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.
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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
75.59%
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 | 256 days | 100% |
| Anne | 7/10 | 591 days | 83% |
| ros fraser | 4/10 | 2601 days | 2% |
| wynden | 1/10 | 2629 days | 1% |
| Rado Hank | 10/10 | 2716 days | 3% |
| Lizzie Edmonds | 8/10 | 2717 days | 3% |
| Anis Quentin | 7/10 | 2724 days | 3% |
| Jeny Smolders | 7/10 | 2728 days | 3% |
| Oscar Petersen | 8/10 | 2735 days | 3% |
| Ani | 9/10 | 2844 days | 3% |
| Martin Murlik | 8/10 | 2956 days | 3% |
| Laura | 9/10 | 2967 days | 3% |
| Melanie Farrell | 7/10 | 2975 days | 3% |
| Andy | 10/10 | 2982 days | 3% |
| Julia Achatz | 5/10 | 2996 days | 2% |
| Auba Mateos | 7/10 | 3002 days | 3% |
| Charlotte | 7/10 | 3002 days | 3% |
| Isabel Zedelius | 8/10 | 3005 days | 3% |
| Dries | 8/10 | 3045 days | 3% |
| Clarissa Glaser | 8/10 | 3046 days | 3% |
| Alna | 10/10 | 3051 days | 3% |
| Holger Worner | 9/10 | 3051 days | 3% |
| Karlee Hormell | 9/10 | 3060 days | 3% |
| Alonso | 9/10 | 3064 days | 3% |
| Rose Guillaume | 8/10 | 3067 days | 3% |
| Caroline Coudray | 8/10 | 3071 days | 3% |
| Barbara | 8/10 | 3071 days | 3% |
| Leonie Brabers | 7/10 | 3079 days | 2% |
| Bina Johansson | 10/10 | 3079 days | 3% |
| Sam Staines | 9/10 | 3083 days | 3% |
| Erik | 6/10 | 3086 days | 2% |
| Nicole Signer | 8/10 | 3093 days | 2% |
| Sam Taylor | 7/10 | 3097 days | 2% |
| Vanuxem | 8/10 | 3301 days | 2% |
| Clara Bertomeu | 10/10 | 3301 days | 2% |
| Lukas Boller | 9/10 | 3303 days | 2% |
| Mette Elholm | 7/10 | 3317 days | 2% |
| Mathilde Arp | 8/10 | 3317 days | 2% |
| Chloe and Guillame | 9/10 | 3321 days | 2% |
| Andre | 9/10 | 3323 days | 2% |
| Doerte | 10/10 | 3323 days | 2% |
| Saskia Peek | 9/10 | 3324 days | 2% |
| Erika Tarant | 8/10 | 3324 days | 2% |
| Jennifer Nguyen | 7/10 | 3325 days | 2% |
| Julie Duvert | 7/10 | 3325 days | 2% |
| Dan Ramsl | 4/10 | 3325 days | 1% |
| Lucy Mulvin | 7/10 | 3326 days | 2% |
| Fine Kochling | 9/10 | 3328 days | 2% |
| Eberhard | 9/10 | 3328 days | 2% |
| Hannes | 8/10 | 3329 days | 2% |
| Calum Penn | 9/10 | 3331 days | 2% |
| Arthur Portolleau | 6/10 | 3332 days | 2% |
| Elisabet | 10/10 | 3333 days | 2% |
| Tommy Mannien | 8/10 | 3334 days | 2% |
| Solange Bourbeois | 8/10 | 3337 days | 2% |
| Talissa Missiato | 10/10 | 3337 days | 2% |
| Severin Knegsch | 9/10 | 3338 days | 2% |
| Pierre Jouffineau | 10/10 | 3339 days | 2% |
| Lewis Whittle | 8/10 | 3341 days | 2% |
| Ben and Pauline | 8/10 | 3343 days | 2% |
| Ann-Kathrin | 7/10 | 3348 days | 2% |
| Natasha Harbinson | 10/10 | 3349 days | 2% |
| Sebastian | 2/10 | 3350 days | 1% |
| Jaquein Bucholz | 3/10 | 3350 days | 1% |
| Chiara | 7/10 | 3350 days | 2% |
| Cariotta Kemper | 3/10 | 3350 days | 1% |
| Megan Lenox | 7/10 | 3353 days | 2% |
| Max Mustermann | 8/10 | 3355 days | 2% |
| Amy Stafford | 8/10 | 3358 days | 2% |
| Carl | 7/10 | 3358 days | 2% |
| Briony | 7/10 | 3360 days | 2% |
