Kia ora, 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
83.55%
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 | 2645 days | 100% |
| Dan Coates | 9/10 | 2878 days | 86% |
| Dominik | 9/10 | 2878 days | 86% |
| Holloway | 10/10 | 2901 days | 86% |
| Christina | 6/10 | 2969 days | 71% |
| Barbara Knops | 9/10 | 2971 days | 81% |
| Manu Liberta | 10/10 | 2981 days | 81% |
| Bruno | 9/10 | 2991 days | 80% |
| Kirsty Smith | 10/10 | 3014 days | 79% |
| Sophia Satter | 8/10 | 3025 days | 77% |
| Afiya Levy | 10/10 | 3246 days | 66% |
| Johannes Eisel | 6/10 | 3255 days | 56% |
| Alexander Mattea | 5/10 | 3255 days | 50% |
| Timea Bagosi | 9/10 | 3257 days | 65% |
| Riviere | 8/10 | 3269 days | 63% |
| Dani | 8/10 | 3271 days | 63% |
| Benoit Leclerc | 7/10 | 3273 days | 60% |
| Anna Stoehr | 10/10 | 3291 days | 63% |
| Kai Krchmar | 6/10 | 3344 days | 52% |
| Kristina Farkas | 5/10 | 3639 days | 32% |
| Sophia Kadel | 10/10 | 3669 days | 41% |
| Laura and Marie | 7/10 | 3675 days | 38% |
| Rachel S | 10/10 | 3682 days | 40% |
| Joris Giullemot | 8/10 | 3991 days | 22% |
| Laura Metz | 7/10 | 4002 days | 20% |
| Hubertus Thost | 7/10 | 4002 days | 20% |
| Amanda | 4/10 | 4017 days | 13% |
| S B | 10/10 | 4030 days | 20% |
| M K | 10/10 | 4030 days | 20% |
| Maya Bakker-deDreu | 8/10 | 4038 days | 19% |
| Christin Woelk | 9/10 | 4318 days | 3% |
| Maria Klister | 7/10 | 4338 days | 2% |
| Lydia Kleinkoenen | 9/10 | 4358 days | 1% |
| Jessica Grewe | 9/10 | 4358 days | 1% |
| Hannah Lia-Isis Kubillus | 9/10 | 4358 days | 1% |
| Jan Zimmerman | 8/10 | 4369 days | 0% |
| Margaret and Derek McNeil | 10/10 | 4429 days | 29% |
| Frank and Suzanne | 8/10 | 4444 days | 29% |
| RollingMoon | 8/10 | 4505 days | 29% |
| Marcel & Kim Meichtry | 7/10 | 4725 days | 27% |
| Howell Davies | 5/10 | 4728 days | 22% |
| Baas | 7/10 | 4728 days | 27% |
| Pete & Pat Etheridge | 8/10 | 4728 days | 29% |
| Siegfried Richter | 7/10 | 4729 days | 27% |
| Melanie Mathiak | 10/10 | 4731 days | 29% |
| Sig Schrattner | 8/10 | 4731 days | 29% |
| Rebecca Doehl | 7/10 | 4732 days | 27% |
| Seth & Carla | 7/10 | 4733 days | 27% |
| Gabriele Wendt | 9/10 | 4733 days | 29% |
| Tadej Ferjan | 8/10 | 4733 days | 29% |
| Mary Mitchell | 10/10 | 4733 days | 29% |
| Emily Wikston | 9/10 | 4734 days | 29% |
| Andreas & Leonie Fehr | 10/10 | 4740 days | 29% |
| Horst Langstein | 9/10 | 4741 days | 29% |
| Marco Scheiber | 9/10 | 4742 days | 29% |
| Friedrich Kaltner | 10/10 | 4744 days | 29% |
| Frank & Julia | 10/10 | 4747 days | 29% |
| Thyg Lingdal | 10/10 | 4747 days | 29% |
| Nicole van Bergen | 8/10 | 4747 days | 29% |
| Mike & April Prince | 7/10 | 4761 days | 27% |
| Alfred & Henrike | 8/10 | 4773 days | 29% |
| Lyn Stainton | 6/10 | 4822 days | 25% |
