Hey, 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 | 2962 days | 100% |
| Dan Coates | 9/10 | 3195 days | 83% |
| Dominik | 9/10 | 3195 days | 83% |
| Holloway | 10/10 | 3218 days | 82% |
| Christina | 6/10 | 3286 days | 67% |
| Barbara Knops | 9/10 | 3288 days | 77% |
| Manu Liberta | 10/10 | 3298 days | 77% |
| Bruno | 9/10 | 3308 days | 75% |
| Kirsty Smith | 10/10 | 3331 days | 74% |
| Sophia Satter | 8/10 | 3342 days | 72% |
| Afiya Levy | 10/10 | 3563 days | 57% |
| Johannes Eisel | 6/10 | 3572 days | 49% |
| Alexander Mattea | 5/10 | 3572 days | 43% |
| Timea Bagosi | 9/10 | 3575 days | 56% |
| Riviere | 8/10 | 3586 days | 55% |
| Dani | 8/10 | 3588 days | 55% |
| Benoit Leclerc | 7/10 | 3590 days | 52% |
| Anna Stoehr | 10/10 | 3608 days | 54% |
| Kai Krchmar | 6/10 | 3661 days | 43% |
| Kristina Farkas | 5/10 | 3956 days | 22% |
| Sophia Kadel | 10/10 | 3986 days | 27% |
| Laura and Marie | 7/10 | 3992 days | 24% |
| Rachel S | 10/10 | 4000 days | 26% |
| Joris Giullemot | 8/10 | 4308 days | 3% |
| Laura Metz | 7/10 | 4319 days | 2% |
| Hubertus Thost | 7/10 | 4319 days | 2% |
| Amanda | 4/10 | 4334 days | 0% |
| S B | 10/10 | 4347 days | 1% |
| M K | 10/10 | 4347 days | 1% |
| Maya Bakker-deDreu | 8/10 | 4355 days | 0% |
| Christin Woelk | 9/10 | 4635 days | 35% |
| Maria Klister | 7/10 | 4655 days | 33% |
| Lydia Kleinkoenen | 9/10 | 4675 days | 35% |
| Jessica Grewe | 9/10 | 4675 days | 35% |
| Hannah Lia-Isis Kubillus | 9/10 | 4675 days | 35% |
| Jan Zimmerman | 8/10 | 4686 days | 35% |
| Margaret and Derek McNeil | 10/10 | 4746 days | 35% |
| Frank and Suzanne | 8/10 | 4761 days | 35% |
| RollingMoon | 8/10 | 4822 days | 35% |
| Marcel & Kim Meichtry | 7/10 | 5042 days | 33% |
| Howell Davies | 5/10 | 5045 days | 26% |
| Baas | 7/10 | 5045 days | 33% |
| Pete & Pat Etheridge | 8/10 | 5045 days | 35% |
| Siegfried Richter | 7/10 | 5046 days | 33% |
| Melanie Mathiak | 10/10 | 5048 days | 35% |
| Sig Schrattner | 8/10 | 5048 days | 35% |
| Rebecca Doehl | 7/10 | 5049 days | 33% |
| Seth & Carla | 7/10 | 5050 days | 33% |
| Gabriele Wendt | 9/10 | 5050 days | 35% |
| Tadej Ferjan | 8/10 | 5050 days | 35% |
| Mary Mitchell | 10/10 | 5050 days | 35% |
| Emily Wikston | 9/10 | 5051 days | 35% |
| Andreas & Leonie Fehr | 10/10 | 5057 days | 35% |
| Horst Langstein | 9/10 | 5058 days | 35% |
| Marco Scheiber | 9/10 | 5059 days | 35% |
| Friedrich Kaltner | 10/10 | 5061 days | 35% |
| Frank & Julia | 10/10 | 5064 days | 35% |
| Thyg Lingdal | 10/10 | 5064 days | 35% |
| Nicole van Bergen | 8/10 | 5064 days | 35% |
| Mike & April Prince | 7/10 | 5078 days | 33% |
| Alfred & Henrike | 8/10 | 5090 days | 35% |
| Lyn Stainton | 6/10 | 5139 days | 30% |
