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
75.57%
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 | 215 days | 100% |
| Anne | 7/10 | 550 days | 85% |
| ros fraser | 4/10 | 2560 days | 3% |
| wynden | 1/10 | 2588 days | 2% |
| Rado Hank | 10/10 | 2675 days | 4% |
| Lizzie Edmonds | 8/10 | 2676 days | 4% |
| Anis Quentin | 7/10 | 2683 days | 3% |
| Jeny Smolders | 7/10 | 2687 days | 3% |
| Oscar Petersen | 8/10 | 2694 days | 4% |
| Ani | 9/10 | 2802 days | 3% |
| Martin Murlik | 8/10 | 2915 days | 3% |
| Laura | 9/10 | 2926 days | 3% |
| Melanie Farrell | 7/10 | 2934 days | 3% |
| Andy | 10/10 | 2941 days | 3% |
| Julia Achatz | 5/10 | 2955 days | 2% |
| Auba Mateos | 7/10 | 2961 days | 3% |
| Charlotte | 7/10 | 2961 days | 3% |
| Isabel Zedelius | 8/10 | 2964 days | 3% |
| Dries | 8/10 | 3004 days | 3% |
| Clarissa Glaser | 8/10 | 3005 days | 3% |
| Alna | 10/10 | 3010 days | 3% |
| Holger Worner | 9/10 | 3010 days | 3% |
| Karlee Hormell | 9/10 | 3019 days | 3% |
| Alonso | 9/10 | 3023 days | 3% |
| Rose Guillaume | 8/10 | 3026 days | 3% |
| Caroline Coudray | 8/10 | 3030 days | 3% |
| Barbara | 8/10 | 3030 days | 3% |
| Leonie Brabers | 7/10 | 3038 days | 3% |
| Bina Johansson | 10/10 | 3038 days | 3% |
| Sam Staines | 9/10 | 3042 days | 3% |
| Erik | 6/10 | 3045 days | 2% |
| Nicole Signer | 8/10 | 3052 days | 3% |
| Sam Taylor | 7/10 | 3056 days | 3% |
| Vanuxem | 8/10 | 3260 days | 2% |
| Clara Bertomeu | 10/10 | 3260 days | 2% |
| Lukas Boller | 9/10 | 3262 days | 2% |
| Mette Elholm | 7/10 | 3276 days | 2% |
| Mathilde Arp | 8/10 | 3276 days | 2% |
| Chloe and Guillame | 9/10 | 3280 days | 2% |
| Andre | 9/10 | 3282 days | 2% |
| Doerte | 10/10 | 3282 days | 2% |
| Saskia Peek | 9/10 | 3283 days | 2% |
| Erika Tarant | 8/10 | 3283 days | 2% |
| Jennifer Nguyen | 7/10 | 3284 days | 2% |
| Julie Duvert | 7/10 | 3284 days | 2% |
| Dan Ramsl | 4/10 | 3284 days | 1% |
| Lucy Mulvin | 7/10 | 3285 days | 2% |
| Fine Kochling | 9/10 | 3287 days | 2% |
| Eberhard | 9/10 | 3287 days | 2% |
| Hannes | 8/10 | 3288 days | 2% |
| Calum Penn | 9/10 | 3290 days | 2% |
| Arthur Portolleau | 6/10 | 3291 days | 2% |
| Elisabet | 10/10 | 3292 days | 2% |
| Tommy Mannien | 8/10 | 3293 days | 2% |
| Solange Bourbeois | 8/10 | 3296 days | 2% |
| Talissa Missiato | 10/10 | 3296 days | 2% |
| Severin Knegsch | 9/10 | 3297 days | 2% |
| Pierre Jouffineau | 10/10 | 3298 days | 2% |
| Lewis Whittle | 8/10 | 3300 days | 2% |
| Ben and Pauline | 8/10 | 3302 days | 2% |
| Ann-Kathrin | 7/10 | 3307 days | 2% |
| Natasha Harbinson | 10/10 | 3308 days | 2% |
| Sebastian | 2/10 | 3309 days | 1% |
| Jaquein Bucholz | 3/10 | 3309 days | 1% |
| Chiara | 7/10 | 3309 days | 2% |
| Cariotta Kemper | 3/10 | 3309 days | 1% |
| Megan Lenox | 7/10 | 3312 days | 2% |
| Max Mustermann | 8/10 | 3314 days | 2% |
| Amy Stafford | 8/10 | 3317 days | 2% |
| Carl | 7/10 | 3317 days | 2% |
| Briony | 7/10 | 3319 days | 2% |
| Melanie Kronbichler | 8/10 | 3320 days | 2% |
| Andreas Schiefer | 7/10 | 3321 days | 2% |
