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.
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 | 109 days | 100% |
| Anne | 7/10 | 444 days | 89% |
| ros fraser | 4/10 | 2454 days | 3% |
| wynden | 1/10 | 2482 days | 2% |
| Rado Hank | 10/10 | 2569 days | 4% |
| Lizzie Edmonds | 8/10 | 2570 days | 4% |
| Anis Quentin | 7/10 | 2577 days | 4% |
| Jeny Smolders | 7/10 | 2581 days | 4% |
| Oscar Petersen | 8/10 | 2588 days | 4% |
| Ani | 9/10 | 2697 days | 4% |
| Martin Murlik | 8/10 | 2809 days | 3% |
| Laura | 9/10 | 2820 days | 3% |
| Melanie Farrell | 7/10 | 2828 days | 3% |
| Andy | 10/10 | 2835 days | 3% |
| Julia Achatz | 5/10 | 2849 days | 2% |
| Auba Mateos | 7/10 | 2855 days | 3% |
| Charlotte | 7/10 | 2855 days | 3% |
| Isabel Zedelius | 8/10 | 2858 days | 3% |
| Dries | 8/10 | 2898 days | 3% |
| Clarissa Glaser | 8/10 | 2899 days | 3% |
| Alna | 10/10 | 2904 days | 3% |
| Holger Worner | 9/10 | 2904 days | 3% |
| Karlee Hormell | 9/10 | 2913 days | 3% |
| Alonso | 9/10 | 2917 days | 3% |
| Rose Guillaume | 8/10 | 2920 days | 3% |
| Caroline Coudray | 8/10 | 2924 days | 3% |
| Barbara | 8/10 | 2924 days | 3% |
| Leonie Brabers | 7/10 | 2932 days | 3% |
| Bina Johansson | 10/10 | 2932 days | 3% |
| Sam Staines | 9/10 | 2936 days | 3% |
| Erik | 6/10 | 2939 days | 3% |
| Nicole Signer | 8/10 | 2946 days | 3% |
| Sam Taylor | 7/10 | 2950 days | 3% |
| Vanuxem | 8/10 | 3154 days | 3% |
| Clara Bertomeu | 10/10 | 3154 days | 3% |
| Lukas Boller | 9/10 | 3156 days | 3% |
| Mette Elholm | 7/10 | 3170 days | 2% |
| Mathilde Arp | 8/10 | 3170 days | 3% |
| Chloe and Guillame | 9/10 | 3174 days | 3% |
| Andre | 9/10 | 3176 days | 3% |
| Doerte | 10/10 | 3176 days | 3% |
| Saskia Peek | 9/10 | 3177 days | 3% |
| Erika Tarant | 8/10 | 3177 days | 2% |
| Jennifer Nguyen | 7/10 | 3178 days | 2% |
| Julie Duvert | 7/10 | 3178 days | 2% |
| Dan Ramsl | 4/10 | 3178 days | 2% |
| Lucy Mulvin | 7/10 | 3179 days | 2% |
| Fine Kochling | 9/10 | 3181 days | 3% |
| Eberhard | 9/10 | 3181 days | 3% |
| Hannes | 8/10 | 3182 days | 2% |
| Calum Penn | 9/10 | 3184 days | 3% |
| Arthur Portolleau | 6/10 | 3185 days | 2% |
| Elisabet | 10/10 | 3186 days | 3% |
| Tommy Mannien | 8/10 | 3187 days | 2% |
| Solange Bourbeois | 8/10 | 3190 days | 2% |
| Talissa Missiato | 10/10 | 3190 days | 3% |
| Severin Knegsch | 9/10 | 3191 days | 2% |
| Pierre Jouffineau | 10/10 | 3192 days | 3% |
| Lewis Whittle | 8/10 | 3194 days | 2% |
| Ben and Pauline | 8/10 | 3196 days | 2% |
| Ann-Kathrin | 7/10 | 3201 days | 2% |
| Natasha Harbinson | 10/10 | 3202 days | 2% |
| Sebastian | 2/10 | 3203 days | 1% |
| Jaquein Bucholz | 3/10 | 3203 days | 1% |
| Chiara | 7/10 | 3203 days | 2% |
| Cariotta Kemper | 3/10 | 3203 days | 1% |
| Megan Lenox | 7/10 | 3206 days | 2% |
| Max Mustermann | 8/10 | 3208 days | 2% |
| Amy Stafford | 8/10 | 3211 days | 2% |
| Carl | 7/10 | 3211 days | 2% |
| Briony | 7/10 | 3213 days | 2% |
| Melanie Kronbichler | 8/10 | 3214 days | 2% |
| Andreas Schiefer | 7/10 | 3215 days | 2% |
