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.
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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 | 250 days | 100% |
| Anne | 7/10 | 585 days | 83% |
| ros fraser | 4/10 | 2595 days | 2% |
| wynden | 1/10 | 2623 days | 1% |
| Rado Hank | 10/10 | 2710 days | 3% |
| Lizzie Edmonds | 8/10 | 2711 days | 3% |
| Anis Quentin | 7/10 | 2718 days | 3% |
| Jeny Smolders | 7/10 | 2722 days | 3% |
| Oscar Petersen | 8/10 | 2729 days | 3% |
| Ani | 9/10 | 2837 days | 3% |
| Martin Murlik | 8/10 | 2950 days | 3% |
| Laura | 9/10 | 2961 days | 3% |
| Melanie Farrell | 7/10 | 2969 days | 3% |
| Andy | 10/10 | 2976 days | 3% |
| Julia Achatz | 5/10 | 2990 days | 2% |
| Auba Mateos | 7/10 | 2996 days | 3% |
| Charlotte | 7/10 | 2996 days | 3% |
| Isabel Zedelius | 8/10 | 2999 days | 3% |
| Dries | 8/10 | 3039 days | 3% |
| Clarissa Glaser | 8/10 | 3040 days | 3% |
| Alna | 10/10 | 3045 days | 3% |
| Holger Worner | 9/10 | 3045 days | 3% |
| Karlee Hormell | 9/10 | 3054 days | 3% |
| Alonso | 9/10 | 3058 days | 3% |
| Rose Guillaume | 8/10 | 3061 days | 3% |
| Caroline Coudray | 8/10 | 3065 days | 3% |
| Barbara | 8/10 | 3065 days | 3% |
| Leonie Brabers | 7/10 | 3073 days | 2% |
| Bina Johansson | 10/10 | 3073 days | 3% |
| Sam Staines | 9/10 | 3077 days | 3% |
| Erik | 6/10 | 3080 days | 2% |
| Nicole Signer | 8/10 | 3087 days | 2% |
| Sam Taylor | 7/10 | 3091 days | 2% |
| Vanuxem | 8/10 | 3295 days | 2% |
| Clara Bertomeu | 10/10 | 3295 days | 2% |
| Lukas Boller | 9/10 | 3297 days | 2% |
| Mette Elholm | 7/10 | 3311 days | 2% |
| Mathilde Arp | 8/10 | 3311 days | 2% |
| Chloe and Guillame | 9/10 | 3315 days | 2% |
| Andre | 9/10 | 3317 days | 2% |
| Doerte | 10/10 | 3317 days | 2% |
| Saskia Peek | 9/10 | 3318 days | 2% |
| Erika Tarant | 8/10 | 3318 days | 2% |
| Jennifer Nguyen | 7/10 | 3319 days | 2% |
| Julie Duvert | 7/10 | 3319 days | 2% |
| Dan Ramsl | 4/10 | 3319 days | 1% |
| Lucy Mulvin | 7/10 | 3320 days | 2% |
| Fine Kochling | 9/10 | 3322 days | 2% |
| Eberhard | 9/10 | 3322 days | 2% |
| Hannes | 8/10 | 3323 days | 2% |
| Calum Penn | 9/10 | 3325 days | 2% |
| Arthur Portolleau | 6/10 | 3326 days | 2% |
| Elisabet | 10/10 | 3327 days | 2% |
| Tommy Mannien | 8/10 | 3328 days | 2% |
| Solange Bourbeois | 8/10 | 3331 days | 2% |
| Talissa Missiato | 10/10 | 3331 days | 2% |
| Severin Knegsch | 9/10 | 3332 days | 2% |
| Pierre Jouffineau | 10/10 | 3333 days | 2% |
| Lewis Whittle | 8/10 | 3335 days | 2% |
| Ben and Pauline | 8/10 | 3337 days | 2% |
| Ann-Kathrin | 7/10 | 3342 days | 2% |
| Natasha Harbinson | 10/10 | 3343 days | 2% |
| Sebastian | 2/10 | 3344 days | 1% |
| Jaquein Bucholz | 3/10 | 3344 days | 1% |
| Chiara | 7/10 | 3344 days | 2% |
| Cariotta Kemper | 3/10 | 3344 days | 1% |
| Megan Lenox | 7/10 | 3347 days | 2% |
| Max Mustermann | 8/10 | 3349 days | 2% |
| Amy Stafford | 8/10 | 3352 days | 2% |
| Carl | 7/10 | 3352 days | 2% |
| Briony | 7/10 | 3354 days | 2% |
| Melanie Kronbichler | 8/10 | 3355 days | 2% |
