G'day, 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 | 3252 days | 100% |
| Dan Coates | 9/10 | 3485 days | 78% |
| Dominik | 9/10 | 3485 days | 78% |
| Holloway | 10/10 | 3508 days | 76% |
| Christina | 6/10 | 3576 days | 59% |
| Barbara Knops | 9/10 | 3578 days | 69% |
| Manu Liberta | 10/10 | 3588 days | 68% |
| Bruno | 9/10 | 3598 days | 67% |
| Kirsty Smith | 10/10 | 3621 days | 65% |
| Sophia Satter | 8/10 | 3632 days | 63% |
| Afiya Levy | 10/10 | 3853 days | 43% |
| Johannes Eisel | 6/10 | 3862 days | 35% |
| Alexander Mattea | 5/10 | 3862 days | 30% |
| Timea Bagosi | 9/10 | 3864 days | 41% |
| Riviere | 8/10 | 3876 days | 39% |
| Dani | 8/10 | 3878 days | 39% |
| Benoit Leclerc | 7/10 | 3880 days | 36% |
| Anna Stoehr | 10/10 | 3898 days | 38% |
| Kai Krchmar | 6/10 | 3951 days | 27% |
| Kristina Farkas | 5/10 | 4246 days | 1% |
| Sophia Kadel | 10/10 | 4276 days | 1% |
| Laura and Marie | 7/10 | 4282 days | 0% |
| Rachel S | 10/10 | 4289 days | 0% |
| Joris Giullemot | 8/10 | 4598 days | 40% |
| Laura Metz | 7/10 | 4609 days | 37% |
| Hubertus Thost | 7/10 | 4609 days | 37% |
| Amanda | 4/10 | 4624 days | 24% |
| S B | 10/10 | 4637 days | 41% |
| M K | 10/10 | 4637 days | 41% |
| Maya Bakker-deDreu | 8/10 | 4645 days | 40% |
| Christin Woelk | 9/10 | 4925 days | 40% |
| Maria Klister | 7/10 | 4945 days | 37% |
| Lydia Kleinkoenen | 9/10 | 4965 days | 40% |
| Jessica Grewe | 9/10 | 4965 days | 40% |
| Hannah Lia-Isis Kubillus | 9/10 | 4965 days | 40% |
| Jan Zimmerman | 8/10 | 4976 days | 40% |
| Margaret and Derek McNeil | 10/10 | 5036 days | 41% |
| Frank and Suzanne | 8/10 | 5051 days | 40% |
| RollingMoon | 8/10 | 5112 days | 40% |
| Marcel & Kim Meichtry | 7/10 | 5332 days | 37% |
| Howell Davies | 5/10 | 5335 days | 29% |
| Baas | 7/10 | 5335 days | 37% |
| Pete & Pat Etheridge | 8/10 | 5335 days | 40% |
| Siegfried Richter | 7/10 | 5336 days | 37% |
| Melanie Mathiak | 10/10 | 5338 days | 41% |
| Sig Schrattner | 8/10 | 5338 days | 40% |
| Rebecca Doehl | 7/10 | 5339 days | 37% |
| Seth & Carla | 7/10 | 5340 days | 37% |
| Gabriele Wendt | 9/10 | 5340 days | 40% |
| Tadej Ferjan | 8/10 | 5340 days | 40% |
| Mary Mitchell | 10/10 | 5340 days | 41% |
| Emily Wikston | 9/10 | 5341 days | 40% |
| Andreas & Leonie Fehr | 10/10 | 5347 days | 41% |
| Horst Langstein | 9/10 | 5348 days | 40% |
| Marco Scheiber | 9/10 | 5349 days | 40% |
| Friedrich Kaltner | 10/10 | 5351 days | 41% |
| Frank & Julia | 10/10 | 5354 days | 41% |
| Thyg Lingdal | 10/10 | 5354 days | 41% |
| Nicole van Bergen | 8/10 | 5354 days | 40% |
| Mike & April Prince | 7/10 | 5368 days | 37% |
| Alfred & Henrike | 8/10 | 5380 days | 40% |
| Lyn Stainton | 6/10 | 5429 days | 34% |
| Ken Talan | 10/10 | 5657 days | 41% |