| Melanie Kronbichler | 8/10 | 3361 days | 2% |
| Andreas Schiefer | 7/10 | 3362 days | 2% |
| Veronique Kaplan | 3/10 | 3364 days | 1% |
| Robin Ings | 6/10 | 3365 days | 2% |
| Stula Vladimir | 7/10 | 3366 days | 2% |
| David Soukal | 8/10 | 3366 days | 2% |
| Olivia Aliprandi | 7/10 | 3367 days | 2% |
| Isabelle | 2/10 | 3369 days | 1% |
| Jonathan Gourmel | 8/10 | 3369 days | 2% |
| Mikkel Palleson | 4/10 | 3372 days | 1% |
| Franziska and Sabine | 7/10 | 3373 days | 2% |
| Chloe Guerillot | 7/10 | 3373 days | 2% |
| Faye Oliver | 7/10 | 3375 days | 2% |
| Iris Kerbler | 9/10 | 3375 days | 2% |
| Til Schaebitz | 6/10 | 3376 days | 2% |
| Elisabeth Grabner | 9/10 | 3378 days | 2% |
| Berith | 10/10 | 3378 days | 2% |
| Chris Simpson | 6/10 | 3381 days | 2% |
| Pekka and Jonna | 9/10 | 3381 days | 2% |
| Jonas Hoerning | 8/10 | 3382 days | 2% |
| Nils | 10/10 | 3382 days | 2% |
| Mark Rosema | 8/10 | 3383 days | 2% |
| Lisa Huber | 10/10 | 3383 days | 2% |
| Nicola Wiggan | 9/10 | 3404 days | 2% |
| Linda and Gunther | 4/10 | 3405 days | 1% |
| Julie | 9/10 | 3406 days | 2% |
| Maria Schaer | 7/10 | 3410 days | 2% |
| Mette and Jesper | 5/10 | 3412 days | 1% |
| Pierre and Alexandra | 6/10 | 3418 days | 2% |
| Julia Waenninger | 8/10 | 3430 days | 2% |
| Sarah Boettcher | 9/10 | 3466 days | 2% |
| Suzanne Vermeulen | 6/10 | 3483 days | 1% |
| Blandine Giusti | 7/10 | 3686 days | 1% |
| Bart Hanssen | 6/10 | 3765 days | 1% |
| Astrid Egesten | 7/10 | 3817 days | 1% |
| Jean Curry | 9/10 | 4040 days | 0% |
| Carla Oyarzun | 1/10 | 4044 days | 0% |
| Philippe Chiasson | 9/10 | 4050 days | 0% |
| Helma Druyken | 4/10 | 4060 days | 0% |
| Florian Guttler | 7/10 | 4063 days | 0% |
| Casandra Prunica | 8/10 | 4064 days | 0% |
| Lauren Hedley | 7/10 | 4064 days | 0% |
| Janina Zwerver | 8/10 | 4064 days | 0% |
| Marieke Feyteres | 4/10 | 4068 days | 0% |
| van Linda Werner | 5/10 | 4068 days | 0% |
| Philip Donachie | 7/10 | 4078 days | 0% |
| Luisa Bach | 8/10 | 4078 days | 0% |
| Kristina | 7/10 | 4080 days | 0% |
| Eugen Lehner | 6/10 | 4081 days | 0% |
| Manuel Bach | 7/10 | 4081 days | 0% |
| Matthias Freiling | 2/10 | 4088 days | 0% |
| Debora Grusler | 6/10 | 4091 days | 0% |
| Andreas Brodhaeker | 8/10 | 4104 days | 0% |
| Renee van der Syde | 7/10 | 4105 days | 0% |
| Martha Horst | 8/10 | 4105 days | 0% |
| Roland Beer | 7/10 | 4109 days | 0% |
| Johanna Bak | 4/10 | 4109 days | 0% |
| Lior Bakski | 9/10 | 4119 days | 0% |
| Bet | 9/10 | 4120 days | 0% |
| Memain | 8/10 | 4393 days | 1% |
| Konza | 7/10 | 4394 days | 1% |
| Steen Rausmussen | 8/10 | 4425 days | 1% |
| David Restell | 10/10 | 4455 days | 1% |
| Christina Rodewald | 9/10 | 4460 days | 1% |
| Hanneke P | 7/10 | 4486 days | 1% |
| Kohler | 9/10 | 4506 days | 1% |
| Alexandra van den Brack | 6/10 | 4514 days | 1% |
| Paul Lawrence | 9/10 | 4515 days | 1% |
| Abby Rushmer | 7/10 | 4516 days | 1% |
| Stephan Olivier | 7/10 | 4521 days | 1% |
| Stephan Olivier | 7/10 | 4521 days | 1% |
| Faassen | 8/10 | 4525 days | 1% |
