Hey, 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 | 493 days | 100% |
| Anne | 7/10 | 828 days | 71% |
| ros fraser | 4/10 | 2839 days | 2% |
| wynden | 1/10 | 2867 days | 1% |
| Rado Hank | 10/10 | 2954 days | 3% |
| Lizzie Edmonds | 8/10 | 2955 days | 3% |
| Anis Quentin | 7/10 | 2962 days | 3% |
| Jeny Smolders | 7/10 | 2966 days | 3% |
| Oscar Petersen | 8/10 | 2973 days | 3% |
| Ani | 9/10 | 3081 days | 3% |
| Martin Murlik | 8/10 | 3194 days | 3% |
| Laura | 9/10 | 3205 days | 3% |
| Melanie Farrell | 7/10 | 3213 days | 3% |
| Andy | 10/10 | 3220 days | 3% |
| Julia Achatz | 5/10 | 3234 days | 2% |
| Auba Mateos | 7/10 | 3240 days | 3% |
| Charlotte | 7/10 | 3240 days | 3% |
| Isabel Zedelius | 8/10 | 3243 days | 3% |
| Dries | 8/10 | 3283 days | 3% |
| Clarissa Glaser | 8/10 | 3284 days | 3% |
| Alna | 10/10 | 3289 days | 3% |
| Holger Worner | 9/10 | 3289 days | 3% |
| Karlee Hormell | 9/10 | 3298 days | 3% |
| Alonso | 9/10 | 3302 days | 3% |
| Rose Guillaume | 8/10 | 3305 days | 3% |
| Caroline Coudray | 8/10 | 3309 days | 3% |
| Barbara | 8/10 | 3309 days | 3% |
| Leonie Brabers | 7/10 | 3317 days | 2% |
| Bina Johansson | 10/10 | 3317 days | 3% |
| Sam Staines | 9/10 | 3321 days | 3% |
| Erik | 6/10 | 3324 days | 2% |
| Nicole Signer | 8/10 | 3331 days | 2% |
| Sam Taylor | 7/10 | 3335 days | 2% |
| Vanuxem | 8/10 | 3539 days | 2% |
| Clara Bertomeu | 10/10 | 3539 days | 2% |
| Lukas Boller | 9/10 | 3541 days | 2% |
| Mette Elholm | 7/10 | 3555 days | 2% |
| Mathilde Arp | 8/10 | 3555 days | 2% |
| Chloe and Guillame | 9/10 | 3559 days | 2% |
| Andre | 9/10 | 3561 days | 2% |
| Doerte | 10/10 | 3561 days | 2% |
| Saskia Peek | 9/10 | 3562 days | 2% |
| Erika Tarant | 8/10 | 3562 days | 2% |
| Jennifer Nguyen | 7/10 | 3563 days | 2% |
| Julie Duvert | 7/10 | 3563 days | 2% |
| Dan Ramsl | 4/10 | 3563 days | 1% |
| Lucy Mulvin | 7/10 | 3564 days | 2% |
| Fine Kochling | 9/10 | 3566 days | 2% |
| Eberhard | 9/10 | 3566 days | 2% |
| Hannes | 8/10 | 3567 days | 2% |
| Calum Penn | 9/10 | 3569 days | 2% |
| Arthur Portolleau | 6/10 | 3570 days | 2% |
| Elisabet | 10/10 | 3571 days | 2% |
| Tommy Mannien | 8/10 | 3572 days | 2% |
| Solange Bourbeois | 8/10 | 3575 days | 2% |
| Talissa Missiato | 10/10 | 3575 days | 2% |
| Severin Knegsch | 9/10 | 3576 days | 2% |
| Pierre Jouffineau | 10/10 | 3577 days | 2% |
| Lewis Whittle | 8/10 | 3579 days | 2% |
| Ben and Pauline | 8/10 | 3581 days | 2% |
| Ann-Kathrin | 7/10 | 3586 days | 2% |
| Natasha Harbinson | 10/10 | 3587 days | 2% |
| Sebastian | 2/10 | 3588 days | 1% |
| Jaquein Bucholz | 3/10 | 3588 days | 1% |
| Chiara | 7/10 | 3588 days | 2% |
| Cariotta Kemper | 3/10 | 3588 days | 1% |
| Megan Lenox | 7/10 | 3591 days | 2% |
| Max Mustermann | 8/10 | 3593 days | 2% |
| Amy Stafford | 8/10 | 3596 days | 2% |
| Carl | 7/10 | 3596 days | 2% |
| Briony | 7/10 | 3598 days | 2% |
| Melanie Kronbichler | 8/10 | 3599 days | 2% |