| Jon_and_Family | 9/10 | 5661 days | 40% |
| Gertz | 10/10 | 5665 days | 41% |
| Katarina Bokor | 8/10 | 5669 days | 40% |
| Mark Franklin | 6/10 | 5669 days | 34% |
| Gordon Agent | 10/10 | 5669 days | 41% |
| Maureen Hardy | 8/10 | 5669 days | 40% |
| AJ van Pelt | 8/10 | 5669 days | 40% |
| Werner and Rita | 9/10 | 5676 days | 40% |
| Richard Dudfield | 10/10 | 5678 days | 41% |
| Sayaka | 7/10 | 5678 days | 37% |
| Urs and Isabella | 7/10 | 5679 days | 37% |
| Juliane Kleiu | 10/10 | 5682 days | 41% |
| Linda Kremer | 9/10 | 5683 days | 40% |
| Rebecca Johnston | 9/10 | 5683 days | 40% |
| David Mellard | 10/10 | 5684 days | 41% |
| Bruce & Elaine Chote | 10/10 | 5684 days | 41% |
| Paul Nickson | 8/10 | 5684 days | 40% |
| Monique | 8/10 | 5684 days | 40% |
| Beat & Connie | 10/10 | 5686 days | 41% |
| Alex Stil | 9/10 | 5686 days | 40% |
| Pein van Nosrt | 7/10 | 5691 days | 37% |
| Raith | 9/10 | 5691 days | 40% |
| Elise van Haastert | 8/10 | 5691 days | 40% |
| Claudia | 10/10 | 5693 days | 41% |
| Carolin Ranner | 6/10 | 5693 days | 34% |
| Winskowsky | 9/10 | 5694 days | 40% |
| Hvid | 9/10 | 5708 days | 40% |
| Judith K. | 6/10 | 5710 days | 34% |
| Ruben and Jetske | 7/10 | 5710 days | 37% |
| Roy Seymour | 9/10 | 5711 days | 40% |
| Tom Hill | 10/10 | 5715 days | 41% |
| Ruua Reyrink | 7/10 | 5716 days | 37% |
| Patrick Hugener | 9/10 | 5716 days | 40% |
| JohnHaestad | 4/10 | 5720 days | 24% |
| dollimyxture | 10/10 | 5751 days | 41% |
| aggiemary04 | 10/10 | 5843 days | 41% |
| victoriauk | 4/10 | 5965 days | 24% |
| Baumgarten | 8/10 | 5993 days | 40% |
| travelbunnyadventures | 8/10 | 5996 days | 40% |
| Don & Geraldine | 10/10 | 6032 days | 41% |
| Matthias & Ceristiane | 8/10 | 6044 days | 40% |
| Hilary and Chris Ayton | 9/10 | 6045 days | 40% |
| Lis & Rob Tate | 9/10 | 6047 days | 40% |
| ccthornton100 | 10/10 | 6057 days | 41% |
| Bob Kusesia | 10/10 | 6058 days | 41% |
| Yssel de Schepper | 7/10 | 6063 days | 37% |
| Janny Meerdinnk Veldboow | 7/10 | 6063 days | 37% |
| Arie Ascher | 9/10 | 6064 days | 40% |
| Wolfgang Engelke | 10/10 | 6066 days | 41% |
| Thomas K | 9/10 | 6066 days | 40% |
| Loleit | 7/10 | 6078 days | 37% |
| Mattias Thorm | 9/10 | 6079 days | 40% |
| Vincente Garrido | 4/10 | 6080 days | 24% |
| R Gilge | 10/10 | 6081 days | 41% |
| Erik Hummelmose | 8/10 | 6081 days | 40% |
| Ian E | 6/10 | 6081 days | 34% |
| Nadine Schaee | 9/10 | 6082 days | 40% |
| Belinda Godhard | 2/10 | 6082 days | 14% |
| Uwe Rieper | 10/10 | 6084 days | 41% |
| E.M. Prideaux | 10/10 | 6099 days | 41% |
| Elizabeth E | 8/10 | 6101 days | 40% |
| Stevens Frans | 8/10 | 6102 days | 40% |
| Heinrich Hax | 9/10 | 6105 days | 40% |
| tanh | 7/10 | 6132 days | 37% |
| Stephanie Steiner | 8/10 | 6151 days | 40% |
