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
83.50%
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 | 2512 days | 100% |
| Dan Coates | 9/10 | 2745 days | 87% |
| Dominik | 9/10 | 2745 days | 87% |
| Holloway | 10/10 | 2768 days | 87% |
| Christina | 6/10 | 2836 days | 72% |
| Barbara Knops | 9/10 | 2838 days | 82% |
| Manu Liberta | 10/10 | 2848 days | 83% |
| Bruno | 9/10 | 2858 days | 81% |
| Kirsty Smith | 10/10 | 2881 days | 81% |
| Sophia Satter | 8/10 | 2892 days | 79% |
| Afiya Levy | 10/10 | 3113 days | 68% |
| Johannes Eisel | 6/10 | 3122 days | 58% |
| Alexander Mattea | 5/10 | 3122 days | 52% |
| Timea Bagosi | 9/10 | 3124 days | 67% |
| Riviere | 8/10 | 3136 days | 66% |
| Dani | 8/10 | 3138 days | 66% |
| Benoit Leclerc | 7/10 | 3140 days | 62% |
| Anna Stoehr | 10/10 | 3158 days | 66% |
| Kai Krchmar | 6/10 | 3211 days | 54% |
| Kristina Farkas | 5/10 | 3506 days | 36% |
| Sophia Kadel | 10/10 | 3536 days | 45% |
| Laura and Marie | 7/10 | 3542 days | 42% |
| Rachel S | 10/10 | 3549 days | 45% |
| Joris Giullemot | 8/10 | 3858 days | 27% |
| Laura Metz | 7/10 | 3869 days | 25% |
| Hubertus Thost | 7/10 | 3869 days | 25% |
| Amanda | 4/10 | 3884 days | 17% |
| S B | 10/10 | 3897 days | 26% |
| M K | 10/10 | 3897 days | 26% |
| Maya Bakker-deDreu | 8/10 | 3905 days | 25% |
| Christin Woelk | 9/10 | 4185 days | 10% |
| Maria Klister | 7/10 | 4205 days | 8% |
| Lydia Kleinkoenen | 9/10 | 4225 days | 8% |
| Jessica Grewe | 9/10 | 4225 days | 8% |
| Hannah Lia-Isis Kubillus | 9/10 | 4225 days | 8% |
| Jan Zimmerman | 8/10 | 4236 days | 7% |
| Margaret and Derek McNeil | 10/10 | 4296 days | 4% |
| Frank and Suzanne | 8/10 | 4311 days | 3% |
| RollingMoon | 8/10 | 4372 days | 0% |
| Marcel & Kim Meichtry | 7/10 | 4592 days | 25% |
| Howell Davies | 5/10 | 4595 days | 21% |
| Baas | 7/10 | 4595 days | 25% |
| Pete & Pat Etheridge | 8/10 | 4595 days | 27% |
| Siegfried Richter | 7/10 | 4596 days | 25% |
| Melanie Mathiak | 10/10 | 4598 days | 27% |
| Sig Schrattner | 8/10 | 4598 days | 27% |
| Rebecca Doehl | 7/10 | 4599 days | 25% |
| Seth & Carla | 7/10 | 4600 days | 25% |
| Gabriele Wendt | 9/10 | 4600 days | 27% |
| Tadej Ferjan | 8/10 | 4600 days | 27% |
| Mary Mitchell | 10/10 | 4600 days | 27% |
| Emily Wikston | 9/10 | 4601 days | 27% |
| Andreas & Leonie Fehr | 10/10 | 4607 days | 27% |
| Horst Langstein | 9/10 | 4608 days | 27% |
| Marco Scheiber | 9/10 | 4609 days | 27% |
| Friedrich Kaltner | 10/10 | 4611 days | 27% |
| Frank & Julia | 10/10 | 4614 days | 27% |
| Thyg Lingdal | 10/10 | 4614 days | 27% |
| Nicole van Bergen | 8/10 | 4614 days | 27% |
| Mike & April Prince | 7/10 | 4628 days | 25% |
| Alfred & Henrike | 8/10 | 4640 days | 27% |
| Lyn Stainton | 6/10 | 4689 days | 23% |