| Veronique Kaplan | 3/10 | 3217 days | 1% |
| Robin Ings | 6/10 | 3218 days | 2% |
| Stula Vladimir | 7/10 | 3219 days | 2% |
| David Soukal | 8/10 | 3219 days | 2% |
| Olivia Aliprandi | 7/10 | 3220 days | 2% |
| Isabelle | 2/10 | 3222 days | 1% |
| Jonathan Gourmel | 8/10 | 3222 days | 2% |
| Mikkel Palleson | 4/10 | 3225 days | 2% |
| Franziska and Sabine | 7/10 | 3226 days | 2% |
| Chloe Guerillot | 7/10 | 3226 days | 2% |
| Faye Oliver | 7/10 | 3228 days | 2% |
| Iris Kerbler | 9/10 | 3228 days | 2% |
| Til Schaebitz | 6/10 | 3229 days | 2% |
| Elisabeth Grabner | 9/10 | 3231 days | 2% |
| Berith | 10/10 | 3231 days | 2% |
| Chris Simpson | 6/10 | 3234 days | 2% |
| Pekka and Jonna | 9/10 | 3234 days | 2% |
| Jonas Hoerning | 8/10 | 3235 days | 2% |
| Nils | 10/10 | 3235 days | 2% |
| Mark Rosema | 8/10 | 3236 days | 2% |
| Lisa Huber | 10/10 | 3236 days | 2% |
| Nicola Wiggan | 9/10 | 3257 days | 2% |
| Linda and Gunther | 4/10 | 3258 days | 2% |
| Julie | 9/10 | 3259 days | 2% |
| Maria Schaer | 7/10 | 3263 days | 2% |
| Mette and Jesper | 5/10 | 3265 days | 2% |
| Pierre and Alexandra | 6/10 | 3271 days | 2% |
| Julia Waenninger | 8/10 | 3283 days | 2% |
| Sarah Boettcher | 9/10 | 3319 days | 2% |
| Suzanne Vermeulen | 6/10 | 3336 days | 2% |
| Blandine Giusti | 7/10 | 3539 days | 2% |
| Bart Hanssen | 6/10 | 3618 days | 1% |
| Astrid Egesten | 7/10 | 3670 days | 1% |
| Jean Curry | 9/10 | 3893 days | 1% |
| Carla Oyarzun | 1/10 | 3897 days | 0% |
| Philippe Chiasson | 9/10 | 3903 days | 1% |
| Helma Druyken | 4/10 | 3913 days | 1% |
| Florian Guttler | 7/10 | 3916 days | 1% |
| Casandra Prunica | 8/10 | 3917 days | 1% |
| Lauren Hedley | 7/10 | 3917 days | 1% |
| Janina Zwerver | 8/10 | 3917 days | 1% |
| Marieke Feyteres | 4/10 | 3921 days | 1% |
| van Linda Werner | 5/10 | 3921 days | 1% |
| Philip Donachie | 7/10 | 3931 days | 1% |
| Luisa Bach | 8/10 | 3931 days | 1% |
| Kristina | 7/10 | 3933 days | 1% |
| Eugen Lehner | 6/10 | 3934 days | 1% |
| Manuel Bach | 7/10 | 3934 days | 1% |
| Matthias Freiling | 2/10 | 3941 days | 0% |
| Debora Grusler | 6/10 | 3944 days | 1% |
| Andreas Brodhaeker | 8/10 | 3957 days | 1% |
| Renee van der Syde | 7/10 | 3958 days | 1% |
| Martha Horst | 8/10 | 3958 days | 1% |
| Roland Beer | 7/10 | 3962 days | 1% |
| Johanna Bak | 4/10 | 3962 days | 1% |
| Lior Bakski | 9/10 | 3972 days | 1% |
| Bet | 9/10 | 3973 days | 1% |
| Memain | 8/10 | 4246 days | 0% |
| Konza | 7/10 | 4247 days | 0% |
| Steen Rausmussen | 8/10 | 4278 days | 0% |
| David Restell | 10/10 | 4308 days | 0% |
| Christina Rodewald | 9/10 | 4313 days | 0% |
| Hanneke P | 7/10 | 4339 days | 0% |
| Kohler | 9/10 | 4359 days | 0% |
| Alexandra van den Brack | 6/10 | 4367 days | 0% |
| Paul Lawrence | 9/10 | 4368 days | 0% |
| Abby Rushmer | 7/10 | 4369 days | 0% |
| Stephan Olivier | 7/10 | 4374 days | 0% |
| Stephan Olivier | 7/10 | 4374 days | 0% |
| Faassen | 8/10 | 4378 days | 0% |
| Julie Lamart | 8/10 | 4379 days | 0% |
| Adrian Weidell | 5/10 | 4575 days | 1% |
| Jonathan Tuthill | 9/10 | 4630 days | 1% |
