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
83.48%
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 | 2552 days | 100% |
| Dan Coates | 9/10 | 2785 days | 87% |
| Dominik | 9/10 | 2785 days | 87% |
| Holloway | 10/10 | 2808 days | 87% |
| Christina | 6/10 | 2876 days | 71% |
| Barbara Knops | 9/10 | 2878 days | 82% |
| Manu Liberta | 10/10 | 2888 days | 82% |
| Bruno | 9/10 | 2898 days | 81% |
| Kirsty Smith | 10/10 | 2921 days | 80% |
| Sophia Satter | 8/10 | 2932 days | 78% |
| Afiya Levy | 10/10 | 3153 days | 67% |
| Johannes Eisel | 6/10 | 3162 days | 57% |
| Alexander Mattea | 5/10 | 3162 days | 51% |
| Timea Bagosi | 9/10 | 3165 days | 66% |
| Riviere | 8/10 | 3176 days | 65% |
| Dani | 8/10 | 3178 days | 65% |
| Benoit Leclerc | 7/10 | 3180 days | 61% |
| Anna Stoehr | 10/10 | 3198 days | 65% |
| Kai Krchmar | 6/10 | 3251 days | 53% |
| Kristina Farkas | 5/10 | 3546 days | 34% |
| Sophia Kadel | 10/10 | 3576 days | 44% |
| Laura and Marie | 7/10 | 3582 days | 40% |
| Rachel S | 10/10 | 3590 days | 43% |
| Joris Giullemot | 8/10 | 3898 days | 25% |
| Laura Metz | 7/10 | 3909 days | 23% |
| Hubertus Thost | 7/10 | 3909 days | 23% |
| Amanda | 4/10 | 3924 days | 15% |
| S B | 10/10 | 3937 days | 23% |
| M K | 10/10 | 3937 days | 23% |
| Maya Bakker-deDreu | 8/10 | 3945 days | 22% |
| Christin Woelk | 9/10 | 4225 days | 7% |
| Maria Klister | 7/10 | 4245 days | 5% |
| Lydia Kleinkoenen | 9/10 | 4265 days | 5% |
| Jessica Grewe | 9/10 | 4265 days | 5% |
| Hannah Lia-Isis Kubillus | 9/10 | 4265 days | 5% |
| Jan Zimmerman | 8/10 | 4276 days | 4% |
| Margaret and Derek McNeil | 10/10 | 4336 days | 1% |
| Frank and Suzanne | 8/10 | 4351 days | 0% |
| RollingMoon | 8/10 | 4412 days | 27% |
| Marcel & Kim Meichtry | 7/10 | 4632 days | 25% |
| Howell Davies | 5/10 | 4635 days | 20% |
| Baas | 7/10 | 4635 days | 25% |
| Pete & Pat Etheridge | 8/10 | 4635 days | 27% |
| Siegfried Richter | 7/10 | 4636 days | 25% |
| Melanie Mathiak | 10/10 | 4638 days | 27% |
| Sig Schrattner | 8/10 | 4638 days | 27% |
| Rebecca Doehl | 7/10 | 4639 days | 25% |
| Seth & Carla | 7/10 | 4640 days | 25% |
| Gabriele Wendt | 9/10 | 4640 days | 27% |
| Tadej Ferjan | 8/10 | 4640 days | 27% |
| Mary Mitchell | 10/10 | 4640 days | 27% |
| Emily Wikston | 9/10 | 4641 days | 27% |
| Andreas & Leonie Fehr | 10/10 | 4647 days | 27% |
| Horst Langstein | 9/10 | 4648 days | 27% |
| Marco Scheiber | 9/10 | 4649 days | 27% |
| Friedrich Kaltner | 10/10 | 4651 days | 27% |
| Frank & Julia | 10/10 | 4654 days | 27% |
| Thyg Lingdal | 10/10 | 4654 days | 27% |
| Nicole van Bergen | 8/10 | 4654 days | 27% |
| Mike & April Prince | 7/10 | 4668 days | 25% |
| Alfred & Henrike | 8/10 | 4680 days | 27% |
| Lyn Stainton | 6/10 | 4729 days | 23% |
