Kia ora, 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 Waitomo 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.
Waitomo Glowworm Caves
Valid Reviews
290 Valid Reviews
The Waitomo Glowworm Caves experience has a total of 291 reviews. There are 290 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 290 valid reviews:
| Rating | Count | Percentage | |
|---|---|---|---|
| 10/10 | 36 |
|
12% |
| 9/10 | 52 |
|
18% |
| 8/10 | 81 |
|
28% |
| 7/10 | 66 |
|
23% |
| 6/10 | 22 |
|
8% |
| 5/10 | 13 |
|
4% |
| 4/10 | 8 |
|
3% |
| 3/10 | 5 |
|
2% |
| 2/10 | 4 |
|
1% |
| 1/10 | 3 |
|
1% |
75.62% Average
The raw data average (mean) for all the Waitomo Glowworm Caves valid reviews is 75.62% and is based on 290 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
263 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 290 valid reviews, the experience has 263 face-to-face reviews collected during interviews by our team.
Below is the distribution of ratings for the 263 face-to-face reviews:
| Rating | Count | Percentage | |
|---|---|---|---|
| 10/10 | 29 |
|
11% |
| 9/10 | 49 |
|
19% |
| 8/10 | 76 |
|
29% |
| 7/10 | 57 |
|
22% |
| 6/10 | 21 |
|
8% |
| 5/10 | 13 |
|
5% |
| 4/10 | 7 |
|
3% |
| 3/10 | 5 |
|
2% |
| 2/10 | 4 |
|
2% |
| 1/10 | 2 |
|
1% |
75.36% Average
The raw data average (mean) for all the Waitomo Glowworm Caves face-to-face reviews is 75.36% and is based on 263 face-to-face reviews. This value is not used to calculate the ranking score and it only provided here for comparison purposes.
Weighted Average
75.85%
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 |
|---|---|---|---|
| Somysolanki | 7/10 | 492 days | 100% |
| Anne | 7/10 | 827 days | 71% |
| ros fraser | 4/10 | 2837 days | 2% |
| wynden | 1/10 | 2865 days | 1% |
| Rado Hank | 10/10 | 2952 days | 3% |
| Lizzie Edmonds | 8/10 | 2953 days | 3% |
| Anis Quentin | 7/10 | 2960 days | 3% |
| Jeny Smolders | 7/10 | 2964 days | 3% |
| Oscar Petersen | 8/10 | 2971 days | 3% |
| Ani | 9/10 | 3079 days | 3% |
| Martin Murlik | 8/10 | 3192 days | 3% |
| Laura | 9/10 | 3203 days | 3% |
| Melanie Farrell | 7/10 | 3211 days | 3% |
| Andy | 10/10 | 3218 days | 3% |
| Julia Achatz | 5/10 | 3232 days | 2% |
| Auba Mateos | 7/10 | 3238 days | 3% |
| Charlotte | 7/10 | 3238 days | 3% |
| Isabel Zedelius | 8/10 | 3241 days | 3% |
| Dries | 8/10 | 3281 days | 3% |
| Clarissa Glaser | 8/10 | 3282 days | 3% |
| Alna | 10/10 | 3287 days | 3% |
| Holger Worner | 9/10 | 3287 days | 3% |
| Karlee Hormell | 9/10 | 3296 days | 3% |
| Alonso | 9/10 | 3300 days | 3% |
| Rose Guillaume | 8/10 | 3303 days | 3% |
| Caroline Coudray | 8/10 | 3307 days | 3% |
| Barbara | 8/10 | 3307 days | 3% |
| Leonie Brabers | 7/10 | 3315 days | 2% |
