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
83.67%
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 | 2954 days | 100% |
| Dan Coates | 9/10 | 3187 days | 83% |
| Dominik | 9/10 | 3187 days | 83% |
| Holloway | 10/10 | 3210 days | 82% |
| Christina | 6/10 | 3278 days | 66% |
| Barbara Knops | 9/10 | 3280 days | 77% |
| Manu Liberta | 10/10 | 3290 days | 77% |
| Bruno | 9/10 | 3300 days | 75% |
| Kirsty Smith | 10/10 | 3323 days | 74% |
| Sophia Satter | 8/10 | 3334 days | 72% |
| Afiya Levy | 10/10 | 3555 days | 57% |
| Johannes Eisel | 6/10 | 3564 days | 49% |
| Alexander Mattea | 5/10 | 3564 days | 43% |
| Timea Bagosi | 9/10 | 3566 days | 56% |
| Riviere | 8/10 | 3578 days | 55% |
| Dani | 8/10 | 3580 days | 54% |
| Benoit Leclerc | 7/10 | 3582 days | 51% |
| Anna Stoehr | 10/10 | 3600 days | 54% |
| Kai Krchmar | 6/10 | 3653 days | 43% |
| Kristina Farkas | 5/10 | 3948 days | 22% |
| Sophia Kadel | 10/10 | 3978 days | 27% |
| Laura and Marie | 7/10 | 3984 days | 24% |
| Rachel S | 10/10 | 3991 days | 26% |
| Joris Giullemot | 8/10 | 4300 days | 3% |
| Laura Metz | 7/10 | 4311 days | 2% |
| Hubertus Thost | 7/10 | 4311 days | 2% |
| Amanda | 4/10 | 4326 days | 0% |
| S B | 10/10 | 4339 days | 1% |
| M K | 10/10 | 4339 days | 1% |
| Maya Bakker-deDreu | 8/10 | 4347 days | 0% |
| Christin Woelk | 9/10 | 4627 days | 34% |
| Maria Klister | 7/10 | 4647 days | 32% |
| Lydia Kleinkoenen | 9/10 | 4667 days | 34% |
| Jessica Grewe | 9/10 | 4667 days | 34% |
| Hannah Lia-Isis Kubillus | 9/10 | 4667 days | 34% |
| Jan Zimmerman | 8/10 | 4678 days | 34% |
| Margaret and Derek McNeil | 10/10 | 4738 days | 35% |
| Frank and Suzanne | 8/10 | 4753 days | 34% |
| RollingMoon | 8/10 | 4814 days | 34% |
| Marcel & Kim Meichtry | 7/10 | 5034 days | 32% |
| Howell Davies | 5/10 | 5037 days | 26% |
| Baas | 7/10 | 5037 days | 32% |
| Pete & Pat Etheridge | 8/10 | 5037 days | 34% |
| Siegfried Richter | 7/10 | 5038 days | 32% |
| Melanie Mathiak | 10/10 | 5040 days | 35% |
| Sig Schrattner | 8/10 | 5040 days | 34% |
| Rebecca Doehl | 7/10 | 5041 days | 32% |
| Seth & Carla | 7/10 | 5042 days | 32% |
| Gabriele Wendt | 9/10 | 5042 days | 34% |
| Tadej Ferjan | 8/10 | 5042 days | 34% |
| Mary Mitchell | 10/10 | 5042 days | 35% |
| Emily Wikston | 9/10 | 5043 days | 34% |
| Andreas & Leonie Fehr | 10/10 | 5049 days | 35% |
| Horst Langstein | 9/10 | 5050 days | 34% |
| Marco Scheiber | 9/10 | 5051 days | 34% |
| Friedrich Kaltner | 10/10 | 5053 days | 35% |
| Frank & Julia | 10/10 | 5056 days | 35% |
| Thyg Lingdal | 10/10 | 5056 days | 35% |
| Nicole van Bergen | 8/10 | 5056 days | 34% |
| Mike & April Prince | 7/10 | 5070 days | 32% |
| Alfred & Henrike | 8/10 | 5082 days | 34% |
| Lyn Stainton | 6/10 | 5131 days | 30% |
