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.
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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
83.61%
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 | 2709 days | 100% |
| Dan Coates | 9/10 | 2942 days | 84% |
| Dominik | 9/10 | 2942 days | 84% |
| Holloway | 10/10 | 2965 days | 84% |
| Christina | 6/10 | 3033 days | 66% |
| Barbara Knops | 9/10 | 3035 days | 78% |
| Manu Liberta | 10/10 | 3045 days | 78% |
| Bruno | 9/10 | 3055 days | 77% |
| Kirsty Smith | 10/10 | 3078 days | 76% |
| Sophia Satter | 8/10 | 3089 days | 73% |
| Afiya Levy | 10/10 | 3310 days | 60% |
| Johannes Eisel | 6/10 | 3319 days | 49% |
| Alexander Mattea | 5/10 | 3319 days | 42% |
| Timea Bagosi | 9/10 | 3321 days | 58% |
| Riviere | 8/10 | 3333 days | 57% |
| Dani | 8/10 | 3335 days | 57% |
| Benoit Leclerc | 7/10 | 3337 days | 53% |
| Anna Stoehr | 10/10 | 3355 days | 57% |
| Kai Krchmar | 6/10 | 3408 days | 44% |
| Kristina Farkas | 5/10 | 3703 days | 22% |
| Sophia Kadel | 10/10 | 3733 days | 31% |
| Laura and Marie | 7/10 | 3739 days | 27% |
| Rachel S | 10/10 | 3746 days | 30% |
| Joris Giullemot | 8/10 | 4055 days | 8% |
| Laura Metz | 7/10 | 4066 days | 7% |
| Hubertus Thost | 7/10 | 4066 days | 7% |
| Amanda | 4/10 | 4081 days | 0% |
| S B | 10/10 | 4094 days | 6% |
| M K | 10/10 | 4094 days | 6% |
| Maya Bakker-deDreu | 8/10 | 4102 days | 5% |
| Christin Woelk | 9/10 | 4382 days | 21% |
| Maria Klister | 7/10 | 4402 days | 19% |
| Lydia Kleinkoenen | 9/10 | 4422 days | 21% |
| Jessica Grewe | 9/10 | 4422 days | 21% |
| Hannah Lia-Isis Kubillus | 9/10 | 4422 days | 21% |
| Jan Zimmerman | 8/10 | 4433 days | 21% |
| Margaret and Derek McNeil | 10/10 | 4493 days | 22% |
| Frank and Suzanne | 8/10 | 4508 days | 21% |
| RollingMoon | 8/10 | 4569 days | 21% |
| Marcel & Kim Meichtry | 7/10 | 4789 days | 19% |
| Howell Davies | 5/10 | 4792 days | 13% |
| Baas | 7/10 | 4792 days | 19% |
| Pete & Pat Etheridge | 8/10 | 4792 days | 21% |
| Siegfried Richter | 7/10 | 4793 days | 19% |
| Melanie Mathiak | 10/10 | 4795 days | 22% |
| Sig Schrattner | 8/10 | 4795 days | 21% |
| Rebecca Doehl | 7/10 | 4796 days | 19% |
| Seth & Carla | 7/10 | 4797 days | 19% |
| Gabriele Wendt | 9/10 | 4797 days | 21% |
| Tadej Ferjan | 8/10 | 4797 days | 21% |
| Mary Mitchell | 10/10 | 4797 days | 22% |
| Emily Wikston | 9/10 | 4798 days | 21% |
| Andreas & Leonie Fehr | 10/10 | 4804 days | 22% |
| Horst Langstein | 9/10 | 4805 days | 21% |
| Marco Scheiber | 9/10 | 4806 days | 21% |
| Friedrich Kaltner | 10/10 | 4808 days | 22% |
| Frank & Julia | 10/10 | 4811 days | 22% |
| Thyg Lingdal | 10/10 | 4811 days | 22% |
| Nicole van Bergen | 8/10 | 4811 days | 21% |
| Mike & April Prince | 7/10 | 4825 days | 19% |