| Andreas Schiefer | 7/10 | 3600 days | 2% |
| Veronique Kaplan | 3/10 | 3602 days | 1% |
| Robin Ings | 6/10 | 3603 days | 2% |
| Stula Vladimir | 7/10 | 3604 days | 2% |
| David Soukal | 8/10 | 3604 days | 2% |
| Olivia Aliprandi | 7/10 | 3605 days | 2% |
| Isabelle | 2/10 | 3607 days | 1% |
| Jonathan Gourmel | 8/10 | 3607 days | 2% |
| Mikkel Palleson | 4/10 | 3610 days | 1% |
| Franziska and Sabine | 7/10 | 3611 days | 2% |
| Chloe Guerillot | 7/10 | 3611 days | 2% |
| Faye Oliver | 7/10 | 3613 days | 2% |
| Iris Kerbler | 9/10 | 3613 days | 2% |
| Til Schaebitz | 6/10 | 3614 days | 2% |
| Elisabeth Grabner | 9/10 | 3616 days | 2% |
| Berith | 10/10 | 3616 days | 2% |
| Chris Simpson | 6/10 | 3619 days | 2% |
| Pekka and Jonna | 9/10 | 3619 days | 2% |
| Jonas Hoerning | 8/10 | 3620 days | 2% |
| Nils | 10/10 | 3620 days | 2% |
| Mark Rosema | 8/10 | 3621 days | 2% |
| Lisa Huber | 10/10 | 3621 days | 2% |
| Nicola Wiggan | 9/10 | 3642 days | 2% |
| Linda and Gunther | 4/10 | 3643 days | 1% |
| Julie | 9/10 | 3644 days | 2% |
| Maria Schaer | 7/10 | 3648 days | 2% |
| Mette and Jesper | 5/10 | 3650 days | 1% |
| Pierre and Alexandra | 6/10 | 3656 days | 1% |
| Julia Waenninger | 8/10 | 3668 days | 2% |
| Sarah Boettcher | 9/10 | 3704 days | 2% |
| Suzanne Vermeulen | 6/10 | 3721 days | 1% |
| Blandine Giusti | 7/10 | 3924 days | 1% |
| Bart Hanssen | 6/10 | 4003 days | 1% |
| Astrid Egesten | 7/10 | 4054 days | 1% |
| Jean Curry | 9/10 | 4278 days | 0% |
| Carla Oyarzun | 1/10 | 4282 days | 0% |
| Philippe Chiasson | 9/10 | 4288 days | 0% |
| Helma Druyken | 4/10 | 4298 days | 0% |
| Florian Guttler | 7/10 | 4301 days | 0% |
| Casandra Prunica | 8/10 | 4302 days | 0% |
| Lauren Hedley | 7/10 | 4302 days | 0% |
| Janina Zwerver | 8/10 | 4302 days | 0% |
| Marieke Feyteres | 4/10 | 4306 days | 0% |
| van Linda Werner | 5/10 | 4306 days | 0% |
| Philip Donachie | 7/10 | 4316 days | 0% |
| Luisa Bach | 8/10 | 4316 days | 0% |
| Kristina | 7/10 | 4318 days | 0% |
| Eugen Lehner | 6/10 | 4319 days | 0% |
| Manuel Bach | 7/10 | 4319 days | 0% |
| Matthias Freiling | 2/10 | 4326 days | 0% |
| Debora Grusler | 6/10 | 4329 days | 0% |
| Andreas Brodhaeker | 8/10 | 4342 days | 0% |
| Renee van der Syde | 7/10 | 4343 days | 0% |
| Martha Horst | 8/10 | 4343 days | 0% |
| Roland Beer | 7/10 | 4347 days | 0% |
| Johanna Bak | 4/10 | 4347 days | 0% |
| Lior Bakski | 9/10 | 4357 days | 0% |
| Bet | 9/10 | 4358 days | 0% |
| Memain | 8/10 | 4631 days | 1% |
| Konza | 7/10 | 4632 days | 1% |
| Steen Rausmussen | 8/10 | 4663 days | 1% |
| David Restell | 10/10 | 4693 days | 1% |
| Christina Rodewald | 9/10 | 4698 days | 1% |
| Hanneke P | 7/10 | 4724 days | 1% |
| Kohler | 9/10 | 4744 days | 1% |
| Alexandra van den Brack | 6/10 | 4752 days | 1% |
| Paul Lawrence | 9/10 | 4753 days | 1% |
| Abby Rushmer | 7/10 | 4754 days | 1% |
| Stephan Olivier | 7/10 | 4759 days | 1% |
| Stephan Olivier | 7/10 | 4759 days | 1% |
