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 | 680 days | 100% |
| Anne | 7/10 | 1015 days | 57% |
| ros fraser | 4/10 | 3025 days | 2% |
| wynden | 1/10 | 3053 days | 1% |
| Rado Hank | 10/10 | 3140 days | 3% |
| Lizzie Edmonds | 8/10 | 3141 days | 3% |
| Anis Quentin | 7/10 | 3148 days | 3% |
| Jeny Smolders | 7/10 | 3152 days | 3% |
| Oscar Petersen | 8/10 | 3159 days | 3% |
| Ani | 9/10 | 3267 days | 3% |
| Martin Murlik | 8/10 | 3380 days | 2% |
| Laura | 9/10 | 3391 days | 2% |
| Melanie Farrell | 7/10 | 3399 days | 2% |
| Andy | 10/10 | 3406 days | 2% |
| Julia Achatz | 5/10 | 3420 days | 2% |
| Auba Mateos | 7/10 | 3426 days | 2% |
| Charlotte | 7/10 | 3426 days | 2% |
| Isabel Zedelius | 8/10 | 3429 days | 2% |
| Dries | 8/10 | 3469 days | 2% |
| Clarissa Glaser | 8/10 | 3470 days | 2% |
| Alna | 10/10 | 3475 days | 2% |
| Holger Worner | 9/10 | 3475 days | 2% |
| Karlee Hormell | 9/10 | 3484 days | 2% |
| Alonso | 9/10 | 3488 days | 2% |
| Rose Guillaume | 8/10 | 3491 days | 2% |
| Caroline Coudray | 8/10 | 3495 days | 2% |
| Barbara | 8/10 | 3495 days | 2% |
| Leonie Brabers | 7/10 | 3503 days | 2% |
| Bina Johansson | 10/10 | 3503 days | 2% |
| Sam Staines | 9/10 | 3507 days | 2% |
| Erik | 6/10 | 3510 days | 2% |
| Nicole Signer | 8/10 | 3517 days | 2% |
| Sam Taylor | 7/10 | 3521 days | 2% |
| Vanuxem | 8/10 | 3725 days | 1% |
| Clara Bertomeu | 10/10 | 3725 days | 2% |
| Lukas Boller | 9/10 | 3727 days | 1% |
| Mette Elholm | 7/10 | 3741 days | 1% |
| Mathilde Arp | 8/10 | 3741 days | 1% |
| Chloe and Guillame | 9/10 | 3745 days | 1% |
| Andre | 9/10 | 3747 days | 1% |
| Doerte | 10/10 | 3747 days | 1% |
| Saskia Peek | 9/10 | 3748 days | 1% |
| Erika Tarant | 8/10 | 3748 days | 1% |
| Jennifer Nguyen | 7/10 | 3749 days | 1% |
| Julie Duvert | 7/10 | 3749 days | 1% |
| Dan Ramsl | 4/10 | 3749 days | 1% |
| Lucy Mulvin | 7/10 | 3750 days | 1% |
| Fine Kochling | 9/10 | 3752 days | 1% |
| Eberhard | 9/10 | 3752 days | 1% |
| Hannes | 8/10 | 3753 days | 1% |
| Calum Penn | 9/10 | 3755 days | 1% |
| Arthur Portolleau | 6/10 | 3756 days | 1% |
| Elisabet | 10/10 | 3757 days | 1% |
| Tommy Mannien | 8/10 | 3758 days | 1% |
| Solange Bourbeois | 8/10 | 3761 days | 1% |
| Talissa Missiato | 10/10 | 3761 days | 1% |
| Severin Knegsch | 9/10 | 3762 days | 1% |
| Pierre Jouffineau | 10/10 | 3763 days | 1% |
| Lewis Whittle | 8/10 | 3765 days | 1% |
| Ben and Pauline | 8/10 | 3767 days | 1% |
| Ann-Kathrin | 7/10 | 3772 days | 1% |
| Natasha Harbinson | 10/10 | 3773 days | 1% |
| Sebastian | 2/10 | 3774 days | 0% |
| Jaquein Bucholz | 3/10 | 3774 days | 1% |
| Chiara | 7/10 | 3774 days | 1% |
| Cariotta Kemper | 3/10 | 3774 days | 1% |
| Megan Lenox | 7/10 | 3777 days | 1% |
| Max Mustermann | 8/10 | 3779 days | 1% |
| Amy Stafford | 8/10 | 3782 days | 1% |
| Carl | 7/10 | 3782 days | 1% |
| Briony | 7/10 | 3784 days | 1% |
| Melanie Kronbichler | 8/10 | 3785 days | 1% |
| Andreas Schiefer | 7/10 | 3786 days | 1% |
| Veronique Kaplan | 3/10 | 3788 days | 1% |
