | 10/10 | 5628 days | 37% |
| Maureen Hardy | 8/10 | 5628 days | 36% |
| AJ van Pelt | 8/10 | 5628 days | 36% |
| Werner and Rita | 9/10 | 5635 days | 37% |
| Richard Dudfield | 10/10 | 5637 days | 37% |
| Sayaka | 7/10 | 5637 days | 34% |
| Urs and Isabella | 7/10 | 5638 days | 34% |
| Juliane Kleiu | 10/10 | 5641 days | 37% |
| Linda Kremer | 9/10 | 5642 days | 37% |
| Rebecca Johnston | 9/10 | 5642 days | 37% |
| David Mellard | 10/10 | 5643 days | 37% |
| Bruce & Elaine Chote | 10/10 | 5643 days | 37% |
| Paul Nickson | 8/10 | 5643 days | 36% |
| Monique | 8/10 | 5643 days | 36% |
| Beat & Connie | 10/10 | 5645 days | 37% |
| Alex Stil | 9/10 | 5645 days | 37% |
| Pein van Nosrt | 7/10 | 5650 days | 34% |
| Raith | 9/10 | 5650 days | 37% |
| Elise van Haastert | 8/10 | 5650 days | 36% |
| Claudia | 10/10 | 5652 days | 37% |
| Carolin Ranner | 6/10 | 5652 days | 30% |
| Winskowsky | 9/10 | 5653 days | 37% |
| Hvid | 9/10 | 5667 days | 37% |
| Judith K. | 6/10 | 5669 days | 30% |
| Ruben and Jetske | 7/10 | 5669 days | 34% |
| Roy Seymour | 9/10 | 5670 days | 37% |
| Tom Hill | 10/10 | 5674 days | 37% |
| Ruua Reyrink | 7/10 | 5675 days | 34% |
| Patrick Hugener | 9/10 | 5675 days | 37% |
| JohnHaestad | 4/10 | 5679 days | 20% |
| dollimyxture | 10/10 | 5710 days | 37% |
| aggiemary04 | 10/10 | 5802 days | 37% |
| victoriauk | 4/10 | 5924 days | 20% |
| Baumgarten | 8/10 | 5952 days | 36% |
| travelbunnyadventures | 8/10 | 5955 days | 36% |
| Don & Geraldine | 10/10 | 5991 days | 37% |
| Matthias & Ceristiane | 8/10 | 6003 days | 36% |
| Hilary and Chris Ayton | 9/10 | 6004 days | 37% |
| Lis & Rob Tate | 9/10 | 6006 days | 37% |
| ccthornton100 | 10/10 | 6016 days | 37% |
| Bob Kusesia | 10/10 | 6017 days | 37% |
| Yssel de Schepper | 7/10 | 6022 days | 34% |
| Janny Meerdinnk Veldboow | 7/10 | 6022 days | 34% |
| Arie Ascher | 9/10 | 6023 days | 37% |
| Wolfgang Engelke | 10/10 | 6025 days | 37% |
| Thomas K | 9/10 | 6025 days | 37% |
| Loleit | 7/10 | 6037 days | 34% |
| Mattias Thorm | 9/10 | 6038 days | 37% |
| Vincente Garrido | 4/10 | 6039 days | 20% |
| R Gilge | 10/10 | 6040 days | 37% |
| Erik Hummelmose | 8/10 | 6040 days | 36% |
| Ian E | 6/10 | 6040 days | 30% |
| Nadine Schaee | 9/10 | 6041 days | 37% |
| Belinda Godhard | 2/10 | 6041 days | 10% |
| Uwe Rieper | 10/10 | 6043 days | 37% |
| E.M. Prideaux | 10/10 | 6058 days | 37% |
| Elizabeth E | 8/10 | 6060 days | 36% |
| Stevens Frans | 8/10 | 6061 days | 36% |
| Heinrich Hax | 9/10 | 6064 days | 37% |
| tanh | 7/10 | 6091 days | 34% |
| Stephanie Steiner | 8/10 | 6110 days | 36% |
| Julia May | 9/10 | 6117 days | 37% |
| X Neils | 7/10 | 6128 days | 34% |
