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.
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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
75.58%
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 | 246 days | 100% |
| Anne | 7/10 | 581 days | 84% |
| ros fraser | 4/10 | 2591 days | 2% |
| wynden | 1/10 | 2619 days | 1% |
| Rado Hank | 10/10 | 2706 days | 3% |
| Lizzie Edmonds | 8/10 | 2707 days | 3% |
| Anis Quentin | 7/10 | 2714 days | 3% |
| Jeny Smolders | 7/10 | 2718 days | 3% |
| Oscar Petersen | 8/10 | 2725 days | 3% |
| Ani | 9/10 | 2834 days | 3% |
| Martin Murlik | 8/10 | 2946 days | 3% |
| Laura | 9/10 | 2957 days | 3% |
| Melanie Farrell | 7/10 | 2965 days | 3% |
| Andy | 10/10 | 2972 days | 3% |
| Julia Achatz | 5/10 | 2986 days | 2% |
| Auba Mateos | 7/10 | 2992 days | 3% |
| Charlotte | 7/10 | 2992 days | 3% |
| Isabel Zedelius | 8/10 | 2995 days | 3% |
| Dries | 8/10 | 3035 days | 3% |
| Clarissa Glaser | 8/10 | 3036 days | 3% |
| Alna | 10/10 | 3041 days | 3% |
| Holger Worner | 9/10 | 3041 days | 3% |
| Karlee Hormell | 9/10 | 3050 days | 3% |
| Alonso | 9/10 | 3054 days | 3% |
| Rose Guillaume | 8/10 | 3057 days | 3% |
| Caroline Coudray | 8/10 | 3061 days | 3% |
| Barbara | 8/10 | 3061 days | 3% |
| Leonie Brabers | 7/10 | 3069 days | 2% |
| Bina Johansson | 10/10 | 3069 days | 3% |
| Sam Staines | 9/10 | 3073 days | 3% |
| Erik | 6/10 | 3076 days | 2% |
| Nicole Signer | 8/10 | 3083 days | 2% |
| Sam Taylor | 7/10 | 3087 days | 2% |
| Vanuxem | 8/10 | 3291 days | 2% |
| Clara Bertomeu | 10/10 | 3291 days | 2% |
| Lukas Boller | 9/10 | 3293 days | 2% |
| Mette Elholm | 7/10 | 3307 days | 2% |
| Mathilde Arp | 8/10 | 3307 days | 2% |
| Chloe and Guillame | 9/10 | 3311 days | 2% |
| Andre | 9/10 | 3313 days | 2% |
| Doerte | 10/10 | 3313 days | 2% |
| Saskia Peek | 9/10 | 3314 days | 2% |
| Erika Tarant | 8/10 | 3314 days | 2% |
| Jennifer Nguyen | 7/10 | 3315 days | 2% |
| Julie Duvert | 7/10 | 3315 days | 2% |
| Dan Ramsl | 4/10 | 3315 days | 1% |
| Lucy Mulvin | 7/10 | 3316 days | 2% |
| Fine Kochling | 9/10 | 3318 days | 2% |
| Eberhard | 9/10 | 3318 days | 2% |
| Hannes | 8/10 | 3319 days | 2% |
| Calum Penn | 9/10 | 3321 days | 2% |
| Arthur Portolleau | 6/10 | 3322 days | 2% |
| Elisabet | 10/10 | 3323 days | 2% |
| Tommy Mannien | 8/10 | 3324 days | 2% |
| Solange Bourbeois | 8/10 | 3327 days | 2% |
| Talissa Missiato | 10/10 | 3327 days | 2% |
| Severin Knegsch | 9/10 | 3328 days | 2% |
| Pierre Jouffineau | 10/10 | 3329 days | 2% |
| Lewis Whittle | 8/10 | 3331 days | 2% |
| Ben and Pauline | 8/10 | 3333 days | 2% |
| Ann-Kathrin | 7/10 | 3338 days | 2% |
| Natasha Harbinson | 10/10 | 3339 days | 2% |
| Sebastian | 2/10 | 3340 days | 1% |
| Jaquein Bucholz | 3/10 | 3340 days | 1% |
| Chiara | 7/10 | 3340 days | 2% |
| Cariotta Kemper | 3/10 | 3340 days | 1% |
| Megan Lenox | 7/10 | 3343 days | 2% |
| Max Mustermann | 8/10 | 3345 days | 2% |
| Amy Stafford | 8/10 | 3348 days | 2% |
| Carl | 7/10 | 3348 days | 2% |
| Briony | 7/10 | 3350 days | 2% |
