Hi, 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 | 2956 days | 100% |
| Dan Coates | 9/10 | 3189 days | 83% |
| Dominik | 9/10 | 3189 days | 83% |
| Holloway | 10/10 | 3212 days | 82% |
| Christina | 6/10 | 3280 days | 66% |
| Barbara Knops | 9/10 | 3282 days | 77% |
| Manu Liberta | 10/10 | 3292 days | 77% |
| Bruno | 9/10 | 3302 days | 75% |
| Kirsty Smith | 10/10 | 3325 days | 74% |
| Sophia Satter | 8/10 | 3336 days | 72% |
| Afiya Levy | 10/10 | 3557 days | 57% |
| Johannes Eisel | 6/10 | 3566 days | 49% |
| Alexander Mattea | 5/10 | 3566 days | 43% |
| Timea Bagosi | 9/10 | 3568 days | 56% |
| Riviere | 8/10 | 3580 days | 55% |
| Dani | 8/10 | 3582 days | 54% |
| Benoit Leclerc | 7/10 | 3584 days | 51% |
| Anna Stoehr | 10/10 | 3602 days | 54% |
| Kai Krchmar | 6/10 | 3655 days | 43% |
| Kristina Farkas | 5/10 | 3950 days | 22% |
| Sophia Kadel | 10/10 | 3980 days | 27% |
| Laura and Marie | 7/10 | 3986 days | 24% |
| Rachel S | 10/10 | 3993 days | 26% |
| Joris Giullemot | 8/10 | 4302 days | 3% |
| Laura Metz | 7/10 | 4313 days | 2% |
| Hubertus Thost | 7/10 | 4313 days | 2% |
| Amanda | 4/10 | 4328 days | 0% |
| S B | 10/10 | 4341 days | 1% |
| M K | 10/10 | 4341 days | 1% |
| Maya Bakker-deDreu | 8/10 | 4349 days | 0% |
| Christin Woelk | 9/10 | 4629 days | 34% |
| Maria Klister | 7/10 | 4649 days | 32% |
| Lydia Kleinkoenen | 9/10 | 4669 days | 34% |
| Jessica Grewe | 9/10 | 4669 days | 34% |
| Hannah Lia-Isis Kubillus | 9/10 | 4669 days | 34% |
| Jan Zimmerman | 8/10 | 4680 days | 34% |
| Margaret and Derek McNeil | 10/10 | 4740 days | 35% |
| Frank and Suzanne | 8/10 | 4755 days | 34% |
| RollingMoon | 8/10 | 4816 days | 34% |
| Marcel & Kim Meichtry | 7/10 | 5036 days | 32% |
| Howell Davies | 5/10 | 5039 days | 26% |
| Baas | 7/10 | 5039 days | 32% |
| Pete & Pat Etheridge | 8/10 | 5039 days | 34% |
| Siegfried Richter | 7/10 | 5040 days | 32% |
| Melanie Mathiak | 10/10 | 5042 days | 35% |
| Sig Schrattner | 8/10 | 5042 days | 34% |
| Rebecca Doehl | 7/10 | 5043 days | 32% |
| Seth & Carla | 7/10 | 5044 days | 32% |
| Gabriele Wendt | 9/10 | 5044 days | 34% |
| Tadej Ferjan | 8/10 | 5044 days | 34% |
| Mary Mitchell | 10/10 | 5044 days | 35% |
| Emily Wikston | 9/10 | 5045 days | 34% |
| Andreas & Leonie Fehr | 10/10 | 5051 days | 35% |
| Horst Langstein | 9/10 | 5052 days | 34% |
| Marco Scheiber | 9/10 | 5053 days | 34% |
| Friedrich Kaltner | 10/10 | 5055 days | 35% |
| Frank & Julia | 10/10 | 5058 days | 35% |
| Thyg Lingdal | 10/10 | 5058 days | 35% |
| Nicole van Bergen | 8/10 | 5058 days | 34% |
| Mike & April Prince | 7/10 | 5072 days | 32% |