| Alfred & Henrike | 8/10 | 4837 days | 21% |
| Lyn Stainton | 6/10 | 4886 days | 17% |
| Ken Talan | 10/10 | 5114 days | 22% |
| Jon_and_Family | 9/10 | 5118 days | 21% |
| Gertz | 10/10 | 5122 days | 22% |
| Katarina Bokor | 8/10 | 5126 days | 21% |
| Mark Franklin | 6/10 | 5126 days | 17% |
| Gordon Agent | 10/10 | 5126 days | 22% |
| Maureen Hardy | 8/10 | 5126 days | 21% |
| AJ van Pelt | 8/10 | 5126 days | 21% |
| Werner and Rita | 9/10 | 5133 days | 21% |
| Richard Dudfield | 10/10 | 5135 days | 22% |
| Sayaka | 7/10 | 5135 days | 19% |
| Urs and Isabella | 7/10 | 5136 days | 19% |
| Juliane Kleiu | 10/10 | 5139 days | 22% |
| Linda Kremer | 9/10 | 5140 days | 21% |
| Rebecca Johnston | 9/10 | 5140 days | 21% |
| David Mellard | 10/10 | 5141 days | 22% |
| Bruce & Elaine Chote | 10/10 | 5141 days | 22% |
| Paul Nickson | 8/10 | 5141 days | 21% |
| Monique | 8/10 | 5141 days | 21% |
| Beat & Connie | 10/10 | 5143 days | 22% |
| Alex Stil | 9/10 | 5143 days | 21% |
| Pein van Nosrt | 7/10 | 5148 days | 19% |
| Raith | 9/10 | 5148 days | 21% |
| Elise van Haastert | 8/10 | 5148 days | 21% |
| Claudia | 10/10 | 5150 days | 22% |
| Carolin Ranner | 6/10 | 5150 days | 17% |
| Winskowsky | 9/10 | 5151 days | 21% |
| Hvid | 9/10 | 5165 days | 21% |
| Judith K. | 6/10 | 5167 days | 17% |
| Ruben and Jetske | 7/10 | 5167 days | 19% |
| Roy Seymour | 9/10 | 5168 days | 21% |
| Tom Hill | 10/10 | 5172 days | 22% |
| Ruua Reyrink | 7/10 | 5173 days | 19% |
| Patrick Hugener | 9/10 | 5173 days | 21% |
| JohnHaestad | 4/10 | 5177 days | 9% |
| dollimyxture | 10/10 | 5208 days | 22% |
| aggiemary04 | 10/10 | 5300 days | 22% |
| victoriauk | 4/10 | 5422 days | 9% |
| Baumgarten | 8/10 | 5450 days | 21% |
| travelbunnyadventures | 8/10 | 5453 days | 21% |
| Don & Geraldine | 10/10 | 5489 days | 22% |
| Matthias & Ceristiane | 8/10 | 5501 days | 21% |
| Hilary and Chris Ayton | 9/10 | 5502 days | 21% |
| Lis & Rob Tate | 9/10 | 5504 days | 21% |
| ccthornton100 | 10/10 | 5514 days | 22% |
| Bob Kusesia | 10/10 | 5515 days | 22% |
| Yssel de Schepper | 7/10 | 5520 days | 19% |
| Janny Meerdinnk Veldboow | 7/10 | 5520 days | 19% |
| Arie Ascher | 9/10 | 5521 days | 21% |
| Wolfgang Engelke | 10/10 | 5523 days | 22% |
| Thomas K | 9/10 | 5523 days | 21% |
| Loleit | 7/10 | 5535 days | 19% |
| Mattias Thorm | 9/10 | 5536 days | 21% |
| Vincente Garrido | 4/10 | 5537 days | 9% |
| R Gilge | 10/10 | 5538 days | 22% |
| Erik Hummelmose | 8/10 | 5538 days | 21% |
| Ian E | 6/10 | 5538 days | 17% |
| Nadine Schaee | 9/10 | 5539 days | 21% |
| Belinda Godhard | 2/10 | 5539 days | 3% |
| Uwe Rieper | 10/10 | 5541 days | 22% |
| E.M. Prideaux | 10/10 | 5556 days | 22% |
| Elizabeth E | 8/10 | 5558 days | 21% |
| Stevens Frans | 8/10 | 5559 days | 21% |
| Heinrich Hax | 9/10 | 5562 days | 21% |