| Melanie Kronbichler | 8/10 | 3351 days | 2% |
| Andreas Schiefer | 7/10 | 3352 days | 2% |
| Veronique Kaplan | 3/10 | 3354 days | 1% |
| Robin Ings | 6/10 | 3355 days | 2% |
| Stula Vladimir | 7/10 | 3356 days | 2% |
| David Soukal | 8/10 | 3356 days | 2% |
| Olivia Aliprandi | 7/10 | 3357 days | 2% |
| Isabelle | 2/10 | 3359 days | 1% |
| Jonathan Gourmel | 8/10 | 3359 days | 2% |
| Mikkel Palleson | 4/10 | 3362 days | 1% |
| Franziska and Sabine | 7/10 | 3363 days | 2% |
| Chloe Guerillot | 7/10 | 3363 days | 2% |
| Faye Oliver | 7/10 | 3365 days | 2% |
| Iris Kerbler | 9/10 | 3365 days | 2% |
| Til Schaebitz | 6/10 | 3366 days | 2% |
| Elisabeth Grabner | 9/10 | 3368 days | 2% |
| Berith | 10/10 | 3368 days | 2% |
| Chris Simpson | 6/10 | 3371 days | 2% |
| Pekka and Jonna | 9/10 | 3371 days | 2% |
| Jonas Hoerning | 8/10 | 3372 days | 2% |
| Nils | 10/10 | 3372 days | 2% |
| Mark Rosema | 8/10 | 3373 days | 2% |
| Lisa Huber | 10/10 | 3373 days | 2% |
| Nicola Wiggan | 9/10 | 3394 days | 2% |
| Linda and Gunther | 4/10 | 3395 days | 1% |
| Julie | 9/10 | 3396 days | 2% |
| Maria Schaer | 7/10 | 3400 days | 2% |
| Mette and Jesper | 5/10 | 3402 days | 1% |
| Pierre and Alexandra | 6/10 | 3408 days | 2% |
| Julia Waenninger | 8/10 | 3420 days | 2% |
| Sarah Boettcher | 9/10 | 3456 days | 2% |
| Suzanne Vermeulen | 6/10 | 3473 days | 1% |
| Blandine Giusti | 7/10 | 3676 days | 1% |
| Bart Hanssen | 6/10 | 3755 days | 1% |
| Astrid Egesten | 7/10 | 3807 days | 1% |
| Jean Curry | 9/10 | 4030 days | 0% |
| Carla Oyarzun | 1/10 | 4034 days | 0% |
| Philippe Chiasson | 9/10 | 4040 days | 0% |
| Helma Druyken | 4/10 | 4050 days | 0% |
| Florian Guttler | 7/10 | 4053 days | 0% |
| Casandra Prunica | 8/10 | 4054 days | 0% |
| Lauren Hedley | 7/10 | 4054 days | 0% |
| Janina Zwerver | 8/10 | 4054 days | 0% |
| Marieke Feyteres | 4/10 | 4058 days | 0% |
| van Linda Werner | 5/10 | 4058 days | 0% |
| Philip Donachie | 7/10 | 4068 days | 0% |
| Luisa Bach | 8/10 | 4068 days | 0% |
| Kristina | 7/10 | 4070 days | 0% |
| Eugen Lehner | 6/10 | 4071 days | 0% |
| Manuel Bach | 7/10 | 4071 days | 0% |
| Matthias Freiling | 2/10 | 4078 days | 0% |
| Debora Grusler | 6/10 | 4081 days | 0% |
| Andreas Brodhaeker | 8/10 | 4094 days | 0% |
| Renee van der Syde | 7/10 | 4095 days | 0% |
| Martha Horst | 8/10 | 4095 days | 0% |
| Roland Beer | 7/10 | 4099 days | 0% |
| Johanna Bak | 4/10 | 4099 days | 0% |
| Lior Bakski | 9/10 | 4109 days | 0% |
| Bet | 9/10 | 4110 days | 0% |
| Memain | 8/10 | 4383 days | 1% |
| Konza | 7/10 | 4384 days | 1% |
| Steen Rausmussen | 8/10 | 4415 days | 1% |
| David Restell | 10/10 | 4445 days | 1% |
| Christina Rodewald | 9/10 | 4450 days | 1% |
| Hanneke P | 7/10 | 4476 days | 1% |
| Kohler | 9/10 | 4496 days | 1% |
| Alexandra van den Brack | 6/10 | 4504 days | 1% |
| Paul Lawrence | 9/10 | 4505 days | 1% |
| Abby Rushmer | 7/10 | 4506 days | 1% |
| Stephan Olivier | 7/10 | 4511 days | 1% |
| Stephan Olivier | 7/10 | 4511 days | 1% |
| Faassen | 8/10 | 4515 days | 1% |
