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
83.56%
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 | 3034 days | 100% |
| Dan Coates | 9/10 | 3267 days | 79% |
| Dominik | 9/10 | 3267 days | 79% |
| Holloway | 10/10 | 3290 days | 78% |
| Christina | 6/10 | 3358 days | 59% |
| Barbara Knops | 9/10 | 3360 days | 71% |
| Manu Liberta | 10/10 | 3370 days | 71% |
| Bruno | 9/10 | 3380 days | 69% |
| Kirsty Smith | 10/10 | 3403 days | 68% |
| Sophia Satter | 8/10 | 3414 days | 65% |
| Afiya Levy | 10/10 | 3635 days | 47% |
| Johannes Eisel | 6/10 | 3644 days | 36% |
| Alexander Mattea | 5/10 | 3644 days | 30% |
| Timea Bagosi | 9/10 | 3646 days | 45% |
| Riviere | 8/10 | 3658 days | 43% |
| Dani | 8/10 | 3660 days | 43% |
| Benoit Leclerc | 7/10 | 3662 days | 40% |
| Anna Stoehr | 10/10 | 3680 days | 42% |
| Kai Krchmar | 6/10 | 3733 days | 30% |
| Kristina Farkas | 5/10 | 4028 days | 3% |
| Sophia Kadel | 10/10 | 4058 days | 8% |
| Laura and Marie | 7/10 | 4064 days | 6% |
| Rachel S | 10/10 | 4071 days | 7% |
| Joris Giullemot | 8/10 | 4380 days | 24% |
| Laura Metz | 7/10 | 4391 days | 22% |
| Hubertus Thost | 7/10 | 4391 days | 22% |
| Amanda | 4/10 | 4406 days | 9% |
| S B | 10/10 | 4419 days | 25% |
| M K | 10/10 | 4419 days | 25% |
| Maya Bakker-deDreu | 8/10 | 4427 days | 24% |
| Christin Woelk | 9/10 | 4707 days | 25% |
| Maria Klister | 7/10 | 4727 days | 22% |
| Lydia Kleinkoenen | 9/10 | 4747 days | 25% |
| Jessica Grewe | 9/10 | 4747 days | 25% |
| Hannah Lia-Isis Kubillus | 9/10 | 4747 days | 25% |
| Jan Zimmerman | 8/10 | 4758 days | 24% |
| Margaret and Derek McNeil | 10/10 | 4818 days | 25% |
| Frank and Suzanne | 8/10 | 4833 days | 24% |
| RollingMoon | 8/10 | 4894 days | 24% |
| Marcel & Kim Meichtry | 7/10 | 5114 days | 22% |
| Howell Davies | 5/10 | 5117 days | 14% |
| Baas | 7/10 | 5117 days | 22% |
| Pete & Pat Etheridge | 8/10 | 5117 days | 24% |
| Siegfried Richter | 7/10 | 5118 days | 22% |
| Melanie Mathiak | 10/10 | 5120 days | 25% |
| Sig Schrattner | 8/10 | 5120 days | 24% |
| Rebecca Doehl | 7/10 | 5121 days | 22% |
| Seth & Carla | 7/10 | 5122 days | 22% |
| Gabriele Wendt | 9/10 | 5122 days | 25% |
| Tadej Ferjan | 8/10 | 5122 days | 24% |
| Mary Mitchell | 10/10 | 5122 days | 25% |
| Emily Wikston | 9/10 | 5123 days | 25% |
| Andreas & Leonie Fehr | 10/10 | 5129 days | 25% |
| Horst Langstein | 9/10 | 5130 days | 25% |
| Marco Scheiber | 9/10 | 5131 days | 25% |
| Friedrich Kaltner | 10/10 | 5133 days | 25% |
| Frank & Julia | 10/10 | 5136 days | 25% |
| Thyg Lingdal | 10/10 | 5136 days | 25% |
| Nicole van Bergen | 8/10 | 5136 days | 24% |
| Mike & April Prince | 7/10 | 5150 days | 22% |
| Alfred & Henrike | 8/10 | 5162 days | 24% |
| Lyn Stainton | 6/10 | 5211 days | 19% |