| Robin Ings | 6/10 | 3789 days | 1% |
| Stula Vladimir | 7/10 | 3790 days | 1% |
| David Soukal | 8/10 | 3790 days | 1% |
| Olivia Aliprandi | 7/10 | 3791 days | 1% |
| Isabelle | 2/10 | 3793 days | 0% |
| Jonathan Gourmel | 8/10 | 3793 days | 1% |
| Mikkel Palleson | 4/10 | 3796 days | 1% |
| Franziska and Sabine | 7/10 | 3797 days | 1% |
| Chloe Guerillot | 7/10 | 3797 days | 1% |
| Faye Oliver | 7/10 | 3799 days | 1% |
| Iris Kerbler | 9/10 | 3799 days | 1% |
| Til Schaebitz | 6/10 | 3800 days | 1% |
| Elisabeth Grabner | 9/10 | 3802 days | 1% |
| Berith | 10/10 | 3802 days | 1% |
| Chris Simpson | 6/10 | 3805 days | 1% |
| Pekka and Jonna | 9/10 | 3805 days | 1% |
| Jonas Hoerning | 8/10 | 3806 days | 1% |
| Nils | 10/10 | 3806 days | 1% |
| Mark Rosema | 8/10 | 3807 days | 1% |
| Lisa Huber | 10/10 | 3807 days | 1% |
| Nicola Wiggan | 9/10 | 3828 days | 1% |
| Linda and Gunther | 4/10 | 3829 days | 1% |
| Julie | 9/10 | 3830 days | 1% |
| Maria Schaer | 7/10 | 3834 days | 1% |
| Mette and Jesper | 5/10 | 3836 days | 1% |
| Pierre and Alexandra | 6/10 | 3842 days | 1% |
| Julia Waenninger | 8/10 | 3854 days | 1% |
| Sarah Boettcher | 9/10 | 3890 days | 1% |
| Suzanne Vermeulen | 6/10 | 3907 days | 1% |
| Blandine Giusti | 7/10 | 4110 days | 0% |
| Bart Hanssen | 6/10 | 4189 days | 0% |
| Astrid Egesten | 7/10 | 4240 days | 0% |
| Jean Curry | 9/10 | 4464 days | 1% |
| Carla Oyarzun | 1/10 | 4468 days | 0% |
| Philippe Chiasson | 9/10 | 4474 days | 1% |
| Helma Druyken | 4/10 | 4484 days | 1% |
| Florian Guttler | 7/10 | 4487 days | 1% |
| Casandra Prunica | 8/10 | 4488 days | 1% |
| Lauren Hedley | 7/10 | 4488 days | 1% |
| Janina Zwerver | 8/10 | 4488 days | 1% |
| Marieke Feyteres | 4/10 | 4492 days | 1% |
| van Linda Werner | 5/10 | 4492 days | 1% |
| Philip Donachie | 7/10 | 4502 days | 1% |
| Luisa Bach | 8/10 | 4502 days | 1% |
| Kristina | 7/10 | 4504 days | 1% |
| Eugen Lehner | 6/10 | 4505 days | 1% |
| Manuel Bach | 7/10 | 4505 days | 1% |
| Matthias Freiling | 2/10 | 4512 days | 0% |
| Debora Grusler | 6/10 | 4515 days | 1% |
| Andreas Brodhaeker | 8/10 | 4528 days | 1% |
| Renee van der Syde | 7/10 | 4529 days | 1% |
| Martha Horst | 8/10 | 4529 days | 1% |
| Roland Beer | 7/10 | 4533 days | 1% |
| Johanna Bak | 4/10 | 4533 days | 1% |
| Lior Bakski | 9/10 | 4543 days | 1% |
| Bet | 9/10 | 4544 days | 1% |
| Memain | 8/10 | 4817 days | 1% |
| Konza | 7/10 | 4818 days | 1% |
| Steen Rausmussen | 8/10 | 4849 days | 1% |
| David Restell | 10/10 | 4879 days | 1% |
| Christina Rodewald | 9/10 | 4884 days | 1% |
| Hanneke P | 7/10 | 4910 days | 1% |
| Kohler | 9/10 | 4930 days | 1% |
| Alexandra van den Brack | 6/10 | 4938 days | 1% |
| Paul Lawrence | 9/10 | 4939 days | 1% |
| Abby Rushmer | 7/10 | 4940 days | 1% |
| Stephan Olivier | 7/10 | 4945 days | 1% |
| Stephan Olivier | 7/10 | 4945 days | 1% |
| Faassen | 8/10 | 4949 days | 1% |
| Julie Lamart | 8/10 | 4950 days | 1% |
| Adrian Weidell | 5/10 | 5146 days | 1% |
