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 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
75.84%
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 | 682 days | 100% |
| Anne | 7/10 | 1017 days | 57% |
| ros fraser | 4/10 | 3027 days | 2% |
| wynden | 1/10 | 3055 days | 1% |
| Rado Hank | 10/10 | 3142 days | 3% |
| Lizzie Edmonds | 8/10 | 3143 days | 3% |
| Anis Quentin | 7/10 | 3150 days | 3% |
| Jeny Smolders | 7/10 | 3154 days | 3% |
| Oscar Petersen | 8/10 | 3161 days | 3% |
| Ani | 9/10 | 3269 days | 3% |
| Martin Murlik | 8/10 | 3382 days | 2% |
| Laura | 9/10 | 3393 days | 2% |
| Melanie Farrell | 7/10 | 3401 days | 2% |
| Andy | 10/10 | 3408 days | 2% |
| Julia Achatz | 5/10 | 3422 days | 2% |
| Auba Mateos | 7/10 | 3428 days | 2% |
| Charlotte | 7/10 | 3428 days | 2% |
| Isabel Zedelius | 8/10 | 3431 days | 2% |
| Dries | 8/10 | 3471 days | 2% |
| Clarissa Glaser | 8/10 | 3472 days | 2% |
| Alna | 10/10 | 3477 days | 2% |
| Holger Worner | 9/10 | 3477 days | 2% |
| Karlee Hormell | 9/10 | 3486 days | 2% |
| Alonso | 9/10 | 3490 days | 2% |
| Rose Guillaume | 8/10 | 3493 days | 2% |
| Caroline Coudray | 8/10 | 3497 days | 2% |
| Barbara | 8/10 | 3497 days | 2% |
| Leonie Brabers | 7/10 | 3505 days | 2% |
| Bina Johansson | 10/10 | 3505 days | 2% |
| Sam Staines | 9/10 | 3509 days | 2% |
| Erik | 6/10 | 3512 days | 2% |
| Nicole Signer | 8/10 | 3519 days | 2% |
| Sam Taylor | 7/10 | 3523 days | 2% |
| Vanuxem | 8/10 | 3727 days | 1% |
| Clara Bertomeu | 10/10 | 3727 days | 2% |
| Lukas Boller | 9/10 | 3729 days | 1% |
| Mette Elholm | 7/10 | 3743 days | 1% |
| Mathilde Arp | 8/10 | 3743 days | 1% |
| Chloe and Guillame | 9/10 | 3747 days | 1% |
| Andre | 9/10 | 3749 days | 1% |
| Doerte | 10/10 | 3749 days | 1% |
| Saskia Peek | 9/10 | 3750 days | 1% |
| Erika Tarant | 8/10 | 3750 days | 1% |
| Jennifer Nguyen | 7/10 | 3751 days | 1% |
| Julie Duvert | 7/10 | 3751 days | 1% |
| Dan Ramsl | 4/10 | 3751 days | 1% |
| Lucy Mulvin | 7/10 | 3752 days | 1% |
| Fine Kochling | 9/10 | 3754 days | 1% |
| Eberhard | 9/10 | 3754 days | 1% |
| Hannes | 8/10 | 3755 days | 1% |
| Calum Penn | 9/10 | 3757 days | 1% |
| Arthur Portolleau | 6/10 | 3758 days | 1% |
| Elisabet | 10/10 | 3759 days | 1% |
| Tommy Mannien | 8/10 | 3760 days | 1% |
| Solange Bourbeois | 8/10 | 3763 days | 1% |
| Talissa Missiato | 10/10 | 3763 days | 1% |
| Severin Knegsch | 9/10 | 3764 days | 1% |
| Pierre Jouffineau | 10/10 | 3765 days | 1% |
| Lewis Whittle | 8/10 | 3767 days | 1% |
| Ben and Pauline | 8/10 | 3769 days | 1% |
| Ann-Kathrin | 7/10 | 3774 days | 1% |
| Natasha Harbinson | 10/10 | 3775 days | 1% |
| Sebastian | 2/10 | 3776 days | 0% |
| Jaquein Bucholz | 3/10 | 3776 days | 1% |
| Chiara | 7/10 | 3776 days | 1% |
| Cariotta Kemper | 3/10 | 3776 days | 1% |
| Megan Lenox | 7/10 | 3779 days | 1% |
| Max Mustermann | 8/10 | 3781 days | 1% |
| Amy Stafford | 8/10 | 3784 days | 1% |
| Carl | 7/10 | 3784 days | 1% |
| Briony | 7/10 | 3786 days | 1% |
| Melanie Kronbichler | 8/10 | 3787 days | 1% |