| Ken Talan | 10/10 | 4957 days | 27% |
| Jon_and_Family | 9/10 | 4961 days | 27% |
| Gertz | 10/10 | 4965 days | 27% |
| Katarina Bokor | 8/10 | 4969 days | 27% |
| Mark Franklin | 6/10 | 4969 days | 23% |
| Gordon Agent | 10/10 | 4969 days | 27% |
| Maureen Hardy | 8/10 | 4969 days | 27% |
| AJ van Pelt | 8/10 | 4969 days | 27% |
| Werner and Rita | 9/10 | 4976 days | 27% |
| Richard Dudfield | 10/10 | 4978 days | 27% |
| Sayaka | 7/10 | 4978 days | 25% |
| Urs and Isabella | 7/10 | 4979 days | 25% |
| Juliane Kleiu | 10/10 | 4982 days | 27% |
| Linda Kremer | 9/10 | 4983 days | 27% |
| Rebecca Johnston | 9/10 | 4983 days | 27% |
| David Mellard | 10/10 | 4984 days | 27% |
| Bruce & Elaine Chote | 10/10 | 4984 days | 27% |
| Paul Nickson | 8/10 | 4984 days | 27% |
| Monique | 8/10 | 4984 days | 27% |
| Beat & Connie | 10/10 | 4986 days | 27% |
| Alex Stil | 9/10 | 4986 days | 27% |
| Pein van Nosrt | 7/10 | 4991 days | 25% |
| Raith | 9/10 | 4991 days | 27% |
| Elise van Haastert | 8/10 | 4991 days | 27% |
| Claudia | 10/10 | 4993 days | 27% |
| Carolin Ranner | 6/10 | 4993 days | 23% |
| Winskowsky | 9/10 | 4994 days | 27% |
| Hvid | 9/10 | 5008 days | 27% |
| Judith K. | 6/10 | 5010 days | 23% |
| Ruben and Jetske | 7/10 | 5010 days | 25% |
| Roy Seymour | 9/10 | 5011 days | 27% |
| Tom Hill | 10/10 | 5015 days | 27% |
| Ruua Reyrink | 7/10 | 5016 days | 25% |
| Patrick Hugener | 9/10 | 5016 days | 27% |
| JohnHaestad | 4/10 | 5020 days | 17% |
| dollimyxture | 10/10 | 5051 days | 27% |
| aggiemary04 | 10/10 | 5143 days | 27% |
| victoriauk | 4/10 | 5265 days | 17% |
| Baumgarten | 8/10 | 5293 days | 27% |
| travelbunnyadventures | 8/10 | 5296 days | 27% |
| Don & Geraldine | 10/10 | 5332 days | 27% |
| Matthias & Ceristiane | 8/10 | 5344 days | 27% |
| Hilary and Chris Ayton | 9/10 | 5345 days | 27% |
| Lis & Rob Tate | 9/10 | 5347 days | 27% |
| ccthornton100 | 10/10 | 5357 days | 27% |
| Bob Kusesia | 10/10 | 5358 days | 27% |
| Yssel de Schepper | 7/10 | 5363 days | 25% |
| Janny Meerdinnk Veldboow | 7/10 | 5363 days | 25% |
| Arie Ascher | 9/10 | 5364 days | 27% |
| Wolfgang Engelke | 10/10 | 5366 days | 27% |
| Thomas K | 9/10 | 5366 days | 27% |
| Loleit | 7/10 | 5378 days | 25% |
| Mattias Thorm | 9/10 | 5379 days | 27% |
| Vincente Garrido | 4/10 | 5380 days | 17% |
| R Gilge | 10/10 | 5381 days | 27% |
| Erik Hummelmose | 8/10 | 5381 days | 27% |
| Ian E | 6/10 | 5381 days | 23% |
| Nadine Schaee | 9/10 | 5382 days | 27% |
| Belinda Godhard | 2/10 | 5382 days | 11% |
| Uwe Rieper | 10/10 | 5384 days | 27% |
| E.M. Prideaux | 10/10 | 5399 days | 27% |
| Elizabeth E | 8/10 | 5401 days | 27% |
| Stevens Frans | 8/10 | 5402 days | 27% |
| Heinrich Hax | 9/10 | 5405 days | 27% |
| tanh | 7/10 | 5432 days | 25% |
