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
83.53%
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 | 3130 days | 100% |
| Dan Coates | 9/10 | 3363 days | 78% |
| Dominik | 9/10 | 3363 days | 78% |
| Holloway | 10/10 | 3386 days | 77% |
| Christina | 6/10 | 3454 days | 58% |
| Barbara Knops | 9/10 | 3456 days | 69% |
| Manu Liberta | 10/10 | 3466 days | 69% |
| Bruno | 9/10 | 3476 days | 67% |
| Kirsty Smith | 10/10 | 3499 days | 66% |
| Sophia Satter | 8/10 | 3510 days | 63% |
| Afiya Levy | 10/10 | 3731 days | 44% |
| Johannes Eisel | 6/10 | 3740 days | 34% |
| Alexander Mattea | 5/10 | 3740 days | 28% |
| Timea Bagosi | 9/10 | 3743 days | 42% |
| Riviere | 8/10 | 3754 days | 40% |
| Dani | 8/10 | 3756 days | 40% |
| Benoit Leclerc | 7/10 | 3758 days | 37% |
| Anna Stoehr | 10/10 | 3776 days | 39% |
| Kai Krchmar | 6/10 | 3829 days | 27% |
| Kristina Farkas | 5/10 | 4124 days | 0% |
| Sophia Kadel | 10/10 | 4154 days | 3% |
| Laura and Marie | 7/10 | 4160 days | 1% |
| Rachel S | 10/10 | 4168 days | 2% |
| Joris Giullemot | 8/10 | 4476 days | 29% |
| Laura Metz | 7/10 | 4487 days | 27% |
| Hubertus Thost | 7/10 | 4487 days | 27% |
| Amanda | 4/10 | 4502 days | 13% |
| S B | 10/10 | 4515 days | 30% |
| M K | 10/10 | 4515 days | 30% |
| Maya Bakker-deDreu | 8/10 | 4523 days | 29% |
| Christin Woelk | 9/10 | 4803 days | 30% |
| Maria Klister | 7/10 | 4823 days | 27% |
| Lydia Kleinkoenen | 9/10 | 4843 days | 30% |
| Jessica Grewe | 9/10 | 4843 days | 30% |
| Hannah Lia-Isis Kubillus | 9/10 | 4843 days | 30% |
| Jan Zimmerman | 8/10 | 4854 days | 29% |
| Margaret and Derek McNeil | 10/10 | 4914 days | 30% |
| Frank and Suzanne | 8/10 | 4929 days | 29% |
| RollingMoon | 8/10 | 4990 days | 29% |
| Marcel & Kim Meichtry | 7/10 | 5210 days | 27% |
| Howell Davies | 5/10 | 5213 days | 19% |
| Baas | 7/10 | 5213 days | 27% |
| Pete & Pat Etheridge | 8/10 | 5213 days | 29% |
| Siegfried Richter | 7/10 | 5214 days | 27% |
| Melanie Mathiak | 10/10 | 5216 days | 30% |
| Sig Schrattner | 8/10 | 5216 days | 29% |
| Rebecca Doehl | 7/10 | 5217 days | 27% |
| Seth & Carla | 7/10 | 5218 days | 27% |
| Gabriele Wendt | 9/10 | 5218 days | 30% |
| Tadej Ferjan | 8/10 | 5218 days | 29% |
| Mary Mitchell | 10/10 | 5218 days | 30% |
| Emily Wikston | 9/10 | 5219 days | 30% |
| Andreas & Leonie Fehr | 10/10 | 5225 days | 30% |
| Horst Langstein | 9/10 | 5226 days | 30% |
| Marco Scheiber | 9/10 | 5227 days | 30% |
| Friedrich Kaltner | 10/10 | 5229 days | 30% |
| Frank & Julia | 10/10 | 5232 days | 30% |
| Thyg Lingdal | 10/10 | 5232 days | 30% |
| Nicole van Bergen | 8/10 | 5232 days | 29% |
| Mike & April Prince | 7/10 | 5246 days | 27% |
| Alfred & Henrike | 8/10 | 5258 days | 29% |
| Lyn Stainton | 6/10 | 5307 days | 24% |
| Ken Talan | 10/10 | 5535 days | 30% |