| Ken Talan | 10/10 | 5438 days | 25% |
| Jon_and_Family | 9/10 | 5443 days | 25% |
| Gertz | 10/10 | 5447 days | 25% |
| Katarina Bokor | 8/10 | 5451 days | 24% |
| Mark Franklin | 6/10 | 5451 days | 19% |
| Gordon Agent | 10/10 | 5451 days | 25% |
| Maureen Hardy | 8/10 | 5451 days | 24% |
| AJ van Pelt | 8/10 | 5451 days | 24% |
| Werner and Rita | 9/10 | 5458 days | 25% |
| Richard Dudfield | 10/10 | 5460 days | 25% |
| Sayaka | 7/10 | 5460 days | 22% |
| Urs and Isabella | 7/10 | 5461 days | 22% |
| Juliane Kleiu | 10/10 | 5464 days | 25% |
| Linda Kremer | 9/10 | 5465 days | 25% |
| Rebecca Johnston | 9/10 | 5465 days | 25% |
| David Mellard | 10/10 | 5466 days | 25% |
| Bruce & Elaine Chote | 10/10 | 5466 days | 25% |
| Paul Nickson | 8/10 | 5466 days | 24% |
| Monique | 8/10 | 5466 days | 24% |
| Beat & Connie | 10/10 | 5468 days | 25% |
| Alex Stil | 9/10 | 5468 days | 25% |
| Pein van Nosrt | 7/10 | 5473 days | 22% |
| Raith | 9/10 | 5473 days | 25% |
| Elise van Haastert | 8/10 | 5473 days | 24% |
| Claudia | 10/10 | 5475 days | 25% |
| Carolin Ranner | 6/10 | 5475 days | 19% |
| Winskowsky | 9/10 | 5476 days | 25% |
| Hvid | 9/10 | 5490 days | 25% |
| Judith K. | 6/10 | 5492 days | 19% |
| Ruben and Jetske | 7/10 | 5492 days | 22% |
| Roy Seymour | 9/10 | 5493 days | 25% |
| Tom Hill | 10/10 | 5497 days | 25% |
| Ruua Reyrink | 7/10 | 5498 days | 22% |
| Patrick Hugener | 9/10 | 5498 days | 25% |
| JohnHaestad | 4/10 | 5502 days | 9% |
| dollimyxture | 10/10 | 5533 days | 25% |
| aggiemary04 | 10/10 | 5625 days | 25% |
| victoriauk | 4/10 | 5746 days | 9% |
| Baumgarten | 8/10 | 5774 days | 24% |
| travelbunnyadventures | 8/10 | 5777 days | 24% |
| Don & Geraldine | 10/10 | 5814 days | 25% |
| Matthias & Ceristiane | 8/10 | 5826 days | 24% |
| Hilary and Chris Ayton | 9/10 | 5827 days | 25% |
| Lis & Rob Tate | 9/10 | 5829 days | 25% |
| ccthornton100 | 10/10 | 5839 days | 25% |
| Bob Kusesia | 10/10 | 5840 days | 25% |
| Yssel de Schepper | 7/10 | 5845 days | 22% |
| Janny Meerdinnk Veldboow | 7/10 | 5845 days | 22% |
| Arie Ascher | 9/10 | 5846 days | 25% |
| Wolfgang Engelke | 10/10 | 5848 days | 25% |
| Thomas K | 9/10 | 5848 days | 25% |
| Loleit | 7/10 | 5860 days | 22% |
| Mattias Thorm | 9/10 | 5861 days | 25% |
| Vincente Garrido | 4/10 | 5862 days | 9% |
| R Gilge | 10/10 | 5863 days | 25% |
| Erik Hummelmose | 8/10 | 5863 days | 24% |
| Ian E | 6/10 | 5863 days | 19% |
| Nadine Schaee | 9/10 | 5864 days | 25% |
| Belinda Godhard | 2/10 | 5864 days | 0% |
| Uwe Rieper | 10/10 | 5866 days | 25% |
| E.M. Prideaux | 10/10 | 5881 days | 25% |
| Elizabeth E | 8/10 | 5883 days | 24% |
| Stevens Frans | 8/10 | 5884 days | 24% |
| Heinrich Hax | 9/10 | 5887 days | 25% |
| tanh | 7/10 | 5914 days | 22% |