| Bina Johansson | 10/10 | 3315 days | 3% |
| Sam Staines | 9/10 | 3319 days | 3% |
| Erik | 6/10 | 3322 days | 2% |
| Nicole Signer | 8/10 | 3329 days | 2% |
| Sam Taylor | 7/10 | 3333 days | 2% |
| Vanuxem | 8/10 | 3537 days | 2% |
| Clara Bertomeu | 10/10 | 3537 days | 2% |
| Lukas Boller | 9/10 | 3539 days | 2% |
| Mette Elholm | 7/10 | 3553 days | 2% |
| Mathilde Arp | 8/10 | 3553 days | 2% |
| Chloe and Guillame | 9/10 | 3557 days | 2% |
| Andre | 9/10 | 3559 days | 2% |
| Doerte | 10/10 | 3559 days | 2% |
| Saskia Peek | 9/10 | 3560 days | 2% |
| Erika Tarant | 8/10 | 3560 days | 2% |
| Jennifer Nguyen | 7/10 | 3561 days | 2% |
| Julie Duvert | 7/10 | 3561 days | 2% |
| Dan Ramsl | 4/10 | 3561 days | 1% |
| Lucy Mulvin | 7/10 | 3562 days | 2% |
| Fine Kochling | 9/10 | 3564 days | 2% |
| Eberhard | 9/10 | 3564 days | 2% |
| Hannes | 8/10 | 3565 days | 2% |
| Calum Penn | 9/10 | 3567 days | 2% |
| Arthur Portolleau | 6/10 | 3568 days | 2% |
| Elisabet | 10/10 | 3569 days | 2% |
| Tommy Mannien | 8/10 | 3570 days | 2% |
| Solange Bourbeois | 8/10 | 3573 days | 2% |
| Talissa Missiato | 10/10 | 3573 days | 2% |
| Severin Knegsch | 9/10 | 3574 days | 2% |
| Pierre Jouffineau | 10/10 | 3575 days | 2% |
| Lewis Whittle | 8/10 | 3577 days | 2% |
| Ben and Pauline | 8/10 | 3579 days | 2% |
| Ann-Kathrin | 7/10 | 3584 days | 2% |
| Natasha Harbinson | 10/10 | 3585 days | 2% |
| Sebastian | 2/10 | 3586 days | 1% |
| Jaquein Bucholz | 3/10 | 3586 days | 1% |
| Chiara | 7/10 | 3586 days | 2% |
| Cariotta Kemper | 3/10 | 3586 days | 1% |
| Megan Lenox | 7/10 | 3589 days | 2% |
| Max Mustermann | 8/10 | 3591 days | 2% |
| Amy Stafford | 8/10 | 3594 days | 2% |
| Carl | 7/10 | 3594 days | 2% |
| Briony | 7/10 | 3596 days | 2% |
| Melanie Kronbichler | 8/10 | 3597 days | 2% |
| Andreas Schiefer | 7/10 | 3598 days | 2% |
| Veronique Kaplan | 3/10 | 3600 days | 1% |
| Robin Ings | 6/10 | 3601 days | 2% |
| Stula Vladimir | 7/10 | 3602 days | 2% |
| David Soukal | 8/10 | 3602 days | 2% |
| Olivia Aliprandi | 7/10 | 3603 days | 2% |
| Isabelle | 2/10 | 3605 days | 1% |
| Jonathan Gourmel | 8/10 | 3605 days | 2% |
| Mikkel Palleson | 4/10 | 3608 days | 1% |
| Franziska and Sabine | 7/10 | 3609 days | 2% |
| Chloe Guerillot | 7/10 | 3609 days | 2% |
| Faye Oliver | 7/10 | 3611 days | 2% |
| Iris Kerbler | 9/10 | 3611 days | 2% |
| Til Schaebitz | 6/10 | 3612 days | 2% |
| Elisabeth Grabner | 9/10 | 3614 days | 2% |
| Berith | 10/10 | 3614 days | 2% |
| Chris Simpson | 6/10 | 3617 days | 2% |
| Pekka and Jonna | 9/10 | 3617 days | 2% |
| Jonas Hoerning | 8/10 | 3618 days | 2% |
| Nils | 10/10 | 3618 days | 2% |
| Mark Rosema | 8/10 | 3619 days | 2% |
| Lisa Huber | 10/10 | 3619 days | 2% |
