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 | 2966 days | 100% |
| Dan Coates | 9/10 | 3199 days | 83% |
| Dominik | 9/10 | 3199 days | 83% |
| Holloway | 10/10 | 3222 days | 82% |
| Christina | 6/10 | 3290 days | 67% |
| Barbara Knops | 9/10 | 3292 days | 77% |
| Manu Liberta | 10/10 | 3302 days | 77% |
| Bruno | 9/10 | 3312 days | 75% |
| Kirsty Smith | 10/10 | 3335 days | 74% |
| Sophia Satter | 8/10 | 3346 days | 72% |
| Afiya Levy | 10/10 | 3567 days | 57% |
| Johannes Eisel | 6/10 | 3576 days | 49% |
| Alexander Mattea | 5/10 | 3576 days | 43% |
| Timea Bagosi | 9/10 | 3578 days | 56% |
| Riviere | 8/10 | 3590 days | 55% |
| Dani | 8/10 | 3592 days | 55% |
| Benoit Leclerc | 7/10 | 3594 days | 52% |
| Anna Stoehr | 10/10 | 3612 days | 54% |
| Kai Krchmar | 6/10 | 3665 days | 43% |
| Kristina Farkas | 5/10 | 3960 days | 22% |
| Sophia Kadel | 10/10 | 3990 days | 27% |
| Laura and Marie | 7/10 | 3996 days | 24% |
| Rachel S | 10/10 | 4003 days | 26% |
| Joris Giullemot | 8/10 | 4312 days | 3% |
| Laura Metz | 7/10 | 4323 days | 2% |
| Hubertus Thost | 7/10 | 4323 days | 2% |
| Amanda | 4/10 | 4338 days | 0% |
| S B | 10/10 | 4351 days | 1% |
| M K | 10/10 | 4351 days | 1% |
| Maya Bakker-deDreu | 8/10 | 4359 days | 0% |
| Christin Woelk | 9/10 | 4639 days | 35% |
| Maria Klister | 7/10 | 4659 days | 33% |
| Lydia Kleinkoenen | 9/10 | 4679 days | 35% |
| Jessica Grewe | 9/10 | 4679 days | 35% |
| Hannah Lia-Isis Kubillus | 9/10 | 4679 days | 35% |
| Jan Zimmerman | 8/10 | 4690 days | 35% |
| Margaret and Derek McNeil | 10/10 | 4750 days | 36% |
| Frank and Suzanne | 8/10 | 4765 days | 35% |
| RollingMoon | 8/10 | 4826 days | 35% |
| Marcel & Kim Meichtry | 7/10 | 5046 days | 33% |
| Howell Davies | 5/10 | 5049 days | 27% |
| Baas | 7/10 | 5049 days | 33% |
| Pete & Pat Etheridge | 8/10 | 5049 days | 35% |
| Siegfried Richter | 7/10 | 5050 days | 33% |
| Melanie Mathiak | 10/10 | 5052 days | 36% |
| Sig Schrattner | 8/10 | 5052 days | 35% |
| Rebecca Doehl | 7/10 | 5053 days | 33% |
| Seth & Carla | 7/10 | 5054 days | 33% |
| Gabriele Wendt | 9/10 | 5054 days | 35% |
| Tadej Ferjan | 8/10 | 5054 days | 35% |
| Mary Mitchell | 10/10 | 5054 days | 36% |
| Emily Wikston | 9/10 | 5055 days | 35% |
| Andreas & Leonie Fehr | 10/10 | 5061 days | 36% |
| Horst Langstein | 9/10 | 5062 days | 35% |
| Marco Scheiber | 9/10 | 5063 days | 35% |
| Friedrich Kaltner | 10/10 | 5065 days | 36% |
| Frank & Julia | 10/10 | 5068 days | 36% |
| Thyg Lingdal | 10/10 | 5068 days | 36% |
| Nicole van Bergen | 8/10 | 5068 days | 35% |
| Mike & April Prince | 7/10 | 5082 days | 33% |
| Alfred & Henrike | 8/10 | 5094 days | 35% |
| Lyn Stainton | 6/10 | 5143 days | 30% |
| Ken Talan | 10/10 | 5371 days | 36% |
