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
75.47%
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 | 143 days | 100% |
| Anne | 7/10 | 478 days | 88% |
| ros fraser | 4/10 | 2488 days | 3% |
| wynden | 1/10 | 2516 days | 2% |
| Rado Hank | 10/10 | 2603 days | 4% |
| Lizzie Edmonds | 8/10 | 2604 days | 4% |
| Anis Quentin | 7/10 | 2611 days | 3% |
| Jeny Smolders | 7/10 | 2615 days | 3% |
| Oscar Petersen | 8/10 | 2622 days | 4% |
| Ani | 9/10 | 2730 days | 3% |
| Martin Murlik | 8/10 | 2843 days | 3% |
| Laura | 9/10 | 2854 days | 3% |
| Melanie Farrell | 7/10 | 2862 days | 3% |
| Andy | 10/10 | 2869 days | 3% |
| Julia Achatz | 5/10 | 2883 days | 2% |
| Auba Mateos | 7/10 | 2889 days | 3% |
| Charlotte | 7/10 | 2889 days | 3% |
| Isabel Zedelius | 8/10 | 2892 days | 3% |
| Dries | 8/10 | 2932 days | 3% |
| Clarissa Glaser | 8/10 | 2933 days | 3% |
| Alna | 10/10 | 2938 days | 3% |
| Holger Worner | 9/10 | 2938 days | 3% |
| Karlee Hormell | 9/10 | 2947 days | 3% |
| Alonso | 9/10 | 2951 days | 3% |
| Rose Guillaume | 8/10 | 2954 days | 3% |
| Caroline Coudray | 8/10 | 2958 days | 3% |
| Barbara | 8/10 | 2958 days | 3% |
| Leonie Brabers | 7/10 | 2966 days | 3% |
| Bina Johansson | 10/10 | 2966 days | 3% |
| Sam Staines | 9/10 | 2970 days | 3% |
| Erik | 6/10 | 2973 days | 3% |
| Nicole Signer | 8/10 | 2980 days | 3% |
| Sam Taylor | 7/10 | 2984 days | 3% |
| Vanuxem | 8/10 | 3188 days | 2% |
| Clara Bertomeu | 10/10 | 3188 days | 3% |
| Lukas Boller | 9/10 | 3190 days | 2% |
| Mette Elholm | 7/10 | 3204 days | 2% |
| Mathilde Arp | 8/10 | 3204 days | 2% |
| Chloe and Guillame | 9/10 | 3208 days | 2% |
| Andre | 9/10 | 3210 days | 2% |
| Doerte | 10/10 | 3210 days | 2% |
| Saskia Peek | 9/10 | 3211 days | 2% |
| Erika Tarant | 8/10 | 3211 days | 2% |
| Jennifer Nguyen | 7/10 | 3212 days | 2% |
| Julie Duvert | 7/10 | 3212 days | 2% |
| Dan Ramsl | 4/10 | 3212 days | 2% |
| Lucy Mulvin | 7/10 | 3213 days | 2% |
| Fine Kochling | 9/10 | 3215 days | 2% |
| Eberhard | 9/10 | 3215 days | 2% |
| Hannes | 8/10 | 3216 days | 2% |
| Calum Penn | 9/10 | 3218 days | 2% |
| Arthur Portolleau | 6/10 | 3219 days | 2% |
| Elisabet | 10/10 | 3220 days | 2% |
| Tommy Mannien | 8/10 | 3221 days | 2% |
| Solange Bourbeois | 8/10 | 3224 days | 2% |
| Talissa Missiato | 10/10 | 3224 days | 2% |
| Severin Knegsch | 9/10 | 3225 days | 2% |
| Pierre Jouffineau | 10/10 | 3226 days | 2% |
| Lewis Whittle | 8/10 | 3228 days | 2% |
| Ben and Pauline | 8/10 | 3230 days | 2% |
| Ann-Kathrin | 7/10 | 3235 days | 2% |
| Natasha Harbinson | 10/10 | 3236 days | 2% |
| Sebastian | 2/10 | 3237 days | 1% |
| Jaquein Bucholz | 3/10 | 3237 days | 1% |
| Chiara | 7/10 | 3237 days | 2% |
| Cariotta Kemper | 3/10 | 3237 days | 1% |
| Megan Lenox | 7/10 | 3240 days | 2% |
| Max Mustermann | 8/10 | 3242 days | 2% |
| Amy Stafford | 8/10 | 3245 days | 2% |
| Carl | 7/10 | 3245 days | 2% |
| Briony | 7/10 | 3247 days | 2% |
| Melanie Kronbichler | 8/10 | 3248 days | 2% |
| Andreas Schiefer | 7/10 | 3249 days | 2% |