| Andreas Schiefer | 7/10 | 3356 days | 2% |
| Veronique Kaplan | 3/10 | 3358 days | 1% |
| Robin Ings | 6/10 | 3359 days | 2% |
| Stula Vladimir | 7/10 | 3360 days | 2% |
| David Soukal | 8/10 | 3360 days | 2% |
| Olivia Aliprandi | 7/10 | 3361 days | 2% |
| Isabelle | 2/10 | 3363 days | 1% |
| Jonathan Gourmel | 8/10 | 3363 days | 2% |
| Mikkel Palleson | 4/10 | 3366 days | 1% |
| Franziska and Sabine | 7/10 | 3367 days | 2% |
| Chloe Guerillot | 7/10 | 3367 days | 2% |
| Faye Oliver | 7/10 | 3369 days | 2% |
| Iris Kerbler | 9/10 | 3369 days | 2% |
| Til Schaebitz | 6/10 | 3370 days | 2% |
| Elisabeth Grabner | 9/10 | 3372 days | 2% |
| Berith | 10/10 | 3372 days | 2% |
| Chris Simpson | 6/10 | 3375 days | 2% |
| Pekka and Jonna | 9/10 | 3375 days | 2% |
| Jonas Hoerning | 8/10 | 3376 days | 2% |
| Nils | 10/10 | 3376 days | 2% |
| Mark Rosema | 8/10 | 3377 days | 2% |
| Lisa Huber | 10/10 | 3377 days | 2% |
| Nicola Wiggan | 9/10 | 3398 days | 2% |
| Linda and Gunther | 4/10 | 3399 days | 1% |
| Julie | 9/10 | 3400 days | 2% |
| Maria Schaer | 7/10 | 3404 days | 2% |
| Mette and Jesper | 5/10 | 3406 days | 1% |
| Pierre and Alexandra | 6/10 | 3412 days | 2% |
| Julia Waenninger | 8/10 | 3424 days | 2% |
| Sarah Boettcher | 9/10 | 3460 days | 2% |
| Suzanne Vermeulen | 6/10 | 3477 days | 1% |
| Blandine Giusti | 7/10 | 3680 days | 1% |
| Bart Hanssen | 6/10 | 3759 days | 1% |
| Astrid Egesten | 7/10 | 3810 days | 1% |
| Jean Curry | 9/10 | 4034 days | 0% |
| Carla Oyarzun | 1/10 | 4038 days | 0% |
| Philippe Chiasson | 9/10 | 4044 days | 0% |
| Helma Druyken | 4/10 | 4054 days | 0% |
| Florian Guttler | 7/10 | 4057 days | 0% |
| Casandra Prunica | 8/10 | 4058 days | 0% |
| Lauren Hedley | 7/10 | 4058 days | 0% |
| Janina Zwerver | 8/10 | 4058 days | 0% |
| Marieke Feyteres | 4/10 | 4062 days | 0% |
| van Linda Werner | 5/10 | 4062 days | 0% |
| Philip Donachie | 7/10 | 4072 days | 0% |
| Luisa Bach | 8/10 | 4072 days | 0% |
| Kristina | 7/10 | 4074 days | 0% |
| Eugen Lehner | 6/10 | 4075 days | 0% |
| Manuel Bach | 7/10 | 4075 days | 0% |
| Matthias Freiling | 2/10 | 4082 days | 0% |
| Debora Grusler | 6/10 | 4085 days | 0% |
| Andreas Brodhaeker | 8/10 | 4098 days | 0% |
| Renee van der Syde | 7/10 | 4099 days | 0% |
| Martha Horst | 8/10 | 4099 days | 0% |
| Roland Beer | 7/10 | 4103 days | 0% |
| Johanna Bak | 4/10 | 4103 days | 0% |
| Lior Bakski | 9/10 | 4113 days | 0% |
| Bet | 9/10 | 4114 days | 0% |
| Memain | 8/10 | 4387 days | 1% |
| Konza | 7/10 | 4388 days | 1% |
| Steen Rausmussen | 8/10 | 4419 days | 1% |
| David Restell | 10/10 | 4449 days | 1% |
| Christina Rodewald | 9/10 | 4454 days | 1% |
| Hanneke P | 7/10 | 4480 days | 1% |
| Kohler | 9/10 | 4500 days | 1% |
| Alexandra van den Brack | 6/10 | 4508 days | 1% |
| Paul Lawrence | 9/10 | 4509 days | 1% |
| Abby Rushmer | 7/10 | 4510 days | 1% |
| Stephan Olivier | 7/10 | 4515 days | 1% |
| Stephan Olivier | 7/10 | 4515 days | 1% |
| Faassen | 8/10 | 4519 days | 1% |
| Julie Lamart | 8/10 | 4520 days | 1% |