| Julie Lamart | 8/10 | 4516 days | 1% |
| Adrian Weidell | 5/10 | 4712 days | 1% |
| Jonathan Tuthill | 9/10 | 4767 days | 1% |
| A Ormsby | 10/10 | 4779 days | 1% |
| Gillian Rowe | 10/10 | 4792 days | 1% |
| Ryan Pynappels | 8/10 | 4793 days | 1% |
| Peter Dellen | 8/10 | 4794 days | 1% |
| Jorg Steffens | 8/10 | 4794 days | 1% |
| Danielle & Jobbe | 9/10 | 4796 days | 1% |
| Christina | 6/10 | 4797 days | 1% |
| Jop Veldhuis | 7/10 | 4797 days | 1% |
| Paul Weidenfeld | 8/10 | 4798 days | 1% |
| Sophie Dorrepaal | 7/10 | 4798 days | 1% |
| Fannette Peyreplane | 5/10 | 4799 days | 1% |
| Norm Cooper | 7/10 | 4803 days | 1% |
| Gloria, Rose & An | 8/10 | 4803 days | 1% |
| A Sorg | 10/10 | 4803 days | 1% |
| Samplonius | 5/10 | 4806 days | 1% |
| Petra | 10/10 | 4806 days | 1% |
| Bethany Hamilton | 8/10 | 4810 days | 1% |
| suffolkhouse69 | 9/10 | 4811 days | 1% |
| a a | 8/10 | 4842 days | 1% |
| Julia Balionis | 7/10 | 4856 days | 1% |
| Julia Hartman | 3/10 | 4857 days | 0% |
| Fabienne Indergand | 7/10 | 4877 days | 1% |
| Waldemar Schuler | 9/10 | 4889 days | 1% |
| pepette31 | 7/10 | 4964 days | 1% |
| Craig Hathaway | 9/10 | 5116 days | 1% |
| Stephane Lebel | 9/10 | 5121 days | 1% |
| Rens Hemselmans | 7/10 | 5134 days | 1% |
| Isabell | 10/10 | 5136 days | 1% |
| Holly Cave | 5/10 | 5136 days | 1% |
| J Palmer | 6/10 | 5140 days | 1% |
| Liz & Jim | 10/10 | 5142 days | 1% |
| Edgar & Marilyn Berry | 9/10 | 5144 days | 1% |
| Simon Vickers | 2/10 | 5147 days | 0% |
| Leslie | 8/10 | 5160 days | 1% |
| Jean-Francois Guilbault | 8/10 | 5161 days | 1% |
| Selina Mueller | 7/10 | 5162 days | 1% |
| Tamlin Barton | 3/10 | 5163 days | 0% |
| Cara Dungay | 8/10 | 5164 days | 1% |
| Bottcher | 10/10 | 5164 days | 1% |
| Alexandra | 10/10 | 5165 days | 1% |
| Philipp Rau | 7/10 | 5167 days | 1% |
| Dan Aldridge | 9/10 | 5169 days | 1% |
| John Allen | 8/10 | 5171 days | 1% |
| Curtis Penner | 8/10 | 5171 days | 1% |
| Brandt | 8/10 | 5173 days | 1% |
| Nadia Husain | 5/10 | 5176 days | 1% |
| T J Andrews | 6/10 | 5192 days | 1% |
| Charli Skinner | 7/10 | 5443 days | 1% |
| Carl_Larsen | 10/10 | 5452 days | 1% |
| Susan & Richard | 10/10 | 5513 days | 1% |
| Rik | 9/10 | 5514 days | 1% |
| Jonathan Martin | 7/10 | 5516 days | 1% |
| Gunda G | 9/10 | 5521 days | 1% |
| Aaron | 8/10 | 5523 days | 1% |
| Will Jemma | 6/10 | 5526 days | 1% |
| Christen Hans | 10/10 | 5527 days | 1% |
| Monica and Danie. | 7/10 | 5535 days | 1% |
| Stephen | 5/10 | 5537 days | 1% |
| Susan | 10/10 | 5537 days | 1% |
| snodge | 8/10 | 5541 days | 1% |
| Bo Moenstead | 9/10 | 5550 days | 1% |
| Alain Deslandres | 8/10 | 5554 days | 1% |
| Jakob Jurgen | 10/10 | 5555 days | 1% |
| EA Anders | 8/10 | 5558 days | 1% |
| Helen and Hans Walser | 1/10 | 5561 days | 0% |
| kevinp | 8/10 | 5584 days | 1% |
| warrenp | 9/10 | 5588 days | 1% |
| braunweiler | 9/10 | 5592 days | 1% |
| pimn | 9/10 | 5597 days | 1% |
| asiacritics | 7/10 | 5603 days | 1% |
| Chris Mackamul | 8/10 | 5610 days | 1% |
| Debbie Rathbone | 10/10 | 5610 days | 1% |