| Veronique Kaplan | 3/10 | 3251 days | 1% |
| Robin Ings | 6/10 | 3252 days | 2% |
| Stula Vladimir | 7/10 | 3253 days | 2% |
| David Soukal | 8/10 | 3253 days | 2% |
| Olivia Aliprandi | 7/10 | 3254 days | 2% |
| Isabelle | 2/10 | 3256 days | 1% |
| Jonathan Gourmel | 8/10 | 3256 days | 2% |
| Mikkel Palleson | 4/10 | 3259 days | 2% |
| Franziska and Sabine | 7/10 | 3260 days | 2% |
| Chloe Guerillot | 7/10 | 3260 days | 2% |
| Faye Oliver | 7/10 | 3262 days | 2% |
| Iris Kerbler | 9/10 | 3262 days | 2% |
| Til Schaebitz | 6/10 | 3263 days | 2% |
| Elisabeth Grabner | 9/10 | 3265 days | 2% |
| Berith | 10/10 | 3265 days | 2% |
| Chris Simpson | 6/10 | 3268 days | 2% |
| Pekka and Jonna | 9/10 | 3268 days | 2% |
| Jonas Hoerning | 8/10 | 3269 days | 2% |
| Nils | 10/10 | 3269 days | 2% |
| Mark Rosema | 8/10 | 3270 days | 2% |
| Lisa Huber | 10/10 | 3270 days | 2% |
| Nicola Wiggan | 9/10 | 3291 days | 2% |
| Linda and Gunther | 4/10 | 3292 days | 1% |
| Julie | 9/10 | 3293 days | 2% |
| Maria Schaer | 7/10 | 3297 days | 2% |
| Mette and Jesper | 5/10 | 3299 days | 2% |
| Pierre and Alexandra | 6/10 | 3305 days | 2% |
| Julia Waenninger | 8/10 | 3317 days | 2% |
| Sarah Boettcher | 9/10 | 3353 days | 2% |
| Suzanne Vermeulen | 6/10 | 3370 days | 2% |
| Blandine Giusti | 7/10 | 3573 days | 2% |
| Bart Hanssen | 6/10 | 3652 days | 1% |
| Astrid Egesten | 7/10 | 3703 days | 1% |
| Jean Curry | 9/10 | 3927 days | 1% |
| Carla Oyarzun | 1/10 | 3931 days | 0% |
| Philippe Chiasson | 9/10 | 3937 days | 1% |
| Helma Druyken | 4/10 | 3947 days | 1% |
| Florian Guttler | 7/10 | 3950 days | 1% |
| Casandra Prunica | 8/10 | 3951 days | 1% |
| Lauren Hedley | 7/10 | 3951 days | 1% |
| Janina Zwerver | 8/10 | 3951 days | 1% |
| Marieke Feyteres | 4/10 | 3955 days | 1% |
| van Linda Werner | 5/10 | 3955 days | 1% |
| Philip Donachie | 7/10 | 3965 days | 1% |
| Luisa Bach | 8/10 | 3965 days | 1% |
| Kristina | 7/10 | 3967 days | 1% |
| Eugen Lehner | 6/10 | 3968 days | 1% |
| Manuel Bach | 7/10 | 3968 days | 1% |
| Matthias Freiling | 2/10 | 3975 days | 0% |
| Debora Grusler | 6/10 | 3978 days | 1% |
| Andreas Brodhaeker | 8/10 | 3991 days | 1% |
| Renee van der Syde | 7/10 | 3992 days | 1% |
| Martha Horst | 8/10 | 3992 days | 1% |
| Roland Beer | 7/10 | 3996 days | 1% |
| Johanna Bak | 4/10 | 3996 days | 1% |
| Lior Bakski | 9/10 | 4006 days | 1% |
| Bet | 9/10 | 4007 days | 1% |
| Memain | 8/10 | 4280 days | 0% |
| Konza | 7/10 | 4281 days | 0% |
| Steen Rausmussen | 8/10 | 4312 days | 0% |
| David Restell | 10/10 | 4342 days | 0% |
| Christina Rodewald | 9/10 | 4347 days | 0% |
| Hanneke P | 7/10 | 4373 days | 0% |
| Kohler | 9/10 | 4393 days | 1% |
| Alexandra van den Brack | 6/10 | 4401 days | 1% |
| Paul Lawrence | 9/10 | 4402 days | 1% |
| Abby Rushmer | 7/10 | 4403 days | 1% |
| Stephan Olivier | 7/10 | 4408 days | 1% |
| Stephan Olivier | 7/10 | 4408 days | 1% |
| Faassen | 8/10 | 4412 days | 1% |
| Julie Lamart | 8/10 | 4413 days | 1% |
| Adrian Weidell | 5/10 | 4609 days | 1% |