| Sarah Smith | 5/10 | 6132 days | 25% |
| Anna | 6/10 | 6136 days | 30% |
| OliverG1 | 7/10 | 6338 days | 34% |
| Philipp | 5/10 | 6350 days | 25% |
| JasminA | 5/10 | 6350 days | 25% |
| ChristinaV | 8/10 | 6359 days | 36% |
| JuergenSchnitzer | 9/10 | 6366 days | 37% |
| AstridVG | 7/10 | 6366 days | 34% |
| NatasjaV | 7/10 | 6368 days | 34% |
| JimmyK | 7/10 | 6368 days | 34% |
| MarcoJ | 9/10 | 6370 days | 37% |
| LucyPoland | 9/10 | 6371 days | 37% |
| Stolz | 7/10 | 6373 days | 34% |
| BrzezinskaM | 10/10 | 6375 days | 37% |
| AndreB | 10/10 | 6375 days | 37% |
| Linda | 7/10 | 6381 days | 34% |
| Susan | 8/10 | 6382 days | 36% |
| Byleveld | 7/10 | 6383 days | 34% |
| JoseB | 8/10 | 6384 days | 36% |
| JetteG | 10/10 | 6384 days | 37% |
| CarolF | 7/10 | 6385 days | 34% |
| Rachel | 9/10 | 6399 days | 37% |
| Claire | 7/10 | 6399 days | 34% |
| Denise | 8/10 | 6400 days | 36% |
| Denk | 8/10 | 6412 days | 36% |
| Klalis | 10/10 | 6414 days | 37% |
| Thomas | 4/10 | 6418 days | 20% |
| Mike | 5/10 | 6419 days | 25% |
| Debbie Mossman | 9/10 | 6424 days | 37% |
| Johann | 10/10 | 6426 days | 37% |
| Carina | 10/10 | 6428 days | 37% |
| Mat | 8/10 | 6467 days | 36% |
| Anette | 7/10 | 6469 days | 34% |
| midlands_missus | 8/10 | 6471 days | 36% |
| David | 7/10 | 6527 days | 34% |
| Suyin | 10/10 | 6547 days | 37% |
| Franz | 10/10 | 6721 days | 37% |
| Jennifer Baulch | 7/10 | 6726 days | 34% |
| George Jeffs | 10/10 | 6729 days | 37% |
| Jacob | 9/10 | 6733 days | 37% |
| Aharon | 10/10 | 6748 days | 37% |
| D.A. Mulder | 8/10 | 6749 days | 36% |
| Knol | 8/10 | 6751 days | 36% |
| Cole Penelope | 8/10 | 6754 days | 36% |
| Jody | 7/10 | 6762 days | 34% |
| Anna | 5/10 | 6762 days | 25% |
| Pauline Thai | 8/10 | 6769 days | 36% |
| Dan Adamson | 8/10 | 6769 days | 36% |
| Stephen Brightman | 8/10 | 6778 days | 36% |
| Madeleine Rowland | 8/10 | 6778 days | 36% |
| Bronwyn Gaby | 9/10 | 6796 days | 37% |
| Free_ride | 9/10 | 6812 days | 37% |
| Michael | 9/10 | 6835 days | 37% |
| Raul | 10/10 | 7085 days | 37% |
| TeamFlorida | 9/10 | 7087 days | 37% |
| TeamFlorida | 8/10 | 7087 days | 36% |
| James | 9/10 | 7100 days | 37% |
| Rudi | 10/10 | 7104 days | 37% |
| Rolf Kruger | 10/10 | 7128 days | 37% |
| Brian | 10/10 | 7132 days | 37% |
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
-2.38% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 109 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 | -2.34% |
| 198 | -2.36% |
| 199 | -2.37% |
| 200 | -2.38% |
| 201 | -2.39% |
| 202 | -2.40% |
| 203 | -2.42% |
| … | … |
Balancing Adjustment
2.69% 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.