Kia ora, 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
75.54%
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 | 183 days | 100% |
| Anne | 7/10 | 518 days | 86% |
| ros fraser | 4/10 | 2528 days | 3% |
| wynden | 1/10 | 2556 days | 2% |
| Rado Hank | 10/10 | 2643 days | 4% |
| Lizzie Edmonds | 8/10 | 2644 days | 4% |
| Anis Quentin | 7/10 | 2651 days | 3% |
| Jeny Smolders | 7/10 | 2655 days | 3% |
| Oscar Petersen | 8/10 | 2662 days | 4% |
| Ani | 9/10 | 2770 days | 3% |
| Martin Murlik | 8/10 | 2883 days | 3% |
| Laura | 9/10 | 2894 days | 3% |
| Melanie Farrell | 7/10 | 2902 days | 3% |
| Andy | 10/10 | 2909 days | 3% |
| Julia Achatz | 5/10 | 2923 days | 2% |
| Auba Mateos | 7/10 | 2929 days | 3% |
| Charlotte | 7/10 | 2929 days | 3% |
| Isabel Zedelius | 8/10 | 2932 days | 3% |
| Dries | 8/10 | 2972 days | 3% |
| Clarissa Glaser | 8/10 | 2973 days | 3% |
| Alna | 10/10 | 2978 days | 3% |
| Holger Worner | 9/10 | 2978 days | 3% |
| Karlee Hormell | 9/10 | 2987 days | 3% |
| Alonso | 9/10 | 2991 days | 3% |
| Rose Guillaume | 8/10 | 2994 days | 3% |
| Caroline Coudray | 8/10 | 2998 days | 3% |
| Barbara | 8/10 | 2998 days | 3% |
| Leonie Brabers | 7/10 | 3006 days | 3% |
| Bina Johansson | 10/10 | 3006 days | 3% |
| Sam Staines | 9/10 | 3010 days | 3% |
| Erik | 6/10 | 3013 days | 2% |
| Nicole Signer | 8/10 | 3020 days | 3% |
| Sam Taylor | 7/10 | 3024 days | 3% |
| Vanuxem | 8/10 | 3228 days | 2% |
| Clara Bertomeu | 10/10 | 3228 days | 2% |
| Lukas Boller | 9/10 | 3230 days | 2% |
| Mette Elholm | 7/10 | 3244 days | 2% |
| Mathilde Arp | 8/10 | 3244 days | 2% |
| Chloe and Guillame | 9/10 | 3248 days | 2% |
| Andre | 9/10 | 3250 days | 2% |
| Doerte | 10/10 | 3250 days | 2% |
| Saskia Peek | 9/10 | 3251 days | 2% |
| Erika Tarant | 8/10 | 3251 days | 2% |
| Jennifer Nguyen | 7/10 | 3252 days | 2% |
| Julie Duvert | 7/10 | 3252 days | 2% |
| Dan Ramsl | 4/10 | 3252 days | 2% |
| Lucy Mulvin | 7/10 | 3253 days | 2% |
| Fine Kochling | 9/10 | 3255 days | 2% |
| Eberhard | 9/10 | 3255 days | 2% |
| Hannes | 8/10 | 3256 days | 2% |
| Calum Penn | 9/10 | 3258 days | 2% |
| Arthur Portolleau | 6/10 | 3259 days | 2% |
| Elisabet | 10/10 | 3260 days | 2% |
| Tommy Mannien | 8/10 | 3261 days | 2% |
| Solange Bourbeois | 8/10 | 3264 days | 2% |
| Talissa Missiato | 10/10 | 3264 days | 2% |
| Severin Knegsch | 9/10 | 3265 days | 2% |
| Pierre Jouffineau | 10/10 | 3266 days | 2% |
| Lewis Whittle | 8/10 | 3268 days | 2% |
| Ben and Pauline | 8/10 | 3270 days | 2% |
| Ann-Kathrin | 7/10 | 3275 days | 2% |
| Natasha Harbinson | 10/10 | 3276 days | 2% |
| Sebastian | 2/10 | 3277 days | 1% |
| Jaquein Bucholz | 3/10 | 3277 days | 1% |
| Chiara | 7/10 | 3277 days | 2% |
| Cariotta Kemper | 3/10 | 3277 days | 1% |
| Megan Lenox | 7/10 | 3280 days | 2% |
| Max Mustermann | 8/10 | 3282 days | 2% |
| Amy Stafford | 8/10 | 3285 days | 2% |
| Carl | 7/10 | 3285 days | 2% |
| Briony | 7/10 | 3287 days | 2% |
| Melanie Kronbichler | 8/10 | 3288 days | 2% |
| Andreas Schiefer | 7/10 | 3289 days | 2% |
