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 1279 days 100%
Dan Coates 9/10 1512 days 89%
Dominik 9/10 1512 days 89%
Holloway 10/10 1535 days 88%
Christina 6/10 1603 days 70%
Barbara Knops 9/10 1605 days 85%
Manu Liberta 10/10 1615 days 85%
Bruno 9/10 1625 days 84%
Kirsty Smith 10/10 1648 days 83%
Sophia Satter 8/10 1659 days 78%
Afiya Levy 10/10 1880 days 73%
Johannes Eisel 6/10 1889 days 59%
Alexander Mattea 5/10 1889 days 57%
Timea Bagosi 9/10 1892 days 72%
Riviere 8/10 1903 days 68%
Dani 8/10 1905 days 68%
Benoit Leclerc 7/10 1907 days 64%
Anna Stoehr 10/10 1925 days 71%
Kai Krchmar 6/10 1978 days 56%
Kristina Farkas 5/10 2273 days 43%
Sophia Kadel 10/10 2303 days 54%
Laura and Marie 7/10 2309 days 48%
Rachel S 10/10 2317 days 53%
Joris Giullemot 8/10 2625 days 37%
Laura Metz 7/10 2636 days 34%
Hubertus Thost 7/10 2636 days 34%
Amanda 4/10 2651 days 28%
S B 10/10 2664 days 37%
M K 10/10 2664 days 37%
Maya Bakker-deDreu 8/10 2672 days 35%
Christin Woelk 9/10 2952 days 24%
Maria Klister 7/10 2972 days 21%
Lydia Kleinkoenen 9/10 2992 days 22%
Jessica Grewe 9/10 2992 days 22%
Hannah Lia-Isis Kubillus 9/10 2992 days 22%
Jan Zimmerman 8/10 3003 days 21%
Margaret and Derek McNeil 10/10 3063 days 19%
Frank and Suzanne 8/10 3078 days 17%
RollingMoon 8/10 3139 days 15%
Marcel & Kim Meichtry 7/10 3359 days 5%
Howell Davies 5/10 3362 days 3%
Baas 7/10 3362 days 5%
Pete & Pat Etheridge 8/10 3362 days 5%
Siegfried Richter 7/10 3363 days 5%
Melanie Mathiak 10/10 3365 days 6%
Sig Schrattner 8/10 3365 days 5%
Rebecca Doehl 7/10 3366 days 4%
Seth & Carla 7/10 3367 days 4%
Gabriele Wendt 9/10 3367 days 6%
Tadej Ferjan 8/10 3367 days 5%
Mary Mitchell 10/10 3367 days 6%
Emily Wikston 9/10 3368 days 5%
Andreas & Leonie Fehr 10/10 3374 days 5%
Horst Langstein 9/10 3375 days 5%
Marco Scheiber 9/10 3376 days 5%
Friedrich Kaltner 10/10 3378 days 5%
Frank & Julia 10/10 3381 days 5%
Thyg Lingdal 10/10 3381 days 5%
Nicole van Bergen 8/10 3381 days 4%
Mike & April Prince 7/10 3395 days 3%
Alfred & Henrike 8/10 3407 days 3%
Lyn Stainton 6/10 3456 days 0%
Ken Talan 10/10 3684 days 16%
Jon_and_Family 9/10 3688 days 16%
Gertz 10/10 3692 days 16%
Katarina Bokor 8/10 3696 days 15%
Mark Franklin 6/10 3696 days 12%
Gordon Agent 10/10 3696 days 16%
Maureen Hardy 8/10 3696 days 15%
AJ van Pelt 8/10 3696 days 15%
Werner and Rita 9/10 3703 days 16%
Richard Dudfield 10/10 3705 days 16%
Sayaka 7/10 3705 days 14%
Urs and Isabella 7/10 3706 days 14%
Juliane Kleiu 10/10 3709 days 16%
Linda Kremer 9/10 3710 days 16%
Rebecca Johnston 9/10 3710 days 16%
David Mellard 10/10 3711 days 16%
Bruce & Elaine Chote 10/10 3711 days 16%
Paul Nickson 8/10 3711 days 15%
Monique 8/10 3711 days 15%
Beat & Connie 10/10 3713 days 16%
Alex Stil 9/10 3713 days 16%
Pein van Nosrt 7/10 3718 days 14%
Raith 9/10 3718 days 16%
Elise van Haastert 8/10 3718 days 15%
Claudia 10/10 3720 days 16%
Carolin Ranner 6/10 3720 days 12%
Winskowsky 9/10 3721 days 16%
Hvid 9/10 3735 days 16%
Judith K. 6/10 3737 days 12%
Ruben and Jetske 7/10 3737 days 14%
Roy Seymour 9/10 3738 days 16%
Tom Hill 10/10 3742 days 16%
Ruua Reyrink 7/10 3743 days 14%
Patrick Hugener 9/10 3743 days 16%