| Ken Talan | 10/10 | 5367 days | 35% |
| Jon_and_Family | 9/10 | 5371 days | 35% |
| Gertz | 10/10 | 5375 days | 35% |
| Katarina Bokor | 8/10 | 5379 days | 35% |
| Mark Franklin | 6/10 | 5379 days | 30% |
| Gordon Agent | 10/10 | 5379 days | 35% |
| Maureen Hardy | 8/10 | 5379 days | 35% |
| AJ van Pelt | 8/10 | 5379 days | 35% |
| Werner and Rita | 9/10 | 5386 days | 35% |
| Richard Dudfield | 10/10 | 5388 days | 35% |
| Sayaka | 7/10 | 5388 days | 33% |
| Urs and Isabella | 7/10 | 5389 days | 33% |
| Juliane Kleiu | 10/10 | 5392 days | 35% |
| Linda Kremer | 9/10 | 5393 days | 35% |
| Rebecca Johnston | 9/10 | 5393 days | 35% |
| David Mellard | 10/10 | 5394 days | 35% |
| Bruce & Elaine Chote | 10/10 | 5394 days | 35% |
| Paul Nickson | 8/10 | 5394 days | 35% |
| Monique | 8/10 | 5394 days | 35% |
| Beat & Connie | 10/10 | 5396 days | 35% |
| Alex Stil | 9/10 | 5396 days | 35% |
| Pein van Nosrt | 7/10 | 5401 days | 33% |
| Raith | 9/10 | 5401 days | 35% |
| Elise van Haastert | 8/10 | 5401 days | 35% |
| Claudia | 10/10 | 5403 days | 35% |
| Carolin Ranner | 6/10 | 5403 days | 30% |
| Winskowsky | 9/10 | 5404 days | 35% |
| Hvid | 9/10 | 5418 days | 35% |
| Judith K. | 6/10 | 5420 days | 30% |
| Ruben and Jetske | 7/10 | 5420 days | 33% |
| Roy Seymour | 9/10 | 5421 days | 35% |
| Tom Hill | 10/10 | 5425 days | 35% |
| Ruua Reyrink | 7/10 | 5426 days | 33% |
| Patrick Hugener | 9/10 | 5426 days | 35% |
| JohnHaestad | 4/10 | 5430 days | 22% |
| dollimyxture | 10/10 | 5461 days | 35% |
| aggiemary04 | 10/10 | 5553 days | 35% |
| victoriauk | 4/10 | 5675 days | 22% |
| Baumgarten | 8/10 | 5703 days | 35% |
| travelbunnyadventures | 8/10 | 5706 days | 35% |
| Don & Geraldine | 10/10 | 5742 days | 35% |
| Matthias & Ceristiane | 8/10 | 5754 days | 35% |
| Hilary and Chris Ayton | 9/10 | 5755 days | 35% |
| Lis & Rob Tate | 9/10 | 5757 days | 35% |
| ccthornton100 | 10/10 | 5767 days | 35% |
| Bob Kusesia | 10/10 | 5768 days | 35% |
| Yssel de Schepper | 7/10 | 5773 days | 33% |
| Janny Meerdinnk Veldboow | 7/10 | 5773 days | 33% |
| Arie Ascher | 9/10 | 5774 days | 35% |
| Wolfgang Engelke | 10/10 | 5776 days | 35% |
| Thomas K | 9/10 | 5776 days | 35% |
| Loleit | 7/10 | 5788 days | 33% |
| Mattias Thorm | 9/10 | 5789 days | 35% |
| Vincente Garrido | 4/10 | 5790 days | 22% |
| R Gilge | 10/10 | 5791 days | 35% |
| Erik Hummelmose | 8/10 | 5791 days | 35% |
| Ian E | 6/10 | 5791 days | 30% |
| Nadine Schaee | 9/10 | 5792 days | 35% |
| Belinda Godhard | 2/10 | 5792 days | 15% |
| Uwe Rieper | 10/10 | 5794 days | 35% |
| E.M. Prideaux | 10/10 | 5809 days | 35% |
| Elizabeth E | 8/10 | 5811 days | 35% |
| Stevens Frans | 8/10 | 5812 days | 35% |
| Heinrich Hax | 9/10 | 5815 days | 35% |