| Nicola Wiggan | 9/10 | 3640 days | 2% |
| Linda and Gunther | 4/10 | 3641 days | 1% |
| Julie | 9/10 | 3642 days | 2% |
| Maria Schaer | 7/10 | 3646 days | 2% |
| Mette and Jesper | 5/10 | 3648 days | 1% |
| Pierre and Alexandra | 6/10 | 3654 days | 1% |
| Julia Waenninger | 8/10 | 3666 days | 2% |
| Sarah Boettcher | 9/10 | 3702 days | 2% |
| Suzanne Vermeulen | 6/10 | 3719 days | 1% |
| Blandine Giusti | 7/10 | 3922 days | 1% |
| Bart Hanssen | 6/10 | 4001 days | 1% |
| Astrid Egesten | 7/10 | 4052 days | 1% |
| Jean Curry | 9/10 | 4276 days | 0% |
| Carla Oyarzun | 1/10 | 4280 days | 0% |
| Philippe Chiasson | 9/10 | 4286 days | 0% |
| Helma Druyken | 4/10 | 4296 days | 0% |
| Florian Guttler | 7/10 | 4299 days | 0% |
| Casandra Prunica | 8/10 | 4300 days | 0% |
| Lauren Hedley | 7/10 | 4300 days | 0% |
| Janina Zwerver | 8/10 | 4300 days | 0% |
| Marieke Feyteres | 4/10 | 4304 days | 0% |
| van Linda Werner | 5/10 | 4304 days | 0% |
| Philip Donachie | 7/10 | 4314 days | 0% |
| Luisa Bach | 8/10 | 4314 days | 0% |
| Kristina | 7/10 | 4316 days | 0% |
| Eugen Lehner | 6/10 | 4317 days | 0% |
| Manuel Bach | 7/10 | 4317 days | 0% |
| Matthias Freiling | 2/10 | 4324 days | 0% |
| Debora Grusler | 6/10 | 4327 days | 0% |
| Andreas Brodhaeker | 8/10 | 4340 days | 0% |
| Renee van der Syde | 7/10 | 4341 days | 0% |
| Martha Horst | 8/10 | 4341 days | 0% |
| Roland Beer | 7/10 | 4345 days | 0% |
| Johanna Bak | 4/10 | 4345 days | 0% |
| Lior Bakski | 9/10 | 4355 days | 0% |
| Bet | 9/10 | 4356 days | 0% |
| Memain | 8/10 | 4629 days | 1% |
| Konza | 7/10 | 4630 days | 1% |
| Steen Rausmussen | 8/10 | 4661 days | 1% |
| David Restell | 10/10 | 4691 days | 1% |
| Christina Rodewald | 9/10 | 4696 days | 1% |
| Hanneke P | 7/10 | 4722 days | 1% |
| Kohler | 9/10 | 4742 days | 1% |
| Alexandra van den Brack | 6/10 | 4750 days | 1% |
| Paul Lawrence | 9/10 | 4751 days | 1% |
| Abby Rushmer | 7/10 | 4752 days | 1% |
| Stephan Olivier | 7/10 | 4757 days | 1% |
| Stephan Olivier | 7/10 | 4757 days | 1% |
| Faassen | 8/10 | 4761 days | 1% |
| Julie Lamart | 8/10 | 4762 days | 1% |
| Adrian Weidell | 5/10 | 4958 days | 1% |
| Jonathan Tuthill | 9/10 | 5013 days | 1% |
| A Ormsby | 10/10 | 5025 days | 1% |
| Gillian Rowe | 10/10 | 5038 days | 1% |
| Ryan Pynappels | 8/10 | 5039 days | 1% |
| Peter Dellen | 8/10 | 5040 days | 1% |
| Jorg Steffens | 8/10 | 5040 days | 1% |
| Danielle & Jobbe | 9/10 | 5042 days | 1% |
| Christina | 6/10 | 5043 days | 1% |
| Jop Veldhuis | 7/10 | 5043 days | 1% |
| Paul Weidenfeld | 8/10 | 5044 days | 1% |
| Sophie Dorrepaal | 7/10 | 5044 days | 1% |
| Fannette Peyreplane | 5/10 | 5045 days | 1% |
| Norm Cooper | 7/10 | 5049 days | 1% |