| Jonathan Tuthill | 9/10 | 4664 days | 1% |
| A Ormsby | 10/10 | 4676 days | 1% |
| Gillian Rowe | 10/10 | 4689 days | 1% |
| Ryan Pynappels | 8/10 | 4690 days | 1% |
| Peter Dellen | 8/10 | 4691 days | 1% |
| Jorg Steffens | 8/10 | 4691 days | 1% |
| Danielle & Jobbe | 9/10 | 4693 days | 1% |
| Christina | 6/10 | 4694 days | 1% |
| Jop Veldhuis | 7/10 | 4694 days | 1% |
| Paul Weidenfeld | 8/10 | 4695 days | 1% |
| Sophie Dorrepaal | 7/10 | 4695 days | 1% |
| Fannette Peyreplane | 5/10 | 4696 days | 1% |
| Norm Cooper | 7/10 | 4700 days | 1% |
| Gloria, Rose & An | 8/10 | 4700 days | 1% |
| A Sorg | 10/10 | 4700 days | 1% |
| Samplonius | 5/10 | 4703 days | 1% |
| Petra | 10/10 | 4703 days | 1% |
| Bethany Hamilton | 8/10 | 4707 days | 1% |
| suffolkhouse69 | 9/10 | 4708 days | 1% |
| a a | 8/10 | 4739 days | 1% |
| Julia Balionis | 7/10 | 4753 days | 1% |
| Julia Hartman | 3/10 | 4754 days | 1% |
| Fabienne Indergand | 7/10 | 4774 days | 1% |
| Waldemar Schuler | 9/10 | 4786 days | 1% |
| pepette31 | 7/10 | 4861 days | 1% |
| Craig Hathaway | 9/10 | 5013 days | 1% |
| Stephane Lebel | 9/10 | 5018 days | 1% |
| Rens Hemselmans | 7/10 | 5031 days | 1% |
| Isabell | 10/10 | 5033 days | 1% |
| Holly Cave | 5/10 | 5033 days | 1% |
| J Palmer | 6/10 | 5037 days | 1% |
| Liz & Jim | 10/10 | 5039 days | 1% |
| Edgar & Marilyn Berry | 9/10 | 5041 days | 1% |
| Simon Vickers | 2/10 | 5044 days | 0% |
| Leslie | 8/10 | 5057 days | 1% |
| Jean-Francois Guilbault | 8/10 | 5058 days | 1% |
| Selina Mueller | 7/10 | 5059 days | 1% |
| Tamlin Barton | 3/10 | 5060 days | 1% |
| Cara Dungay | 8/10 | 5061 days | 1% |
| Bottcher | 10/10 | 5061 days | 1% |
| Alexandra | 10/10 | 5062 days | 1% |
| Philipp Rau | 7/10 | 5064 days | 1% |
| Dan Aldridge | 9/10 | 5066 days | 1% |
| John Allen | 8/10 | 5068 days | 1% |
| Curtis Penner | 8/10 | 5068 days | 1% |
| Brandt | 8/10 | 5070 days | 1% |
| Nadia Husain | 5/10 | 5073 days | 1% |
| T J Andrews | 6/10 | 5089 days | 1% |
| Charli Skinner | 7/10 | 5340 days | 1% |
| Carl_Larsen | 10/10 | 5349 days | 1% |
| Susan & Richard | 10/10 | 5410 days | 1% |
| Rik | 9/10 | 5411 days | 1% |
| Jonathan Martin | 7/10 | 5413 days | 1% |
| Gunda G | 9/10 | 5418 days | 1% |
| Aaron | 8/10 | 5420 days | 1% |
| Will Jemma | 6/10 | 5423 days | 1% |
| Christen Hans | 10/10 | 5424 days | 1% |
| Monica and Danie. | 7/10 | 5432 days | 1% |
| Stephen | 5/10 | 5434 days | 1% |
| Susan | 10/10 | 5434 days | 1% |
| snodge | 8/10 | 5438 days | 1% |
| Bo Moenstead | 9/10 | 5447 days | 1% |
| Alain Deslandres | 8/10 | 5451 days | 1% |
| Jakob Jurgen | 10/10 | 5452 days | 1% |
| EA Anders | 8/10 | 5455 days | 1% |
| Helen and Hans Walser | 1/10 | 5458 days | 0% |
| kevinp | 8/10 | 5481 days | 1% |
| warrenp | 9/10 | 5485 days | 1% |
| braunweiler | 9/10 | 5489 days | 1% |
| pimn | 9/10 | 5494 days | 1% |
| asiacritics | 7/10 | 5500 days | 1% |
| Chris Mackamul | 8/10 | 5507 days | 1% |
| Debbie Rathbone | 10/10 | 5507 days | 1% |
| Lisette X | 9/10 | 5508 days | 1% |
| Martin | 10/10 | 5510 days | 1% |