| Veronique Kaplan | 3/10 | 3323 days | 1% |
| Robin Ings | 6/10 | 3324 days | 2% |
| Stula Vladimir | 7/10 | 3325 days | 2% |
| David Soukal | 8/10 | 3325 days | 2% |
| Olivia Aliprandi | 7/10 | 3326 days | 2% |
| Isabelle | 2/10 | 3328 days | 1% |
| Jonathan Gourmel | 8/10 | 3328 days | 2% |
| Mikkel Palleson | 4/10 | 3331 days | 1% |
| Franziska and Sabine | 7/10 | 3332 days | 2% |
| Chloe Guerillot | 7/10 | 3332 days | 2% |
| Faye Oliver | 7/10 | 3334 days | 2% |
| Iris Kerbler | 9/10 | 3334 days | 2% |
| Til Schaebitz | 6/10 | 3335 days | 2% |
| Elisabeth Grabner | 9/10 | 3337 days | 2% |
| Berith | 10/10 | 3337 days | 2% |
| Chris Simpson | 6/10 | 3340 days | 2% |
| Pekka and Jonna | 9/10 | 3340 days | 2% |
| Jonas Hoerning | 8/10 | 3341 days | 2% |
| Nils | 10/10 | 3341 days | 2% |
| Mark Rosema | 8/10 | 3342 days | 2% |
| Lisa Huber | 10/10 | 3342 days | 2% |
| Nicola Wiggan | 9/10 | 3363 days | 2% |
| Linda and Gunther | 4/10 | 3364 days | 1% |
| Julie | 9/10 | 3365 days | 2% |
| Maria Schaer | 7/10 | 3369 days | 2% |
| Mette and Jesper | 5/10 | 3371 days | 2% |
| Pierre and Alexandra | 6/10 | 3377 days | 2% |
| Julia Waenninger | 8/10 | 3389 days | 2% |
| Sarah Boettcher | 9/10 | 3425 days | 2% |
| Suzanne Vermeulen | 6/10 | 3442 days | 2% |
| Blandine Giusti | 7/10 | 3645 days | 1% |
| Bart Hanssen | 6/10 | 3724 days | 1% |
| Astrid Egesten | 7/10 | 3775 days | 1% |
| Jean Curry | 9/10 | 3999 days | 1% |
| Carla Oyarzun | 1/10 | 4003 days | 0% |
| Philippe Chiasson | 9/10 | 4009 days | 1% |
| Helma Druyken | 4/10 | 4019 days | 0% |
| Florian Guttler | 7/10 | 4022 days | 1% |
| Casandra Prunica | 8/10 | 4023 days | 1% |
| Lauren Hedley | 7/10 | 4023 days | 1% |
| Janina Zwerver | 8/10 | 4023 days | 1% |
| Marieke Feyteres | 4/10 | 4027 days | 0% |
| van Linda Werner | 5/10 | 4027 days | 1% |
| Philip Donachie | 7/10 | 4037 days | 1% |
| Luisa Bach | 8/10 | 4037 days | 1% |
| Kristina | 7/10 | 4039 days | 1% |
| Eugen Lehner | 6/10 | 4040 days | 1% |
| Manuel Bach | 7/10 | 4040 days | 1% |
| Matthias Freiling | 2/10 | 4047 days | 0% |
| Debora Grusler | 6/10 | 4050 days | 1% |
| Andreas Brodhaeker | 8/10 | 4063 days | 1% |
| Renee van der Syde | 7/10 | 4064 days | 1% |
| Martha Horst | 8/10 | 4064 days | 1% |
| Roland Beer | 7/10 | 4068 days | 1% |
| Johanna Bak | 4/10 | 4068 days | 0% |
| Lior Bakski | 9/10 | 4078 days | 1% |
| Bet | 9/10 | 4079 days | 1% |
| Memain | 8/10 | 4352 days | 0% |
| Konza | 7/10 | 4353 days | 0% |
| Steen Rausmussen | 8/10 | 4384 days | 1% |
| David Restell | 10/10 | 4414 days | 1% |
| Christina Rodewald | 9/10 | 4419 days | 1% |
| Hanneke P | 7/10 | 4445 days | 1% |
| Kohler | 9/10 | 4465 days | 1% |
| Alexandra van den Brack | 6/10 | 4473 days | 1% |
| Paul Lawrence | 9/10 | 4474 days | 1% |
| Abby Rushmer | 7/10 | 4475 days | 1% |
| Stephan Olivier | 7/10 | 4480 days | 1% |
| Stephan Olivier | 7/10 | 4480 days | 1% |
| Faassen | 8/10 | 4484 days | 1% |
| Julie Lamart | 8/10 | 4485 days | 1% |
| Adrian Weidell | 5/10 | 4681 days | 1% |