| Andreas Schiefer | 7/10 | 3788 days | 1% |
| Veronique Kaplan | 3/10 | 3790 days | 1% |
| Robin Ings | 6/10 | 3791 days | 1% |
| Stula Vladimir | 7/10 | 3792 days | 1% |
| David Soukal | 8/10 | 3792 days | 1% |
| Olivia Aliprandi | 7/10 | 3793 days | 1% |
| Isabelle | 2/10 | 3795 days | 0% |
| Jonathan Gourmel | 8/10 | 3795 days | 1% |
| Mikkel Palleson | 4/10 | 3798 days | 1% |
| Franziska and Sabine | 7/10 | 3799 days | 1% |
| Chloe Guerillot | 7/10 | 3799 days | 1% |
| Faye Oliver | 7/10 | 3801 days | 1% |
| Iris Kerbler | 9/10 | 3801 days | 1% |
| Til Schaebitz | 6/10 | 3802 days | 1% |
| Elisabeth Grabner | 9/10 | 3804 days | 1% |
| Berith | 10/10 | 3804 days | 1% |
| Chris Simpson | 6/10 | 3807 days | 1% |
| Pekka and Jonna | 9/10 | 3807 days | 1% |
| Jonas Hoerning | 8/10 | 3808 days | 1% |
| Nils | 10/10 | 3808 days | 1% |
| Mark Rosema | 8/10 | 3809 days | 1% |
| Lisa Huber | 10/10 | 3809 days | 1% |
| Nicola Wiggan | 9/10 | 3830 days | 1% |
| Linda and Gunther | 4/10 | 3831 days | 1% |
| Julie | 9/10 | 3832 days | 1% |
| Maria Schaer | 7/10 | 3836 days | 1% |
| Mette and Jesper | 5/10 | 3838 days | 1% |
| Pierre and Alexandra | 6/10 | 3844 days | 1% |
| Julia Waenninger | 8/10 | 3856 days | 1% |
| Sarah Boettcher | 9/10 | 3892 days | 1% |
| Suzanne Vermeulen | 6/10 | 3909 days | 1% |
| Blandine Giusti | 7/10 | 4112 days | 0% |
| Bart Hanssen | 6/10 | 4191 days | 0% |
| Astrid Egesten | 7/10 | 4242 days | 0% |
| Jean Curry | 9/10 | 4466 days | 1% |
| Carla Oyarzun | 1/10 | 4470 days | 0% |
| Philippe Chiasson | 9/10 | 4476 days | 1% |
| Helma Druyken | 4/10 | 4486 days | 1% |
| Florian Guttler | 7/10 | 4489 days | 1% |
| Casandra Prunica | 8/10 | 4490 days | 1% |
| Lauren Hedley | 7/10 | 4490 days | 1% |
| Janina Zwerver | 8/10 | 4490 days | 1% |
| Marieke Feyteres | 4/10 | 4494 days | 1% |
| van Linda Werner | 5/10 | 4494 days | 1% |
| Philip Donachie | 7/10 | 4504 days | 1% |
| Luisa Bach | 8/10 | 4504 days | 1% |
| Kristina | 7/10 | 4506 days | 1% |
| Eugen Lehner | 6/10 | 4507 days | 1% |
| Manuel Bach | 7/10 | 4507 days | 1% |
| Matthias Freiling | 2/10 | 4514 days | 0% |
| Debora Grusler | 6/10 | 4517 days | 1% |
| Andreas Brodhaeker | 8/10 | 4530 days | 1% |
| Renee van der Syde | 7/10 | 4531 days | 1% |
| Martha Horst | 8/10 | 4531 days | 1% |
| Roland Beer | 7/10 | 4535 days | 1% |
| Johanna Bak | 4/10 | 4535 days | 1% |
| Lior Bakski | 9/10 | 4545 days | 1% |
| Bet | 9/10 | 4546 days | 1% |
| Memain | 8/10 | 4819 days | 1% |
| Konza | 7/10 | 4820 days | 1% |
| Steen Rausmussen | 8/10 | 4851 days | 1% |
| David Restell | 10/10 | 4881 days | 1% |
| Christina Rodewald | 9/10 | 4886 days | 1% |
| Hanneke P | 7/10 | 4912 days | 1% |
| Kohler | 9/10 | 4932 days | 1% |
| Alexandra van den Brack | 6/10 | 4940 days | 1% |
| Paul Lawrence | 9/10 | 4941 days | 1% |
| Abby Rushmer | 7/10 | 4942 days | 1% |
| Stephan Olivier | 7/10 | 4947 days | 1% |
| Stephan Olivier | 7/10 | 4947 days | 1% |
| Faassen | 8/10 | 4951 days | 1% |
| Julie Lamart | 8/10 | 4952 days | 1% |
