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

83.35%

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 1282 days 100%
Dan Coates 9/10 1515 days 89%
Dominik 9/10 1515 days 89%
Holloway 10/10 1538 days 88%
Christina 6/10 1606 days 70%
Barbara Knops 9/10 1608 days 85%
Manu Liberta 10/10 1618 days 85%
Bruno 9/10 1628 days 84%
Kirsty Smith 10/10 1651 days 83%
Sophia Satter 8/10 1662 days 78%
Afiya Levy 10/10 1883 days 73%
Johannes Eisel 6/10 1892 days 59%
Alexander Mattea 5/10 1892 days 57%
Timea Bagosi 9/10 1895 days 72%
Riviere 8/10 1906 days 68%
Dani 8/10 1908 days 68%
Benoit Leclerc 7/10 1910 days 64%
Anna Stoehr 10/10 1928 days 71%
Kai Krchmar 6/10 1981 days 56%
Kristina Farkas 5/10 2276 days 43%
Sophia Kadel 10/10 2306 days 54%
Laura and Marie 7/10 2312 days 48%
Rachel S 10/10 2320 days 53%
Joris Giullemot 8/10 2628 days 37%
Laura Metz 7/10 2639 days 34%
Hubertus Thost 7/10 2639 days 34%
Amanda 4/10 2654 days 28%
S B 10/10 2667 days 37%
M K 10/10 2667 days 37%
Maya Bakker-deDreu 8/10 2675 days 35%
Christin Woelk 9/10 2955 days 24%
Maria Klister 7/10 2975 days 21%
Lydia Kleinkoenen 9/10 2995 days 22%
Jessica Grewe 9/10 2995 days 22%
Hannah Lia-Isis Kubillus 9/10 2995 days 22%
Jan Zimmerman 8/10 3006 days 21%
Margaret and Derek McNeil 10/10 3066 days 19%
Frank and Suzanne 8/10 3081 days 17%
RollingMoon 8/10 3142 days 15%
Marcel & Kim Meichtry 7/10 3362 days 5%
Howell Davies 5/10 3365 days 3%
Baas 7/10 3365 days 5%
Pete & Pat Etheridge 8/10 3365 days 5%
Siegfried Richter 7/10 3366 days 5%
Melanie Mathiak 10/10 3368 days 6%
Sig Schrattner 8/10 3368 days 5%
Rebecca Doehl 7/10 3369 days 4%
Seth & Carla 7/10 3370 days 4%
Gabriele Wendt 9/10 3370 days 5%
Tadej Ferjan 8/10 3370 days 5%
Mary Mitchell 10/10 3370 days 5%
Emily Wikston 9/10 3371 days 5%
Andreas & Leonie Fehr 10/10 3377 days 5%
Horst Langstein 9/10 3378 days 5%
Marco Scheiber 9/10 3379 days 5%
Friedrich Kaltner 10/10 3381 days 5%
Frank & Julia 10/10 3384 days 5%
Thyg Lingdal 10/10 3384 days 5%
Nicole van Bergen 8/10 3384 days 4%
Mike & April Prince 7/10 3398 days 3%
Alfred & Henrike 8/10 3410 days 3%
Lyn Stainton 6/10 3459 days 0%
Ken Talan 10/10 3687 days 16%
Jon_and_Family 9/10 3691 days 16%
Gertz 10/10 3695 days 16%
Katarina Bokor 8/10 3699 days 15%
Mark Franklin 6/10 3699 days 12%
Gordon Agent 10/10 3699 days 16%
Maureen Hardy 8/10 3699 days 15%
AJ van Pelt 8/10 3699 days 15%
Werner and Rita 9/10 3706 days 16%
Richard Dudfield 10/10 3708 days 16%
Sayaka 7/10 3708 days 14%
Urs and Isabella 7/10 3709 days 14%
Juliane Kleiu 10/10 3712 days 16%
Linda Kremer 9/10 3713 days 16%
Rebecca Johnston 9/10 3713 days 16%
David Mellard 10/10 3714 days 16%
Bruce & Elaine Chote 10/10 3714 days 16%
Paul Nickson 8/10 3714 days 15%
Monique 8/10 3714 days 15%
Beat & Connie 10/10 3716 days 16%
Alex Stil 9/10 3716 days 16%
Pein van Nosrt 7/10 3721 days 14%
Raith 9/10 3721 days 16%
Elise van Haastert 8/10 3721 days 15%
Claudia 10/10 3723 days 16%
Carolin Ranner 6/10 3723 days 12%
Winskowsky 9/10 3724 days 16%
Hvid 9/10 3738 days 16%
Judith K. 6/10 3740 days 12%
Ruben and Jetske 7/10 3740 days 14%
Roy Seymour 9/10 3741 days 16%
Tom Hill 10/10 3745 days 16%
Ruua Reyrink 7/10 3746 days 14%