| Jon_and_Family | 9/10 | 5539 days | 30% |
| Gertz | 10/10 | 5543 days | 30% |
| Katarina Bokor | 8/10 | 5547 days | 29% |
| Mark Franklin | 6/10 | 5547 days | 24% |
| Gordon Agent | 10/10 | 5547 days | 30% |
| Maureen Hardy | 8/10 | 5547 days | 29% |
| AJ van Pelt | 8/10 | 5547 days | 29% |
| Werner and Rita | 9/10 | 5554 days | 30% |
| Richard Dudfield | 10/10 | 5556 days | 30% |
| Sayaka | 7/10 | 5556 days | 27% |
| Urs and Isabella | 7/10 | 5557 days | 27% |
| Juliane Kleiu | 10/10 | 5560 days | 30% |
| Linda Kremer | 9/10 | 5561 days | 30% |
| Rebecca Johnston | 9/10 | 5561 days | 30% |
| David Mellard | 10/10 | 5562 days | 30% |
| Bruce & Elaine Chote | 10/10 | 5562 days | 30% |
| Paul Nickson | 8/10 | 5562 days | 29% |
| Monique | 8/10 | 5562 days | 29% |
| Beat & Connie | 10/10 | 5564 days | 30% |
| Alex Stil | 9/10 | 5564 days | 30% |
| Pein van Nosrt | 7/10 | 5569 days | 27% |
| Raith | 9/10 | 5569 days | 30% |
| Elise van Haastert | 8/10 | 5569 days | 29% |
| Claudia | 10/10 | 5571 days | 30% |
| Carolin Ranner | 6/10 | 5571 days | 24% |
| Winskowsky | 9/10 | 5572 days | 30% |
| Hvid | 9/10 | 5586 days | 30% |
| Judith K. | 6/10 | 5588 days | 24% |
| Ruben and Jetske | 7/10 | 5588 days | 27% |
| Roy Seymour | 9/10 | 5589 days | 30% |
| Tom Hill | 10/10 | 5593 days | 30% |
| Ruua Reyrink | 7/10 | 5594 days | 27% |
| Patrick Hugener | 9/10 | 5594 days | 30% |
| JohnHaestad | 4/10 | 5598 days | 13% |
| dollimyxture | 10/10 | 5629 days | 30% |
| aggiemary04 | 10/10 | 5721 days | 30% |
| victoriauk | 4/10 | 5843 days | 13% |
| Baumgarten | 8/10 | 5871 days | 29% |
| travelbunnyadventures | 8/10 | 5874 days | 29% |
| Don & Geraldine | 10/10 | 5910 days | 30% |
| Matthias & Ceristiane | 8/10 | 5922 days | 29% |
| Hilary and Chris Ayton | 9/10 | 5923 days | 30% |
| Lis & Rob Tate | 9/10 | 5925 days | 30% |
| ccthornton100 | 10/10 | 5935 days | 30% |
| Bob Kusesia | 10/10 | 5936 days | 30% |
| Yssel de Schepper | 7/10 | 5941 days | 27% |
| Janny Meerdinnk Veldboow | 7/10 | 5941 days | 27% |
| Arie Ascher | 9/10 | 5942 days | 30% |
| Wolfgang Engelke | 10/10 | 5944 days | 30% |
| Thomas K | 9/10 | 5944 days | 30% |
| Loleit | 7/10 | 5956 days | 27% |
| Mattias Thorm | 9/10 | 5957 days | 30% |
| Vincente Garrido | 4/10 | 5958 days | 13% |
| R Gilge | 10/10 | 5959 days | 30% |
| Erik Hummelmose | 8/10 | 5959 days | 29% |
| Ian E | 6/10 | 5959 days | 24% |
| Nadine Schaee | 9/10 | 5960 days | 30% |
| Belinda Godhard | 2/10 | 5960 days | 4% |
| Uwe Rieper | 10/10 | 5962 days | 30% |
| E.M. Prideaux | 10/10 | 5977 days | 30% |
| Elizabeth E | 8/10 | 5979 days | 29% |
| Stevens Frans | 8/10 | 5980 days | 29% |
| Heinrich Hax | 9/10 | 5983 days | 30% |
| tanh | 7/10 | 6010 days | 27% |
| Stephanie Steiner | 8/10 | 6029 days | 29% |