| Ken Talan | 10/10 | 4917 days | 27% |
| Jon_and_Family | 9/10 | 4921 days | 27% |
| Gertz | 10/10 | 4925 days | 27% |
| Katarina Bokor | 8/10 | 4929 days | 27% |
| Mark Franklin | 6/10 | 4929 days | 23% |
| Gordon Agent | 10/10 | 4929 days | 27% |
| Maureen Hardy | 8/10 | 4929 days | 27% |
| AJ van Pelt | 8/10 | 4929 days | 27% |
| Werner and Rita | 9/10 | 4936 days | 27% |
| Richard Dudfield | 10/10 | 4938 days | 27% |
| Sayaka | 7/10 | 4938 days | 25% |
| Urs and Isabella | 7/10 | 4939 days | 25% |
| Juliane Kleiu | 10/10 | 4942 days | 27% |
| Linda Kremer | 9/10 | 4943 days | 27% |
| Rebecca Johnston | 9/10 | 4943 days | 27% |
| David Mellard | 10/10 | 4944 days | 27% |
| Bruce & Elaine Chote | 10/10 | 4944 days | 27% |
| Paul Nickson | 8/10 | 4944 days | 27% |
| Monique | 8/10 | 4944 days | 27% |
| Beat & Connie | 10/10 | 4946 days | 27% |
| Alex Stil | 9/10 | 4946 days | 27% |
| Pein van Nosrt | 7/10 | 4951 days | 25% |
| Raith | 9/10 | 4951 days | 27% |
| Elise van Haastert | 8/10 | 4951 days | 27% |
| Claudia | 10/10 | 4953 days | 27% |
| Carolin Ranner | 6/10 | 4953 days | 23% |
| Winskowsky | 9/10 | 4954 days | 27% |
| Hvid | 9/10 | 4968 days | 27% |
| Judith K. | 6/10 | 4970 days | 23% |
| Ruben and Jetske | 7/10 | 4970 days | 25% |
| Roy Seymour | 9/10 | 4971 days | 27% |
| Tom Hill | 10/10 | 4975 days | 27% |
| Ruua Reyrink | 7/10 | 4976 days | 25% |
| Patrick Hugener | 9/10 | 4976 days | 27% |
| JohnHaestad | 4/10 | 4980 days | 18% |
| dollimyxture | 10/10 | 5011 days | 27% |
| aggiemary04 | 10/10 | 5103 days | 27% |
| victoriauk | 4/10 | 5225 days | 18% |
| Baumgarten | 8/10 | 5253 days | 27% |
| travelbunnyadventures | 8/10 | 5256 days | 27% |
| Don & Geraldine | 10/10 | 5292 days | 27% |
| Matthias & Ceristiane | 8/10 | 5304 days | 27% |
| Hilary and Chris Ayton | 9/10 | 5305 days | 27% |
| Lis & Rob Tate | 9/10 | 5307 days | 27% |
| ccthornton100 | 10/10 | 5317 days | 27% |
| Bob Kusesia | 10/10 | 5318 days | 27% |
| Yssel de Schepper | 7/10 | 5323 days | 25% |
| Janny Meerdinnk Veldboow | 7/10 | 5323 days | 25% |
| Arie Ascher | 9/10 | 5324 days | 27% |
| Wolfgang Engelke | 10/10 | 5326 days | 27% |
| Thomas K | 9/10 | 5326 days | 27% |
| Loleit | 7/10 | 5338 days | 25% |
| Mattias Thorm | 9/10 | 5339 days | 27% |
| Vincente Garrido | 4/10 | 5340 days | 18% |
| R Gilge | 10/10 | 5341 days | 27% |
| Erik Hummelmose | 8/10 | 5341 days | 27% |
| Ian E | 6/10 | 5341 days | 23% |
| Nadine Schaee | 9/10 | 5342 days | 27% |
| Belinda Godhard | 2/10 | 5342 days | 12% |
| Uwe Rieper | 10/10 | 5344 days | 27% |
| E.M. Prideaux | 10/10 | 5359 days | 27% |
| Elizabeth E | 8/10 | 5361 days | 27% |
| Stevens Frans | 8/10 | 5362 days | 27% |
| Heinrich Hax | 9/10 | 5365 days | 27% |
| tanh | 7/10 | 5392 days | 25% |
