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
75.45%
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 | 49 days | 100% |
| Anne | 7/10 | 384 days | 92% |
| ros fraser | 4/10 | 2394 days | 3% |
| wynden | 1/10 | 2422 days | 2% |
| Rado Hank | 10/10 | 2509 days | 4% |
| Lizzie Edmonds | 8/10 | 2510 days | 4% |
| Anis Quentin | 7/10 | 2517 days | 4% |
| Jeny Smolders | 7/10 | 2521 days | 4% |
| Oscar Petersen | 8/10 | 2528 days | 4% |
| Ani | 9/10 | 2637 days | 4% |
| Martin Murlik | 8/10 | 2749 days | 3% |
| Laura | 9/10 | 2760 days | 3% |
| Melanie Farrell | 7/10 | 2768 days | 3% |
| Andy | 10/10 | 2775 days | 3% |
| Julia Achatz | 5/10 | 2789 days | 2% |
| Auba Mateos | 7/10 | 2795 days | 3% |
| Charlotte | 7/10 | 2795 days | 3% |
| Isabel Zedelius | 8/10 | 2798 days | 3% |
| Dries | 8/10 | 2838 days | 3% |
| Clarissa Glaser | 8/10 | 2839 days | 3% |
| Alna | 10/10 | 2844 days | 3% |
| Holger Worner | 9/10 | 2844 days | 3% |
| Karlee Hormell | 9/10 | 2853 days | 3% |
| Alonso | 9/10 | 2857 days | 3% |
| Rose Guillaume | 8/10 | 2860 days | 3% |
| Caroline Coudray | 8/10 | 2864 days | 3% |
| Barbara | 8/10 | 2864 days | 3% |
| Leonie Brabers | 7/10 | 2872 days | 3% |
| Bina Johansson | 10/10 | 2872 days | 3% |
| Sam Staines | 9/10 | 2876 days | 3% |
| Erik | 6/10 | 2879 days | 3% |
| Nicole Signer | 8/10 | 2886 days | 3% |
| Sam Taylor | 7/10 | 2890 days | 3% |
| Vanuxem | 8/10 | 3094 days | 3% |
| Clara Bertomeu | 10/10 | 3094 days | 3% |
| Lukas Boller | 9/10 | 3096 days | 3% |
| Mette Elholm | 7/10 | 3110 days | 2% |
| Mathilde Arp | 8/10 | 3110 days | 2% |
| Chloe and Guillame | 9/10 | 3114 days | 3% |
| Andre | 9/10 | 3116 days | 3% |
| Doerte | 10/10 | 3116 days | 3% |
| Saskia Peek | 9/10 | 3117 days | 3% |
| Erika Tarant | 8/10 | 3117 days | 2% |
| Jennifer Nguyen | 7/10 | 3118 days | 2% |
| Julie Duvert | 7/10 | 3118 days | 2% |
| Dan Ramsl | 4/10 | 3118 days | 2% |
| Lucy Mulvin | 7/10 | 3119 days | 2% |
| Fine Kochling | 9/10 | 3121 days | 3% |
| Eberhard | 9/10 | 3121 days | 3% |
| Hannes | 8/10 | 3122 days | 2% |
| Calum Penn | 9/10 | 3124 days | 2% |
| Arthur Portolleau | 6/10 | 3125 days | 2% |
| Elisabet | 10/10 | 3126 days | 3% |
| Tommy Mannien | 8/10 | 3127 days | 2% |
| Solange Bourbeois | 8/10 | 3130 days | 2% |
| Talissa Missiato | 10/10 | 3130 days | 3% |
| Severin Knegsch | 9/10 | 3131 days | 2% |
| Pierre Jouffineau | 10/10 | 3132 days | 3% |
| Lewis Whittle | 8/10 | 3134 days | 2% |
| Ben and Pauline | 8/10 | 3136 days | 2% |
| Ann-Kathrin | 7/10 | 3141 days | 2% |
| Natasha Harbinson | 10/10 | 3142 days | 2% |
| Sebastian | 2/10 | 3143 days | 1% |
| Jaquein Bucholz | 3/10 | 3143 days | 1% |
| Chiara | 7/10 | 3143 days | 2% |
| Cariotta Kemper | 3/10 | 3143 days | 1% |
| Megan Lenox | 7/10 | 3146 days | 2% |
| Max Mustermann | 8/10 | 3148 days | 2% |
| Amy Stafford | 8/10 | 3151 days | 2% |
| Carl | 7/10 | 3151 days | 2% |
| Briony | 7/10 | 3153 days | 2% |
| Melanie Kronbichler | 8/10 | 3154 days | 2% |
| Andreas Schiefer | 7/10 | 3155 days | 2% |