| Lisette X | 9/10 | 5611 days | 1% |
| Martin | 10/10 | 5613 days | 1% |
| Thomas Willi | 10/10 | 5613 days | 1% |
| Elodie | 7/10 | 5614 days | 1% |
| richardh | 7/10 | 5728 days | 1% |
| trvlbug | 8/10 | 5756 days | 1% |
| glennandjen | 10/10 | 5817 days | 1% |
| BryonyS | 9/10 | 5835 days | 1% |
| Marion | 9/10 | 5852 days | 1% |
| Mikey | 7/10 | 5852 days | 1% |
| Richard Komzik | 6/10 | 5853 days | 1% |
| Michael Walsall | 10/10 | 5857 days | 1% |
| Anna | 8/10 | 5871 days | 1% |
| Abigail | 7/10 | 5871 days | 1% |
| lannie | 7/10 | 5881 days | 1% |
| SimonR | 8/10 | 5881 days | 1% |
| SonjaG | 7/10 | 5881 days | 1% |
| Chris | 8/10 | 5888 days | 1% |
| AurelieD | 8/10 | 5894 days | 1% |
| Yunker | 10/10 | 5896 days | 1% |
| Andrew | 8/10 | 5898 days | 1% |
| Erin | 9/10 | 5898 days | 1% |
| Christopher Gallaga | 8/10 | 5904 days | 1% |
| Amy | 10/10 | 5909 days | 1% |
| Shona | 8/10 | 5909 days | 1% |
| plumbaum | 9/10 | 5912 days | 1% |
| Sandra | 10/10 | 5920 days | 1% |
| Evangelista | 8/10 | 5920 days | 1% |
| Oliver | 5/10 | 5922 days | 1% |
| Kat | 9/10 | 5952 days | 1% |
| Lisa | 8/10 | 5979 days | 1% |
| siobhan | 8/10 | 5981 days | 1% |
| Alice | 8/10 | 5981 days | 1% |
| NORTZ | 7/10 | 6009 days | 1% |
| Stefan | 8/10 | 6011 days | 1% |
| Hugh Trenchard | 9/10 | 6027 days | 1% |
| Niamh | 4/10 | 6034 days | 0% |
| Jenny | 9/10 | 6058 days | 1% |
| Louise | 8/10 | 6067 days | 1% |
| Peddy | 10/10 | 6077 days | 1% |
| Katie Wise | 8/10 | 6080 days | 1% |
| Thomas Bachmann | 8/10 | 6096 days | 1% |
| Daniala | 8/10 | 6115 days | 1% |
| Tom Ben | 9/10 | 6218 days | 1% |
| Sarah Maudsley | 8/10 | 6233 days | 1% |
| Alan Bellerby | 8/10 | 6233 days | 1% |
| Tina Daly | 5/10 | 6239 days | 1% |
| John Woodrow | 8/10 | 6248 days | 1% |
| Ernst Seter | 9/10 | 6248 days | 1% |
| Jim Curley | 7/10 | 6259 days | 1% |
| Daniel | 7/10 | 6260 days | 1% |
| Marc Hertogs | 7/10 | 6263 days | 1% |
| Laura Sutton | 5/10 | 6287 days | 1% |
| Jeroen | 5/10 | 6289 days | 1% |
| Mum! | 6/10 | 6289 days | 1% |
| Gail | 9/10 | 6293 days | 1% |
| Heike Julia | 6/10 | 6294 days | 1% |
| Lanni | 8/10 | 6294 days | 1% |
| Amanda Finger | 7/10 | 6295 days | 1% |
| Desiree Muri | 7/10 | 6295 days | 1% |
| Jan Grzejik | 8/10 | 6322 days | 1% |
| Wouter Ewalts | 8/10 | 6329 days | 1% |
| Matilde | 6/10 | 6337 days | 1% |
| Kim | 6/10 | 6534 days | 1% |
| Gillian | 8/10 | 6576 days | 1% |
| Denise Nick | 6/10 | 6586 days | 1% |
| ranker_110 | 8/10 | 6605 days | 1% |
| Jasper | 7/10 | 6612 days | 1% |
| Mary | 8/10 | 6612 days | 1% |
| Lucy | 6/10 | 6612 days | 1% |
| Lukas | 8/10 | 6623 days | 1% |
| Hanna | 7/10 | 6625 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
-3.68% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 61 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 | -3.63% |
| 198 | -3.65% |
| 199 | -3.66% |
| 200 | -3.68% |
| 201 | -3.70% |
| 202 | -3.72% |
| 203 | -3.74% |
| … | … |
Balancing Adjustment
6.01% 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.