| Gloria, Rose & An | 8/10 | 5049 days | 1% |
| A Sorg | 10/10 | 5049 days | 1% |
| Samplonius | 5/10 | 5052 days | 1% |
| Petra | 10/10 | 5052 days | 1% |
| Bethany Hamilton | 8/10 | 5056 days | 1% |
| suffolkhouse69 | 9/10 | 5057 days | 1% |
| a a | 8/10 | 5088 days | 1% |
| Julia Balionis | 7/10 | 5102 days | 1% |
| Julia Hartman | 3/10 | 5103 days | 1% |
| Fabienne Indergand | 7/10 | 5123 days | 1% |
| Waldemar Schuler | 9/10 | 5135 days | 1% |
| pepette31 | 7/10 | 5210 days | 1% |
| Craig Hathaway | 9/10 | 5362 days | 1% |
| Stephane Lebel | 9/10 | 5367 days | 1% |
| Rens Hemselmans | 7/10 | 5380 days | 1% |
| Isabell | 10/10 | 5382 days | 1% |
| Holly Cave | 5/10 | 5382 days | 1% |
| J Palmer | 6/10 | 5386 days | 1% |
| Liz & Jim | 10/10 | 5388 days | 1% |
| Edgar & Marilyn Berry | 9/10 | 5390 days | 1% |
| Simon Vickers | 2/10 | 5393 days | 1% |
| Leslie | 8/10 | 5406 days | 1% |
| Jean-Francois Guilbault | 8/10 | 5407 days | 1% |
| Selina Mueller | 7/10 | 5408 days | 1% |
| Tamlin Barton | 3/10 | 5409 days | 1% |
| Cara Dungay | 8/10 | 5410 days | 1% |
| Bottcher | 10/10 | 5410 days | 1% |
| Alexandra | 10/10 | 5411 days | 1% |
| Philipp Rau | 7/10 | 5413 days | 1% |
| Dan Aldridge | 9/10 | 5415 days | 1% |
| John Allen | 8/10 | 5417 days | 1% |
| Curtis Penner | 8/10 | 5417 days | 1% |
| Brandt | 8/10 | 5419 days | 1% |
| Nadia Husain | 5/10 | 5422 days | 1% |
| T J Andrews | 6/10 | 5438 days | 1% |
| Charli Skinner | 7/10 | 5689 days | 1% |
| Carl_Larsen | 10/10 | 5698 days | 1% |
| Susan & Richard | 10/10 | 5759 days | 1% |
| Rik | 9/10 | 5760 days | 1% |
| Jonathan Martin | 7/10 | 5762 days | 1% |
| Gunda G | 9/10 | 5767 days | 1% |
| Aaron | 8/10 | 5769 days | 1% |
| Will Jemma | 6/10 | 5772 days | 1% |
| Christen Hans | 10/10 | 5773 days | 1% |
| Monica and Danie. | 7/10 | 5781 days | 1% |
| Stephen | 5/10 | 5783 days | 1% |
| Susan | 10/10 | 5783 days | 1% |
| snodge | 8/10 | 5787 days | 1% |
| Bo Moenstead | 9/10 | 5796 days | 1% |
| Alain Deslandres | 8/10 | 5800 days | 1% |
| Jakob Jurgen | 10/10 | 5801 days | 1% |
| EA Anders | 8/10 | 5804 days | 1% |
| Helen and Hans Walser | 1/10 | 5807 days | 0% |
| kevinp | 8/10 | 5830 days | 1% |
| warrenp | 9/10 | 5834 days | 1% |
| braunweiler | 9/10 | 5838 days | 1% |
| pimn | 9/10 | 5843 days | 1% |
| asiacritics | 7/10 | 5849 days | 1% |
| Chris Mackamul | 8/10 | 5856 days | 1% |
| Debbie Rathbone | 10/10 | 5856 days | 1% |
| Lisette X | 9/10 | 5857 days | 1% |
| Martin | 10/10 | 5859 days | 1% |
| Thomas Willi | 10/10 | 5859 days | 1% |
| Elodie | 7/10 | 5860 days | 1% |
| richardh | 7/10 | 5974 days | 1% |
| trvlbug | 8/10 | 6002 days | 1% |
| glennandjen | 10/10 | 6063 days | 1% |
| BryonyS | 9/10 | 6081 days | 1% |