| Ken Talan | 10/10 | 5359 days | 35% |
| Jon_and_Family | 9/10 | 5363 days | 34% |
| Gertz | 10/10 | 5367 days | 35% |
| Katarina Bokor | 8/10 | 5371 days | 34% |
| Mark Franklin | 6/10 | 5371 days | 30% |
| Gordon Agent | 10/10 | 5371 days | 35% |
| Maureen Hardy | 8/10 | 5371 days | 34% |
| AJ van Pelt | 8/10 | 5371 days | 34% |
| Werner and Rita | 9/10 | 5378 days | 34% |
| Richard Dudfield | 10/10 | 5380 days | 35% |
| Sayaka | 7/10 | 5380 days | 32% |
| Urs and Isabella | 7/10 | 5381 days | 32% |
| Juliane Kleiu | 10/10 | 5384 days | 35% |
| Linda Kremer | 9/10 | 5385 days | 34% |
| Rebecca Johnston | 9/10 | 5385 days | 34% |
| David Mellard | 10/10 | 5386 days | 35% |
| Bruce & Elaine Chote | 10/10 | 5386 days | 35% |
| Paul Nickson | 8/10 | 5386 days | 34% |
| Monique | 8/10 | 5386 days | 34% |
| Beat & Connie | 10/10 | 5388 days | 35% |
| Alex Stil | 9/10 | 5388 days | 34% |
| Pein van Nosrt | 7/10 | 5393 days | 32% |
| Raith | 9/10 | 5393 days | 34% |
| Elise van Haastert | 8/10 | 5393 days | 34% |
| Claudia | 10/10 | 5395 days | 35% |
| Carolin Ranner | 6/10 | 5395 days | 30% |
| Winskowsky | 9/10 | 5396 days | 34% |
| Hvid | 9/10 | 5410 days | 34% |
| Judith K. | 6/10 | 5412 days | 30% |
| Ruben and Jetske | 7/10 | 5412 days | 32% |
| Roy Seymour | 9/10 | 5413 days | 34% |
| Tom Hill | 10/10 | 5417 days | 35% |
| Ruua Reyrink | 7/10 | 5418 days | 32% |
| Patrick Hugener | 9/10 | 5418 days | 34% |
| JohnHaestad | 4/10 | 5422 days | 22% |
| dollimyxture | 10/10 | 5453 days | 35% |
| aggiemary04 | 10/10 | 5545 days | 35% |
| victoriauk | 4/10 | 5667 days | 22% |
| Baumgarten | 8/10 | 5695 days | 34% |
| travelbunnyadventures | 8/10 | 5698 days | 34% |
| Don & Geraldine | 10/10 | 5734 days | 35% |
| Matthias & Ceristiane | 8/10 | 5746 days | 34% |
| Hilary and Chris Ayton | 9/10 | 5747 days | 34% |
| Lis & Rob Tate | 9/10 | 5749 days | 34% |
| ccthornton100 | 10/10 | 5759 days | 35% |
| Bob Kusesia | 10/10 | 5760 days | 35% |
| Yssel de Schepper | 7/10 | 5765 days | 32% |
| Janny Meerdinnk Veldboow | 7/10 | 5765 days | 32% |
| Arie Ascher | 9/10 | 5766 days | 34% |
| Wolfgang Engelke | 10/10 | 5768 days | 35% |
| Thomas K | 9/10 | 5768 days | 34% |
| Loleit | 7/10 | 5780 days | 32% |
| Mattias Thorm | 9/10 | 5781 days | 34% |
| Vincente Garrido | 4/10 | 5782 days | 22% |
| R Gilge | 10/10 | 5783 days | 35% |
| Erik Hummelmose | 8/10 | 5783 days | 34% |
| Ian E | 6/10 | 5783 days | 30% |
| Nadine Schaee | 9/10 | 5784 days | 34% |
| Belinda Godhard | 2/10 | 5784 days | 15% |
| Uwe Rieper | 10/10 | 5786 days | 35% |
| E.M. Prideaux | 10/10 | 5801 days | 35% |
| Elizabeth E | 8/10 | 5803 days | 34% |
| Stevens Frans | 8/10 | 5804 days | 34% |
| Heinrich Hax | 9/10 | 5807 days | 34% |
| tanh | 7/10 | 5834 days | 32% |
