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
75.46%
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 | 112 days | 100% |
| Anne | 7/10 | 447 days | 89% |
| ros fraser | 4/10 | 2457 days | 3% |
| wynden | 1/10 | 2485 days | 2% |
| Rado Hank | 10/10 | 2572 days | 4% |
| Lizzie Edmonds | 8/10 | 2573 days | 4% |
| Anis Quentin | 7/10 | 2580 days | 4% |
| Jeny Smolders | 7/10 | 2584 days | 4% |
| Oscar Petersen | 8/10 | 2591 days | 4% |
| Ani | 9/10 | 2700 days | 4% |
| Martin Murlik | 8/10 | 2812 days | 3% |
| Laura | 9/10 | 2823 days | 3% |
| Melanie Farrell | 7/10 | 2831 days | 3% |
| Andy | 10/10 | 2838 days | 3% |
| Julia Achatz | 5/10 | 2852 days | 2% |
| Auba Mateos | 7/10 | 2858 days | 3% |
| Charlotte | 7/10 | 2858 days | 3% |
| Isabel Zedelius | 8/10 | 2861 days | 3% |
| Dries | 8/10 | 2901 days | 3% |
| Clarissa Glaser | 8/10 | 2902 days | 3% |
| Alna | 10/10 | 2907 days | 3% |
| Holger Worner | 9/10 | 2907 days | 3% |
| Karlee Hormell | 9/10 | 2916 days | 3% |
| Alonso | 9/10 | 2920 days | 3% |
| Rose Guillaume | 8/10 | 2923 days | 3% |
| Caroline Coudray | 8/10 | 2927 days | 3% |
| Barbara | 8/10 | 2927 days | 3% |
| Leonie Brabers | 7/10 | 2935 days | 3% |
| Bina Johansson | 10/10 | 2935 days | 3% |
| Sam Staines | 9/10 | 2939 days | 3% |
| Erik | 6/10 | 2942 days | 3% |
| Nicole Signer | 8/10 | 2949 days | 3% |
| Sam Taylor | 7/10 | 2953 days | 3% |
| Vanuxem | 8/10 | 3157 days | 3% |
| Clara Bertomeu | 10/10 | 3157 days | 3% |
| Lukas Boller | 9/10 | 3159 days | 3% |
| Mette Elholm | 7/10 | 3173 days | 2% |
| Mathilde Arp | 8/10 | 3173 days | 2% |
| Chloe and Guillame | 9/10 | 3177 days | 3% |
| Andre | 9/10 | 3179 days | 3% |
| Doerte | 10/10 | 3179 days | 3% |
| Saskia Peek | 9/10 | 3180 days | 3% |
| Erika Tarant | 8/10 | 3180 days | 2% |
| Jennifer Nguyen | 7/10 | 3181 days | 2% |
| Julie Duvert | 7/10 | 3181 days | 2% |
| Dan Ramsl | 4/10 | 3181 days | 2% |
| Lucy Mulvin | 7/10 | 3182 days | 2% |
| Fine Kochling | 9/10 | 3184 days | 3% |
| Eberhard | 9/10 | 3184 days | 3% |
| Hannes | 8/10 | 3185 days | 2% |
| Calum Penn | 9/10 | 3187 days | 2% |
| Arthur Portolleau | 6/10 | 3188 days | 2% |
| Elisabet | 10/10 | 3189 days | 3% |
| Tommy Mannien | 8/10 | 3190 days | 2% |
| Solange Bourbeois | 8/10 | 3193 days | 2% |
| Talissa Missiato | 10/10 | 3193 days | 3% |
| Severin Knegsch | 9/10 | 3194 days | 2% |
| Pierre Jouffineau | 10/10 | 3195 days | 3% |
| Lewis Whittle | 8/10 | 3197 days | 2% |
| Ben and Pauline | 8/10 | 3199 days | 2% |
| Ann-Kathrin | 7/10 | 3204 days | 2% |
| Natasha Harbinson | 10/10 | 3205 days | 2% |
| Sebastian | 2/10 | 3206 days | 1% |
| Jaquein Bucholz | 3/10 | 3206 days | 1% |
| Chiara | 7/10 | 3206 days | 2% |
| Cariotta Kemper | 3/10 | 3206 days | 1% |
| Megan Lenox | 7/10 | 3209 days | 2% |
| Max Mustermann | 8/10 | 3211 days | 2% |
| Amy Stafford | 8/10 | 3214 days | 2% |
| Carl | 7/10 | 3214 days | 2% |
| Briony | 7/10 | 3216 days | 2% |
| Melanie Kronbichler | 8/10 | 3217 days | 2% |
| Andreas Schiefer | 7/10 | 3218 days | 2% |