| Stephanie Steiner | 8/10 | 5933 days | 24% |
| Julia May | 9/10 | 5940 days | 25% |
| X Neils | 7/10 | 5951 days | 22% |
| Sarah Smith | 5/10 | 5955 days | 14% |
| Anna | 6/10 | 5959 days | 19% |
| OliverG1 | 7/10 | 6160 days | 22% |
| Philipp | 5/10 | 6173 days | 14% |
| JasminA | 5/10 | 6173 days | 14% |
| ChristinaV | 8/10 | 6182 days | 24% |
| JuergenSchnitzer | 9/10 | 6189 days | 25% |
| AstridVG | 7/10 | 6189 days | 22% |
| NatasjaV | 7/10 | 6191 days | 22% |
| JimmyK | 7/10 | 6191 days | 22% |
| MarcoJ | 9/10 | 6193 days | 25% |
| LucyPoland | 9/10 | 6194 days | 25% |
| Stolz | 7/10 | 6196 days | 22% |
| BrzezinskaM | 10/10 | 6198 days | 25% |
| AndreB | 10/10 | 6198 days | 25% |
| Linda | 7/10 | 6204 days | 22% |
| Susan | 8/10 | 6205 days | 24% |
| Byleveld | 7/10 | 6206 days | 22% |
| JoseB | 8/10 | 6207 days | 24% |
| JetteG | 10/10 | 6207 days | 25% |
| CarolF | 7/10 | 6208 days | 22% |
| Rachel | 9/10 | 6222 days | 25% |
| Claire | 7/10 | 6222 days | 22% |
| Denise | 8/10 | 6223 days | 24% |
| Denk | 8/10 | 6235 days | 24% |
| Klalis | 10/10 | 6237 days | 25% |
| Thomas | 4/10 | 6241 days | 9% |
| Mike | 5/10 | 6242 days | 14% |
| Debbie Mossman | 9/10 | 6247 days | 25% |
| Johann | 10/10 | 6249 days | 25% |
| Carina | 10/10 | 6251 days | 25% |
| Mat | 8/10 | 6290 days | 24% |
| Anette | 7/10 | 6292 days | 22% |
| midlands_missus | 8/10 | 6294 days | 24% |
| David | 7/10 | 6350 days | 22% |
| Suyin | 10/10 | 6370 days | 25% |
| Franz | 10/10 | 6544 days | 25% |
| Jennifer Baulch | 7/10 | 6549 days | 22% |
| George Jeffs | 10/10 | 6552 days | 25% |
| Jacob | 9/10 | 6556 days | 25% |
| Aharon | 10/10 | 6571 days | 25% |
| D.A. Mulder | 8/10 | 6572 days | 24% |
| Knol | 8/10 | 6574 days | 24% |
| Cole Penelope | 8/10 | 6577 days | 24% |
| Jody | 7/10 | 6585 days | 22% |
| Anna | 5/10 | 6585 days | 14% |
| Pauline Thai | 8/10 | 6592 days | 24% |
| Dan Adamson | 8/10 | 6592 days | 24% |
| Stephen Brightman | 8/10 | 6601 days | 24% |
| Madeleine Rowland | 8/10 | 6601 days | 24% |
| Bronwyn Gaby | 9/10 | 6619 days | 25% |
| Free_ride | 9/10 | 6634 days | 25% |
| Michael | 9/10 | 6658 days | 25% |
| Raul | 10/10 | 6907 days | 25% |
| TeamFlorida | 9/10 | 6909 days | 25% |
| TeamFlorida | 8/10 | 6909 days | 24% |
| James | 9/10 | 6923 days | 25% |
| Rudi | 10/10 | 6927 days | 25% |
| Rolf Kruger | 10/10 | 6951 days | 25% |
| Brian | 10/10 | 6955 days | 25% |
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
-4.13% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 54 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 | -4.07% |
| 198 | -4.09% |
| 199 | -4.11% |
| 200 | -4.13% |
| 201 | -4.15% |
| 202 | -4.17% |
| 203 | -4.19% |
| … | … |
Balancing Adjustment
3.16% 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.