| Veronique Kaplan | 3/10 | 3157 days | 1% |
| Robin Ings | 6/10 | 3158 days | 2% |
| Stula Vladimir | 7/10 | 3159 days | 2% |
| David Soukal | 8/10 | 3159 days | 2% |
| Olivia Aliprandi | 7/10 | 3160 days | 2% |
| Isabelle | 2/10 | 3162 days | 1% |
| Jonathan Gourmel | 8/10 | 3162 days | 2% |
| Mikkel Palleson | 4/10 | 3165 days | 2% |
| Franziska and Sabine | 7/10 | 3166 days | 2% |
| Chloe Guerillot | 7/10 | 3166 days | 2% |
| Faye Oliver | 7/10 | 3168 days | 2% |
| Iris Kerbler | 9/10 | 3168 days | 2% |
| Til Schaebitz | 6/10 | 3169 days | 2% |
| Elisabeth Grabner | 9/10 | 3171 days | 2% |
| Berith | 10/10 | 3171 days | 2% |
| Chris Simpson | 6/10 | 3174 days | 2% |
| Pekka and Jonna | 9/10 | 3174 days | 2% |
| Jonas Hoerning | 8/10 | 3175 days | 2% |
| Nils | 10/10 | 3175 days | 2% |
| Mark Rosema | 8/10 | 3176 days | 2% |
| Lisa Huber | 10/10 | 3176 days | 2% |
| Nicola Wiggan | 9/10 | 3197 days | 2% |
| Linda and Gunther | 4/10 | 3198 days | 2% |
| Julie | 9/10 | 3199 days | 2% |
| Maria Schaer | 7/10 | 3203 days | 2% |
| Mette and Jesper | 5/10 | 3205 days | 2% |
| Pierre and Alexandra | 6/10 | 3211 days | 2% |
| Julia Waenninger | 8/10 | 3223 days | 2% |
| Sarah Boettcher | 9/10 | 3259 days | 2% |
| Suzanne Vermeulen | 6/10 | 3276 days | 2% |
| Blandine Giusti | 7/10 | 3479 days | 2% |
| Bart Hanssen | 6/10 | 3558 days | 1% |
| Astrid Egesten | 7/10 | 3610 days | 1% |
| Jean Curry | 9/10 | 3833 days | 1% |
| Carla Oyarzun | 1/10 | 3837 days | 0% |
| Philippe Chiasson | 9/10 | 3843 days | 1% |
| Helma Druyken | 4/10 | 3853 days | 1% |
| Florian Guttler | 7/10 | 3856 days | 1% |
| Casandra Prunica | 8/10 | 3857 days | 1% |
| Lauren Hedley | 7/10 | 3857 days | 1% |
| Janina Zwerver | 8/10 | 3857 days | 1% |
| Marieke Feyteres | 4/10 | 3861 days | 1% |
| van Linda Werner | 5/10 | 3861 days | 1% |
| Philip Donachie | 7/10 | 3871 days | 1% |
| Luisa Bach | 8/10 | 3871 days | 1% |
| Kristina | 7/10 | 3873 days | 1% |
| Eugen Lehner | 6/10 | 3874 days | 1% |
| Manuel Bach | 7/10 | 3874 days | 1% |
| Matthias Freiling | 2/10 | 3881 days | 0% |
| Debora Grusler | 6/10 | 3884 days | 1% |
| Andreas Brodhaeker | 8/10 | 3897 days | 1% |
| Renee van der Syde | 7/10 | 3898 days | 1% |
| Martha Horst | 8/10 | 3898 days | 1% |
| Roland Beer | 7/10 | 3902 days | 1% |
| Johanna Bak | 4/10 | 3902 days | 1% |
| Lior Bakski | 9/10 | 3912 days | 1% |
| Bet | 9/10 | 3913 days | 1% |
| Memain | 8/10 | 4186 days | 0% |
| Konza | 7/10 | 4187 days | 0% |
| Steen Rausmussen | 8/10 | 4218 days | 0% |
| David Restell | 10/10 | 4248 days | 0% |
| Christina Rodewald | 9/10 | 4253 days | 0% |
| Hanneke P | 7/10 | 4279 days | 0% |
| Kohler | 9/10 | 4299 days | 0% |
| Alexandra van den Brack | 6/10 | 4307 days | 0% |
| Paul Lawrence | 9/10 | 4308 days | 0% |
| Abby Rushmer | 7/10 | 4309 days | 0% |
| Stephan Olivier | 7/10 | 4314 days | 0% |
| Stephan Olivier | 7/10 | 4314 days | 0% |
| Faassen | 8/10 | 4318 days | 0% |
| Julie Lamart | 8/10 | 4319 days | 0% |
| Adrian Weidell | 5/10 | 4515 days | 1% |
| Jonathan Tuthill | 9/10 | 4570 days | 1% |