| Jonathan Tuthill | 9/10 | 4736 days | 1% |
| A Ormsby | 10/10 | 4748 days | 1% |
| Gillian Rowe | 10/10 | 4761 days | 1% |
| Ryan Pynappels | 8/10 | 4762 days | 1% |
| Peter Dellen | 8/10 | 4763 days | 1% |
| Jorg Steffens | 8/10 | 4763 days | 1% |
| Danielle & Jobbe | 9/10 | 4765 days | 1% |
| Christina | 6/10 | 4766 days | 1% |
| Jop Veldhuis | 7/10 | 4766 days | 1% |
| Paul Weidenfeld | 8/10 | 4767 days | 1% |
| Sophie Dorrepaal | 7/10 | 4767 days | 1% |
| Fannette Peyreplane | 5/10 | 4768 days | 1% |
| Norm Cooper | 7/10 | 4772 days | 1% |
| Gloria, Rose & An | 8/10 | 4772 days | 1% |
| A Sorg | 10/10 | 4772 days | 1% |
| Samplonius | 5/10 | 4775 days | 1% |
| Petra | 10/10 | 4775 days | 1% |
| Bethany Hamilton | 8/10 | 4779 days | 1% |
| suffolkhouse69 | 9/10 | 4780 days | 1% |
| a a | 8/10 | 4811 days | 1% |
| Julia Balionis | 7/10 | 4825 days | 1% |
| Julia Hartman | 3/10 | 4826 days | 1% |
| Fabienne Indergand | 7/10 | 4846 days | 1% |
| Waldemar Schuler | 9/10 | 4858 days | 1% |
| pepette31 | 7/10 | 4933 days | 1% |
| Craig Hathaway | 9/10 | 5085 days | 1% |
| Stephane Lebel | 9/10 | 5090 days | 1% |
| Rens Hemselmans | 7/10 | 5103 days | 1% |
| Isabell | 10/10 | 5105 days | 1% |
| Holly Cave | 5/10 | 5105 days | 1% |
| J Palmer | 6/10 | 5109 days | 1% |
| Liz & Jim | 10/10 | 5111 days | 1% |
| Edgar & Marilyn Berry | 9/10 | 5113 days | 1% |
| Simon Vickers | 2/10 | 5116 days | 0% |
| Leslie | 8/10 | 5129 days | 1% |
| Jean-Francois Guilbault | 8/10 | 5130 days | 1% |
| Selina Mueller | 7/10 | 5131 days | 1% |
| Tamlin Barton | 3/10 | 5132 days | 1% |
| Cara Dungay | 8/10 | 5133 days | 1% |
| Bottcher | 10/10 | 5133 days | 1% |
| Alexandra | 10/10 | 5134 days | 1% |
| Philipp Rau | 7/10 | 5136 days | 1% |
| Dan Aldridge | 9/10 | 5138 days | 1% |
| John Allen | 8/10 | 5140 days | 1% |
| Curtis Penner | 8/10 | 5140 days | 1% |
| Brandt | 8/10 | 5142 days | 1% |
| Nadia Husain | 5/10 | 5145 days | 1% |
| T J Andrews | 6/10 | 5161 days | 1% |
| Charli Skinner | 7/10 | 5412 days | 1% |
| Carl_Larsen | 10/10 | 5421 days | 1% |
| Susan & Richard | 10/10 | 5482 days | 1% |
| Rik | 9/10 | 5483 days | 1% |
| Jonathan Martin | 7/10 | 5485 days | 1% |
| Gunda G | 9/10 | 5490 days | 1% |
| Aaron | 8/10 | 5492 days | 1% |
| Will Jemma | 6/10 | 5495 days | 1% |
| Christen Hans | 10/10 | 5496 days | 1% |
| Monica and Danie. | 7/10 | 5504 days | 1% |
| Stephen | 5/10 | 5506 days | 1% |
| Susan | 10/10 | 5506 days | 1% |
| snodge | 8/10 | 5510 days | 1% |
| Bo Moenstead | 9/10 | 5519 days | 1% |
| Alain Deslandres | 8/10 | 5523 days | 1% |
| Jakob Jurgen | 10/10 | 5524 days | 1% |
| EA Anders | 8/10 | 5527 days | 1% |
| Helen and Hans Walser | 1/10 | 5530 days | 0% |
| kevinp | 8/10 | 5553 days | 1% |
| warrenp | 9/10 | 5557 days | 1% |
| braunweiler | 9/10 | 5561 days | 1% |
| pimn | 9/10 | 5566 days | 1% |
| asiacritics | 7/10 | 5572 days | 1% |
| Chris Mackamul | 8/10 | 5579 days | 1% |
| Debbie Rathbone | 10/10 | 5579 days | 1% |
| Lisette X | 9/10 | 5580 days | 1% |