| Veronique Kaplan | 3/10 | 3220 days | 1% |
| Robin Ings | 6/10 | 3221 days | 2% |
| Stula Vladimir | 7/10 | 3222 days | 2% |
| David Soukal | 8/10 | 3222 days | 2% |
| Olivia Aliprandi | 7/10 | 3223 days | 2% |
| Isabelle | 2/10 | 3225 days | 1% |
| Jonathan Gourmel | 8/10 | 3225 days | 2% |
| Mikkel Palleson | 4/10 | 3228 days | 2% |
| Franziska and Sabine | 7/10 | 3229 days | 2% |
| Chloe Guerillot | 7/10 | 3229 days | 2% |
| Faye Oliver | 7/10 | 3231 days | 2% |
| Iris Kerbler | 9/10 | 3231 days | 2% |
| Til Schaebitz | 6/10 | 3232 days | 2% |
| Elisabeth Grabner | 9/10 | 3234 days | 2% |
| Berith | 10/10 | 3234 days | 2% |
| Chris Simpson | 6/10 | 3237 days | 2% |
| Pekka and Jonna | 9/10 | 3237 days | 2% |
| Jonas Hoerning | 8/10 | 3238 days | 2% |
| Nils | 10/10 | 3238 days | 2% |
| Mark Rosema | 8/10 | 3239 days | 2% |
| Lisa Huber | 10/10 | 3239 days | 2% |
| Nicola Wiggan | 9/10 | 3260 days | 2% |
| Linda and Gunther | 4/10 | 3261 days | 2% |
| Julie | 9/10 | 3262 days | 2% |
| Maria Schaer | 7/10 | 3266 days | 2% |
| Mette and Jesper | 5/10 | 3268 days | 2% |
| Pierre and Alexandra | 6/10 | 3274 days | 2% |
| Julia Waenninger | 8/10 | 3286 days | 2% |
| Sarah Boettcher | 9/10 | 3322 days | 2% |
| Suzanne Vermeulen | 6/10 | 3339 days | 2% |
| Blandine Giusti | 7/10 | 3542 days | 2% |
| Bart Hanssen | 6/10 | 3621 days | 1% |
| Astrid Egesten | 7/10 | 3673 days | 1% |
| Jean Curry | 9/10 | 3896 days | 1% |
| Carla Oyarzun | 1/10 | 3900 days | 0% |
| Philippe Chiasson | 9/10 | 3906 days | 1% |
| Helma Druyken | 4/10 | 3916 days | 1% |
| Florian Guttler | 7/10 | 3919 days | 1% |
| Casandra Prunica | 8/10 | 3920 days | 1% |
| Lauren Hedley | 7/10 | 3920 days | 1% |
| Janina Zwerver | 8/10 | 3920 days | 1% |
| Marieke Feyteres | 4/10 | 3924 days | 1% |
| van Linda Werner | 5/10 | 3924 days | 1% |
| Philip Donachie | 7/10 | 3934 days | 1% |
| Luisa Bach | 8/10 | 3934 days | 1% |
| Kristina | 7/10 | 3936 days | 1% |
| Eugen Lehner | 6/10 | 3937 days | 1% |
| Manuel Bach | 7/10 | 3937 days | 1% |
| Matthias Freiling | 2/10 | 3944 days | 0% |
| Debora Grusler | 6/10 | 3947 days | 1% |
| Andreas Brodhaeker | 8/10 | 3960 days | 1% |
| Renee van der Syde | 7/10 | 3961 days | 1% |
| Martha Horst | 8/10 | 3961 days | 1% |
| Roland Beer | 7/10 | 3965 days | 1% |
| Johanna Bak | 4/10 | 3965 days | 1% |
| Lior Bakski | 9/10 | 3975 days | 1% |
| Bet | 9/10 | 3976 days | 1% |
| Memain | 8/10 | 4249 days | 0% |
| Konza | 7/10 | 4250 days | 0% |
| Steen Rausmussen | 8/10 | 4281 days | 0% |
| David Restell | 10/10 | 4311 days | 0% |
| Christina Rodewald | 9/10 | 4316 days | 0% |
| Hanneke P | 7/10 | 4342 days | 0% |
| Kohler | 9/10 | 4362 days | 0% |
| Alexandra van den Brack | 6/10 | 4370 days | 0% |
| Paul Lawrence | 9/10 | 4371 days | 0% |
| Abby Rushmer | 7/10 | 4372 days | 0% |
| Stephan Olivier | 7/10 | 4377 days | 0% |
| Stephan Olivier | 7/10 | 4377 days | 0% |
| Faassen | 8/10 | 4381 days | 1% |
| Julie Lamart | 8/10 | 4382 days | 1% |
| Adrian Weidell | 5/10 | 4578 days | 1% |