| A Ormsby | 10/10 | 4582 days | 1% |
| Gillian Rowe | 10/10 | 4595 days | 1% |
| Ryan Pynappels | 8/10 | 4596 days | 1% |
| Peter Dellen | 8/10 | 4597 days | 1% |
| Jorg Steffens | 8/10 | 4597 days | 1% |
| Danielle & Jobbe | 9/10 | 4599 days | 1% |
| Christina | 6/10 | 4600 days | 1% |
| Jop Veldhuis | 7/10 | 4600 days | 1% |
| Paul Weidenfeld | 8/10 | 4601 days | 1% |
| Sophie Dorrepaal | 7/10 | 4601 days | 1% |
| Fannette Peyreplane | 5/10 | 4602 days | 1% |
| Norm Cooper | 7/10 | 4606 days | 1% |
| Gloria, Rose & An | 8/10 | 4606 days | 1% |
| A Sorg | 10/10 | 4606 days | 1% |
| Samplonius | 5/10 | 4609 days | 1% |
| Petra | 10/10 | 4609 days | 1% |
| Bethany Hamilton | 8/10 | 4613 days | 1% |
| suffolkhouse69 | 9/10 | 4614 days | 1% |
| a a | 8/10 | 4645 days | 1% |
| Julia Balionis | 7/10 | 4659 days | 1% |
| Julia Hartman | 3/10 | 4660 days | 0% |
| Fabienne Indergand | 7/10 | 4680 days | 1% |
| Waldemar Schuler | 9/10 | 4692 days | 1% |
| pepette31 | 7/10 | 4767 days | 1% |
| Craig Hathaway | 9/10 | 4919 days | 1% |
| Stephane Lebel | 9/10 | 4924 days | 1% |
| Rens Hemselmans | 7/10 | 4937 days | 1% |
| Isabell | 10/10 | 4939 days | 1% |
| Holly Cave | 5/10 | 4939 days | 1% |
| J Palmer | 6/10 | 4943 days | 1% |
| Liz & Jim | 10/10 | 4945 days | 1% |
| Edgar & Marilyn Berry | 9/10 | 4947 days | 1% |
| Simon Vickers | 2/10 | 4950 days | 0% |
| Leslie | 8/10 | 4963 days | 1% |
| Jean-Francois Guilbault | 8/10 | 4964 days | 1% |
| Selina Mueller | 7/10 | 4965 days | 1% |
| Tamlin Barton | 3/10 | 4966 days | 0% |
| Cara Dungay | 8/10 | 4967 days | 1% |
| Bottcher | 10/10 | 4967 days | 1% |
| Alexandra | 10/10 | 4968 days | 1% |
| Philipp Rau | 7/10 | 4970 days | 1% |
| Dan Aldridge | 9/10 | 4972 days | 1% |
| John Allen | 8/10 | 4974 days | 1% |
| Curtis Penner | 8/10 | 4974 days | 1% |
| Brandt | 8/10 | 4976 days | 1% |
| Nadia Husain | 5/10 | 4979 days | 1% |
| T J Andrews | 6/10 | 4995 days | 1% |
| Charli Skinner | 7/10 | 5246 days | 1% |
| Carl_Larsen | 10/10 | 5255 days | 1% |
| Susan & Richard | 10/10 | 5316 days | 1% |
| Rik | 9/10 | 5317 days | 1% |
| Jonathan Martin | 7/10 | 5319 days | 1% |
| Gunda G | 9/10 | 5324 days | 1% |
| Aaron | 8/10 | 5326 days | 1% |
| Will Jemma | 6/10 | 5329 days | 1% |
| Christen Hans | 10/10 | 5330 days | 1% |
| Monica and Danie. | 7/10 | 5338 days | 1% |
| Stephen | 5/10 | 5340 days | 1% |
| Susan | 10/10 | 5340 days | 1% |
| snodge | 8/10 | 5344 days | 1% |
| Bo Moenstead | 9/10 | 5353 days | 1% |
| Alain Deslandres | 8/10 | 5357 days | 1% |
| Jakob Jurgen | 10/10 | 5358 days | 1% |
| EA Anders | 8/10 | 5361 days | 1% |
| Helen and Hans Walser | 1/10 | 5364 days | 0% |
| kevinp | 8/10 | 5387 days | 1% |
| warrenp | 9/10 | 5391 days | 1% |
| braunweiler | 9/10 | 5395 days | 1% |
| pimn | 9/10 | 5400 days | 1% |
| asiacritics | 7/10 | 5406 days | 1% |
| Chris Mackamul | 8/10 | 5413 days | 1% |
| Debbie Rathbone | 10/10 | 5413 days | 1% |
| Lisette X | 9/10 | 5414 days | 1% |
| Martin | 10/10 | 5416 days | 1% |
| Thomas Willi | 10/10 | 5416 days | 1% |