| Alfred & Henrike | 8/10 | 5084 days | 34% |
| Lyn Stainton | 6/10 | 5133 days | 30% |
| Ken Talan | 10/10 | 5361 days | 35% |
| Jon_and_Family | 9/10 | 5365 days | 34% |
| Gertz | 10/10 | 5369 days | 35% |
| Katarina Bokor | 8/10 | 5373 days | 34% |
| Mark Franklin | 6/10 | 5373 days | 30% |
| Gordon Agent | 10/10 | 5373 days | 35% |
| Maureen Hardy | 8/10 | 5373 days | 34% |
| AJ van Pelt | 8/10 | 5373 days | 34% |
| Werner and Rita | 9/10 | 5380 days | 34% |
| Richard Dudfield | 10/10 | 5382 days | 35% |
| Sayaka | 7/10 | 5382 days | 32% |
| Urs and Isabella | 7/10 | 5383 days | 32% |
| Juliane Kleiu | 10/10 | 5386 days | 35% |
| Linda Kremer | 9/10 | 5387 days | 34% |
| Rebecca Johnston | 9/10 | 5387 days | 34% |
| David Mellard | 10/10 | 5388 days | 35% |
| Bruce & Elaine Chote | 10/10 | 5388 days | 35% |
| Paul Nickson | 8/10 | 5388 days | 34% |
| Monique | 8/10 | 5388 days | 34% |
| Beat & Connie | 10/10 | 5390 days | 35% |
| Alex Stil | 9/10 | 5390 days | 34% |
| Pein van Nosrt | 7/10 | 5395 days | 32% |
| Raith | 9/10 | 5395 days | 34% |
| Elise van Haastert | 8/10 | 5395 days | 34% |
| Claudia | 10/10 | 5397 days | 35% |
| Carolin Ranner | 6/10 | 5397 days | 30% |
| Winskowsky | 9/10 | 5398 days | 34% |
| Hvid | 9/10 | 5412 days | 34% |
| Judith K. | 6/10 | 5414 days | 30% |
| Ruben and Jetske | 7/10 | 5414 days | 32% |
| Roy Seymour | 9/10 | 5415 days | 34% |
| Tom Hill | 10/10 | 5419 days | 35% |
| Ruua Reyrink | 7/10 | 5420 days | 32% |
| Patrick Hugener | 9/10 | 5420 days | 34% |
| JohnHaestad | 4/10 | 5424 days | 22% |
| dollimyxture | 10/10 | 5455 days | 35% |
| aggiemary04 | 10/10 | 5547 days | 35% |
| victoriauk | 4/10 | 5669 days | 22% |
| Baumgarten | 8/10 | 5697 days | 34% |
| travelbunnyadventures | 8/10 | 5700 days | 34% |
| Don & Geraldine | 10/10 | 5736 days | 35% |
| Matthias & Ceristiane | 8/10 | 5748 days | 34% |
| Hilary and Chris Ayton | 9/10 | 5749 days | 34% |
| Lis & Rob Tate | 9/10 | 5751 days | 34% |
| ccthornton100 | 10/10 | 5761 days | 35% |
| Bob Kusesia | 10/10 | 5762 days | 35% |
| Yssel de Schepper | 7/10 | 5767 days | 32% |
| Janny Meerdinnk Veldboow | 7/10 | 5767 days | 32% |
| Arie Ascher | 9/10 | 5768 days | 34% |
| Wolfgang Engelke | 10/10 | 5770 days | 35% |
| Thomas K | 9/10 | 5770 days | 34% |
| Loleit | 7/10 | 5782 days | 32% |
| Mattias Thorm | 9/10 | 5783 days | 34% |
| Vincente Garrido | 4/10 | 5784 days | 22% |
| R Gilge | 10/10 | 5785 days | 35% |
| Erik Hummelmose | 8/10 | 5785 days | 34% |
| Ian E | 6/10 | 5785 days | 30% |
| Nadine Schaee | 9/10 | 5786 days | 34% |
| Belinda Godhard | 2/10 | 5786 days | 15% |
| Uwe Rieper | 10/10 | 5788 days | 35% |