| A Ormsby | 10/10 | 4642 days | 1% |
| Gillian Rowe | 10/10 | 4655 days | 1% |
| Ryan Pynappels | 8/10 | 4656 days | 1% |
| Peter Dellen | 8/10 | 4657 days | 1% |
| Jorg Steffens | 8/10 | 4657 days | 1% |
| Danielle & Jobbe | 9/10 | 4659 days | 1% |
| Christina | 6/10 | 4660 days | 1% |
| Jop Veldhuis | 7/10 | 4660 days | 1% |
| Paul Weidenfeld | 8/10 | 4661 days | 1% |
| Sophie Dorrepaal | 7/10 | 4661 days | 1% |
| Fannette Peyreplane | 5/10 | 4662 days | 1% |
| Norm Cooper | 7/10 | 4666 days | 1% |
| Gloria, Rose & An | 8/10 | 4666 days | 1% |
| A Sorg | 10/10 | 4666 days | 1% |
| Samplonius | 5/10 | 4669 days | 1% |
| Petra | 10/10 | 4669 days | 1% |
| Bethany Hamilton | 8/10 | 4673 days | 1% |
| suffolkhouse69 | 9/10 | 4674 days | 1% |
| a a | 8/10 | 4705 days | 1% |
| Julia Balionis | 7/10 | 4719 days | 1% |
| Julia Hartman | 3/10 | 4720 days | 1% |
| Fabienne Indergand | 7/10 | 4740 days | 1% |
| Waldemar Schuler | 9/10 | 4752 days | 1% |
| pepette31 | 7/10 | 4827 days | 1% |
| Craig Hathaway | 9/10 | 4979 days | 1% |
| Stephane Lebel | 9/10 | 4984 days | 1% |
| Rens Hemselmans | 7/10 | 4997 days | 1% |
| Isabell | 10/10 | 4999 days | 1% |
| Holly Cave | 5/10 | 4999 days | 1% |
| J Palmer | 6/10 | 5003 days | 1% |
| Liz & Jim | 10/10 | 5005 days | 1% |
| Edgar & Marilyn Berry | 9/10 | 5007 days | 1% |
| Simon Vickers | 2/10 | 5010 days | 0% |
| Leslie | 8/10 | 5023 days | 1% |
| Jean-Francois Guilbault | 8/10 | 5024 days | 1% |
| Selina Mueller | 7/10 | 5025 days | 1% |
| Tamlin Barton | 3/10 | 5026 days | 1% |
| Cara Dungay | 8/10 | 5027 days | 1% |
| Bottcher | 10/10 | 5027 days | 1% |
| Alexandra | 10/10 | 5028 days | 1% |
| Philipp Rau | 7/10 | 5030 days | 1% |
| Dan Aldridge | 9/10 | 5032 days | 1% |
| John Allen | 8/10 | 5034 days | 1% |
| Curtis Penner | 8/10 | 5034 days | 1% |
| Brandt | 8/10 | 5036 days | 1% |
| Nadia Husain | 5/10 | 5039 days | 1% |
| T J Andrews | 6/10 | 5055 days | 1% |
| Charli Skinner | 7/10 | 5306 days | 1% |
| Carl_Larsen | 10/10 | 5315 days | 1% |
| Susan & Richard | 10/10 | 5376 days | 1% |
| Rik | 9/10 | 5377 days | 1% |
| Jonathan Martin | 7/10 | 5379 days | 1% |
| Gunda G | 9/10 | 5384 days | 1% |
| Aaron | 8/10 | 5386 days | 1% |
| Will Jemma | 6/10 | 5389 days | 1% |
| Christen Hans | 10/10 | 5390 days | 1% |
| Monica and Danie. | 7/10 | 5398 days | 1% |
| Stephen | 5/10 | 5400 days | 1% |
| Susan | 10/10 | 5400 days | 1% |
| snodge | 8/10 | 5404 days | 1% |
| Bo Moenstead | 9/10 | 5413 days | 1% |
| Alain Deslandres | 8/10 | 5417 days | 1% |
| Jakob Jurgen | 10/10 | 5418 days | 1% |
| EA Anders | 8/10 | 5421 days | 1% |
| Helen and Hans Walser | 1/10 | 5424 days | 0% |
| kevinp | 8/10 | 5447 days | 1% |
| warrenp | 9/10 | 5451 days | 1% |
| braunweiler | 9/10 | 5455 days | 1% |
| pimn | 9/10 | 5460 days | 1% |
| asiacritics | 7/10 | 5466 days | 1% |
| Chris Mackamul | 8/10 | 5473 days | 1% |
| Debbie Rathbone | 10/10 | 5473 days | 1% |
| Lisette X | 9/10 | 5474 days | 1% |
| Martin | 10/10 | 5476 days | 1% |
| Thomas Willi | 10/10 | 5476 days | 1% |