| Ken Talan | 10/10 | 5050 days | 29% |
| Jon_and_Family | 9/10 | 5054 days | 29% |
| Gertz | 10/10 | 5058 days | 29% |
| Katarina Bokor | 8/10 | 5062 days | 29% |
| Mark Franklin | 6/10 | 5062 days | 25% |
| Gordon Agent | 10/10 | 5062 days | 29% |
| Maureen Hardy | 8/10 | 5062 days | 29% |
| AJ van Pelt | 8/10 | 5062 days | 29% |
| Werner and Rita | 9/10 | 5069 days | 29% |
| Richard Dudfield | 10/10 | 5071 days | 29% |
| Sayaka | 7/10 | 5071 days | 27% |
| Urs and Isabella | 7/10 | 5072 days | 27% |
| Juliane Kleiu | 10/10 | 5075 days | 29% |
| Linda Kremer | 9/10 | 5076 days | 29% |
| Rebecca Johnston | 9/10 | 5076 days | 29% |
| David Mellard | 10/10 | 5077 days | 29% |
| Bruce & Elaine Chote | 10/10 | 5077 days | 29% |
| Paul Nickson | 8/10 | 5077 days | 29% |
| Monique | 8/10 | 5077 days | 29% |
| Beat & Connie | 10/10 | 5079 days | 29% |
| Alex Stil | 9/10 | 5079 days | 29% |
| Pein van Nosrt | 7/10 | 5084 days | 27% |
| Raith | 9/10 | 5084 days | 29% |
| Elise van Haastert | 8/10 | 5084 days | 29% |
| Claudia | 10/10 | 5086 days | 29% |
| Carolin Ranner | 6/10 | 5086 days | 25% |
| Winskowsky | 9/10 | 5087 days | 29% |
| Hvid | 9/10 | 5101 days | 29% |
| Judith K. | 6/10 | 5103 days | 25% |
| Ruben and Jetske | 7/10 | 5103 days | 27% |
| Roy Seymour | 9/10 | 5104 days | 29% |
| Tom Hill | 10/10 | 5108 days | 29% |
| Ruua Reyrink | 7/10 | 5109 days | 27% |
| Patrick Hugener | 9/10 | 5109 days | 29% |
| JohnHaestad | 4/10 | 5113 days | 19% |
| dollimyxture | 10/10 | 5144 days | 29% |
| aggiemary04 | 10/10 | 5236 days | 29% |
| victoriauk | 4/10 | 5358 days | 19% |
| Baumgarten | 8/10 | 5386 days | 29% |
| travelbunnyadventures | 8/10 | 5389 days | 29% |
| Don & Geraldine | 10/10 | 5425 days | 29% |
| Matthias & Ceristiane | 8/10 | 5437 days | 29% |
| Hilary and Chris Ayton | 9/10 | 5438 days | 29% |
| Lis & Rob Tate | 9/10 | 5440 days | 29% |
| ccthornton100 | 10/10 | 5450 days | 29% |
| Bob Kusesia | 10/10 | 5451 days | 29% |
| Yssel de Schepper | 7/10 | 5456 days | 27% |
| Janny Meerdinnk Veldboow | 7/10 | 5456 days | 27% |
| Arie Ascher | 9/10 | 5457 days | 29% |
| Wolfgang Engelke | 10/10 | 5459 days | 29% |
| Thomas K | 9/10 | 5459 days | 29% |
| Loleit | 7/10 | 5471 days | 27% |
| Mattias Thorm | 9/10 | 5472 days | 29% |
| Vincente Garrido | 4/10 | 5473 days | 19% |
| R Gilge | 10/10 | 5474 days | 29% |
| Erik Hummelmose | 8/10 | 5474 days | 29% |
| Ian E | 6/10 | 5474 days | 25% |
| Nadine Schaee | 9/10 | 5475 days | 29% |
| Belinda Godhard | 2/10 | 5475 days | 13% |
| Uwe Rieper | 10/10 | 5477 days | 29% |
| E.M. Prideaux | 10/10 | 5492 days | 29% |
| Elizabeth E | 8/10 | 5494 days | 29% |
| Stevens Frans | 8/10 | 5495 days | 29% |
| Heinrich Hax | 9/10 | 5498 days | 29% |
| tanh | 7/10 | 5525 days | 27% |