| Adrian Weidell | 5/10 | 4716 days | 1% |
| Jonathan Tuthill | 9/10 | 4771 days | 1% |
| A Ormsby | 10/10 | 4783 days | 1% |
| Gillian Rowe | 10/10 | 4796 days | 1% |
| Ryan Pynappels | 8/10 | 4797 days | 1% |
| Peter Dellen | 8/10 | 4798 days | 1% |
| Jorg Steffens | 8/10 | 4798 days | 1% |
| Danielle & Jobbe | 9/10 | 4800 days | 1% |
| Christina | 6/10 | 4801 days | 1% |
| Jop Veldhuis | 7/10 | 4801 days | 1% |
| Paul Weidenfeld | 8/10 | 4802 days | 1% |
| Sophie Dorrepaal | 7/10 | 4802 days | 1% |
| Fannette Peyreplane | 5/10 | 4803 days | 1% |
| Norm Cooper | 7/10 | 4807 days | 1% |
| Gloria, Rose & An | 8/10 | 4807 days | 1% |
| A Sorg | 10/10 | 4807 days | 1% |
| Samplonius | 5/10 | 4810 days | 1% |
| Petra | 10/10 | 4810 days | 1% |
| Bethany Hamilton | 8/10 | 4814 days | 1% |
| suffolkhouse69 | 9/10 | 4815 days | 1% |
| a a | 8/10 | 4846 days | 1% |
| Julia Balionis | 7/10 | 4860 days | 1% |
| Julia Hartman | 3/10 | 4861 days | 0% |
| Fabienne Indergand | 7/10 | 4881 days | 1% |
| Waldemar Schuler | 9/10 | 4893 days | 1% |
| pepette31 | 7/10 | 4968 days | 1% |
| Craig Hathaway | 9/10 | 5120 days | 1% |
| Stephane Lebel | 9/10 | 5125 days | 1% |
| Rens Hemselmans | 7/10 | 5138 days | 1% |
| Isabell | 10/10 | 5140 days | 1% |
| Holly Cave | 5/10 | 5140 days | 1% |
| J Palmer | 6/10 | 5144 days | 1% |
| Liz & Jim | 10/10 | 5146 days | 1% |
| Edgar & Marilyn Berry | 9/10 | 5148 days | 1% |
| Simon Vickers | 2/10 | 5151 days | 0% |
| Leslie | 8/10 | 5164 days | 1% |
| Jean-Francois Guilbault | 8/10 | 5165 days | 1% |
| Selina Mueller | 7/10 | 5166 days | 1% |
| Tamlin Barton | 3/10 | 5167 days | 0% |
| Cara Dungay | 8/10 | 5168 days | 1% |
| Bottcher | 10/10 | 5168 days | 1% |
| Alexandra | 10/10 | 5169 days | 1% |
| Philipp Rau | 7/10 | 5171 days | 1% |
| Dan Aldridge | 9/10 | 5173 days | 1% |
| John Allen | 8/10 | 5175 days | 1% |
| Curtis Penner | 8/10 | 5175 days | 1% |
| Brandt | 8/10 | 5177 days | 1% |
| Nadia Husain | 5/10 | 5180 days | 1% |
| T J Andrews | 6/10 | 5196 days | 1% |
| Charli Skinner | 7/10 | 5447 days | 1% |
| Carl_Larsen | 10/10 | 5456 days | 1% |
| Susan & Richard | 10/10 | 5517 days | 1% |
| Rik | 9/10 | 5518 days | 1% |
| Jonathan Martin | 7/10 | 5520 days | 1% |
| Gunda G | 9/10 | 5525 days | 1% |
| Aaron | 8/10 | 5527 days | 1% |
| Will Jemma | 6/10 | 5530 days | 1% |
| Christen Hans | 10/10 | 5531 days | 1% |
| Monica and Danie. | 7/10 | 5539 days | 1% |
| Stephen | 5/10 | 5541 days | 1% |
| Susan | 10/10 | 5541 days | 1% |
| snodge | 8/10 | 5545 days | 1% |
| Bo Moenstead | 9/10 | 5554 days | 1% |
| Alain Deslandres | 8/10 | 5558 days | 1% |
| Jakob Jurgen | 10/10 | 5559 days | 1% |
| EA Anders | 8/10 | 5562 days | 1% |
| Helen and Hans Walser | 1/10 | 5565 days | 0% |
| kevinp | 8/10 | 5588 days | 1% |
| warrenp | 9/10 | 5592 days | 1% |
| braunweiler | 9/10 | 5596 days | 1% |
| pimn | 9/10 | 5601 days | 1% |
| asiacritics | 7/10 | 5607 days | 1% |
| Chris Mackamul | 8/10 | 5614 days | 1% |
| Debbie Rathbone | 10/10 | 5614 days | 1% |