Patrick Hugener 9/10 3746 days 16%
JohnHaestad 4/10 3750 days 11%
dollimyxture 10/10 3781 days 16%
aggiemary04 10/10 3873 days 16%
victoriauk 4/10 3995 days 11%
Baumgarten 8/10 4023 days 15%
travelbunnyadventures 8/10 4026 days 15%
Don & Geraldine 10/10 4062 days 16%
Matthias & Ceristiane 8/10 4074 days 15%
Hilary and Chris Ayton 9/10 4075 days 16%
Lis & Rob Tate 9/10 4077 days 16%
ccthornton100 10/10 4087 days 16%
Bob Kusesia 10/10 4088 days 16%
Yssel de Schepper 7/10 4093 days 14%
Janny Meerdinnk Veldboow 7/10 4093 days 14%
Arie Ascher 9/10 4094 days 16%
Wolfgang Engelke 10/10 4096 days 16%
Thomas K 9/10 4096 days 16%
Loleit 7/10 4108 days 14%
Mattias Thorm 9/10 4109 days 16%
Vincente Garrido 4/10 4110 days 11%
R Gilge 10/10 4111 days 16%
Erik Hummelmose 8/10 4111 days 15%
Ian E 6/10 4111 days 12%
Nadine Schaee 9/10 4112 days 16%
Belinda Godhard 2/10 4112 days 10%
Uwe Rieper 10/10 4114 days 16%
E.M. Prideaux 10/10 4129 days 16%
Elizabeth E 8/10 4131 days 15%
Stevens Frans 8/10 4132 days 15%
Heinrich Hax 9/10 4135 days 16%
tanh 7/10 4162 days 14%
Stephanie Steiner 8/10 4181 days 15%
Julia May 9/10 4188 days 16%
X Neils 7/10 4199 days 14%
Sarah Smith 5/10 4203 days 12%
Anna 6/10 4207 days 12%
OliverG1 7/10 4409 days 14%
Philipp 5/10 4421 days 12%
JasminA 5/10 4421 days 12%
ChristinaV 8/10 4431 days 15%
JuergenSchnitzer 9/10 4437 days 16%
AstridVG 7/10 4438 days 14%
NatasjaV 7/10 4439 days 14%
JimmyK 7/10 4439 days 14%
MarcoJ 9/10 4441 days 16%
LucyPoland 9/10 4442 days 16%
Stolz 7/10 4445 days 14%
BrzezinskaM 10/10 4446 days 16%
AndreB 10/10 4446 days 16%
Linda 7/10 4453 days 14%
Susan 8/10 4454 days 15%
Byleveld 7/10 4454 days 14%
JoseB 8/10 4455 days 15%
JetteG 10/10 4455 days 16%
CarolF 7/10 4456 days 14%
Rachel 9/10 4471 days 16%
Claire 7/10 4471 days 14%
Denise 8/10 4472 days 15%
Denk 8/10 4484 days 15%
Klalis 10/10 4486 days 16%
Thomas 4/10 4490 days 11%
Mike 5/10 4491 days 12%
Debbie Mossman 9/10 4496 days 16%
Johann 10/10 4498 days 16%
Carina 10/10 4500 days 16%
Mat 8/10 4539 days 15%
Anette 7/10 4541 days 14%
midlands_missus 8/10 4543 days 15%
David 7/10 4599 days 14%
Suyin 10/10 4619 days 16%
Franz 10/10 4792 days 16%
Jennifer Baulch 7/10 4797 days 14%
George Jeffs 10/10 4800 days 16%
Jacob 9/10 4804 days 16%
Aharon 10/10 4819 days 16%
D.A. Mulder 8/10 4820 days 15%
Knol 8/10 4822 days 15%
Cole Penelope 8/10 4825 days 15%
Jody 7/10 4833 days 14%
Anna 5/10 4833 days 12%
Pauline Thai 8/10 4840 days 15%
Dan Adamson 8/10 4840 days 15%
Stephen Brightman 8/10 4849 days 15%
Madeleine Rowland 8/10 4849 days 15%
Bronwyn Gaby 9/10 4867 days 16%
Free_ride 9/10 4883 days 16%
Michael 9/10 4906 days 16%
Raul 10/10 5156 days 16%
TeamFlorida 9/10 5158 days 16%
TeamFlorida 8/10 5158 days 15%
James 9/10 5171 days 16%
Rudi 10/10 5175 days 16%
Rolf Kruger 10/10 5199 days 16%
Brian 10/10 5203 days 16%

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

-2.93% Adjustment

There may be an adjustment if this experience hasn't received any reviews within the last 85 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 -2.89%
198 -2.90%
199 -2.92%
200 -2.93%
201 -2.95%
202 -2.96%
203 -2.98%

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.