| Jonathan Tuthill | 9/10 | 5201 days | 1% |
| A Ormsby | 10/10 | 5213 days | 1% |
| Gillian Rowe | 10/10 | 5226 days | 1% |
| Ryan Pynappels | 8/10 | 5227 days | 1% |
| Peter Dellen | 8/10 | 5228 days | 1% |
| Jorg Steffens | 8/10 | 5228 days | 1% |
| Danielle & Jobbe | 9/10 | 5230 days | 1% |
| Christina | 6/10 | 5231 days | 1% |
| Jop Veldhuis | 7/10 | 5231 days | 1% |
| Paul Weidenfeld | 8/10 | 5232 days | 1% |
| Sophie Dorrepaal | 7/10 | 5232 days | 1% |
| Fannette Peyreplane | 5/10 | 5233 days | 1% |
| Norm Cooper | 7/10 | 5237 days | 1% |
| Gloria, Rose & An | 8/10 | 5237 days | 1% |
| A Sorg | 10/10 | 5237 days | 1% |
| Samplonius | 5/10 | 5240 days | 1% |
| Petra | 10/10 | 5240 days | 1% |
| Bethany Hamilton | 8/10 | 5244 days | 1% |
| suffolkhouse69 | 9/10 | 5245 days | 1% |
| a a | 8/10 | 5276 days | 1% |
| Julia Balionis | 7/10 | 5290 days | 1% |
| Julia Hartman | 3/10 | 5291 days | 0% |
| Fabienne Indergand | 7/10 | 5311 days | 1% |
| Waldemar Schuler | 9/10 | 5323 days | 1% |
| pepette31 | 7/10 | 5398 days | 1% |
| Craig Hathaway | 9/10 | 5550 days | 1% |
| Stephane Lebel | 9/10 | 5555 days | 1% |
| Rens Hemselmans | 7/10 | 5568 days | 1% |
| Isabell | 10/10 | 5570 days | 1% |
| Holly Cave | 5/10 | 5570 days | 1% |
| J Palmer | 6/10 | 5574 days | 1% |
| Liz & Jim | 10/10 | 5576 days | 1% |
| Edgar & Marilyn Berry | 9/10 | 5578 days | 1% |
| Simon Vickers | 2/10 | 5581 days | 0% |
| Leslie | 8/10 | 5594 days | 1% |
| Jean-Francois Guilbault | 8/10 | 5595 days | 1% |
| Selina Mueller | 7/10 | 5596 days | 1% |
| Tamlin Barton | 3/10 | 5597 days | 0% |
| Cara Dungay | 8/10 | 5598 days | 1% |
| Bottcher | 10/10 | 5598 days | 1% |
| Alexandra | 10/10 | 5599 days | 1% |
| Philipp Rau | 7/10 | 5601 days | 1% |
| Dan Aldridge | 9/10 | 5603 days | 1% |
| John Allen | 8/10 | 5605 days | 1% |
| Curtis Penner | 8/10 | 5605 days | 1% |
| Brandt | 8/10 | 5607 days | 1% |
| Nadia Husain | 5/10 | 5610 days | 1% |
| T J Andrews | 6/10 | 5626 days | 1% |
| Charli Skinner | 7/10 | 5877 days | 1% |
| Carl_Larsen | 10/10 | 5886 days | 1% |
| Susan & Richard | 10/10 | 5947 days | 1% |
| Rik | 9/10 | 5948 days | 1% |
| Jonathan Martin | 7/10 | 5950 days | 1% |
| Gunda G | 9/10 | 5955 days | 1% |
| Aaron | 8/10 | 5957 days | 1% |
| Will Jemma | 6/10 | 5960 days | 1% |
| Christen Hans | 10/10 | 5961 days | 1% |
| Monica and Danie. | 7/10 | 5969 days | 1% |
| Stephen | 5/10 | 5971 days | 1% |
| Susan | 10/10 | 5971 days | 1% |
| snodge | 8/10 | 5975 days | 1% |
| Bo Moenstead | 9/10 | 5984 days | 1% |
| Alain Deslandres | 8/10 | 5988 days | 1% |
| Jakob Jurgen | 10/10 | 5989 days | 1% |
| EA Anders | 8/10 | 5992 days | 1% |
| Helen and Hans Walser | 1/10 | 5995 days | 0% |
| kevinp | 8/10 | 6018 days | 1% |
| warrenp | 9/10 | 6022 days | 1% |
| braunweiler | 9/10 | 6026 days | 1% |
| pimn | 9/10 | 6031 days | 1% |
| asiacritics | 7/10 | 6037 days | 1% |
| Chris Mackamul | 8/10 | 6044 days | 1% |
| Debbie Rathbone | 10/10 | 6044 days | 1% |
| Lisette X | 9/10 | 6045 days | 1% |