| Stephanie Steiner | 8/10 | 5853 days | 34% |
| Julia May | 9/10 | 5860 days | 34% |
| X Neils | 7/10 | 5871 days | 32% |
| Sarah Smith | 5/10 | 5875 days | 26% |
| Anna | 6/10 | 5879 days | 30% |
| OliverG1 | 7/10 | 6081 days | 32% |
| Philipp | 5/10 | 6093 days | 26% |
| JasminA | 5/10 | 6093 days | 26% |
| ChristinaV | 8/10 | 6102 days | 34% |
| JuergenSchnitzer | 9/10 | 6109 days | 34% |
| AstridVG | 7/10 | 6109 days | 32% |
| NatasjaV | 7/10 | 6111 days | 32% |
| JimmyK | 7/10 | 6111 days | 32% |
| MarcoJ | 9/10 | 6113 days | 34% |
| LucyPoland | 9/10 | 6114 days | 34% |
| Stolz | 7/10 | 6116 days | 32% |
| BrzezinskaM | 10/10 | 6118 days | 35% |
| AndreB | 10/10 | 6118 days | 35% |
| Linda | 7/10 | 6124 days | 32% |
| Susan | 8/10 | 6125 days | 34% |
| Byleveld | 7/10 | 6126 days | 32% |
| JoseB | 8/10 | 6127 days | 34% |
| JetteG | 10/10 | 6127 days | 35% |
| CarolF | 7/10 | 6128 days | 32% |
| Rachel | 9/10 | 6142 days | 34% |
| Claire | 7/10 | 6142 days | 32% |
| Denise | 8/10 | 6143 days | 34% |
| Denk | 8/10 | 6155 days | 34% |
| Klalis | 10/10 | 6157 days | 35% |
| Thomas | 4/10 | 6161 days | 22% |
| Mike | 5/10 | 6162 days | 26% |
| Debbie Mossman | 9/10 | 6168 days | 34% |
| Johann | 10/10 | 6169 days | 35% |
| Carina | 10/10 | 6171 days | 35% |
| Mat | 8/10 | 6210 days | 34% |
| Anette | 7/10 | 6212 days | 32% |
| midlands_missus | 8/10 | 6215 days | 34% |
| David | 7/10 | 6270 days | 32% |
| Suyin | 10/10 | 6290 days | 35% |
| Franz | 10/10 | 6464 days | 35% |
| Jennifer Baulch | 7/10 | 6469 days | 32% |
| George Jeffs | 10/10 | 6472 days | 35% |
| Jacob | 9/10 | 6476 days | 34% |
| Aharon | 10/10 | 6491 days | 35% |
| D.A. Mulder | 8/10 | 6492 days | 34% |
| Knol | 8/10 | 6494 days | 34% |
| Cole Penelope | 8/10 | 6497 days | 34% |
| Jody | 7/10 | 6505 days | 32% |
| Anna | 5/10 | 6505 days | 26% |
| Pauline Thai | 8/10 | 6512 days | 34% |
| Dan Adamson | 8/10 | 6512 days | 34% |
| Stephen Brightman | 8/10 | 6521 days | 34% |
| Madeleine Rowland | 8/10 | 6521 days | 34% |
| Bronwyn Gaby | 9/10 | 6539 days | 34% |
| Free_ride | 9/10 | 6555 days | 34% |
| Michael | 9/10 | 6578 days | 34% |
| Raul | 10/10 | 6828 days | 35% |
| TeamFlorida | 9/10 | 6830 days | 34% |
| TeamFlorida | 8/10 | 6830 days | 34% |
| James | 9/10 | 6843 days | 34% |
| Rudi | 10/10 | 6847 days | 35% |
| Rolf Kruger | 10/10 | 6871 days | 35% |
| Brian | 10/10 | 6875 days | 35% |
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
-4.07% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 42 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 | -4.01% |
| 198 | -4.03% |
| 199 | -4.05% |
| 200 | -4.07% |
| 201 | -4.09% |
| 202 | -4.11% |
| 203 | -4.13% |
| … | … |
Balancing Adjustment
3.11% 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.