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
83.67%
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 | 2953 days | 100% |
| Dan Coates | 9/10 | 3186 days | 83% |
| Dominik | 9/10 | 3186 days | 83% |
| Holloway | 10/10 | 3209 days | 82% |
| Christina | 6/10 | 3277 days | 66% |
| Barbara Knops | 9/10 | 3279 days | 77% |
| Manu Liberta | 10/10 | 3289 days | 77% |
| Bruno | 9/10 | 3299 days | 75% |
| Kirsty Smith | 10/10 | 3322 days | 74% |
| Sophia Satter | 8/10 | 3333 days | 72% |
| Afiya Levy | 10/10 | 3554 days | 57% |
| Johannes Eisel | 6/10 | 3563 days | 49% |
| Alexander Mattea | 5/10 | 3563 days | 43% |
| Timea Bagosi | 9/10 | 3566 days | 56% |
| Riviere | 8/10 | 3577 days | 55% |
| Dani | 8/10 | 3579 days | 54% |
| Benoit Leclerc | 7/10 | 3581 days | 51% |
| Anna Stoehr | 10/10 | 3599 days | 54% |
| Kai Krchmar | 6/10 | 3652 days | 43% |
| Kristina Farkas | 5/10 | 3947 days | 22% |
| Sophia Kadel | 10/10 | 3977 days | 27% |
| Laura and Marie | 7/10 | 3983 days | 24% |
| Rachel S | 10/10 | 3991 days | 26% |
| Joris Giullemot | 8/10 | 4299 days | 3% |
| Laura Metz | 7/10 | 4310 days | 2% |
| Hubertus Thost | 7/10 | 4310 days | 2% |
| Amanda | 4/10 | 4325 days | 0% |
| S B | 10/10 | 4338 days | 1% |
| M K | 10/10 | 4338 days | 1% |
| Maya Bakker-deDreu | 8/10 | 4346 days | 0% |
| Christin Woelk | 9/10 | 4626 days | 34% |
| Maria Klister | 7/10 | 4646 days | 32% |
| Lydia Kleinkoenen | 9/10 | 4666 days | 34% |
| Jessica Grewe | 9/10 | 4666 days | 34% |
| Hannah Lia-Isis Kubillus | 9/10 | 4666 days | 34% |
| Jan Zimmerman | 8/10 | 4677 days | 34% |
| Margaret and Derek McNeil | 10/10 | 4737 days | 35% |
| Frank and Suzanne | 8/10 | 4752 days | 34% |
| RollingMoon | 8/10 | 4813 days | 34% |
| Marcel & Kim Meichtry | 7/10 | 5033 days | 32% |
| Howell Davies | 5/10 | 5036 days | 26% |
| Baas | 7/10 | 5036 days | 32% |
| Pete & Pat Etheridge | 8/10 | 5036 days | 34% |
| Siegfried Richter | 7/10 | 5037 days | 32% |
| Melanie Mathiak | 10/10 | 5039 days | 35% |
| Sig Schrattner | 8/10 | 5039 days | 34% |
| Rebecca Doehl | 7/10 | 5040 days | 32% |
| Seth & Carla | 7/10 | 5041 days | 32% |
| Gabriele Wendt | 9/10 | 5041 days | 34% |
| Tadej Ferjan | 8/10 | 5041 days | 34% |
| Mary Mitchell | 10/10 | 5041 days | 35% |
| Emily Wikston | 9/10 | 5042 days | 34% |
| Andreas & Leonie Fehr | 10/10 | 5048 days | 35% |
| Horst Langstein | 9/10 | 5049 days | 34% |
| Marco Scheiber | 9/10 | 5050 days | 34% |
| Friedrich Kaltner | 10/10 | 5052 days | 35% |
| Frank & Julia | 10/10 | 5055 days | 35% |
| Thyg Lingdal | 10/10 | 5055 days | 35% |
| Nicole van Bergen | 8/10 | 5055 days | 34% |
| Mike & April Prince | 7/10 | 5069 days | 32% |
| Alfred & Henrike | 8/10 | 5081 days | 34% |
| Lyn Stainton | 6/10 | 5130 days | 29% |
