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

83.11%

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 1172 days 100%
Dan Coates 9/10 1405 days 91%
Dominik 9/10 1405 days 91%
Holloway 10/10 1428 days 90%
Christina 6/10 1496 days 72%
Barbara Knops 9/10 1498 days 87%
Manu Liberta 10/10 1508 days 86%
Bruno 9/10 1518 days 86%
Kirsty Smith 10/10 1541 days 85%
Sophia Satter 8/10 1552 days 80%
Afiya Levy 10/10 1773 days 76%
Johannes Eisel 6/10 1782 days 62%
Alexander Mattea 5/10 1782 days 61%
Timea Bagosi 9/10 1784 days 75%
Riviere 8/10 1796 days 71%
Dani 8/10 1798 days 71%
Benoit Leclerc 7/10 1800 days 68%
Anna Stoehr 10/10 1818 days 74%
Kai Krchmar 6/10 1871 days 59%
Kristina Farkas 5/10 2166 days 48%
Sophia Kadel 10/10 2196 days 59%
Laura and Marie 7/10 2202 days 53%
Rachel S 10/10 2209 days 58%
Joris Giullemot 8/10 2518 days 43%
Laura Metz 7/10 2529 days 41%
Hubertus Thost 7/10 2529 days 41%
Amanda 4/10 2544 days 35%
S B 10/10 2557 days 44%
M K 10/10 2557 days 44%
Maya Bakker-deDreu 8/10 2565 days 41%
Christin Woelk 9/10 2845 days 32%
Maria Klister 7/10 2865 days 29%
Lydia Kleinkoenen 9/10 2885 days 31%
Jessica Grewe 9/10 2885 days 31%
Hannah Lia-Isis Kubillus 9/10 2885 days 31%
Jan Zimmerman 8/10 2896 days 29%
Margaret and Derek McNeil 10/10 2956 days 28%
Frank and Suzanne 8/10 2971 days 26%
RollingMoon 8/10 3032 days 23%
Marcel & Kim Meichtry 7/10 3252 days 14%
Howell Davies 5/10 3255 days 13%
Baas 7/10 3255 days 14%
Pete & Pat Etheridge 8/10 3255 days 15%
Siegfried Richter 7/10 3256 days 14%
Melanie Mathiak 10/10 3258 days 16%
Sig Schrattner 8/10 3258 days 15%
Rebecca Doehl 7/10 3259 days 14%
Seth & Carla 7/10 3260 days 14%
Gabriele Wendt 9/10 3260 days 15%
Tadej Ferjan 8/10 3260 days 15%
Mary Mitchell 10/10 3260 days 15%
Emily Wikston 9/10 3261 days 15%
Andreas & Leonie Fehr 10/10 3267 days 15%
Horst Langstein 9/10 3268 days 15%
Marco Scheiber 9/10 3269 days 15%
Friedrich Kaltner 10/10 3271 days 15%
Frank & Julia 10/10 3274 days 15%
Thyg Lingdal 10/10 3274 days 15%
Nicole van Bergen 8/10 3274 days 14%
Mike & April Prince 7/10 3288 days 13%
Alfred & Henrike 8/10 3300 days 13%
Lyn Stainton 6/10 3349 days 10%
Ken Talan 10/10 3577 days 3%
Jon_and_Family 9/10 3581 days 2%
Gertz 10/10 3585 days 2%
Katarina Bokor 8/10 3589 days 2%
Mark Franklin 6/10 3589 days 2%
Gordon Agent 10/10 3589 days 2%
Maureen Hardy 8/10 3589 days 2%
AJ van Pelt 8/10 3589 days 2%
Werner and Rita 9/10 3596 days 2%
Richard Dudfield 10/10 3598 days 2%
Sayaka 7/10 3598 days 2%
Urs and Isabella 7/10 3599 days 2%
Juliane Kleiu 10/10 3602 days 2%
Linda Kremer 9/10 3603 days 2%
Rebecca Johnston 9/10 3603 days 2%
David Mellard 10/10 3604 days 2%
Bruce & Elaine Chote 10/10 3604 days 2%
Paul Nickson 8/10 3604 days 1%
Monique 8/10 3604 days 1%
Beat & Connie 10/10 3606 days 1%
Alex Stil 9/10 3606 days 1%
Pein van Nosrt 7/10 3611 days 1%
Raith 9/10 3611 days 1%
Elise van Haastert 8/10 3611 days 1%
Claudia 10/10 3613 days 1%
Carolin Ranner 6/10 3613 days 1%
Winskowsky 9/10 3614 days 1%
Hvid 9/10 3628 days 1%
Judith K. 6/10 3630 days 0%
Ruben and Jetske 7/10 3630 days 0%
Roy Seymour 9/10 3631 days 0%
Tom Hill 10/10 3635 days 0%
Ruua Reyrink 7/10 3636 days 0%
