Ranking Score Explained

Hi there, 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 Te Anau 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.

Nick Morrison's avatar

Nick Morrison

Rankers owner

Te Anau Glowworm Caves

Valid Reviews

190 Valid Reviews

The Te Anau Glowworm Caves experience has a total of 191 reviews. There are 190 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 190 valid reviews:

Rating Count Percentage
10/10 49
26%
9/10 43
23%
8/10 41
22%
7/10 34
18%
6/10 9
5%
5/10 8
4%
4/10 5
3%
3/10 0
0%
2/10 1
1%
1/10 0
0%

82.05% Average

The raw data average (mean) for all the Te Anau Glowworm Caves valid reviews is 82.05% and is based on 190 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

176 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 190 valid reviews, the experience has 176 face-to-face reviews collected during interviews by our team.

Below is the distribution of ratings for the 176 face-to-face reviews:

Rating Count Percentage
10/10 45
26%
9/10 39
22%
8/10 38
22%
7/10 34
19%
6/10 8
5%
5/10 8
5%
4/10 3
2%
3/10 0
0%
2/10 1
1%
1/10 0
0%

82.10% Average

The raw data average (mean) for all the Te Anau Glowworm Caves face-to-face reviews is 82.10% and is based on 176 face-to-face reviews. This value is not used to calculate the ranking score and it only provided here for comparison purposes.