| Stephanie Steiner | 8/10 | 5451 days | 27% |
| Julia May | 9/10 | 5458 days | 27% |
| X Neils | 7/10 | 5469 days | 25% |
| Sarah Smith | 5/10 | 5473 days | 20% |
| Anna | 6/10 | 5477 days | 23% |
| OliverG1 | 7/10 | 5679 days | 25% |
| Philipp | 5/10 | 5691 days | 20% |
| JasminA | 5/10 | 5691 days | 20% |
| ChristinaV | 8/10 | 5701 days | 27% |
| JuergenSchnitzer | 9/10 | 5707 days | 27% |
| AstridVG | 7/10 | 5708 days | 25% |
| NatasjaV | 7/10 | 5709 days | 25% |
| JimmyK | 7/10 | 5709 days | 25% |
| MarcoJ | 9/10 | 5711 days | 27% |
| LucyPoland | 9/10 | 5712 days | 27% |
| Stolz | 7/10 | 5715 days | 25% |
| BrzezinskaM | 10/10 | 5716 days | 27% |
| AndreB | 10/10 | 5716 days | 27% |
| Linda | 7/10 | 5723 days | 25% |
| Susan | 8/10 | 5724 days | 27% |
| Byleveld | 7/10 | 5724 days | 25% |
| JoseB | 8/10 | 5725 days | 27% |
| JetteG | 10/10 | 5725 days | 27% |
| CarolF | 7/10 | 5726 days | 25% |
| Rachel | 9/10 | 5741 days | 27% |
| Claire | 7/10 | 5741 days | 25% |
| Denise | 8/10 | 5742 days | 27% |
| Denk | 8/10 | 5753 days | 27% |
| Klalis | 10/10 | 5756 days | 27% |
| Thomas | 4/10 | 5759 days | 17% |
| Mike | 5/10 | 5760 days | 20% |
| Debbie Mossman | 9/10 | 5766 days | 27% |
| Johann | 10/10 | 5768 days | 27% |
| Carina | 10/10 | 5770 days | 27% |
| Mat | 8/10 | 5808 days | 27% |
| Anette | 7/10 | 5811 days | 25% |
| midlands_missus | 8/10 | 5813 days | 27% |
| David | 7/10 | 5869 days | 25% |
| Suyin | 10/10 | 5889 days | 27% |
| Franz | 10/10 | 6062 days | 27% |
| Jennifer Baulch | 7/10 | 6067 days | 25% |
| George Jeffs | 10/10 | 6070 days | 27% |
| Jacob | 9/10 | 6074 days | 27% |
| Aharon | 10/10 | 6089 days | 27% |
| D.A. Mulder | 8/10 | 6090 days | 27% |
| Knol | 8/10 | 6092 days | 27% |
| Cole Penelope | 8/10 | 6095 days | 27% |
| Jody | 7/10 | 6103 days | 25% |
| Anna | 5/10 | 6103 days | 20% |
| Pauline Thai | 8/10 | 6110 days | 27% |
| Dan Adamson | 8/10 | 6110 days | 27% |
| Stephen Brightman | 8/10 | 6119 days | 27% |
| Madeleine Rowland | 8/10 | 6119 days | 27% |
| Bronwyn Gaby | 9/10 | 6137 days | 27% |
| Free_ride | 9/10 | 6153 days | 27% |
| Michael | 9/10 | 6176 days | 27% |
| Raul | 10/10 | 6426 days | 27% |
| TeamFlorida | 9/10 | 6428 days | 27% |
| TeamFlorida | 8/10 | 6428 days | 27% |
| James | 9/10 | 6441 days | 27% |
| Rudi | 10/10 | 6445 days | 27% |
| Rolf Kruger | 10/10 | 6469 days | 27% |
| Brian | 10/10 | 6473 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
-3.84% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 51 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 | -3.78% |
| 198 | -3.80% |
| 199 | -3.82% |
| 200 | -3.84% |
| 201 | -3.86% |
| 202 | -3.88% |
| 203 | -3.90% |
| … | … |
Balancing Adjustment
3.10% 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.