| Faassen | 8/10 | 4763 days | 1% |
| Julie Lamart | 8/10 | 4764 days | 1% |
| Adrian Weidell | 5/10 | 4959 days | 1% |
| Jonathan Tuthill | 9/10 | 5015 days | 1% |
| A Ormsby | 10/10 | 5027 days | 1% |
| Gillian Rowe | 10/10 | 5040 days | 1% |
| Ryan Pynappels | 8/10 | 5041 days | 1% |
| Peter Dellen | 8/10 | 5042 days | 1% |
| Jorg Steffens | 8/10 | 5042 days | 1% |
| Danielle & Jobbe | 9/10 | 5044 days | 1% |
| Christina | 6/10 | 5045 days | 1% |
| Jop Veldhuis | 7/10 | 5045 days | 1% |
| Paul Weidenfeld | 8/10 | 5046 days | 1% |
| Sophie Dorrepaal | 7/10 | 5046 days | 1% |
| Fannette Peyreplane | 5/10 | 5047 days | 1% |
| Norm Cooper | 7/10 | 5051 days | 1% |
| Gloria, Rose & An | 8/10 | 5051 days | 1% |
| A Sorg | 10/10 | 5051 days | 1% |
| Samplonius | 5/10 | 5054 days | 1% |
| Petra | 10/10 | 5054 days | 1% |
| Bethany Hamilton | 8/10 | 5058 days | 1% |
| suffolkhouse69 | 9/10 | 5059 days | 1% |
| a a | 8/10 | 5090 days | 1% |
| Julia Balionis | 7/10 | 5104 days | 1% |
| Julia Hartman | 3/10 | 5105 days | 1% |
| Fabienne Indergand | 7/10 | 5125 days | 1% |
| Waldemar Schuler | 9/10 | 5137 days | 1% |
| pepette31 | 7/10 | 5211 days | 1% |
| Craig Hathaway | 9/10 | 5364 days | 1% |
| Stephane Lebel | 9/10 | 5369 days | 1% |
| Rens Hemselmans | 7/10 | 5382 days | 1% |
| Isabell | 10/10 | 5384 days | 1% |
| Holly Cave | 5/10 | 5384 days | 1% |
| J Palmer | 6/10 | 5388 days | 1% |
| Liz & Jim | 10/10 | 5390 days | 1% |
| Edgar & Marilyn Berry | 9/10 | 5392 days | 1% |
| Simon Vickers | 2/10 | 5395 days | 1% |
| Leslie | 8/10 | 5408 days | 1% |
| Jean-Francois Guilbault | 8/10 | 5409 days | 1% |
| Selina Mueller | 7/10 | 5410 days | 1% |
| Tamlin Barton | 3/10 | 5411 days | 1% |
| Cara Dungay | 8/10 | 5412 days | 1% |
| Bottcher | 10/10 | 5412 days | 1% |
| Alexandra | 10/10 | 5413 days | 1% |
| Philipp Rau | 7/10 | 5415 days | 1% |
| Dan Aldridge | 9/10 | 5417 days | 1% |
| John Allen | 8/10 | 5419 days | 1% |
| Curtis Penner | 8/10 | 5419 days | 1% |
| Brandt | 8/10 | 5421 days | 1% |
| Nadia Husain | 5/10 | 5424 days | 1% |
| T J Andrews | 6/10 | 5440 days | 1% |
| Charli Skinner | 7/10 | 5690 days | 1% |
| Carl_Larsen | 10/10 | 5699 days | 1% |
| Susan & Richard | 10/10 | 5761 days | 1% |
| Rik | 9/10 | 5762 days | 1% |
| Jonathan Martin | 7/10 | 5764 days | 1% |
| Gunda G | 9/10 | 5769 days | 1% |
| Aaron | 8/10 | 5771 days | 1% |
| Will Jemma | 6/10 | 5774 days | 1% |
| Christen Hans | 10/10 | 5775 days | 1% |
| Monica and Danie. | 7/10 | 5783 days | 1% |
| Stephen | 5/10 | 5785 days | 1% |
| Susan | 10/10 | 5785 days | 1% |
| snodge | 8/10 | 5789 days | 1% |
| Bo Moenstead | 9/10 | 5798 days | 1% |
| Alain Deslandres | 8/10 | 5802 days | 1% |
| Jakob Jurgen | 10/10 | 5803 days | 1% |
| EA Anders | 8/10 | 5806 days | 1% |
| Helen and Hans Walser | 1/10 | 5809 days | 0% |
| kevinp | 8/10 | 5832 days | 1% |
| warrenp | 9/10 | 5836 days | 1% |
| braunweiler | 9/10 | 5840 days | 1% |