| tanh | 7/10 | 5589 days | 19% |
| Stephanie Steiner | 8/10 | 5608 days | 21% |
| Julia May | 9/10 | 5615 days | 21% |
| X Neils | 7/10 | 5626 days | 19% |
| Sarah Smith | 5/10 | 5630 days | 13% |
| Anna | 6/10 | 5634 days | 17% |
| OliverG1 | 7/10 | 5836 days | 19% |
| Philipp | 5/10 | 5848 days | 13% |
| JasminA | 5/10 | 5848 days | 13% |
| ChristinaV | 8/10 | 5857 days | 21% |
| JuergenSchnitzer | 9/10 | 5864 days | 21% |
| AstridVG | 7/10 | 5864 days | 19% |
| NatasjaV | 7/10 | 5866 days | 19% |
| JimmyK | 7/10 | 5866 days | 19% |
| MarcoJ | 9/10 | 5868 days | 21% |
| LucyPoland | 9/10 | 5869 days | 21% |
| Stolz | 7/10 | 5871 days | 19% |
| BrzezinskaM | 10/10 | 5873 days | 22% |
| AndreB | 10/10 | 5873 days | 22% |
| Linda | 7/10 | 5879 days | 19% |
| Susan | 8/10 | 5880 days | 21% |
| Byleveld | 7/10 | 5881 days | 19% |
| JoseB | 8/10 | 5882 days | 21% |
| JetteG | 10/10 | 5882 days | 22% |
| CarolF | 7/10 | 5883 days | 19% |
| Rachel | 9/10 | 5897 days | 21% |
| Claire | 7/10 | 5897 days | 19% |
| Denise | 8/10 | 5898 days | 21% |
| Denk | 8/10 | 5910 days | 21% |
| Klalis | 10/10 | 5912 days | 22% |
| Thomas | 4/10 | 5916 days | 9% |
| Mike | 5/10 | 5917 days | 13% |
| Debbie Mossman | 9/10 | 5923 days | 21% |
| Johann | 10/10 | 5924 days | 22% |
| Carina | 10/10 | 5926 days | 22% |
| Mat | 8/10 | 5965 days | 21% |
| Anette | 7/10 | 5967 days | 19% |
| midlands_missus | 8/10 | 5970 days | 21% |
| David | 7/10 | 6025 days | 19% |
| Suyin | 10/10 | 6045 days | 22% |
| Franz | 10/10 | 6219 days | 22% |
| Jennifer Baulch | 7/10 | 6224 days | 19% |
| George Jeffs | 10/10 | 6227 days | 22% |
| Jacob | 9/10 | 6231 days | 21% |
| Aharon | 10/10 | 6246 days | 22% |
| D.A. Mulder | 8/10 | 6247 days | 21% |
| Knol | 8/10 | 6249 days | 21% |
| Cole Penelope | 8/10 | 6252 days | 21% |
| Jody | 7/10 | 6260 days | 19% |
| Anna | 5/10 | 6260 days | 13% |
| Pauline Thai | 8/10 | 6267 days | 21% |
| Dan Adamson | 8/10 | 6267 days | 21% |
| Stephen Brightman | 8/10 | 6276 days | 21% |
| Madeleine Rowland | 8/10 | 6276 days | 21% |
| Bronwyn Gaby | 9/10 | 6294 days | 21% |
| Free_ride | 9/10 | 6310 days | 21% |
| Michael | 9/10 | 6333 days | 21% |
| Raul | 10/10 | 6583 days | 22% |
| TeamFlorida | 9/10 | 6585 days | 21% |
| TeamFlorida | 8/10 | 6585 days | 21% |
| James | 9/10 | 6598 days | 21% |
| Rudi | 10/10 | 6602 days | 22% |
| Rolf Kruger | 10/10 | 6626 days | 22% |
| Brian | 10/10 | 6630 days | 22% |
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
-3.66% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 61 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 | -3.61% |
| 198 | -3.63% |
| 199 | -3.65% |
| 200 | -3.66% |
| 201 | -3.68% |
| 202 | -3.70% |
| 203 | -3.72% |
| … | … |
Balancing Adjustment
3.02% 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.