Patrick Hugener 9/10 3636 days 0%
JohnHaestad 4/10 3640 days 0%
dollimyxture 10/10 3671 days 20%
aggiemary04 10/10 3763 days 20%
victoriauk 4/10 3885 days 16%
Baumgarten 8/10 3913 days 19%
travelbunnyadventures 8/10 3916 days 19%
Don & Geraldine 10/10 3952 days 20%
Matthias & Ceristiane 8/10 3964 days 19%
Hilary and Chris Ayton 9/10 3965 days 20%
Lis & Rob Tate 9/10 3967 days 20%
ccthornton100 10/10 3977 days 20%
Bob Kusesia 10/10 3978 days 20%
Yssel de Schepper 7/10 3983 days 19%
Janny Meerdinnk Veldboow 7/10 3983 days 19%
Arie Ascher 9/10 3984 days 20%
Wolfgang Engelke 10/10 3986 days 20%
Thomas K 9/10 3986 days 20%
Loleit 7/10 3998 days 19%
Mattias Thorm 9/10 3999 days 20%
Vincente Garrido 4/10 4000 days 16%
R Gilge 10/10 4001 days 20%
Erik Hummelmose 8/10 4001 days 19%
Ian E 6/10 4001 days 17%
Nadine Schaee 9/10 4002 days 20%
Belinda Godhard 2/10 4002 days 15%
Uwe Rieper 10/10 4004 days 20%
E.M. Prideaux 10/10 4019 days 20%
Elizabeth E 8/10 4021 days 19%
Stevens Frans 8/10 4022 days 19%
Heinrich Hax 9/10 4025 days 20%
tanh 7/10 4052 days 19%
Stephanie Steiner 8/10 4071 days 19%
Julia May 9/10 4078 days 20%
X Neils 7/10 4089 days 19%
Sarah Smith 5/10 4093 days 16%
Anna 6/10 4097 days 17%
OliverG1 7/10 4299 days 19%
Philipp 5/10 4311 days 16%
JasminA 5/10 4311 days 16%
ChristinaV 8/10 4320 days 19%
JuergenSchnitzer 9/10 4327 days 20%
AstridVG 7/10 4327 days 19%
NatasjaV 7/10 4329 days 19%
JimmyK 7/10 4329 days 19%
MarcoJ 9/10 4331 days 20%
LucyPoland 9/10 4332 days 20%
Stolz 7/10 4334 days 19%
BrzezinskaM 10/10 4336 days 20%
AndreB 10/10 4336 days 20%
Linda 7/10 4342 days 19%
Susan 8/10 4343 days 19%
Byleveld 7/10 4344 days 19%
JoseB 8/10 4345 days 19%
JetteG 10/10 4345 days 20%
CarolF 7/10 4346 days 19%
Rachel 9/10 4360 days 20%
Claire 7/10 4360 days 19%
Denise 8/10 4361 days 19%
Denk 8/10 4373 days 19%
Klalis 10/10 4375 days 20%
Thomas 4/10 4379 days 16%
Mike 5/10 4380 days 16%
Debbie Mossman 9/10 4386 days 20%
Johann 10/10 4387 days 20%
Carina 10/10 4389 days 20%
Mat 8/10 4428 days 19%
Anette 7/10 4430 days 19%
midlands_missus 8/10 4433 days 19%
David 7/10 4488 days 19%
Suyin 10/10 4508 days 20%
Franz 10/10 4682 days 20%
Jennifer Baulch 7/10 4687 days 19%
George Jeffs 10/10 4690 days 20%
Jacob 9/10 4694 days 20%
Aharon 10/10 4709 days 20%
D.A. Mulder 8/10 4710 days 19%
Knol 8/10 4712 days 19%
Cole Penelope 8/10 4715 days 19%
Jody 7/10 4723 days 19%
Anna 5/10 4723 days 16%
Pauline Thai 8/10 4730 days 19%
Dan Adamson 8/10 4730 days 19%
Stephen Brightman 8/10 4739 days 19%
Madeleine Rowland 8/10 4739 days 19%
Bronwyn Gaby 9/10 4757 days 20%
Free_ride 9/10 4773 days 20%
Michael 9/10 4796 days 20%
Raul 10/10 5046 days 20%
TeamFlorida 9/10 5048 days 20%
TeamFlorida 8/10 5048 days 19%
James 9/10 5061 days 20%
Rudi 10/10 5065 days 20%
Rolf Kruger 10/10 5089 days 20%
Brian 10/10 5093 days 20%

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

-4.10% Adjustment

There may be an adjustment if this experience hasn't received any reviews within the last 46 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 -4.04%
198 -4.06%
199 -4.08%
200 -4.10%
201 -4.12%
202 -4.14%
203 -4.16%

Final Ranking Score

79%

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.