| Veronique Kaplan | 3/10 | 3291 days | 1% |
| Robin Ings | 6/10 | 3292 days | 2% |
| Stula Vladimir | 7/10 | 3293 days | 2% |
| David Soukal | 8/10 | 3293 days | 2% |
| Olivia Aliprandi | 7/10 | 3294 days | 2% |
| Isabelle | 2/10 | 3296 days | 1% |
| Jonathan Gourmel | 8/10 | 3296 days | 2% |
| Mikkel Palleson | 4/10 | 3299 days | 1% |
| Franziska and Sabine | 7/10 | 3300 days | 2% |
| Chloe Guerillot | 7/10 | 3300 days | 2% |
| Faye Oliver | 7/10 | 3302 days | 2% |
| Iris Kerbler | 9/10 | 3302 days | 2% |
| Til Schaebitz | 6/10 | 3303 days | 2% |
| Elisabeth Grabner | 9/10 | 3305 days | 2% |
| Berith | 10/10 | 3305 days | 2% |
| Chris Simpson | 6/10 | 3308 days | 2% |
| Pekka and Jonna | 9/10 | 3308 days | 2% |
| Jonas Hoerning | 8/10 | 3309 days | 2% |
| Nils | 10/10 | 3309 days | 2% |
| Mark Rosema | 8/10 | 3310 days | 2% |
| Lisa Huber | 10/10 | 3310 days | 2% |
| Nicola Wiggan | 9/10 | 3331 days | 2% |
| Linda and Gunther | 4/10 | 3332 days | 1% |
| Julie | 9/10 | 3333 days | 2% |
| Maria Schaer | 7/10 | 3337 days | 2% |
| Mette and Jesper | 5/10 | 3339 days | 2% |
| Pierre and Alexandra | 6/10 | 3345 days | 2% |
| Julia Waenninger | 8/10 | 3357 days | 2% |
| Sarah Boettcher | 9/10 | 3393 days | 2% |
| Suzanne Vermeulen | 6/10 | 3410 days | 2% |
| Blandine Giusti | 7/10 | 3613 days | 1% |
| Bart Hanssen | 6/10 | 3692 days | 1% |
| Astrid Egesten | 7/10 | 3743 days | 1% |
| Jean Curry | 9/10 | 3967 days | 1% |
| Carla Oyarzun | 1/10 | 3971 days | 0% |
| Philippe Chiasson | 9/10 | 3977 days | 1% |
| Helma Druyken | 4/10 | 3987 days | 0% |
| Florian Guttler | 7/10 | 3990 days | 1% |
| Casandra Prunica | 8/10 | 3991 days | 1% |
| Lauren Hedley | 7/10 | 3991 days | 1% |
| Janina Zwerver | 8/10 | 3991 days | 1% |
| Marieke Feyteres | 4/10 | 3995 days | 0% |
| van Linda Werner | 5/10 | 3995 days | 1% |
| Philip Donachie | 7/10 | 4005 days | 1% |
| Luisa Bach | 8/10 | 4005 days | 1% |
| Kristina | 7/10 | 4007 days | 1% |
| Eugen Lehner | 6/10 | 4008 days | 1% |
| Manuel Bach | 7/10 | 4008 days | 1% |
| Matthias Freiling | 2/10 | 4015 days | 0% |
| Debora Grusler | 6/10 | 4018 days | 1% |
| Andreas Brodhaeker | 8/10 | 4031 days | 1% |
| Renee van der Syde | 7/10 | 4032 days | 1% |
| Martha Horst | 8/10 | 4032 days | 1% |
| Roland Beer | 7/10 | 4036 days | 1% |
| Johanna Bak | 4/10 | 4036 days | 0% |
| Lior Bakski | 9/10 | 4046 days | 1% |
| Bet | 9/10 | 4047 days | 1% |
| Memain | 8/10 | 4320 days | 0% |
| Konza | 7/10 | 4321 days | 0% |
| Steen Rausmussen | 8/10 | 4352 days | 0% |
| David Restell | 10/10 | 4382 days | 1% |
| Christina Rodewald | 9/10 | 4387 days | 1% |
| Hanneke P | 7/10 | 4413 days | 1% |
| Kohler | 9/10 | 4433 days | 1% |
| Alexandra van den Brack | 6/10 | 4441 days | 1% |
| Paul Lawrence | 9/10 | 4442 days | 1% |
| Abby Rushmer | 7/10 | 4443 days | 1% |
| Stephan Olivier | 7/10 | 4448 days | 1% |
| Stephan Olivier | 7/10 | 4448 days | 1% |
| Faassen | 8/10 | 4452 days | 1% |
| Julie Lamart | 8/10 | 4453 days | 1% |
| Adrian Weidell | 5/10 | 4649 days | 1% |