| Julia May | 9/10 | 6036 days | 30% |
| X Neils | 7/10 | 6047 days | 27% |
| Sarah Smith | 5/10 | 6051 days | 19% |
| Anna | 6/10 | 6055 days | 24% |
| OliverG1 | 7/10 | 6257 days | 27% |
| Philipp | 5/10 | 6269 days | 19% |
| JasminA | 5/10 | 6269 days | 19% |
| ChristinaV | 8/10 | 6279 days | 29% |
| JuergenSchnitzer | 9/10 | 6285 days | 30% |
| AstridVG | 7/10 | 6286 days | 27% |
| NatasjaV | 7/10 | 6287 days | 27% |
| JimmyK | 7/10 | 6287 days | 27% |
| MarcoJ | 9/10 | 6289 days | 30% |
| LucyPoland | 9/10 | 6290 days | 30% |
| Stolz | 7/10 | 6293 days | 27% |
| BrzezinskaM | 10/10 | 6294 days | 30% |
| AndreB | 10/10 | 6294 days | 30% |
| Linda | 7/10 | 6301 days | 27% |
| Susan | 8/10 | 6302 days | 29% |
| Byleveld | 7/10 | 6302 days | 27% |
| JoseB | 8/10 | 6303 days | 29% |
| JetteG | 10/10 | 6303 days | 30% |
| CarolF | 7/10 | 6304 days | 27% |
| Rachel | 9/10 | 6319 days | 30% |
| Claire | 7/10 | 6319 days | 27% |
| Denise | 8/10 | 6320 days | 29% |
| Denk | 8/10 | 6331 days | 29% |
| Klalis | 10/10 | 6334 days | 30% |
| Thomas | 4/10 | 6337 days | 13% |
| Mike | 5/10 | 6338 days | 19% |
| Debbie Mossman | 9/10 | 6344 days | 30% |
| Johann | 10/10 | 6346 days | 30% |
| Carina | 10/10 | 6348 days | 30% |
| Mat | 8/10 | 6386 days | 29% |
| Anette | 7/10 | 6389 days | 27% |
| midlands_missus | 8/10 | 6391 days | 29% |
| David | 7/10 | 6447 days | 27% |
| Suyin | 10/10 | 6467 days | 30% |
| Franz | 10/10 | 6640 days | 30% |
| Jennifer Baulch | 7/10 | 6645 days | 27% |
| George Jeffs | 10/10 | 6648 days | 30% |
| Jacob | 9/10 | 6652 days | 30% |
| Aharon | 10/10 | 6667 days | 30% |
| D.A. Mulder | 8/10 | 6668 days | 29% |
| Knol | 8/10 | 6670 days | 29% |
| Cole Penelope | 8/10 | 6673 days | 29% |
| Jody | 7/10 | 6681 days | 27% |
| Anna | 5/10 | 6681 days | 19% |
| Pauline Thai | 8/10 | 6688 days | 29% |
| Dan Adamson | 8/10 | 6688 days | 29% |
| Stephen Brightman | 8/10 | 6697 days | 29% |
| Madeleine Rowland | 8/10 | 6697 days | 29% |
| Bronwyn Gaby | 9/10 | 6715 days | 30% |
| Free_ride | 9/10 | 6731 days | 30% |
| Michael | 9/10 | 6754 days | 30% |
| Raul | 10/10 | 7004 days | 30% |
| TeamFlorida | 9/10 | 7006 days | 30% |
| TeamFlorida | 8/10 | 7006 days | 29% |
| James | 9/10 | 7019 days | 30% |
| Rudi | 10/10 | 7023 days | 30% |
| Rolf Kruger | 10/10 | 7047 days | 30% |
| Brian | 10/10 | 7051 days | 30% |
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
-2.47% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 105 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 | -2.43% |
| 198 | -2.45% |
| 199 | -2.46% |
| 200 | -2.47% |
| 201 | -2.48% |
| 202 | -2.50% |
| 203 | -2.51% |
| … | … |
Balancing Adjustment
2.72% 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
84%
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.