| tanh | 7/10 | 5842 days | 33% |
| Stephanie Steiner | 8/10 | 5861 days | 35% |
| Julia May | 9/10 | 5868 days | 35% |
| X Neils | 7/10 | 5879 days | 33% |
| Sarah Smith | 5/10 | 5883 days | 26% |
| Anna | 6/10 | 5887 days | 30% |
| OliverG1 | 7/10 | 6089 days | 33% |
| Philipp | 5/10 | 6101 days | 26% |
| JasminA | 5/10 | 6101 days | 26% |
| ChristinaV | 8/10 | 6111 days | 35% |
| JuergenSchnitzer | 9/10 | 6117 days | 35% |
| AstridVG | 7/10 | 6118 days | 33% |
| NatasjaV | 7/10 | 6119 days | 33% |
| JimmyK | 7/10 | 6119 days | 33% |
| MarcoJ | 9/10 | 6121 days | 35% |
| LucyPoland | 9/10 | 6122 days | 35% |
| Stolz | 7/10 | 6125 days | 33% |
| BrzezinskaM | 10/10 | 6126 days | 35% |
| AndreB | 10/10 | 6126 days | 35% |
| Linda | 7/10 | 6133 days | 33% |
| Susan | 8/10 | 6134 days | 35% |
| Byleveld | 7/10 | 6134 days | 33% |
| JoseB | 8/10 | 6135 days | 35% |
| JetteG | 10/10 | 6135 days | 35% |
| CarolF | 7/10 | 6136 days | 33% |
| Rachel | 9/10 | 6151 days | 35% |
| Claire | 7/10 | 6151 days | 33% |
| Denise | 8/10 | 6152 days | 35% |
| Denk | 8/10 | 6164 days | 35% |
| Klalis | 10/10 | 6166 days | 35% |
| Thomas | 4/10 | 6170 days | 22% |
| Mike | 5/10 | 6171 days | 26% |
| Debbie Mossman | 9/10 | 6176 days | 35% |
| Johann | 10/10 | 6178 days | 35% |
| Carina | 10/10 | 6180 days | 35% |
| Mat | 8/10 | 6219 days | 35% |
| Anette | 7/10 | 6221 days | 33% |
| midlands_missus | 8/10 | 6223 days | 35% |
| David | 7/10 | 6279 days | 33% |
| Suyin | 10/10 | 6299 days | 35% |
| Franz | 10/10 | 6472 days | 35% |
| Jennifer Baulch | 7/10 | 6477 days | 33% |
| George Jeffs | 10/10 | 6480 days | 35% |
| Jacob | 9/10 | 6484 days | 35% |
| Aharon | 10/10 | 6499 days | 35% |
| D.A. Mulder | 8/10 | 6500 days | 35% |
| Knol | 8/10 | 6502 days | 35% |
| Cole Penelope | 8/10 | 6505 days | 35% |
| Jody | 7/10 | 6513 days | 33% |
| Anna | 5/10 | 6513 days | 26% |
| Pauline Thai | 8/10 | 6520 days | 35% |
| Dan Adamson | 8/10 | 6520 days | 35% |
| Stephen Brightman | 8/10 | 6529 days | 35% |
| Madeleine Rowland | 8/10 | 6529 days | 35% |
| Bronwyn Gaby | 9/10 | 6547 days | 35% |
| Free_ride | 9/10 | 6563 days | 35% |
| Michael | 9/10 | 6586 days | 35% |
| Raul | 10/10 | 6836 days | 35% |
| TeamFlorida | 9/10 | 6838 days | 35% |
| TeamFlorida | 8/10 | 6838 days | 35% |
| James | 9/10 | 6851 days | 35% |
| Rudi | 10/10 | 6855 days | 35% |
| Rolf Kruger | 10/10 | 6879 days | 35% |
| Brian | 10/10 | 6883 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
-4.06% 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 | -4.00% |
| 198 | -4.02% |
| 199 | -4.04% |
| 200 | -4.06% |
| 201 | -4.08% |
| 202 | -4.10% |
| 203 | -4.12% |
| … | … |
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.