| Marion | 9/10 | 6097 days | 1% |
| Mikey | 7/10 | 6098 days | 1% |
| Richard Komzik | 6/10 | 6099 days | 1% |
| Michael Walsall | 10/10 | 6102 days | 1% |
| Anna | 8/10 | 6117 days | 1% |
| Abigail | 7/10 | 6117 days | 1% |
| lannie | 7/10 | 6126 days | 1% |
| SimonR | 8/10 | 6127 days | 1% |
| SonjaG | 7/10 | 6127 days | 1% |
| Chris | 8/10 | 6133 days | 1% |
| AurelieD | 8/10 | 6140 days | 1% |
| Yunker | 10/10 | 6141 days | 1% |
| Andrew | 8/10 | 6143 days | 1% |
| Erin | 9/10 | 6143 days | 1% |
| Christopher Gallaga | 8/10 | 6149 days | 1% |
| Amy | 10/10 | 6155 days | 1% |
| Shona | 8/10 | 6155 days | 1% |
| plumbaum | 9/10 | 6157 days | 1% |
| Sandra | 10/10 | 6165 days | 1% |
| Evangelista | 8/10 | 6165 days | 1% |
| Oliver | 5/10 | 6167 days | 1% |
| Kat | 9/10 | 6197 days | 1% |
| Lisa | 8/10 | 6224 days | 1% |
| siobhan | 8/10 | 6226 days | 1% |
| Alice | 8/10 | 6226 days | 1% |
| NORTZ | 7/10 | 6254 days | 1% |
| Stefan | 8/10 | 6256 days | 1% |
| Hugh Trenchard | 9/10 | 6272 days | 1% |
| Niamh | 4/10 | 6279 days | 1% |
| Jenny | 9/10 | 6303 days | 1% |
| Louise | 8/10 | 6312 days | 1% |
| Peddy | 10/10 | 6322 days | 1% |
| Katie Wise | 8/10 | 6325 days | 1% |
| Thomas Bachmann | 8/10 | 6341 days | 1% |
| Daniala | 8/10 | 6360 days | 1% |
| Tom Ben | 9/10 | 6464 days | 1% |
| Sarah Maudsley | 8/10 | 6479 days | 1% |
| Alan Bellerby | 8/10 | 6479 days | 1% |
| Tina Daly | 5/10 | 6485 days | 1% |
| John Woodrow | 8/10 | 6494 days | 1% |
| Ernst Seter | 9/10 | 6494 days | 1% |
| Jim Curley | 7/10 | 6505 days | 1% |
| Daniel | 7/10 | 6506 days | 1% |
| Marc Hertogs | 7/10 | 6509 days | 1% |
| Laura Sutton | 5/10 | 6533 days | 1% |
| Jeroen | 5/10 | 6535 days | 1% |
| Mum! | 6/10 | 6535 days | 1% |
| Gail | 9/10 | 6539 days | 1% |
| Heike Julia | 6/10 | 6540 days | 1% |
| Lanni | 8/10 | 6540 days | 1% |
| Amanda Finger | 7/10 | 6541 days | 1% |
| Desiree Muri | 7/10 | 6541 days | 1% |
| Jan Grzejik | 8/10 | 6568 days | 1% |
| Wouter Ewalts | 8/10 | 6575 days | 1% |
| Matilde | 6/10 | 6583 days | 1% |
| Kim | 6/10 | 6780 days | 1% |
| Gillian | 8/10 | 6822 days | 1% |
| Denise Nick | 6/10 | 6832 days | 1% |
| ranker_110 | 8/10 | 6851 days | 1% |
| Jasper | 7/10 | 6858 days | 1% |
| Mary | 8/10 | 6858 days | 1% |
| Lucy | 6/10 | 6858 days | 1% |
| Lukas | 8/10 | 6869 days | 1% |
| Hanna | 7/10 | 6871 days | 1% |
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 Waitomo 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 Waitomo 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 Waitomo 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
6.07% 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
78%
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.