| Stephanie Steiner | 8/10 | 5544 days | 29% |
| Julia May | 9/10 | 5551 days | 29% |
| X Neils | 7/10 | 5562 days | 27% |
| Sarah Smith | 5/10 | 5566 days | 22% |
| Anna | 6/10 | 5570 days | 25% |
| OliverG1 | 7/10 | 5772 days | 27% |
| Philipp | 5/10 | 5784 days | 22% |
| JasminA | 5/10 | 5784 days | 22% |
| ChristinaV | 8/10 | 5793 days | 29% |
| JuergenSchnitzer | 9/10 | 5800 days | 29% |
| AstridVG | 7/10 | 5800 days | 27% |
| NatasjaV | 7/10 | 5802 days | 27% |
| JimmyK | 7/10 | 5802 days | 27% |
| MarcoJ | 9/10 | 5804 days | 29% |
| LucyPoland | 9/10 | 5805 days | 29% |
| Stolz | 7/10 | 5807 days | 27% |
| BrzezinskaM | 10/10 | 5809 days | 29% |
| AndreB | 10/10 | 5809 days | 29% |
| Linda | 7/10 | 5815 days | 27% |
| Susan | 8/10 | 5816 days | 29% |
| Byleveld | 7/10 | 5817 days | 27% |
| JoseB | 8/10 | 5818 days | 29% |
| JetteG | 10/10 | 5818 days | 29% |
| CarolF | 7/10 | 5819 days | 27% |
| Rachel | 9/10 | 5833 days | 29% |
| Claire | 7/10 | 5833 days | 27% |
| Denise | 8/10 | 5834 days | 29% |
| Denk | 8/10 | 5846 days | 29% |
| Klalis | 10/10 | 5848 days | 29% |
| Thomas | 4/10 | 5852 days | 19% |
| Mike | 5/10 | 5853 days | 22% |
| Debbie Mossman | 9/10 | 5859 days | 29% |
| Johann | 10/10 | 5860 days | 29% |
| Carina | 10/10 | 5862 days | 29% |
| Mat | 8/10 | 5901 days | 29% |
| Anette | 7/10 | 5903 days | 27% |
| midlands_missus | 8/10 | 5906 days | 29% |
| David | 7/10 | 5961 days | 27% |
| Suyin | 10/10 | 5981 days | 29% |
| Franz | 10/10 | 6155 days | 29% |
| Jennifer Baulch | 7/10 | 6160 days | 27% |
| George Jeffs | 10/10 | 6163 days | 29% |
| Jacob | 9/10 | 6167 days | 29% |
| Aharon | 10/10 | 6182 days | 29% |
| D.A. Mulder | 8/10 | 6183 days | 29% |
| Knol | 8/10 | 6185 days | 29% |
| Cole Penelope | 8/10 | 6188 days | 29% |
| Jody | 7/10 | 6196 days | 27% |
| Anna | 5/10 | 6196 days | 22% |
| Pauline Thai | 8/10 | 6203 days | 29% |
| Dan Adamson | 8/10 | 6203 days | 29% |
| Stephen Brightman | 8/10 | 6212 days | 29% |
| Madeleine Rowland | 8/10 | 6212 days | 29% |
| Bronwyn Gaby | 9/10 | 6230 days | 29% |
| Free_ride | 9/10 | 6246 days | 29% |
| Michael | 9/10 | 6269 days | 29% |
| Raul | 10/10 | 6519 days | 29% |
| TeamFlorida | 9/10 | 6521 days | 29% |
| TeamFlorida | 8/10 | 6521 days | 29% |
| James | 9/10 | 6534 days | 29% |
| Rudi | 10/10 | 6538 days | 29% |
| Rolf Kruger | 10/10 | 6562 days | 29% |
| Brian | 10/10 | 6566 days | 29% |
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
-4.14% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 49 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 | -4.08% |
| 198 | -4.10% |
| 199 | -4.12% |
| 200 | -4.14% |
| 201 | -4.16% |
| 202 | -4.18% |
| 203 | -4.20% |
| … | … |
Balancing Adjustment
3.17% 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.