| E.M. Prideaux | 10/10 | 5803 days | 35% |
| Elizabeth E | 8/10 | 5805 days | 34% |
| Stevens Frans | 8/10 | 5806 days | 34% |
| Heinrich Hax | 9/10 | 5809 days | 34% |
| tanh | 7/10 | 5836 days | 32% |
| Stephanie Steiner | 8/10 | 5855 days | 34% |
| Julia May | 9/10 | 5862 days | 34% |
| X Neils | 7/10 | 5873 days | 32% |
| Sarah Smith | 5/10 | 5877 days | 26% |
| Anna | 6/10 | 5881 days | 30% |
| OliverG1 | 7/10 | 6083 days | 32% |
| Philipp | 5/10 | 6095 days | 26% |
| JasminA | 5/10 | 6095 days | 26% |
| ChristinaV | 8/10 | 6104 days | 34% |
| JuergenSchnitzer | 9/10 | 6111 days | 34% |
| AstridVG | 7/10 | 6111 days | 32% |
| NatasjaV | 7/10 | 6113 days | 32% |
| JimmyK | 7/10 | 6113 days | 32% |
| MarcoJ | 9/10 | 6115 days | 34% |
| LucyPoland | 9/10 | 6116 days | 34% |
| Stolz | 7/10 | 6118 days | 32% |
| BrzezinskaM | 10/10 | 6120 days | 35% |
| AndreB | 10/10 | 6120 days | 35% |
| Linda | 7/10 | 6126 days | 32% |
| Susan | 8/10 | 6127 days | 34% |
| Byleveld | 7/10 | 6128 days | 32% |
| JoseB | 8/10 | 6129 days | 34% |
| JetteG | 10/10 | 6129 days | 35% |
| CarolF | 7/10 | 6130 days | 32% |
| Rachel | 9/10 | 6144 days | 34% |
| Claire | 7/10 | 6144 days | 32% |
| Denise | 8/10 | 6145 days | 34% |
| Denk | 8/10 | 6157 days | 34% |
| Klalis | 10/10 | 6159 days | 35% |
| Thomas | 4/10 | 6163 days | 22% |
| Mike | 5/10 | 6164 days | 26% |
| Debbie Mossman | 9/10 | 6169 days | 34% |
| Johann | 10/10 | 6171 days | 35% |
| Carina | 10/10 | 6173 days | 35% |
| Mat | 8/10 | 6212 days | 34% |
| Anette | 7/10 | 6214 days | 32% |
| midlands_missus | 8/10 | 6216 days | 34% |
| David | 7/10 | 6272 days | 32% |
| Suyin | 10/10 | 6292 days | 35% |
| Franz | 10/10 | 6466 days | 35% |
| Jennifer Baulch | 7/10 | 6471 days | 32% |
| George Jeffs | 10/10 | 6474 days | 35% |
| Jacob | 9/10 | 6478 days | 34% |
| Aharon | 10/10 | 6493 days | 35% |
| D.A. Mulder | 8/10 | 6494 days | 34% |
| Knol | 8/10 | 6496 days | 34% |
| Cole Penelope | 8/10 | 6499 days | 34% |
| Jody | 7/10 | 6507 days | 32% |
| Anna | 5/10 | 6507 days | 26% |
| Pauline Thai | 8/10 | 6514 days | 34% |
| Dan Adamson | 8/10 | 6514 days | 34% |
| Stephen Brightman | 8/10 | 6523 days | 34% |
| Madeleine Rowland | 8/10 | 6523 days | 34% |
| Bronwyn Gaby | 9/10 | 6541 days | 34% |
| Free_ride | 9/10 | 6556 days | 34% |
| Michael | 9/10 | 6580 days | 34% |
| Raul | 10/10 | 6830 days | 35% |
| TeamFlorida | 9/10 | 6832 days | 34% |
| TeamFlorida | 8/10 | 6832 days | 34% |
| James | 9/10 | 6845 days | 34% |
| Rudi | 10/10 | 6849 days | 35% |
| Rolf Kruger | 10/10 | 6873 days | 35% |
| Brian | 10/10 | 6877 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.