| Jonathan Tuthill | 9/10 | 4704 days | 1% |
| A Ormsby | 10/10 | 4716 days | 1% |
| Gillian Rowe | 10/10 | 4729 days | 1% |
| Ryan Pynappels | 8/10 | 4730 days | 1% |
| Peter Dellen | 8/10 | 4731 days | 1% |
| Jorg Steffens | 8/10 | 4731 days | 1% |
| Danielle & Jobbe | 9/10 | 4733 days | 1% |
| Christina | 6/10 | 4734 days | 1% |
| Jop Veldhuis | 7/10 | 4734 days | 1% |
| Paul Weidenfeld | 8/10 | 4735 days | 1% |
| Sophie Dorrepaal | 7/10 | 4735 days | 1% |
| Fannette Peyreplane | 5/10 | 4736 days | 1% |
| Norm Cooper | 7/10 | 4740 days | 1% |
| Gloria, Rose & An | 8/10 | 4740 days | 1% |
| A Sorg | 10/10 | 4740 days | 1% |
| Samplonius | 5/10 | 4743 days | 1% |
| Petra | 10/10 | 4743 days | 1% |
| Bethany Hamilton | 8/10 | 4747 days | 1% |
| suffolkhouse69 | 9/10 | 4748 days | 1% |
| a a | 8/10 | 4779 days | 1% |
| Julia Balionis | 7/10 | 4793 days | 1% |
| Julia Hartman | 3/10 | 4794 days | 1% |
| Fabienne Indergand | 7/10 | 4814 days | 1% |
| Waldemar Schuler | 9/10 | 4826 days | 1% |
| pepette31 | 7/10 | 4901 days | 1% |
| Craig Hathaway | 9/10 | 5053 days | 1% |
| Stephane Lebel | 9/10 | 5058 days | 1% |
| Rens Hemselmans | 7/10 | 5071 days | 1% |
| Isabell | 10/10 | 5073 days | 1% |
| Holly Cave | 5/10 | 5073 days | 1% |
| J Palmer | 6/10 | 5077 days | 1% |
| Liz & Jim | 10/10 | 5079 days | 1% |
| Edgar & Marilyn Berry | 9/10 | 5081 days | 1% |
| Simon Vickers | 2/10 | 5084 days | 0% |
| Leslie | 8/10 | 5097 days | 1% |
| Jean-Francois Guilbault | 8/10 | 5098 days | 1% |
| Selina Mueller | 7/10 | 5099 days | 1% |
| Tamlin Barton | 3/10 | 5100 days | 1% |
| Cara Dungay | 8/10 | 5101 days | 1% |
| Bottcher | 10/10 | 5101 days | 1% |
| Alexandra | 10/10 | 5102 days | 1% |
| Philipp Rau | 7/10 | 5104 days | 1% |
| Dan Aldridge | 9/10 | 5106 days | 1% |
| John Allen | 8/10 | 5108 days | 1% |
| Curtis Penner | 8/10 | 5108 days | 1% |
| Brandt | 8/10 | 5110 days | 1% |
| Nadia Husain | 5/10 | 5113 days | 1% |
| T J Andrews | 6/10 | 5129 days | 1% |
| Charli Skinner | 7/10 | 5380 days | 1% |
| Carl_Larsen | 10/10 | 5389 days | 1% |
| Susan & Richard | 10/10 | 5450 days | 1% |
| Rik | 9/10 | 5451 days | 1% |
| Jonathan Martin | 7/10 | 5453 days | 1% |
| Gunda G | 9/10 | 5458 days | 1% |
| Aaron | 8/10 | 5460 days | 1% |
| Will Jemma | 6/10 | 5463 days | 1% |
| Christen Hans | 10/10 | 5464 days | 1% |
| Monica and Danie. | 7/10 | 5472 days | 1% |
| Stephen | 5/10 | 5474 days | 1% |
| Susan | 10/10 | 5474 days | 1% |
| snodge | 8/10 | 5478 days | 1% |
| Bo Moenstead | 9/10 | 5487 days | 1% |
| Alain Deslandres | 8/10 | 5491 days | 1% |
| Jakob Jurgen | 10/10 | 5492 days | 1% |
| EA Anders | 8/10 | 5495 days | 1% |
| Helen and Hans Walser | 1/10 | 5498 days | 0% |
| kevinp | 8/10 | 5521 days | 1% |
| warrenp | 9/10 | 5525 days | 1% |
| braunweiler | 9/10 | 5529 days | 1% |
| pimn | 9/10 | 5534 days | 1% |
| asiacritics | 7/10 | 5540 days | 1% |
| Chris Mackamul | 8/10 | 5547 days | 1% |
| Debbie Rathbone | 10/10 | 5547 days | 1% |
| Lisette X | 9/10 | 5548 days | 1% |
| Martin | 10/10 | 5550 days | 1% |