| Jonathan Tuthill | 9/10 | 4633 days | 1% |
| A Ormsby | 10/10 | 4645 days | 1% |
| Gillian Rowe | 10/10 | 4658 days | 1% |
| Ryan Pynappels | 8/10 | 4659 days | 1% |
| Peter Dellen | 8/10 | 4660 days | 1% |
| Jorg Steffens | 8/10 | 4660 days | 1% |
| Danielle & Jobbe | 9/10 | 4662 days | 1% |
| Christina | 6/10 | 4663 days | 1% |
| Jop Veldhuis | 7/10 | 4663 days | 1% |
| Paul Weidenfeld | 8/10 | 4664 days | 1% |
| Sophie Dorrepaal | 7/10 | 4664 days | 1% |
| Fannette Peyreplane | 5/10 | 4665 days | 1% |
| Norm Cooper | 7/10 | 4669 days | 1% |
| Gloria, Rose & An | 8/10 | 4669 days | 1% |
| A Sorg | 10/10 | 4669 days | 1% |
| Samplonius | 5/10 | 4672 days | 1% |
| Petra | 10/10 | 4672 days | 1% |
| Bethany Hamilton | 8/10 | 4676 days | 1% |
| suffolkhouse69 | 9/10 | 4677 days | 1% |
| a a | 8/10 | 4708 days | 1% |
| Julia Balionis | 7/10 | 4722 days | 1% |
| Julia Hartman | 3/10 | 4723 days | 1% |
| Fabienne Indergand | 7/10 | 4743 days | 1% |
| Waldemar Schuler | 9/10 | 4755 days | 1% |
| pepette31 | 7/10 | 4830 days | 1% |
| Craig Hathaway | 9/10 | 4982 days | 1% |
| Stephane Lebel | 9/10 | 4987 days | 1% |
| Rens Hemselmans | 7/10 | 5000 days | 1% |
| Isabell | 10/10 | 5002 days | 1% |
| Holly Cave | 5/10 | 5002 days | 1% |
| J Palmer | 6/10 | 5006 days | 1% |
| Liz & Jim | 10/10 | 5008 days | 1% |
| Edgar & Marilyn Berry | 9/10 | 5010 days | 1% |
| Simon Vickers | 2/10 | 5013 days | 0% |
| Leslie | 8/10 | 5026 days | 1% |
| Jean-Francois Guilbault | 8/10 | 5027 days | 1% |
| Selina Mueller | 7/10 | 5028 days | 1% |
| Tamlin Barton | 3/10 | 5029 days | 1% |
| Cara Dungay | 8/10 | 5030 days | 1% |
| Bottcher | 10/10 | 5030 days | 1% |
| Alexandra | 10/10 | 5031 days | 1% |
| Philipp Rau | 7/10 | 5033 days | 1% |
| Dan Aldridge | 9/10 | 5035 days | 1% |
| John Allen | 8/10 | 5037 days | 1% |
| Curtis Penner | 8/10 | 5037 days | 1% |
| Brandt | 8/10 | 5039 days | 1% |
| Nadia Husain | 5/10 | 5042 days | 1% |
| T J Andrews | 6/10 | 5058 days | 1% |
| Charli Skinner | 7/10 | 5309 days | 1% |
| Carl_Larsen | 10/10 | 5318 days | 1% |
| Susan & Richard | 10/10 | 5379 days | 1% |
| Rik | 9/10 | 5380 days | 1% |
| Jonathan Martin | 7/10 | 5382 days | 1% |
| Gunda G | 9/10 | 5387 days | 1% |
| Aaron | 8/10 | 5389 days | 1% |
| Will Jemma | 6/10 | 5392 days | 1% |
| Christen Hans | 10/10 | 5393 days | 1% |
| Monica and Danie. | 7/10 | 5401 days | 1% |
| Stephen | 5/10 | 5403 days | 1% |
| Susan | 10/10 | 5403 days | 1% |
| snodge | 8/10 | 5407 days | 1% |
| Bo Moenstead | 9/10 | 5416 days | 1% |
| Alain Deslandres | 8/10 | 5420 days | 1% |
| Jakob Jurgen | 10/10 | 5421 days | 1% |
| EA Anders | 8/10 | 5424 days | 1% |
| Helen and Hans Walser | 1/10 | 5427 days | 0% |
| kevinp | 8/10 | 5450 days | 1% |
| warrenp | 9/10 | 5454 days | 1% |
| braunweiler | 9/10 | 5458 days | 1% |
| pimn | 9/10 | 5463 days | 1% |
| asiacritics | 7/10 | 5469 days | 1% |
| Chris Mackamul | 8/10 | 5476 days | 1% |
| Debbie Rathbone | 10/10 | 5476 days | 1% |
| Lisette X | 9/10 | 5477 days | 1% |
| Martin | 10/10 | 5479 days | 1% |