| Martin | 10/10 | 5582 days | 1% |
| Thomas Willi | 10/10 | 5582 days | 1% |
| Elodie | 7/10 | 5583 days | 1% |
| richardh | 7/10 | 5697 days | 1% |
| trvlbug | 8/10 | 5725 days | 1% |
| glennandjen | 10/10 | 5786 days | 1% |
| BryonyS | 9/10 | 5804 days | 1% |
| Marion | 9/10 | 5820 days | 1% |
| Mikey | 7/10 | 5821 days | 1% |
| Richard Komzik | 6/10 | 5822 days | 1% |
| Michael Walsall | 10/10 | 5826 days | 1% |
| Anna | 8/10 | 5840 days | 1% |
| Abigail | 7/10 | 5840 days | 1% |
| lannie | 7/10 | 5849 days | 1% |
| SimonR | 8/10 | 5850 days | 1% |
| SonjaG | 7/10 | 5850 days | 1% |
| Chris | 8/10 | 5856 days | 1% |
| AurelieD | 8/10 | 5863 days | 1% |
| Yunker | 10/10 | 5864 days | 1% |
| Andrew | 8/10 | 5866 days | 1% |
| Erin | 9/10 | 5866 days | 1% |
| Christopher Gallaga | 8/10 | 5872 days | 1% |
| Amy | 10/10 | 5878 days | 1% |
| Shona | 8/10 | 5878 days | 1% |
| plumbaum | 9/10 | 5880 days | 1% |
| Sandra | 10/10 | 5888 days | 1% |
| Evangelista | 8/10 | 5888 days | 1% |
| Oliver | 5/10 | 5890 days | 1% |
| Kat | 9/10 | 5920 days | 1% |
| Lisa | 8/10 | 5947 days | 1% |
| siobhan | 8/10 | 5949 days | 1% |
| Alice | 8/10 | 5949 days | 1% |
| NORTZ | 7/10 | 5977 days | 1% |
| Stefan | 8/10 | 5980 days | 1% |
| Hugh Trenchard | 9/10 | 5996 days | 1% |
| Niamh | 4/10 | 6002 days | 1% |
| Jenny | 9/10 | 6026 days | 1% |
| Louise | 8/10 | 6035 days | 1% |
| Peddy | 10/10 | 6045 days | 1% |
| Katie Wise | 8/10 | 6048 days | 1% |
| Thomas Bachmann | 8/10 | 6064 days | 1% |
| Daniala | 8/10 | 6083 days | 1% |
| Tom Ben | 9/10 | 6187 days | 1% |
| Sarah Maudsley | 8/10 | 6202 days | 1% |
| Alan Bellerby | 8/10 | 6202 days | 1% |
| Tina Daly | 5/10 | 6208 days | 1% |
| John Woodrow | 8/10 | 6217 days | 1% |
| Ernst Seter | 9/10 | 6217 days | 1% |
| Jim Curley | 7/10 | 6228 days | 1% |
| Daniel | 7/10 | 6229 days | 1% |
| Marc Hertogs | 7/10 | 6232 days | 1% |
| Laura Sutton | 5/10 | 6256 days | 1% |
| Jeroen | 5/10 | 6258 days | 1% |
| Mum! | 6/10 | 6258 days | 1% |
| Gail | 9/10 | 6262 days | 1% |
| Heike Julia | 6/10 | 6263 days | 1% |
| Lanni | 8/10 | 6263 days | 1% |
| Amanda Finger | 7/10 | 6264 days | 1% |
| Desiree Muri | 7/10 | 6264 days | 1% |
| Jan Grzejik | 8/10 | 6291 days | 1% |
| Wouter Ewalts | 8/10 | 6298 days | 1% |
| Matilde | 6/10 | 6306 days | 1% |
| Kim | 6/10 | 6503 days | 1% |
| Gillian | 8/10 | 6545 days | 1% |
| Denise Nick | 6/10 | 6555 days | 1% |
| ranker_110 | 8/10 | 6574 days | 1% |
| Jasper | 7/10 | 6581 days | 1% |
| Mary | 8/10 | 6581 days | 1% |
| Lucy | 6/10 | 6581 days | 1% |
| Lukas | 8/10 | 6592 days | 1% |
| Hanna | 7/10 | 6594 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
-4.09% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 55 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 | -4.03% |
| 198 | -4.05% |
| 199 | -4.07% |
| 200 | -4.09% |
| 201 | -4.11% |
| 202 | -4.13% |
| 203 | -4.15% |
| … | … |
Balancing Adjustment
6.22% 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
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.