| pimn | 9/10 | 5845 days | 1% |
| asiacritics | 7/10 | 5851 days | 1% |
| Chris Mackamul | 8/10 | 5858 days | 1% |
| Debbie Rathbone | 10/10 | 5858 days | 1% |
| Lisette X | 9/10 | 5859 days | 1% |
| Martin | 10/10 | 5861 days | 1% |
| Thomas Willi | 10/10 | 5861 days | 1% |
| Elodie | 7/10 | 5862 days | 1% |
| richardh | 7/10 | 5975 days | 1% |
| trvlbug | 8/10 | 6003 days | 1% |
| glennandjen | 10/10 | 6064 days | 1% |
| BryonyS | 9/10 | 6082 days | 1% |
| Marion | 9/10 | 6099 days | 1% |
| Mikey | 7/10 | 6100 days | 1% |
| Richard Komzik | 6/10 | 6101 days | 1% |
| Michael Walsall | 10/10 | 6104 days | 1% |
| Anna | 8/10 | 6119 days | 1% |
| Abigail | 7/10 | 6119 days | 1% |
| lannie | 7/10 | 6128 days | 1% |
| SimonR | 8/10 | 6129 days | 1% |
| SonjaG | 7/10 | 6129 days | 1% |
| Chris | 8/10 | 6135 days | 1% |
| AurelieD | 8/10 | 6142 days | 1% |
| Yunker | 10/10 | 6143 days | 1% |
| Andrew | 8/10 | 6145 days | 1% |
| Erin | 9/10 | 6145 days | 1% |
| Christopher Gallaga | 8/10 | 6151 days | 1% |
| Amy | 10/10 | 6157 days | 1% |
| Shona | 8/10 | 6157 days | 1% |
| plumbaum | 9/10 | 6159 days | 1% |
| Sandra | 10/10 | 6167 days | 1% |
| Evangelista | 8/10 | 6167 days | 1% |
| Oliver | 5/10 | 6169 days | 1% |
| Kat | 9/10 | 6199 days | 1% |
| Lisa | 8/10 | 6226 days | 1% |
| siobhan | 8/10 | 6228 days | 1% |
| Alice | 8/10 | 6228 days | 1% |
| NORTZ | 7/10 | 6256 days | 1% |
| Stefan | 8/10 | 6258 days | 1% |
| Hugh Trenchard | 9/10 | 6274 days | 1% |
| Niamh | 4/10 | 6281 days | 1% |
| Jenny | 9/10 | 6305 days | 1% |
| Louise | 8/10 | 6314 days | 1% |
| Peddy | 10/10 | 6324 days | 1% |
| Katie Wise | 8/10 | 6327 days | 1% |
| Thomas Bachmann | 8/10 | 6343 days | 1% |
| Daniala | 8/10 | 6362 days | 1% |
| Tom Ben | 9/10 | 6466 days | 1% |
| Sarah Maudsley | 8/10 | 6481 days | 1% |
| Alan Bellerby | 8/10 | 6481 days | 1% |
| Tina Daly | 5/10 | 6487 days | 1% |
| John Woodrow | 8/10 | 6496 days | 1% |
| Ernst Seter | 9/10 | 6496 days | 1% |
| Jim Curley | 7/10 | 6507 days | 1% |
| Daniel | 7/10 | 6508 days | 1% |
| Marc Hertogs | 7/10 | 6511 days | 1% |
| Laura Sutton | 5/10 | 6535 days | 1% |
| Jeroen | 5/10 | 6537 days | 1% |
| Mum! | 6/10 | 6537 days | 1% |
| Gail | 9/10 | 6541 days | 1% |
| Heike Julia | 6/10 | 6542 days | 1% |
| Lanni | 8/10 | 6542 days | 1% |
| Amanda Finger | 7/10 | 6543 days | 1% |
| Desiree Muri | 7/10 | 6543 days | 1% |
| Jan Grzejik | 8/10 | 6570 days | 1% |
| Wouter Ewalts | 8/10 | 6577 days | 1% |
| Matilde | 6/10 | 6585 days | 1% |
| Kim | 6/10 | 6781 days | 1% |
| Gillian | 8/10 | 6823 days | 1% |
| Denise Nick | 6/10 | 6833 days | 1% |
| ranker_110 | 8/10 | 6853 days | 1% |
| Jasper | 7/10 | 6860 days | 1% |
| Mary | 8/10 | 6860 days | 1% |
| Lucy | 6/10 | 6860 days | 1% |
| Lukas | 8/10 | 6871 days | 1% |
| Hanna | 7/10 | 6873 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
6.06% 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.