| Thomas Willi | 10/10 | 5510 days | 1% |
| Elodie | 7/10 | 5511 days | 1% |
| richardh | 7/10 | 5625 days | 1% |
| trvlbug | 8/10 | 5653 days | 1% |
| glennandjen | 10/10 | 5714 days | 1% |
| BryonyS | 9/10 | 5732 days | 1% |
| Marion | 9/10 | 5748 days | 1% |
| Mikey | 7/10 | 5749 days | 1% |
| Richard Komzik | 6/10 | 5750 days | 1% |
| Michael Walsall | 10/10 | 5753 days | 1% |
| Anna | 8/10 | 5768 days | 1% |
| Abigail | 7/10 | 5768 days | 1% |
| lannie | 7/10 | 5777 days | 1% |
| SimonR | 8/10 | 5778 days | 1% |
| SonjaG | 7/10 | 5778 days | 1% |
| Chris | 8/10 | 5784 days | 1% |
| AurelieD | 8/10 | 5791 days | 1% |
| Yunker | 10/10 | 5792 days | 1% |
| Andrew | 8/10 | 5794 days | 1% |
| Erin | 9/10 | 5794 days | 1% |
| Christopher Gallaga | 8/10 | 5800 days | 1% |
| Amy | 10/10 | 5806 days | 1% |
| Shona | 8/10 | 5806 days | 1% |
| plumbaum | 9/10 | 5808 days | 1% |
| Sandra | 10/10 | 5816 days | 1% |
| Evangelista | 8/10 | 5816 days | 1% |
| Oliver | 5/10 | 5818 days | 1% |
| Kat | 9/10 | 5848 days | 1% |
| Lisa | 8/10 | 5875 days | 1% |
| siobhan | 8/10 | 5877 days | 1% |
| Alice | 8/10 | 5877 days | 1% |
| NORTZ | 7/10 | 5905 days | 1% |
| Stefan | 8/10 | 5907 days | 1% |
| Hugh Trenchard | 9/10 | 5924 days | 1% |
| Niamh | 4/10 | 5930 days | 1% |
| Jenny | 9/10 | 5954 days | 1% |
| Louise | 8/10 | 5963 days | 1% |
| Peddy | 10/10 | 5973 days | 1% |
| Katie Wise | 8/10 | 5976 days | 1% |
| Thomas Bachmann | 8/10 | 5992 days | 1% |
| Daniala | 8/10 | 6011 days | 1% |
| Tom Ben | 9/10 | 6115 days | 1% |
| Sarah Maudsley | 8/10 | 6130 days | 1% |
| Alan Bellerby | 8/10 | 6130 days | 1% |
| Tina Daly | 5/10 | 6136 days | 1% |
| John Woodrow | 8/10 | 6145 days | 1% |
| Ernst Seter | 9/10 | 6145 days | 1% |
| Jim Curley | 7/10 | 6156 days | 1% |
| Daniel | 7/10 | 6157 days | 1% |
| Marc Hertogs | 7/10 | 6160 days | 1% |
| Laura Sutton | 5/10 | 6184 days | 1% |
| Jeroen | 5/10 | 6186 days | 1% |
| Mum! | 6/10 | 6186 days | 1% |
| Gail | 9/10 | 6190 days | 1% |
| Heike Julia | 6/10 | 6191 days | 1% |
| Lanni | 8/10 | 6191 days | 1% |
| Amanda Finger | 7/10 | 6192 days | 1% |
| Desiree Muri | 7/10 | 6192 days | 1% |
| Jan Grzejik | 8/10 | 6219 days | 1% |
| Wouter Ewalts | 8/10 | 6226 days | 1% |
| Matilde | 6/10 | 6234 days | 1% |
| Kim | 6/10 | 6431 days | 1% |
| Gillian | 8/10 | 6473 days | 1% |
| Denise Nick | 6/10 | 6483 days | 1% |
| ranker_110 | 8/10 | 6502 days | 1% |
| Jasper | 7/10 | 6509 days | 1% |
| Mary | 8/10 | 6509 days | 1% |
| Lucy | 6/10 | 6509 days | 1% |
| Lukas | 8/10 | 6520 days | 1% |
| Hanna | 7/10 | 6522 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
-2.58% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 41 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 128 days. Adjustments are according to the following table.
| Days | Adjustment |
|---|---|
| … | … |
| 125 | -2.52% |
| 126 | -2.54% |
| 127 | -2.56% |
| 128 | -2.58% |
| 129 | -2.60% |
| 130 | -2.62% |
| 131 | -2.64% |
| … | … |
Balancing Adjustment
5.54% 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.