| Thomas Willi | 10/10 | 5479 days | 1% |
| Elodie | 7/10 | 5480 days | 1% |
| richardh | 7/10 | 5594 days | 1% |
| trvlbug | 8/10 | 5622 days | 1% |
| glennandjen | 10/10 | 5683 days | 1% |
| BryonyS | 9/10 | 5701 days | 1% |
| Marion | 9/10 | 5718 days | 1% |
| Mikey | 7/10 | 5718 days | 1% |
| Richard Komzik | 6/10 | 5719 days | 1% |
| Michael Walsall | 10/10 | 5723 days | 1% |
| Anna | 8/10 | 5737 days | 1% |
| Abigail | 7/10 | 5738 days | 1% |
| lannie | 7/10 | 5747 days | 1% |
| SimonR | 8/10 | 5747 days | 1% |
| SonjaG | 7/10 | 5747 days | 1% |
| Chris | 8/10 | 5754 days | 1% |
| AurelieD | 8/10 | 5760 days | 1% |
| Yunker | 10/10 | 5762 days | 1% |
| Andrew | 8/10 | 5764 days | 1% |
| Erin | 9/10 | 5764 days | 1% |
| Christopher Gallaga | 8/10 | 5770 days | 1% |
| Amy | 10/10 | 5776 days | 1% |
| Shona | 8/10 | 5776 days | 1% |
| plumbaum | 9/10 | 5778 days | 1% |
| Sandra | 10/10 | 5786 days | 1% |
| Evangelista | 8/10 | 5786 days | 1% |
| Oliver | 5/10 | 5788 days | 1% |
| Kat | 9/10 | 5818 days | 1% |
| Lisa | 8/10 | 5845 days | 1% |
| siobhan | 8/10 | 5847 days | 1% |
| Alice | 8/10 | 5847 days | 1% |
| NORTZ | 7/10 | 5875 days | 1% |
| Stefan | 8/10 | 5877 days | 1% |
| Hugh Trenchard | 9/10 | 5893 days | 1% |
| Niamh | 4/10 | 5900 days | 1% |
| Jenny | 9/10 | 5924 days | 1% |
| Louise | 8/10 | 5933 days | 1% |
| Peddy | 10/10 | 5943 days | 1% |
| Katie Wise | 8/10 | 5946 days | 1% |
| Thomas Bachmann | 8/10 | 5962 days | 1% |
| Daniala | 8/10 | 5981 days | 1% |
| Tom Ben | 9/10 | 6084 days | 1% |
| Sarah Maudsley | 8/10 | 6099 days | 1% |
| Alan Bellerby | 8/10 | 6099 days | 1% |
| Tina Daly | 5/10 | 6105 days | 1% |
| John Woodrow | 8/10 | 6114 days | 1% |
| Ernst Seter | 9/10 | 6114 days | 1% |
| Jim Curley | 7/10 | 6125 days | 1% |
| Daniel | 7/10 | 6126 days | 1% |
| Marc Hertogs | 7/10 | 6129 days | 1% |
| Laura Sutton | 5/10 | 6153 days | 1% |
| Jeroen | 5/10 | 6155 days | 1% |
| Mum! | 6/10 | 6155 days | 1% |
| Gail | 9/10 | 6159 days | 1% |
| Heike Julia | 6/10 | 6160 days | 1% |
| Lanni | 8/10 | 6160 days | 1% |
| Amanda Finger | 7/10 | 6161 days | 1% |
| Desiree Muri | 7/10 | 6161 days | 1% |
| Jan Grzejik | 8/10 | 6188 days | 1% |
| Wouter Ewalts | 8/10 | 6195 days | 1% |
| Matilde | 6/10 | 6203 days | 1% |
| Kim | 6/10 | 6400 days | 1% |
| Gillian | 8/10 | 6442 days | 1% |
| Denise Nick | 6/10 | 6452 days | 1% |
| ranker_110 | 8/10 | 6471 days | 1% |
| Jasper | 7/10 | 6478 days | 1% |
| Mary | 8/10 | 6478 days | 1% |
| Lucy | 6/10 | 6478 days | 1% |
| Lukas | 8/10 | 6489 days | 1% |
| Hanna | 7/10 | 6491 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
-1.96% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 43 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 97 days. Adjustments are according to the following table.
| Days | Adjustment |
|---|---|
| … | … |
| 94 | -1.90% |
| 95 | -1.92% |
| 96 | -1.94% |
| 97 | -1.96% |
| 98 | -1.98% |
| 99 | -2.00% |
| 100 | -2.02% |
| … | … |
Balancing Adjustment
5.27% 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.