| Martin | 10/10 | 6047 days | 1% |
| Thomas Willi | 10/10 | 6047 days | 1% |
| Elodie | 7/10 | 6048 days | 1% |
| richardh | 7/10 | 6162 days | 1% |
| trvlbug | 8/10 | 6190 days | 1% |
| glennandjen | 10/10 | 6251 days | 1% |
| BryonyS | 9/10 | 6269 days | 1% |
| Marion | 9/10 | 6285 days | 1% |
| Mikey | 7/10 | 6286 days | 1% |
| Richard Komzik | 6/10 | 6287 days | 1% |
| Michael Walsall | 10/10 | 6291 days | 1% |
| Anna | 8/10 | 6305 days | 1% |
| Abigail | 7/10 | 6305 days | 1% |
| lannie | 7/10 | 6314 days | 1% |
| SimonR | 8/10 | 6315 days | 1% |
| SonjaG | 7/10 | 6315 days | 1% |
| Chris | 8/10 | 6321 days | 1% |
| AurelieD | 8/10 | 6328 days | 1% |
| Yunker | 10/10 | 6329 days | 1% |
| Andrew | 8/10 | 6331 days | 1% |
| Erin | 9/10 | 6331 days | 1% |
| Christopher Gallaga | 8/10 | 6337 days | 1% |
| Amy | 10/10 | 6343 days | 1% |
| Shona | 8/10 | 6343 days | 1% |
| plumbaum | 9/10 | 6345 days | 1% |
| Sandra | 10/10 | 6353 days | 1% |
| Evangelista | 8/10 | 6353 days | 1% |
| Oliver | 5/10 | 6355 days | 1% |
| Kat | 9/10 | 6385 days | 1% |
| Lisa | 8/10 | 6412 days | 1% |
| siobhan | 8/10 | 6414 days | 1% |
| Alice | 8/10 | 6414 days | 1% |
| NORTZ | 7/10 | 6442 days | 1% |
| Stefan | 8/10 | 6445 days | 1% |
| Hugh Trenchard | 9/10 | 6461 days | 1% |
| Niamh | 4/10 | 6467 days | 1% |
| Jenny | 9/10 | 6491 days | 1% |
| Louise | 8/10 | 6500 days | 1% |
| Peddy | 10/10 | 6510 days | 1% |
| Katie Wise | 8/10 | 6513 days | 1% |
| Thomas Bachmann | 8/10 | 6529 days | 1% |
| Daniala | 8/10 | 6548 days | 1% |
| Tom Ben | 9/10 | 6652 days | 1% |
| Sarah Maudsley | 8/10 | 6667 days | 1% |
| Alan Bellerby | 8/10 | 6667 days | 1% |
| Tina Daly | 5/10 | 6673 days | 1% |
| John Woodrow | 8/10 | 6682 days | 1% |
| Ernst Seter | 9/10 | 6682 days | 1% |
| Jim Curley | 7/10 | 6693 days | 1% |
| Daniel | 7/10 | 6694 days | 1% |
| Marc Hertogs | 7/10 | 6697 days | 1% |
| Laura Sutton | 5/10 | 6721 days | 1% |
| Jeroen | 5/10 | 6723 days | 1% |
| Mum! | 6/10 | 6723 days | 1% |
| Gail | 9/10 | 6727 days | 1% |
| Heike Julia | 6/10 | 6728 days | 1% |
| Lanni | 8/10 | 6728 days | 1% |
| Amanda Finger | 7/10 | 6729 days | 1% |
| Desiree Muri | 7/10 | 6729 days | 1% |
| Jan Grzejik | 8/10 | 6756 days | 1% |
| Wouter Ewalts | 8/10 | 6763 days | 1% |
| Matilde | 6/10 | 6771 days | 1% |
| Kim | 6/10 | 6968 days | 1% |
| Gillian | 8/10 | 7010 days | 1% |
| Denise Nick | 6/10 | 7020 days | 1% |
| ranker_110 | 8/10 | 7039 days | 1% |
| Jasper | 7/10 | 7046 days | 1% |
| Mary | 8/10 | 7046 days | 1% |
| Lucy | 6/10 | 7046 days | 1% |
| Lukas | 8/10 | 7057 days | 1% |
| Hanna | 7/10 | 7059 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
-2.26% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 114 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 | -2.23% |
| 198 | -2.24% |
| 199 | -2.25% |
| 200 | -2.26% |
| 201 | -2.27% |
| 202 | -2.29% |
| 203 | -2.30% |
| … | … |
Balancing Adjustment
5.23% 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.