| Stephanie Steiner | 8/10 | 5411 days | 27% |
| Julia May | 9/10 | 5418 days | 27% |
| X Neils | 7/10 | 5429 days | 25% |
| Sarah Smith | 5/10 | 5433 days | 21% |
| Anna | 6/10 | 5437 days | 23% |
| OliverG1 | 7/10 | 5639 days | 25% |
| Philipp | 5/10 | 5651 days | 21% |
| JasminA | 5/10 | 5651 days | 21% |
| ChristinaV | 8/10 | 5660 days | 27% |
| JuergenSchnitzer | 9/10 | 5667 days | 27% |
| AstridVG | 7/10 | 5667 days | 25% |
| NatasjaV | 7/10 | 5669 days | 25% |
| JimmyK | 7/10 | 5669 days | 25% |
| MarcoJ | 9/10 | 5671 days | 27% |
| LucyPoland | 9/10 | 5672 days | 27% |
| Stolz | 7/10 | 5674 days | 25% |
| BrzezinskaM | 10/10 | 5676 days | 27% |
| AndreB | 10/10 | 5676 days | 27% |
| Linda | 7/10 | 5682 days | 25% |
| Susan | 8/10 | 5683 days | 27% |
| Byleveld | 7/10 | 5684 days | 25% |
| JoseB | 8/10 | 5685 days | 27% |
| JetteG | 10/10 | 5685 days | 27% |
| CarolF | 7/10 | 5686 days | 25% |
| Rachel | 9/10 | 5700 days | 27% |
| Claire | 7/10 | 5700 days | 25% |
| Denise | 8/10 | 5701 days | 27% |
| Denk | 8/10 | 5713 days | 27% |
| Klalis | 10/10 | 5715 days | 27% |
| Thomas | 4/10 | 5719 days | 18% |
| Mike | 5/10 | 5720 days | 21% |
| Debbie Mossman | 9/10 | 5725 days | 27% |
| Johann | 10/10 | 5727 days | 27% |
| Carina | 10/10 | 5729 days | 27% |
| Mat | 8/10 | 5768 days | 27% |
| Anette | 7/10 | 5770 days | 25% |
| midlands_missus | 8/10 | 5772 days | 27% |
| David | 7/10 | 5828 days | 25% |
| Suyin | 10/10 | 5848 days | 27% |
| Franz | 10/10 | 6022 days | 27% |
| Jennifer Baulch | 7/10 | 6027 days | 25% |
| George Jeffs | 10/10 | 6030 days | 27% |
| Jacob | 9/10 | 6034 days | 27% |
| Aharon | 10/10 | 6049 days | 27% |
| D.A. Mulder | 8/10 | 6050 days | 27% |
| Knol | 8/10 | 6052 days | 27% |
| Cole Penelope | 8/10 | 6055 days | 27% |
| Jody | 7/10 | 6063 days | 25% |
| Anna | 5/10 | 6063 days | 21% |
| Pauline Thai | 8/10 | 6070 days | 27% |
| Dan Adamson | 8/10 | 6070 days | 27% |
| Stephen Brightman | 8/10 | 6079 days | 27% |
| Madeleine Rowland | 8/10 | 6079 days | 27% |
| Bronwyn Gaby | 9/10 | 6097 days | 27% |
| Free_ride | 9/10 | 6112 days | 27% |
| Michael | 9/10 | 6136 days | 27% |
| Raul | 10/10 | 6386 days | 27% |
| TeamFlorida | 9/10 | 6388 days | 27% |
| TeamFlorida | 8/10 | 6388 days | 27% |
| James | 9/10 | 6401 days | 27% |
| Rudi | 10/10 | 6405 days | 27% |
| Rolf Kruger | 10/10 | 6429 days | 27% |
| Brian | 10/10 | 6433 days | 27% |
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
-3.05% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 74 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 | -3.01% |
| 198 | -3.02% |
| 199 | -3.04% |
| 200 | -3.05% |
| 201 | -3.07% |
| 202 | -3.08% |
| 203 | -3.10% |
| … | … |
Balancing Adjustment
2.87% 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.