| Elodie | 7/10 | 5477 days | 1% |
| richardh | 7/10 | 5591 days | 1% |
| trvlbug | 8/10 | 5619 days | 1% |
| glennandjen | 10/10 | 5680 days | 1% |
| BryonyS | 9/10 | 5698 days | 1% |
| Marion | 9/10 | 5715 days | 1% |
| Mikey | 7/10 | 5715 days | 1% |
| Richard Komzik | 6/10 | 5716 days | 1% |
| Michael Walsall | 10/10 | 5720 days | 1% |
| Anna | 8/10 | 5735 days | 1% |
| Abigail | 7/10 | 5735 days | 1% |
| lannie | 7/10 | 5744 days | 1% |
| SimonR | 8/10 | 5744 days | 1% |
| SonjaG | 7/10 | 5744 days | 1% |
| Chris | 8/10 | 5751 days | 1% |
| AurelieD | 8/10 | 5757 days | 1% |
| Yunker | 10/10 | 5759 days | 1% |
| Andrew | 8/10 | 5761 days | 1% |
| Erin | 9/10 | 5761 days | 1% |
| Christopher Gallaga | 8/10 | 5767 days | 1% |
| Amy | 10/10 | 5773 days | 1% |
| Shona | 8/10 | 5773 days | 1% |
| plumbaum | 9/10 | 5775 days | 1% |
| Sandra | 10/10 | 5783 days | 1% |
| Evangelista | 8/10 | 5783 days | 1% |
| Oliver | 5/10 | 5785 days | 1% |
| Kat | 9/10 | 5815 days | 1% |
| Lisa | 8/10 | 5842 days | 1% |
| siobhan | 8/10 | 5844 days | 1% |
| Alice | 8/10 | 5844 days | 1% |
| NORTZ | 7/10 | 5872 days | 1% |
| Stefan | 8/10 | 5874 days | 1% |
| Hugh Trenchard | 9/10 | 5890 days | 1% |
| Niamh | 4/10 | 5897 days | 1% |
| Jenny | 9/10 | 5921 days | 1% |
| Louise | 8/10 | 5930 days | 1% |
| Peddy | 10/10 | 5940 days | 1% |
| Katie Wise | 8/10 | 5943 days | 1% |
| Thomas Bachmann | 8/10 | 5959 days | 1% |
| Daniala | 8/10 | 5978 days | 1% |
| Tom Ben | 9/10 | 6081 days | 1% |
| Sarah Maudsley | 8/10 | 6096 days | 1% |
| Alan Bellerby | 8/10 | 6096 days | 1% |
| Tina Daly | 5/10 | 6102 days | 1% |
| John Woodrow | 8/10 | 6111 days | 1% |
| Ernst Seter | 9/10 | 6111 days | 1% |
| Jim Curley | 7/10 | 6122 days | 1% |
| Daniel | 7/10 | 6123 days | 1% |
| Marc Hertogs | 7/10 | 6126 days | 1% |
| Laura Sutton | 5/10 | 6150 days | 1% |
| Jeroen | 5/10 | 6152 days | 1% |
| Mum! | 6/10 | 6152 days | 1% |
| Gail | 9/10 | 6156 days | 1% |
| Heike Julia | 6/10 | 6157 days | 1% |
| Lanni | 8/10 | 6157 days | 1% |
| Amanda Finger | 7/10 | 6158 days | 1% |
| Desiree Muri | 7/10 | 6158 days | 1% |
| Jan Grzejik | 8/10 | 6185 days | 1% |
| Wouter Ewalts | 8/10 | 6192 days | 1% |
| Matilde | 6/10 | 6200 days | 1% |
| Kim | 6/10 | 6397 days | 1% |
| Gillian | 8/10 | 6439 days | 1% |
| Denise Nick | 6/10 | 6449 days | 1% |
| ranker_110 | 8/10 | 6468 days | 1% |
| Jasper | 7/10 | 6475 days | 1% |
| Mary | 8/10 | 6475 days | 1% |
| Lucy | 6/10 | 6475 days | 1% |
| Lukas | 8/10 | 6486 days | 1% |
| Hanna | 7/10 | 6488 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
-1.90% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 44 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 94 days. Adjustments are according to the following table.
| Days | Adjustment |
|---|---|
| … | … |
| 91 | -1.84% |
| 92 | -1.86% |
| 93 | -1.88% |
| 94 | -1.90% |
| 95 | -1.92% |
| 96 | -1.94% |
| 97 | -1.96% |
| … | … |
Balancing Adjustment
5.24% 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
79%
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.