Weighted Average

83.37%

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
Dorothy and Graham Glen 9/10 1450 days 100%
Dan Coates 9/10 1683 days 89%
Dominik 9/10 1683 days 89%
Holloway 10/10 1706 days 88%
Christina 6/10 1774 days 71%
Barbara Knops 9/10 1776 days 85%
Manu Liberta 10/10 1786 days 85%
Bruno 9/10 1796 days 84%
Kirsty Smith 10/10 1819 days 83%
Sophia Satter 8/10 1830 days 78%
Afiya Levy 10/10 2051 days 72%
Johannes Eisel 6/10 2060 days 60%
Alexander Mattea 5/10 2060 days 58%
Timea Bagosi 9/10 2062 days 72%
Riviere 8/10 2074 days 68%
Dani 8/10 2076 days 68%
Benoit Leclerc 7/10 2078 days 65%
Anna Stoehr 10/10 2096 days 70%
Kai Krchmar 6/10 2149 days 56%
Kristina Farkas 5/10 2444 days 44%
Sophia Kadel 10/10 2474 days 53%
Laura and Marie 7/10 2480 days 48%
Rachel S 10/10 2487 days 52%
Joris Giullemot 8/10 2796 days 36%
Laura Metz 7/10 2807 days 34%
Hubertus Thost 7/10 2807 days 34%
Amanda 4/10 2822 days 29%
S B 10/10 2835 days 36%
M K 10/10 2835 days 36%
Maya Bakker-deDreu 8/10 2843 days 34%
Christin Woelk 9/10 3123 days 23%
Maria Klister 7/10 3143 days 20%
Lydia Kleinkoenen 9/10 3163 days 21%
Jessica Grewe 9/10 3163 days 21%
Hannah Lia-Isis Kubillus 9/10 3163 days 21%
Jan Zimmerman 8/10 3174 days 20%
Margaret and Derek McNeil 10/10 3234 days 18%
Frank and Suzanne 8/10 3249 days 17%
RollingMoon 8/10 3310 days 14%
Marcel & Kim Meichtry 7/10 3530 days 4%
Howell Davies 5/10 3533 days 3%
Baas 7/10 3533 days 4%
Pete & Pat Etheridge 8/10 3533 days 4%
Siegfried Richter 7/10 3534 days 4%
Melanie Mathiak 10/10 3536 days 4%
Sig Schrattner 8/10 3536 days 4%
Rebecca Doehl 7/10 3537 days 4%
Seth & Carla 7/10 3538 days 4%
Gabriele Wendt 9/10 3538 days 4%
Tadej Ferjan 8/10 3538 days 4%
Mary Mitchell 10/10 3538 days 4%
Emily Wikston 9/10 3539 days 4%
Andreas & Leonie Fehr 10/10 3545 days 4%
Horst Langstein 9/10 3546 days 4%
Marco Scheiber 9/10 3547 days 4%
Friedrich Kaltner 10/10 3549 days 4%
Frank & Julia 10/10 3552 days 4%
Thyg Lingdal 10/10 3552 days 4%
Nicole van Bergen 8/10 3552 days 3%
Mike & April Prince 7/10 3566 days 3%
Alfred & Henrike 8/10 3578 days 2%
Lyn Stainton 6/10 3627 days 0%
Ken Talan 10/10 3855 days 23%
Jon_and_Family 9/10 3859 days 23%
Gertz 10/10 3863 days 23%
Katarina Bokor 8/10 3867 days 21%
Mark Franklin 6/10 3867 days 19%
Gordon Agent 10/10 3867 days 23%
Maureen Hardy 8/10 3867 days 21%
AJ van Pelt 8/10 3867 days 21%
Werner and Rita 9/10 3874 days 23%
Richard Dudfield 10/10 3876 days 23%
Sayaka 7/10 3876 days 20%
Urs and Isabella 7/10 3877 days 20%
Juliane Kleiu 10/10 3880 days 23%
Linda Kremer 9/10 3881 days 23%
Rebecca Johnston 9/10 3881 days 23%
David Mellard 10/10 3882 days 23%
Bruce & Elaine Chote 10/10 3882 days 23%
Paul Nickson 8/10 3882 days 21%
Monique 8/10 3882 days 21%
Beat & Connie 10/10 3884 days 23%
Alex Stil 9/10 3884 days 23%
Pein van Nosrt 7/10 3889 days 20%
Raith 9/10 3889 days 23%
Elise van Haastert 8/10 3889 days 21%
Claudia 10/10 3891 days 23%
Carolin Ranner 6/10 3891 days 19%
Winskowsky 9/10 3892 days 23%
Hvid 9/10 3906 days 23%
Judith K. 6/10 3908 days 19%
Ruben and Jetske 7/10 3908 days 20%
Roy Seymour 9/10 3909 days 23%
Tom Hill 10/10 3913 days 23%
Ruua Reyrink 7/10 3914 days 20%
Patrick Hugener 9/10 3914 days 23%
JohnHaestad 4/10 3918 days 18%
dollimyxture 10/10 3949 days 23%
aggiemary04 10/10 4041 days 23%
victoriauk 4/10 4163 days 18%
Baumgarten 8/10 4191 days 21%
travelbunnyadventures 8/10 4194 days 21%
Don & Geraldine 10/10 4230 days 23%
Matthias & Ceristiane 8/10 4242 days 21%
Hilary and Chris Ayton 9/10 4243 days 23%
Lis & Rob Tate 9/10 4245 days 23%
ccthornton100 10/10 4255 days 23%
Bob Kusesia 10/10 4256 days 23%
Yssel de Schepper 7/10 4261 days 20%
Janny Meerdinnk Veldboow 7/10 4261 days 20%
Arie Ascher 9/10 4262 days 23%
Wolfgang Engelke 10/10 4264 days 23%
Thomas K 9/10 4264 days 23%
Loleit 7/10 4276 days 20%
Mattias Thorm 9/10 4277 days 23%
Vincente Garrido 4/10 4278 days 18%
R Gilge 10/10 4279 days 23%
Erik Hummelmose 8/10 4279 days 21%
Ian E 6/10 4279 days 19%
Nadine Schaee 9/10 4280 days 23%
Belinda Godhard 2/10 4280 days 17%
Uwe Rieper 10/10 4282 days 23%
E.M. Prideaux 10/10 4297 days 23%
Elizabeth E 8/10 4299 days 21%
Stevens Frans 8/10 4300 days 21%
Heinrich Hax 9/10 4303 days 23%
tanh 7/10 4330 days 20%
Stephanie Steiner 8/10 4349 days 21%
Julia May 9/10 4356 days 23%
X Neils 7/10 4367 days 20%
Sarah Smith 5/10 4371 days 18%
Anna 6/10 4375 days 19%
OliverG1 7/10 4577 days 20%
Philipp 5/10 4589 days 18%
JasminA 5/10 4589 days 18%
ChristinaV 8/10 4598 days 21%
JuergenSchnitzer 9/10 4605 days 23%
AstridVG 7/10 4605 days 20%
NatasjaV 7/10 4607 days 20%
JimmyK 7/10 4607 days 20%
MarcoJ 9/10 4609 days 23%
LucyPoland 9/10 4610 days 23%
Stolz 7/10 4612 days 20%
BrzezinskaM 10/10 4614 days 23%
AndreB 10/10 4614 days 23%
Linda 7/10 4620 days 20%
Susan 8/10 4621 days 21%
Byleveld 7/10 4622 days 20%
JoseB 8/10 4623 days 21%
JetteG 10/10 4623 days 23%
CarolF 7/10 4624 days 20%
Rachel 9/10 4638 days 23%
Claire 7/10 4638 days 20%
Denise 8/10 4639 days 21%
Denk 8/10 4651 days 21%
Klalis 10/10 4653 days 23%
Thomas 4/10 4657 days 18%
Mike 5/10 4658 days 18%
Debbie Mossman 9/10 4664 days 23%
Johann 10/10 4665 days 23%
Carina 10/10 4667 days 23%
Mat 8/10 4706 days 21%
Anette 7/10 4708 days 20%
midlands_missus 8/10 4711 days 21%
David 7/10 4766 days 20%
Suyin 10/10 4786 days 23%
Franz 10/10 4960 days 23%
Jennifer Baulch 7/10 4965 days 20%
George Jeffs 10/10 4968 days 23%
Jacob 9/10 4972 days 23%
Aharon 10/10 4987 days 23%
D.A. Mulder 8/10 4988 days 21%
Knol 8/10 4990 days 21%
Cole Penelope 8/10 4993 days 21%
Jody 7/10 5001 days 20%
Anna 5/10 5001 days 18%
Pauline Thai 8/10 5008 days 21%
Dan Adamson 8/10 5008 days 21%
Stephen Brightman 8/10 5017 days 21%
Madeleine Rowland 8/10 5017 days 21%
Bronwyn Gaby 9/10 5035 days 23%
Free_ride 9/10 5051 days 23%
Michael 9/10 5074 days 23%
Raul 10/10 5324 days 23%
TeamFlorida 9/10 5326 days 23%
TeamFlorida 8/10 5326 days 21%
James 9/10 5339 days 23%
Rudi 10/10 5343 days 23%
Rolf Kruger 10/10 5367 days 23%
Brian 10/10 5371 days 23%

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 Te Anau Glowworm Caves experience has plenty of reviews and does not meet the criteria for any adjustment.

Recent Reviews Adjustment

-3.73% Adjustment

There may be an adjustment if this experience hasn't received any reviews within the last 54 days. However the Te Anau 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 Te Anau Glowworm Caves experience has been adjusted for 200 days. Adjustments are according to the following table.

Days Adjustment
197 -3.67%
198 -3.69%
199 -3.71%
200 -3.73%
201 -3.75%
202 -3.77%
203 -3.78%

Final Ranking Score

80%

The final ranking score once adjustments and rounding has been applied. This value is cached and recalculated each day. Therefore it may not be precisely accurate based on the other values presented.

If you have any questions or comments about our ranking score calculation please get in touch at info@rankers.co.nz.