| Adrian Weidell | 5/10 | 5148 days | 1% |
| Jonathan Tuthill | 9/10 | 5203 days | 1% |
| A Ormsby | 10/10 | 5215 days | 1% |
| Gillian Rowe | 10/10 | 5228 days | 1% |
| Ryan Pynappels | 8/10 | 5229 days | 1% |
| Peter Dellen | 8/10 | 5230 days | 1% |
| Jorg Steffens | 8/10 | 5230 days | 1% |
| Danielle & Jobbe | 9/10 | 5232 days | 1% |
| Christina | 6/10 | 5233 days | 1% |
| Jop Veldhuis | 7/10 | 5233 days | 1% |
| Paul Weidenfeld | 8/10 | 5234 days | 1% |
| Sophie Dorrepaal | 7/10 | 5234 days | 1% |
| Fannette Peyreplane | 5/10 | 5235 days | 1% |
| Norm Cooper | 7/10 | 5239 days | 1% |
| Gloria, Rose & An | 8/10 | 5239 days | 1% |
| A Sorg | 10/10 | 5239 days | 1% |
| Samplonius | 5/10 | 5242 days | 1% |
| Petra | 10/10 | 5242 days | 1% |
| Bethany Hamilton | 8/10 | 5246 days | 1% |
| suffolkhouse69 | 9/10 | 5247 days | 1% |
| a a | 8/10 | 5278 days | 1% |
| Julia Balionis | 7/10 | 5292 days | 1% |
| Julia Hartman | 3/10 | 5293 days | 0% |
| Fabienne Indergand | 7/10 | 5313 days | 1% |
| Waldemar Schuler | 9/10 | 5325 days | 1% |
| pepette31 | 7/10 | 5400 days | 1% |
| Craig Hathaway | 9/10 | 5552 days | 1% |
| Stephane Lebel | 9/10 | 5557 days | 1% |
| Rens Hemselmans | 7/10 | 5570 days | 1% |
| Isabell | 10/10 | 5572 days | 1% |
| Holly Cave | 5/10 | 5572 days | 1% |
| J Palmer | 6/10 | 5576 days | 1% |
| Liz & Jim | 10/10 | 5578 days | 1% |
| Edgar & Marilyn Berry | 9/10 | 5580 days | 1% |
| Simon Vickers | 2/10 | 5583 days | 0% |
| Leslie | 8/10 | 5596 days | 1% |
| Jean-Francois Guilbault | 8/10 | 5597 days | 1% |
| Selina Mueller | 7/10 | 5598 days | 1% |
| Tamlin Barton | 3/10 | 5599 days | 0% |
| Cara Dungay | 8/10 | 5600 days | 1% |
| Bottcher | 10/10 | 5600 days | 1% |
| Alexandra | 10/10 | 5601 days | 1% |
| Philipp Rau | 7/10 | 5603 days | 1% |
| Dan Aldridge | 9/10 | 5605 days | 1% |
| John Allen | 8/10 | 5607 days | 1% |
| Curtis Penner | 8/10 | 5607 days | 1% |
| Brandt | 8/10 | 5609 days | 1% |
| Nadia Husain | 5/10 | 5612 days | 1% |
| T J Andrews | 6/10 | 5628 days | 1% |
| Charli Skinner | 7/10 | 5879 days | 1% |
| Carl_Larsen | 10/10 | 5888 days | 1% |
| Susan & Richard | 10/10 | 5949 days | 1% |
| Rik | 9/10 | 5950 days | 1% |
| Jonathan Martin | 7/10 | 5952 days | 1% |
| Gunda G | 9/10 | 5957 days | 1% |
| Aaron | 8/10 | 5959 days | 1% |
| Will Jemma | 6/10 | 5962 days | 1% |
| Christen Hans | 10/10 | 5963 days | 1% |
| Monica and Danie. | 7/10 | 5971 days | 1% |
| Stephen | 5/10 | 5973 days | 1% |
| Susan | 10/10 | 5973 days | 1% |
| snodge | 8/10 | 5977 days | 1% |
| Bo Moenstead | 9/10 | 5986 days | 1% |
| Alain Deslandres | 8/10 | 5990 days | 1% |
| Jakob Jurgen | 10/10 | 5991 days | 1% |
| EA Anders | 8/10 | 5994 days | 1% |
| Helen and Hans Walser | 1/10 | 5997 days | 0% |
| kevinp | 8/10 | 6020 days | 1% |
| warrenp | 9/10 | 6024 days | 1% |
| braunweiler | 9/10 | 6028 days | 1% |
| pimn | 9/10 | 6033 days | 1% |
| asiacritics | 7/10 | 6039 days | 1% |
| Chris Mackamul | 8/10 | 6046 days | 1% |
| Debbie Rathbone | 10/10 | 6046 days | 1% |
| Lisette X | 9/10 | 6047 days | 1% |