| Julie Lamart | 8/10 | 4526 days | 1% |
| Adrian Weidell | 5/10 | 4722 days | 1% |
| Jonathan Tuthill | 9/10 | 4777 days | 1% |
| A Ormsby | 10/10 | 4789 days | 1% |
| Gillian Rowe | 10/10 | 4802 days | 1% |
| Ryan Pynappels | 8/10 | 4803 days | 1% |
| Peter Dellen | 8/10 | 4804 days | 1% |
| Jorg Steffens | 8/10 | 4804 days | 1% |
| Danielle & Jobbe | 9/10 | 4806 days | 1% |
| Christina | 6/10 | 4807 days | 1% |
| Jop Veldhuis | 7/10 | 4807 days | 1% |
| Paul Weidenfeld | 8/10 | 4808 days | 1% |
| Sophie Dorrepaal | 7/10 | 4808 days | 1% |
| Fannette Peyreplane | 5/10 | 4809 days | 1% |
| Norm Cooper | 7/10 | 4813 days | 1% |
| Gloria, Rose & An | 8/10 | 4813 days | 1% |
| A Sorg | 10/10 | 4813 days | 1% |
| Samplonius | 5/10 | 4816 days | 1% |
| Petra | 10/10 | 4816 days | 1% |
| Bethany Hamilton | 8/10 | 4820 days | 1% |
| suffolkhouse69 | 9/10 | 4821 days | 1% |
| a a | 8/10 | 4852 days | 1% |
| Julia Balionis | 7/10 | 4866 days | 1% |
| Julia Hartman | 3/10 | 4867 days | 0% |
| Fabienne Indergand | 7/10 | 4887 days | 1% |
| Waldemar Schuler | 9/10 | 4899 days | 1% |
| pepette31 | 7/10 | 4974 days | 1% |
| Craig Hathaway | 9/10 | 5126 days | 1% |
| Stephane Lebel | 9/10 | 5131 days | 1% |
| Rens Hemselmans | 7/10 | 5144 days | 1% |
| Isabell | 10/10 | 5146 days | 1% |
| Holly Cave | 5/10 | 5146 days | 1% |
| J Palmer | 6/10 | 5150 days | 1% |
| Liz & Jim | 10/10 | 5152 days | 1% |
| Edgar & Marilyn Berry | 9/10 | 5154 days | 1% |
| Simon Vickers | 2/10 | 5157 days | 0% |
| Leslie | 8/10 | 5170 days | 1% |
| Jean-Francois Guilbault | 8/10 | 5171 days | 1% |
| Selina Mueller | 7/10 | 5172 days | 1% |
| Tamlin Barton | 3/10 | 5173 days | 0% |
| Cara Dungay | 8/10 | 5174 days | 1% |
| Bottcher | 10/10 | 5174 days | 1% |
| Alexandra | 10/10 | 5175 days | 1% |
| Philipp Rau | 7/10 | 5177 days | 1% |
| Dan Aldridge | 9/10 | 5179 days | 1% |
| John Allen | 8/10 | 5181 days | 1% |
| Curtis Penner | 8/10 | 5181 days | 1% |
| Brandt | 8/10 | 5183 days | 1% |
| Nadia Husain | 5/10 | 5186 days | 1% |
| T J Andrews | 6/10 | 5202 days | 1% |
| Charli Skinner | 7/10 | 5453 days | 1% |
| Carl_Larsen | 10/10 | 5462 days | 1% |
| Susan & Richard | 10/10 | 5523 days | 1% |
| Rik | 9/10 | 5524 days | 1% |
| Jonathan Martin | 7/10 | 5526 days | 1% |
| Gunda G | 9/10 | 5531 days | 1% |
| Aaron | 8/10 | 5533 days | 1% |
| Will Jemma | 6/10 | 5536 days | 1% |
| Christen Hans | 10/10 | 5537 days | 1% |
| Monica and Danie. | 7/10 | 5545 days | 1% |
| Stephen | 5/10 | 5547 days | 1% |
| Susan | 10/10 | 5547 days | 1% |
| snodge | 8/10 | 5551 days | 1% |
| Bo Moenstead | 9/10 | 5560 days | 1% |
| Alain Deslandres | 8/10 | 5564 days | 1% |
| Jakob Jurgen | 10/10 | 5565 days | 1% |
| EA Anders | 8/10 | 5568 days | 1% |
| Helen and Hans Walser | 1/10 | 5571 days | 0% |
| kevinp | 8/10 | 5594 days | 1% |
| warrenp | 9/10 | 5598 days | 1% |
| braunweiler | 9/10 | 5602 days | 1% |
| pimn | 9/10 | 5607 days | 1% |
| asiacritics | 7/10 | 5613 days | 1% |
| Chris Mackamul | 8/10 | 5620 days | 1% |
| Debbie Rathbone | 10/10 | 5620 days | 1% |