JohnHaestad 4/10 3747 days 11%
dollimyxture 10/10 3778 days 16%
aggiemary04 10/10 3870 days 16%
victoriauk 4/10 3992 days 11%
Baumgarten 8/10 4020 days 15%
travelbunnyadventures 8/10 4023 days 15%
Don & Geraldine 10/10 4059 days 16%
Matthias & Ceristiane 8/10 4071 days 15%
Hilary and Chris Ayton 9/10 4072 days 16%
Lis & Rob Tate 9/10 4074 days 16%
ccthornton100 10/10 4084 days 16%
Bob Kusesia 10/10 4085 days 16%
Yssel de Schepper 7/10 4090 days 14%
Janny Meerdinnk Veldboow 7/10 4090 days 14%
Arie Ascher 9/10 4091 days 16%
Wolfgang Engelke 10/10 4093 days 16%
Thomas K 9/10 4093 days 16%
Loleit 7/10 4105 days 14%
Mattias Thorm 9/10 4106 days 16%
Vincente Garrido 4/10 4107 days 11%
R Gilge 10/10 4108 days 16%
Erik Hummelmose 8/10 4108 days 15%
Ian E 6/10 4108 days 12%
Nadine Schaee 9/10 4109 days 16%
Belinda Godhard 2/10 4109 days 10%
Uwe Rieper 10/10 4111 days 16%
E.M. Prideaux 10/10 4126 days 16%
Elizabeth E 8/10 4128 days 15%
Stevens Frans 8/10 4129 days 15%
Heinrich Hax 9/10 4132 days 16%
tanh 7/10 4159 days 14%
Stephanie Steiner 8/10 4178 days 15%
Julia May 9/10 4185 days 16%
X Neils 7/10 4196 days 14%
Sarah Smith 5/10 4200 days 11%
Anna 6/10 4204 days 12%
OliverG1 7/10 4406 days 14%
Philipp 5/10 4418 days 11%
JasminA 5/10 4418 days 11%
ChristinaV 8/10 4428 days 15%
JuergenSchnitzer 9/10 4434 days 16%
AstridVG 7/10 4434 days 14%
NatasjaV 7/10 4436 days 14%
JimmyK 7/10 4436 days 14%
MarcoJ 9/10 4438 days 16%
LucyPoland 9/10 4439 days 16%
Stolz 7/10 4442 days 14%
BrzezinskaM 10/10 4443 days 16%
AndreB 10/10 4443 days 16%
Linda 7/10 4450 days 14%
Susan 8/10 4451 days 15%
Byleveld 7/10 4451 days 14%
JoseB 8/10 4452 days 15%
JetteG 10/10 4452 days 16%
CarolF 7/10 4453 days 14%
Rachel 9/10 4467 days 16%
Claire 7/10 4467 days 14%
Denise 8/10 4469 days 15%
Denk 8/10 4480 days 15%
Klalis 10/10 4483 days 16%
Thomas 4/10 4486 days 11%
Mike 5/10 4487 days 11%
Debbie Mossman 9/10 4493 days 16%
Johann 10/10 4495 days 16%
Carina 10/10 4497 days 16%
Mat 8/10 4535 days 15%
Anette 7/10 4537 days 14%
midlands_missus 8/10 4540 days 15%
David 7/10 4596 days 14%
Suyin 10/10 4616 days 16%
Franz 10/10 4789 days 16%
Jennifer Baulch 7/10 4794 days 14%
George Jeffs 10/10 4797 days 16%
Jacob 9/10 4801 days 16%
Aharon 10/10 4816 days 16%
D.A. Mulder 8/10 4817 days 15%
Knol 8/10 4819 days 15%
Cole Penelope 8/10 4822 days 15%
Jody 7/10 4830 days 14%
Anna 5/10 4830 days 11%
Pauline Thai 8/10 4837 days 15%
Dan Adamson 8/10 4837 days 15%
Stephen Brightman 8/10 4846 days 15%
Madeleine Rowland 8/10 4846 days 15%
Bronwyn Gaby 9/10 4864 days 16%
Free_ride 9/10 4880 days 16%
Michael 9/10 4903 days 16%
Raul 10/10 5153 days 16%
TeamFlorida 9/10 5155 days 16%
TeamFlorida 8/10 5155 days 15%
James 9/10 5168 days 16%
Rudi 10/10 5172 days 16%
Rolf Kruger 10/10 5196 days 16%
Brian 10/10 5200 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

-3.00% Adjustment

There may be an adjustment if this experience hasn't received any reviews within the last 82 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 -2.96%
198 -2.97%
199 -2.99%
200 -3.00%
201 -3.02%
202 -3.03%
203 -3.05%

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.