| Jon_and_Family | 9/10 | 5375 days | 35% |
| Gertz | 10/10 | 5379 days | 36% |
| Katarina Bokor | 8/10 | 5383 days | 35% |
| Mark Franklin | 6/10 | 5383 days | 30% |
| Gordon Agent | 10/10 | 5383 days | 36% |
| Maureen Hardy | 8/10 | 5383 days | 35% |
| AJ van Pelt | 8/10 | 5383 days | 35% |
| Werner and Rita | 9/10 | 5390 days | 35% |
| Richard Dudfield | 10/10 | 5392 days | 36% |
| Sayaka | 7/10 | 5392 days | 33% |
| Urs and Isabella | 7/10 | 5393 days | 33% |
| Juliane Kleiu | 10/10 | 5396 days | 36% |
| Linda Kremer | 9/10 | 5397 days | 35% |
| Rebecca Johnston | 9/10 | 5397 days | 35% |
| David Mellard | 10/10 | 5398 days | 36% |
| Bruce & Elaine Chote | 10/10 | 5398 days | 36% |
| Paul Nickson | 8/10 | 5398 days | 35% |
| Monique | 8/10 | 5398 days | 35% |
| Beat & Connie | 10/10 | 5400 days | 36% |
| Alex Stil | 9/10 | 5400 days | 35% |
| Pein van Nosrt | 7/10 | 5405 days | 33% |
| Raith | 9/10 | 5405 days | 35% |
| Elise van Haastert | 8/10 | 5405 days | 35% |
| Claudia | 10/10 | 5407 days | 36% |
| Carolin Ranner | 6/10 | 5407 days | 30% |
| Winskowsky | 9/10 | 5408 days | 35% |
| Hvid | 9/10 | 5422 days | 35% |
| Judith K. | 6/10 | 5424 days | 30% |
| Ruben and Jetske | 7/10 | 5424 days | 33% |
| Roy Seymour | 9/10 | 5425 days | 35% |
| Tom Hill | 10/10 | 5429 days | 36% |
| Ruua Reyrink | 7/10 | 5430 days | 33% |
| Patrick Hugener | 9/10 | 5430 days | 35% |
| JohnHaestad | 4/10 | 5434 days | 23% |
| dollimyxture | 10/10 | 5465 days | 36% |
| aggiemary04 | 10/10 | 5557 days | 36% |
| victoriauk | 4/10 | 5679 days | 23% |
| Baumgarten | 8/10 | 5707 days | 35% |
| travelbunnyadventures | 8/10 | 5710 days | 35% |
| Don & Geraldine | 10/10 | 5746 days | 36% |
| Matthias & Ceristiane | 8/10 | 5758 days | 35% |
| Hilary and Chris Ayton | 9/10 | 5759 days | 35% |
| Lis & Rob Tate | 9/10 | 5761 days | 35% |
| ccthornton100 | 10/10 | 5771 days | 36% |
| Bob Kusesia | 10/10 | 5772 days | 36% |
| Yssel de Schepper | 7/10 | 5777 days | 33% |
| Janny Meerdinnk Veldboow | 7/10 | 5777 days | 33% |
| Arie Ascher | 9/10 | 5778 days | 35% |
| Wolfgang Engelke | 10/10 | 5780 days | 36% |
| Thomas K | 9/10 | 5780 days | 35% |
| Loleit | 7/10 | 5792 days | 33% |
| Mattias Thorm | 9/10 | 5793 days | 35% |
| Vincente Garrido | 4/10 | 5794 days | 23% |
| R Gilge | 10/10 | 5795 days | 36% |
| Erik Hummelmose | 8/10 | 5795 days | 35% |
| Ian E | 6/10 | 5795 days | 30% |
| Nadine Schaee | 9/10 | 5796 days | 35% |
| Belinda Godhard | 2/10 | 5796 days | 15% |
| Uwe Rieper | 10/10 | 5798 days | 36% |
| E.M. Prideaux | 10/10 | 5813 days | 36% |
| Elizabeth E | 8/10 | 5815 days | 35% |
| Stevens Frans | 8/10 | 5816 days | 35% |
| Heinrich Hax | 9/10 | 5819 days | 35% |