| Martin | 10/10 | 6049 days | 1% |
| Thomas Willi | 10/10 | 6049 days | 1% |
| Elodie | 7/10 | 6050 days | 1% |
| richardh | 7/10 | 6164 days | 1% |
| trvlbug | 8/10 | 6192 days | 1% |
| glennandjen | 10/10 | 6253 days | 1% |
| BryonyS | 9/10 | 6271 days | 1% |
| Marion | 9/10 | 6287 days | 1% |
| Mikey | 7/10 | 6288 days | 1% |
| Richard Komzik | 6/10 | 6289 days | 1% |
| Michael Walsall | 10/10 | 6293 days | 1% |
| Anna | 8/10 | 6307 days | 1% |
| Abigail | 7/10 | 6307 days | 1% |
| lannie | 7/10 | 6316 days | 1% |
| SimonR | 8/10 | 6317 days | 1% |
| SonjaG | 7/10 | 6317 days | 1% |
| Chris | 8/10 | 6323 days | 1% |
| AurelieD | 8/10 | 6330 days | 1% |
| Yunker | 10/10 | 6331 days | 1% |
| Andrew | 8/10 | 6333 days | 1% |
| Erin | 9/10 | 6333 days | 1% |
| Christopher Gallaga | 8/10 | 6339 days | 1% |
| Amy | 10/10 | 6345 days | 1% |
| Shona | 8/10 | 6345 days | 1% |
| plumbaum | 9/10 | 6347 days | 1% |
| Sandra | 10/10 | 6355 days | 1% |
| Evangelista | 8/10 | 6355 days | 1% |
| Oliver | 5/10 | 6357 days | 1% |
| Kat | 9/10 | 6387 days | 1% |
| Lisa | 8/10 | 6414 days | 1% |
| siobhan | 8/10 | 6416 days | 1% |
| Alice | 8/10 | 6416 days | 1% |
| NORTZ | 7/10 | 6444 days | 1% |
| Stefan | 8/10 | 6446 days | 1% |
| Hugh Trenchard | 9/10 | 6463 days | 1% |
| Niamh | 4/10 | 6469 days | 1% |
| Jenny | 9/10 | 6493 days | 1% |
| Louise | 8/10 | 6502 days | 1% |
| Peddy | 10/10 | 6512 days | 1% |
| Katie Wise | 8/10 | 6515 days | 1% |
| Thomas Bachmann | 8/10 | 6531 days | 1% |
| Daniala | 8/10 | 6550 days | 1% |
| Tom Ben | 9/10 | 6654 days | 1% |
| Sarah Maudsley | 8/10 | 6669 days | 1% |
| Alan Bellerby | 8/10 | 6669 days | 1% |
| Tina Daly | 5/10 | 6675 days | 1% |
| John Woodrow | 8/10 | 6684 days | 1% |
| Ernst Seter | 9/10 | 6684 days | 1% |
| Jim Curley | 7/10 | 6695 days | 1% |
| Daniel | 7/10 | 6696 days | 1% |
| Marc Hertogs | 7/10 | 6699 days | 1% |
| Laura Sutton | 5/10 | 6723 days | 1% |
| Jeroen | 5/10 | 6725 days | 1% |
| Mum! | 6/10 | 6725 days | 1% |
| Gail | 9/10 | 6729 days | 1% |
| Heike Julia | 6/10 | 6730 days | 1% |
| Lanni | 8/10 | 6730 days | 1% |
| Amanda Finger | 7/10 | 6731 days | 1% |
| Desiree Muri | 7/10 | 6731 days | 1% |
| Jan Grzejik | 8/10 | 6758 days | 1% |
| Wouter Ewalts | 8/10 | 6765 days | 1% |
| Matilde | 6/10 | 6773 days | 1% |
| Kim | 6/10 | 6970 days | 1% |
| Gillian | 8/10 | 7012 days | 1% |
| Denise Nick | 6/10 | 7022 days | 1% |
| ranker_110 | 8/10 | 7041 days | 1% |
| Jasper | 7/10 | 7048 days | 1% |
| Mary | 8/10 | 7048 days | 1% |
| Lucy | 6/10 | 7048 days | 1% |
| Lukas | 8/10 | 7059 days | 1% |
| Hanna | 7/10 | 7061 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
-2.23% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 115 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 | -2.20% |
| 198 | -2.21% |
| 199 | -2.22% |
| 200 | -2.23% |
| 201 | -2.24% |
| 202 | -2.26% |
| 203 | -2.27% |
| … | … |
Balancing Adjustment
5.22% 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
79%
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.