| Julia May | 9/10 | 6158 days | 40% |
| X Neils | 7/10 | 6169 days | 37% |
| Sarah Smith | 5/10 | 6173 days | 29% |
| Anna | 6/10 | 6177 days | 34% |
| OliverG1 | 7/10 | 6379 days | 37% |
| Philipp | 5/10 | 6391 days | 29% |
| JasminA | 5/10 | 6391 days | 29% |
| ChristinaV | 8/10 | 6400 days | 40% |
| JuergenSchnitzer | 9/10 | 6407 days | 40% |
| AstridVG | 7/10 | 6407 days | 37% |
| NatasjaV | 7/10 | 6409 days | 37% |
| JimmyK | 7/10 | 6409 days | 37% |
| MarcoJ | 9/10 | 6411 days | 40% |
| LucyPoland | 9/10 | 6412 days | 40% |
| Stolz | 7/10 | 6414 days | 37% |
| BrzezinskaM | 10/10 | 6416 days | 41% |
| AndreB | 10/10 | 6416 days | 41% |
| Linda | 7/10 | 6422 days | 37% |
| Susan | 8/10 | 6423 days | 40% |
| Byleveld | 7/10 | 6424 days | 37% |
| JoseB | 8/10 | 6425 days | 40% |
| JetteG | 10/10 | 6425 days | 41% |
| CarolF | 7/10 | 6426 days | 37% |
| Rachel | 9/10 | 6440 days | 40% |
| Claire | 7/10 | 6440 days | 37% |
| Denise | 8/10 | 6441 days | 40% |
| Denk | 8/10 | 6453 days | 40% |
| Klalis | 10/10 | 6455 days | 41% |
| Thomas | 4/10 | 6459 days | 24% |
| Mike | 5/10 | 6460 days | 29% |
| Debbie Mossman | 9/10 | 6465 days | 40% |
| Johann | 10/10 | 6467 days | 41% |
| Carina | 10/10 | 6469 days | 41% |
| Mat | 8/10 | 6508 days | 40% |
| Anette | 7/10 | 6510 days | 37% |
| midlands_missus | 8/10 | 6512 days | 40% |
| David | 7/10 | 6568 days | 37% |
| Suyin | 10/10 | 6588 days | 41% |
| Franz | 10/10 | 6762 days | 41% |
| Jennifer Baulch | 7/10 | 6767 days | 37% |
| George Jeffs | 10/10 | 6770 days | 41% |
| Jacob | 9/10 | 6774 days | 40% |
| Aharon | 10/10 | 6789 days | 41% |
| D.A. Mulder | 8/10 | 6790 days | 40% |
| Knol | 8/10 | 6792 days | 40% |
| Cole Penelope | 8/10 | 6795 days | 40% |
| Jody | 7/10 | 6803 days | 37% |
| Anna | 5/10 | 6803 days | 29% |
| Pauline Thai | 8/10 | 6810 days | 40% |
| Dan Adamson | 8/10 | 6810 days | 40% |
| Stephen Brightman | 8/10 | 6819 days | 40% |
| Madeleine Rowland | 8/10 | 6819 days | 40% |
| Bronwyn Gaby | 9/10 | 6837 days | 40% |
| Free_ride | 9/10 | 6853 days | 40% |
| Michael | 9/10 | 6876 days | 40% |
| Raul | 10/10 | 7126 days | 41% |
| TeamFlorida | 9/10 | 7128 days | 40% |
| TeamFlorida | 8/10 | 7128 days | 40% |
| James | 9/10 | 7141 days | 40% |
| Rudi | 10/10 | 7145 days | 41% |
| Rolf Kruger | 10/10 | 7169 days | 41% |
| Brian | 10/10 | 7173 days | 41% |
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
-3.25% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 68 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 | -3.20% |
| 198 | -3.22% |
| 199 | -3.23% |
| 200 | -3.25% |
| 201 | -3.27% |
| 202 | -3.28% |
| 203 | -3.30% |
| … | … |
Balancing Adjustment
2.92% 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.