| Elodie | 7/10 | 5417 days | 1% |
| richardh | 7/10 | 5531 days | 1% |
| trvlbug | 8/10 | 5559 days | 1% |
| glennandjen | 10/10 | 5620 days | 1% |
| BryonyS | 9/10 | 5638 days | 1% |
| Marion | 9/10 | 5655 days | 1% |
| Mikey | 7/10 | 5655 days | 1% |
| Richard Komzik | 6/10 | 5656 days | 1% |
| Michael Walsall | 10/10 | 5660 days | 1% |
| Anna | 8/10 | 5674 days | 1% |
| Abigail | 7/10 | 5674 days | 1% |
| lannie | 7/10 | 5684 days | 1% |
| SimonR | 8/10 | 5684 days | 1% |
| SonjaG | 7/10 | 5684 days | 1% |
| Chris | 8/10 | 5691 days | 1% |
| AurelieD | 8/10 | 5697 days | 1% |
| Yunker | 10/10 | 5699 days | 1% |
| Andrew | 8/10 | 5701 days | 1% |
| Erin | 9/10 | 5701 days | 1% |
| Christopher Gallaga | 8/10 | 5707 days | 1% |
| Amy | 10/10 | 5712 days | 1% |
| Shona | 8/10 | 5713 days | 1% |
| plumbaum | 9/10 | 5715 days | 1% |
| Sandra | 10/10 | 5723 days | 1% |
| Evangelista | 8/10 | 5723 days | 1% |
| Oliver | 5/10 | 5725 days | 1% |
| Kat | 9/10 | 5755 days | 1% |
| Lisa | 8/10 | 5782 days | 1% |
| siobhan | 8/10 | 5784 days | 1% |
| Alice | 8/10 | 5784 days | 1% |
| NORTZ | 7/10 | 5812 days | 1% |
| Stefan | 8/10 | 5814 days | 1% |
| Hugh Trenchard | 9/10 | 5830 days | 1% |
| Niamh | 4/10 | 5837 days | 1% |
| Jenny | 9/10 | 5861 days | 1% |
| Louise | 8/10 | 5870 days | 1% |
| Peddy | 10/10 | 5880 days | 1% |
| Katie Wise | 8/10 | 5883 days | 1% |
| Thomas Bachmann | 8/10 | 5899 days | 1% |
| Daniala | 8/10 | 5918 days | 1% |
| Tom Ben | 9/10 | 6021 days | 1% |
| Sarah Maudsley | 8/10 | 6036 days | 1% |
| Alan Bellerby | 8/10 | 6036 days | 1% |
| Tina Daly | 5/10 | 6042 days | 1% |
| John Woodrow | 8/10 | 6051 days | 1% |
| Ernst Seter | 9/10 | 6051 days | 1% |
| Jim Curley | 7/10 | 6062 days | 1% |
| Daniel | 7/10 | 6063 days | 1% |
| Marc Hertogs | 7/10 | 6066 days | 1% |
| Laura Sutton | 5/10 | 6090 days | 1% |
| Jeroen | 5/10 | 6092 days | 1% |
| Mum! | 6/10 | 6092 days | 1% |
| Gail | 9/10 | 6096 days | 1% |
| Heike Julia | 6/10 | 6097 days | 1% |
| Lanni | 8/10 | 6097 days | 1% |
| Amanda Finger | 7/10 | 6098 days | 1% |
| Desiree Muri | 7/10 | 6098 days | 1% |
| Jan Grzejik | 8/10 | 6125 days | 1% |
| Wouter Ewalts | 8/10 | 6132 days | 1% |
| Matilde | 6/10 | 6140 days | 1% |
| Kim | 6/10 | 6337 days | 1% |
| Gillian | 8/10 | 6379 days | 1% |
| Denise Nick | 6/10 | 6389 days | 1% |
| ranker_110 | 8/10 | 6408 days | 1% |
| Jasper | 7/10 | 6415 days | 1% |
| Mary | 8/10 | 6415 days | 1% |
| Lucy | 6/10 | 6415 days | 1% |
| Lukas | 8/10 | 6426 days | 1% |
| Hanna | 7/10 | 6428 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
-0.51% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 75 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 34 days. Adjustments are according to the following table.
| Days | Adjustment |
|---|---|
| … | … |
| 31 | -0.47% |
| 32 | -0.48% |
| 33 | -0.50% |
| 34 | -0.51% |
| 35 | -0.53% |
| 36 | -0.55% |
| 37 | -0.56% |
| … | … |
Balancing Adjustment
4.67% 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
80%
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.