| Ken Talan | 10/10 | 5358 days | 35% |
| Jon_and_Family | 9/10 | 5362 days | 34% |
| Gertz | 10/10 | 5366 days | 35% |
| Katarina Bokor | 8/10 | 5370 days | 34% |
| Mark Franklin | 6/10 | 5370 days | 29% |
| Gordon Agent | 10/10 | 5370 days | 35% |
| Maureen Hardy | 8/10 | 5370 days | 34% |
| AJ van Pelt | 8/10 | 5370 days | 34% |
| Werner and Rita | 9/10 | 5377 days | 34% |
| Richard Dudfield | 10/10 | 5379 days | 35% |
| Sayaka | 7/10 | 5379 days | 32% |
| Urs and Isabella | 7/10 | 5380 days | 32% |
| Juliane Kleiu | 10/10 | 5383 days | 35% |
| Linda Kremer | 9/10 | 5384 days | 34% |
| Rebecca Johnston | 9/10 | 5384 days | 34% |
| David Mellard | 10/10 | 5385 days | 35% |
| Bruce & Elaine Chote | 10/10 | 5385 days | 35% |
| Paul Nickson | 8/10 | 5385 days | 34% |
| Monique | 8/10 | 5385 days | 34% |
| Beat & Connie | 10/10 | 5387 days | 35% |
| Alex Stil | 9/10 | 5387 days | 34% |
| Pein van Nosrt | 7/10 | 5392 days | 32% |
| Raith | 9/10 | 5392 days | 34% |
| Elise van Haastert | 8/10 | 5392 days | 34% |
| Claudia | 10/10 | 5394 days | 35% |
| Carolin Ranner | 6/10 | 5394 days | 29% |
| Winskowsky | 9/10 | 5395 days | 34% |
| Hvid | 9/10 | 5409 days | 34% |
| Judith K. | 6/10 | 5411 days | 29% |
| Ruben and Jetske | 7/10 | 5411 days | 32% |
| Roy Seymour | 9/10 | 5412 days | 34% |
| Tom Hill | 10/10 | 5416 days | 35% |
| Ruua Reyrink | 7/10 | 5417 days | 32% |
| Patrick Hugener | 9/10 | 5417 days | 34% |
| JohnHaestad | 4/10 | 5421 days | 22% |
| dollimyxture | 10/10 | 5452 days | 35% |
| aggiemary04 | 10/10 | 5544 days | 35% |
| victoriauk | 4/10 | 5666 days | 22% |
| Baumgarten | 8/10 | 5694 days | 34% |
| travelbunnyadventures | 8/10 | 5697 days | 34% |
| Don & Geraldine | 10/10 | 5733 days | 35% |
| Matthias & Ceristiane | 8/10 | 5745 days | 34% |
| Hilary and Chris Ayton | 9/10 | 5746 days | 34% |
| Lis & Rob Tate | 9/10 | 5748 days | 34% |
| ccthornton100 | 10/10 | 5758 days | 35% |
| Bob Kusesia | 10/10 | 5759 days | 35% |
| Yssel de Schepper | 7/10 | 5764 days | 32% |
| Janny Meerdinnk Veldboow | 7/10 | 5764 days | 32% |
| Arie Ascher | 9/10 | 5765 days | 34% |
| Wolfgang Engelke | 10/10 | 5767 days | 35% |
| Thomas K | 9/10 | 5767 days | 34% |
| Loleit | 7/10 | 5779 days | 32% |
| Mattias Thorm | 9/10 | 5780 days | 34% |
| Vincente Garrido | 4/10 | 5781 days | 22% |
| R Gilge | 10/10 | 5782 days | 35% |
| Erik Hummelmose | 8/10 | 5782 days | 34% |
| Ian E | 6/10 | 5782 days | 29% |
| Nadine Schaee | 9/10 | 5783 days | 34% |
| Belinda Godhard | 2/10 | 5783 days | 14% |
| Uwe Rieper | 10/10 | 5785 days | 35% |
| E.M. Prideaux | 10/10 | 5800 days | 35% |
| Elizabeth E | 8/10 | 5802 days | 34% |
| Stevens Frans | 8/10 | 5803 days | 34% |
| Heinrich Hax | 9/10 | 5806 days | 34% |
| tanh | 7/10 | 5833 days | 32% |