| Thomas Willi | 10/10 | 5550 days | 1% |
| Elodie | 7/10 | 5551 days | 1% |
| richardh | 7/10 | 5665 days | 1% |
| trvlbug | 8/10 | 5693 days | 1% |
| glennandjen | 10/10 | 5754 days | 1% |
| BryonyS | 9/10 | 5772 days | 1% |
| Marion | 9/10 | 5788 days | 1% |
| Mikey | 7/10 | 5789 days | 1% |
| Richard Komzik | 6/10 | 5790 days | 1% |
| Michael Walsall | 10/10 | 5794 days | 1% |
| Anna | 8/10 | 5808 days | 1% |
| Abigail | 7/10 | 5808 days | 1% |
| lannie | 7/10 | 5817 days | 1% |
| SimonR | 8/10 | 5818 days | 1% |
| SonjaG | 7/10 | 5818 days | 1% |
| Chris | 8/10 | 5824 days | 1% |
| AurelieD | 8/10 | 5831 days | 1% |
| Yunker | 10/10 | 5832 days | 1% |
| Andrew | 8/10 | 5834 days | 1% |
| Erin | 9/10 | 5834 days | 1% |
| Christopher Gallaga | 8/10 | 5840 days | 1% |
| Amy | 10/10 | 5846 days | 1% |
| Shona | 8/10 | 5846 days | 1% |
| plumbaum | 9/10 | 5848 days | 1% |
| Sandra | 10/10 | 5856 days | 1% |
| Evangelista | 8/10 | 5856 days | 1% |
| Oliver | 5/10 | 5858 days | 1% |
| Kat | 9/10 | 5888 days | 1% |
| Lisa | 8/10 | 5915 days | 1% |
| siobhan | 8/10 | 5917 days | 1% |
| Alice | 8/10 | 5917 days | 1% |
| NORTZ | 7/10 | 5945 days | 1% |
| Stefan | 8/10 | 5947 days | 1% |
| Hugh Trenchard | 9/10 | 5964 days | 1% |
| Niamh | 4/10 | 5970 days | 1% |
| Jenny | 9/10 | 5994 days | 1% |
| Louise | 8/10 | 6003 days | 1% |
| Peddy | 10/10 | 6013 days | 1% |
| Katie Wise | 8/10 | 6016 days | 1% |
| Thomas Bachmann | 8/10 | 6032 days | 1% |
| Daniala | 8/10 | 6051 days | 1% |
| Tom Ben | 9/10 | 6155 days | 1% |
| Sarah Maudsley | 8/10 | 6170 days | 1% |
| Alan Bellerby | 8/10 | 6170 days | 1% |
| Tina Daly | 5/10 | 6176 days | 1% |
| John Woodrow | 8/10 | 6185 days | 1% |
| Ernst Seter | 9/10 | 6185 days | 1% |
| Jim Curley | 7/10 | 6196 days | 1% |
| Daniel | 7/10 | 6197 days | 1% |
| Marc Hertogs | 7/10 | 6200 days | 1% |
| Laura Sutton | 5/10 | 6224 days | 1% |
| Jeroen | 5/10 | 6226 days | 1% |
| Mum! | 6/10 | 6226 days | 1% |
| Gail | 9/10 | 6230 days | 1% |
| Heike Julia | 6/10 | 6231 days | 1% |
| Lanni | 8/10 | 6231 days | 1% |
| Amanda Finger | 7/10 | 6232 days | 1% |
| Desiree Muri | 7/10 | 6232 days | 1% |
| Jan Grzejik | 8/10 | 6259 days | 1% |
| Wouter Ewalts | 8/10 | 6266 days | 1% |
| Matilde | 6/10 | 6274 days | 1% |
| Kim | 6/10 | 6471 days | 1% |
| Gillian | 8/10 | 6513 days | 1% |
| Denise Nick | 6/10 | 6523 days | 1% |
| ranker_110 | 8/10 | 6542 days | 1% |
| Jasper | 7/10 | 6549 days | 1% |
| Mary | 8/10 | 6549 days | 1% |
| Lucy | 6/10 | 6549 days | 1% |
| Lukas | 8/10 | 6560 days | 1% |
| Hanna | 7/10 | 6562 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
-3.48% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 49 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 168 days. Adjustments are according to the following table.
| Days | Adjustment |
|---|---|
| … | … |
| 165 | -3.42% |
| 166 | -3.44% |
| 167 | -3.46% |
| 168 | -3.48% |
| 169 | -3.50% |
| 170 | -3.52% |
| 171 | -3.54% |
| … | … |
Balancing Adjustment
5.93% 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.