| Lisette X | 9/10 | 5621 days | 1% |
| Martin | 10/10 | 5623 days | 1% |
| Thomas Willi | 10/10 | 5623 days | 1% |
| Elodie | 7/10 | 5624 days | 1% |
| richardh | 7/10 | 5738 days | 1% |
| trvlbug | 8/10 | 5766 days | 1% |
| glennandjen | 10/10 | 5827 days | 1% |
| BryonyS | 9/10 | 5845 days | 1% |
| Marion | 9/10 | 5861 days | 1% |
| Mikey | 7/10 | 5862 days | 1% |
| Richard Komzik | 6/10 | 5863 days | 1% |
| Michael Walsall | 10/10 | 5867 days | 1% |
| Anna | 8/10 | 5881 days | 1% |
| Abigail | 7/10 | 5881 days | 1% |
| lannie | 7/10 | 5890 days | 1% |
| SimonR | 8/10 | 5891 days | 1% |
| SonjaG | 7/10 | 5891 days | 1% |
| Chris | 8/10 | 5897 days | 1% |
| AurelieD | 8/10 | 5904 days | 1% |
| Yunker | 10/10 | 5905 days | 1% |
| Andrew | 8/10 | 5907 days | 1% |
| Erin | 9/10 | 5907 days | 1% |
| Christopher Gallaga | 8/10 | 5913 days | 1% |
| Amy | 10/10 | 5919 days | 1% |
| Shona | 8/10 | 5919 days | 1% |
| plumbaum | 9/10 | 5921 days | 1% |
| Sandra | 10/10 | 5929 days | 1% |
| Evangelista | 8/10 | 5929 days | 1% |
| Oliver | 5/10 | 5931 days | 1% |
| Kat | 9/10 | 5961 days | 1% |
| Lisa | 8/10 | 5988 days | 1% |
| siobhan | 8/10 | 5990 days | 1% |
| Alice | 8/10 | 5990 days | 1% |
| NORTZ | 7/10 | 6019 days | 1% |
| Stefan | 8/10 | 6021 days | 1% |
| Hugh Trenchard | 9/10 | 6037 days | 1% |
| Niamh | 4/10 | 6043 days | 0% |
| Jenny | 9/10 | 6067 days | 1% |
| Louise | 8/10 | 6076 days | 1% |
| Peddy | 10/10 | 6086 days | 1% |
| Katie Wise | 8/10 | 6089 days | 1% |
| Thomas Bachmann | 8/10 | 6105 days | 1% |
| Daniala | 8/10 | 6124 days | 1% |
| Tom Ben | 9/10 | 6228 days | 1% |
| Sarah Maudsley | 8/10 | 6243 days | 1% |
| Alan Bellerby | 8/10 | 6243 days | 1% |
| Tina Daly | 5/10 | 6249 days | 1% |
| John Woodrow | 8/10 | 6258 days | 1% |
| Ernst Seter | 9/10 | 6258 days | 1% |
| Jim Curley | 7/10 | 6269 days | 1% |
| Daniel | 7/10 | 6270 days | 1% |
| Marc Hertogs | 7/10 | 6273 days | 1% |
| Laura Sutton | 5/10 | 6297 days | 1% |
| Jeroen | 5/10 | 6299 days | 1% |
| Mum! | 6/10 | 6299 days | 1% |
| Gail | 9/10 | 6303 days | 1% |
| Heike Julia | 6/10 | 6304 days | 1% |
| Lanni | 8/10 | 6304 days | 1% |
| Amanda Finger | 7/10 | 6305 days | 1% |
| Desiree Muri | 7/10 | 6305 days | 1% |
| Jan Grzejik | 8/10 | 6332 days | 1% |
| Wouter Ewalts | 8/10 | 6339 days | 1% |
| Matilde | 6/10 | 6347 days | 1% |
| Kim | 6/10 | 6544 days | 1% |
| Gillian | 8/10 | 6586 days | 1% |
| Denise Nick | 6/10 | 6596 days | 1% |
| ranker_110 | 8/10 | 6615 days | 1% |
| Jasper | 7/10 | 6622 days | 1% |
| Mary | 8/10 | 6622 days | 1% |
| Lucy | 6/10 | 6622 days | 1% |
| Lukas | 8/10 | 6633 days | 1% |
| Hanna | 7/10 | 6635 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
-3.48% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 65 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 | -3.43% |
| 198 | -3.45% |
| 199 | -3.47% |
| 200 | -3.48% |
| 201 | -3.50% |
| 202 | -3.52% |
| 203 | -3.54% |
| … | … |
Balancing Adjustment
5.91% 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.