| Stephanie Steiner | 8/10 | 5852 days | 34% |
| Julia May | 9/10 | 5859 days | 34% |
| X Neils | 7/10 | 5870 days | 32% |
| Sarah Smith | 5/10 | 5874 days | 26% |
| Anna | 6/10 | 5878 days | 29% |
| OliverG1 | 7/10 | 6080 days | 32% |
| Philipp | 5/10 | 6092 days | 26% |
| JasminA | 5/10 | 6092 days | 26% |
| ChristinaV | 8/10 | 6102 days | 34% |
| JuergenSchnitzer | 9/10 | 6108 days | 34% |
| AstridVG | 7/10 | 6108 days | 32% |
| NatasjaV | 7/10 | 6110 days | 32% |
| JimmyK | 7/10 | 6110 days | 32% |
| MarcoJ | 9/10 | 6112 days | 34% |
| LucyPoland | 9/10 | 6113 days | 34% |
| Stolz | 7/10 | 6116 days | 32% |
| BrzezinskaM | 10/10 | 6117 days | 35% |
| AndreB | 10/10 | 6117 days | 35% |
| Linda | 7/10 | 6124 days | 32% |
| Susan | 8/10 | 6124 days | 34% |
| Byleveld | 7/10 | 6125 days | 32% |
| JoseB | 8/10 | 6126 days | 34% |
| JetteG | 10/10 | 6126 days | 35% |
| CarolF | 7/10 | 6127 days | 32% |
| Rachel | 9/10 | 6141 days | 34% |
| Claire | 7/10 | 6141 days | 32% |
| Denise | 8/10 | 6143 days | 34% |
| Denk | 8/10 | 6154 days | 34% |
| Klalis | 10/10 | 6157 days | 35% |
| Thomas | 4/10 | 6160 days | 22% |
| Mike | 5/10 | 6161 days | 26% |
| Debbie Mossman | 9/10 | 6167 days | 34% |
| Johann | 10/10 | 6169 days | 35% |
| Carina | 10/10 | 6171 days | 35% |
| Mat | 8/10 | 6209 days | 34% |
| Anette | 7/10 | 6211 days | 32% |
| midlands_missus | 8/10 | 6214 days | 34% |
| David | 7/10 | 6270 days | 32% |
| Suyin | 10/10 | 6290 days | 35% |
| Franz | 10/10 | 6463 days | 35% |
| Jennifer Baulch | 7/10 | 6468 days | 32% |
| George Jeffs | 10/10 | 6471 days | 35% |
| Jacob | 9/10 | 6475 days | 34% |
| Aharon | 10/10 | 6490 days | 35% |
| D.A. Mulder | 8/10 | 6491 days | 34% |
| Knol | 8/10 | 6493 days | 34% |
| Cole Penelope | 8/10 | 6496 days | 34% |
| Jody | 7/10 | 6504 days | 32% |
| Anna | 5/10 | 6504 days | 26% |
| Pauline Thai | 8/10 | 6511 days | 34% |
| Dan Adamson | 8/10 | 6511 days | 34% |
| Stephen Brightman | 8/10 | 6520 days | 34% |
| Madeleine Rowland | 8/10 | 6520 days | 34% |
| Bronwyn Gaby | 9/10 | 6538 days | 34% |
| Free_ride | 9/10 | 6554 days | 34% |
| Michael | 9/10 | 6577 days | 34% |
| Raul | 10/10 | 6827 days | 35% |
| TeamFlorida | 9/10 | 6829 days | 34% |
| TeamFlorida | 8/10 | 6829 days | 34% |
| James | 9/10 | 6842 days | 34% |
| Rudi | 10/10 | 6846 days | 35% |
| Rolf Kruger | 10/10 | 6870 days | 35% |
| Brian | 10/10 | 6874 days | 35% |
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
-4.07% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 42 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 | -4.01% |
| 198 | -4.03% |
| 199 | -4.05% |
| 200 | -4.07% |
| 201 | -4.09% |
| 202 | -4.11% |
| 203 | -4.13% |
| … | … |
Balancing Adjustment
3.11% 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.