| Lisette X | 9/10 | 5615 days | 1% |
| Martin | 10/10 | 5617 days | 1% |
| Thomas Willi | 10/10 | 5617 days | 1% |
| Elodie | 7/10 | 5618 days | 1% |
| richardh | 7/10 | 5732 days | 1% |
| trvlbug | 8/10 | 5760 days | 1% |
| glennandjen | 10/10 | 5821 days | 1% |
| BryonyS | 9/10 | 5839 days | 1% |
| Marion | 9/10 | 5855 days | 1% |
| Mikey | 7/10 | 5856 days | 1% |
| Richard Komzik | 6/10 | 5857 days | 1% |
| Michael Walsall | 10/10 | 5861 days | 1% |
| Anna | 8/10 | 5875 days | 1% |
| Abigail | 7/10 | 5875 days | 1% |
| lannie | 7/10 | 5884 days | 1% |
| SimonR | 8/10 | 5885 days | 1% |
| SonjaG | 7/10 | 5885 days | 1% |
| Chris | 8/10 | 5891 days | 1% |
| AurelieD | 8/10 | 5898 days | 1% |
| Yunker | 10/10 | 5899 days | 1% |
| Andrew | 8/10 | 5901 days | 1% |
| Erin | 9/10 | 5901 days | 1% |
| Christopher Gallaga | 8/10 | 5907 days | 1% |
| Amy | 10/10 | 5913 days | 1% |
| Shona | 8/10 | 5913 days | 1% |
| plumbaum | 9/10 | 5915 days | 1% |
| Sandra | 10/10 | 5923 days | 1% |
| Evangelista | 8/10 | 5923 days | 1% |
| Oliver | 5/10 | 5925 days | 1% |
| Kat | 9/10 | 5955 days | 1% |
| Lisa | 8/10 | 5982 days | 1% |
| siobhan | 8/10 | 5984 days | 1% |
| Alice | 8/10 | 5984 days | 1% |
| NORTZ | 7/10 | 6012 days | 1% |
| Stefan | 8/10 | 6014 days | 1% |
| Hugh Trenchard | 9/10 | 6031 days | 1% |
| Niamh | 4/10 | 6037 days | 0% |
| Jenny | 9/10 | 6061 days | 1% |
| Louise | 8/10 | 6070 days | 1% |
| Peddy | 10/10 | 6080 days | 1% |
| Katie Wise | 8/10 | 6083 days | 1% |
| Thomas Bachmann | 8/10 | 6099 days | 1% |
| Daniala | 8/10 | 6118 days | 1% |
| Tom Ben | 9/10 | 6222 days | 1% |
| Sarah Maudsley | 8/10 | 6237 days | 1% |
| Alan Bellerby | 8/10 | 6237 days | 1% |
| Tina Daly | 5/10 | 6243 days | 1% |
| John Woodrow | 8/10 | 6252 days | 1% |
| Ernst Seter | 9/10 | 6252 days | 1% |
| Jim Curley | 7/10 | 6263 days | 1% |
| Daniel | 7/10 | 6264 days | 1% |
| Marc Hertogs | 7/10 | 6267 days | 1% |
| Laura Sutton | 5/10 | 6291 days | 1% |
| Jeroen | 5/10 | 6293 days | 1% |
| Mum! | 6/10 | 6293 days | 1% |
| Gail | 9/10 | 6297 days | 1% |
| Heike Julia | 6/10 | 6298 days | 1% |
| Lanni | 8/10 | 6298 days | 1% |
| Amanda Finger | 7/10 | 6299 days | 1% |
| Desiree Muri | 7/10 | 6299 days | 1% |
| Jan Grzejik | 8/10 | 6326 days | 1% |
| Wouter Ewalts | 8/10 | 6333 days | 1% |
| Matilde | 6/10 | 6341 days | 1% |
| Kim | 6/10 | 6538 days | 1% |
| Gillian | 8/10 | 6580 days | 1% |
| Denise Nick | 6/10 | 6590 days | 1% |
| ranker_110 | 8/10 | 6609 days | 1% |
| Jasper | 7/10 | 6616 days | 1% |
| Mary | 8/10 | 6616 days | 1% |
| Lucy | 6/10 | 6616 days | 1% |
| Lukas | 8/10 | 6627 days | 1% |
| Hanna | 7/10 | 6629 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
-3.61% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 62 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 | -3.55% |
| 198 | -3.57% |
| 199 | -3.59% |
| 200 | -3.61% |
| 201 | -3.62% |
| 202 | -3.64% |
| 203 | -3.66% |
| … | … |
Balancing Adjustment
5.97% 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.