| tanh | 7/10 | 5846 days | 33% |
| Stephanie Steiner | 8/10 | 5865 days | 35% |
| Julia May | 9/10 | 5872 days | 35% |
| X Neils | 7/10 | 5883 days | 33% |
| Sarah Smith | 5/10 | 5887 days | 27% |
| Anna | 6/10 | 5891 days | 30% |
| OliverG1 | 7/10 | 6093 days | 33% |
| Philipp | 5/10 | 6105 days | 27% |
| JasminA | 5/10 | 6105 days | 27% |
| ChristinaV | 8/10 | 6114 days | 35% |
| JuergenSchnitzer | 9/10 | 6121 days | 35% |
| AstridVG | 7/10 | 6121 days | 33% |
| NatasjaV | 7/10 | 6123 days | 33% |
| JimmyK | 7/10 | 6123 days | 33% |
| MarcoJ | 9/10 | 6125 days | 35% |
| LucyPoland | 9/10 | 6126 days | 35% |
| Stolz | 7/10 | 6128 days | 33% |
| BrzezinskaM | 10/10 | 6130 days | 36% |
| AndreB | 10/10 | 6130 days | 36% |
| Linda | 7/10 | 6136 days | 33% |
| Susan | 8/10 | 6137 days | 35% |
| Byleveld | 7/10 | 6138 days | 33% |
| JoseB | 8/10 | 6139 days | 35% |
| JetteG | 10/10 | 6139 days | 36% |
| CarolF | 7/10 | 6140 days | 33% |
| Rachel | 9/10 | 6154 days | 35% |
| Claire | 7/10 | 6154 days | 33% |
| Denise | 8/10 | 6155 days | 35% |
| Denk | 8/10 | 6167 days | 35% |
| Klalis | 10/10 | 6169 days | 36% |
| Thomas | 4/10 | 6173 days | 23% |
| Mike | 5/10 | 6174 days | 27% |
| Debbie Mossman | 9/10 | 6180 days | 35% |
| Johann | 10/10 | 6181 days | 36% |
| Carina | 10/10 | 6183 days | 36% |
| Mat | 8/10 | 6222 days | 35% |
| Anette | 7/10 | 6224 days | 33% |
| midlands_missus | 8/10 | 6227 days | 35% |
| David | 7/10 | 6282 days | 33% |
| Suyin | 10/10 | 6303 days | 36% |
| Franz | 10/10 | 6476 days | 36% |
| Jennifer Baulch | 7/10 | 6481 days | 33% |
| George Jeffs | 10/10 | 6484 days | 36% |
| Jacob | 9/10 | 6488 days | 35% |
| Aharon | 10/10 | 6503 days | 36% |
| D.A. Mulder | 8/10 | 6504 days | 35% |
| Knol | 8/10 | 6506 days | 35% |
| Cole Penelope | 8/10 | 6509 days | 35% |
| Jody | 7/10 | 6517 days | 33% |
| Anna | 5/10 | 6517 days | 27% |
| Pauline Thai | 8/10 | 6524 days | 35% |
| Dan Adamson | 8/10 | 6524 days | 35% |
| Stephen Brightman | 8/10 | 6533 days | 35% |
| Madeleine Rowland | 8/10 | 6533 days | 35% |
| Bronwyn Gaby | 9/10 | 6551 days | 35% |
| Free_ride | 9/10 | 6567 days | 35% |
| Michael | 9/10 | 6590 days | 35% |
| Raul | 10/10 | 6840 days | 36% |
| TeamFlorida | 9/10 | 6842 days | 35% |
| TeamFlorida | 8/10 | 6842 days | 35% |
| James | 9/10 | 6855 days | 35% |
| Rudi | 10/10 | 6859 days | 36% |
| Rolf Kruger | 10/10 | 6883 days | 36% |
| Brian | 10/10 | 6887 days | 36% |
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
-4.05% 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 | -3.99% |
| 198 | -4.01% |
| 199 | -4.03% |
| 200 | -4.05% |
| 201 | -4.07% |
| 202 | -4.09% |
| 203 | -4.11% |
| … | … |
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.