Ranking Score Explained

G'day, 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.

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Cymen Crick

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

83.53%

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 2660 days 100%
Dan Coates 9/10 2893 days 86%
Dominik 9/10 2893 days 86%
Holloway 10/10 2916 days 86%
Christina 6/10 2984 days 70%
Barbara Knops 9/10 2986 days 81%
Manu Liberta 10/10 2996 days 81%
Bruno 9/10 3006 days 80%
Kirsty Smith 10/10 3029 days 79%
Sophia Satter 8/10 3040 days 77%
Afiya Levy 10/10 3261 days 66%
Johannes Eisel 6/10 3270 days 56%
Alexander Mattea 5/10 3270 days 49%
Timea Bagosi 9/10 3273 days 64%
Riviere 8/10 3284 days 63%
Dani 8/10 3286 days 63%
Benoit Leclerc 7/10 3288 days 60%
Anna Stoehr 10/10 3306 days 63%
Kai Krchmar 6/10 3359 days 51%
Kristina Farkas 5/10 3654 days 32%
Sophia Kadel 10/10 3684 days 41%
Laura and Marie 7/10 3690 days 37%
Rachel S 10/10 3698 days 40%
Joris Giullemot 8/10 4006 days 21%
Laura Metz 7/10 4017 days 20%
Hubertus Thost 7/10 4017 days 20%
Amanda 4/10 4032 days 13%
S B 10/10 4045 days 19%
M K 10/10 4045 days 19%
Maya Bakker-deDreu 8/10 4053 days 18%
Christin Woelk 9/10 4333 days 2%
Maria Klister 7/10 4353 days 1%
Lydia Kleinkoenen 9/10 4373 days 0%
Jessica Grewe 9/10 4373 days 0%
Hannah Lia-Isis Kubillus 9/10 4373 days 0%
Jan Zimmerman 8/10 4384 days 29%
Margaret and Derek McNeil 10/10 4444 days 30%
Frank and Suzanne 8/10 4459 days 29%
RollingMoon 8/10 4520 days 29%
Marcel & Kim Meichtry 7/10 4740 days 28%
Howell Davies 5/10 4743 days 23%
Baas 7/10 4743 days 28%
Pete & Pat Etheridge 8/10 4743 days 29%
Siegfried Richter 7/10 4744 days 28%
Melanie Mathiak 10/10 4746 days 30%
Sig Schrattner 8/10 4746 days 29%
Rebecca Doehl 7/10 4747 days 28%
Seth & Carla 7/10 4748 days 28%
Gabriele Wendt 9/10 4748 days 29%
Tadej Ferjan 8/10 4748 days 29%
Mary Mitchell 10/10 4748 days 30%
Emily Wikston 9/10 4749 days 29%
Andreas & Leonie Fehr 10/10 4755 days 30%
Horst Langstein 9/10 4756 days 29%
Marco Scheiber 9/10 4757 days 29%
Friedrich Kaltner 10/10 4759 days 30%
Frank & Julia 10/10 4762 days 30%
Thyg Lingdal 10/10 4762 days 30%
Nicole van Bergen 8/10 4762 days 29%
Mike & April Prince 7/10 4776 days 28%
Alfred & Henrike 8/10 4788 days 29%
Lyn Stainton 6/10 4837 days 26%
Ken Talan 10/10 5065 days 30%
Jon_and_Family 9/10 5069 days 29%
Gertz 10/10 5073 days 30%
Katarina Bokor 8/10 5077 days 29%
Mark Franklin 6/10 5077 days 26%
Gordon Agent 10/10 5077 days 30%
Maureen Hardy 8/10 5077 days 29%
AJ van Pelt 8/10 5077 days 29%
Werner and Rita 9/10 5084 days 29%
Richard Dudfield 10/10 5086 days 30%
Sayaka 7/10 5086 days 28%
Urs and Isabella 7/10 5087 days 28%
Juliane Kleiu 10/10 5090 days 30%
Linda Kremer 9/10 5091 days 29%
Rebecca Johnston 9/10 5091 days 29%
David Mellard 10/10 5092 days 30%
Bruce & Elaine Chote 10/10 5092 days 30%
Paul Nickson 8/10 5092 days 29%
Monique 8/10 5092 days 29%
Beat & Connie 10/10 5094 days 30%
Alex Stil 9/10 5094 days 29%
Pein van Nosrt 7/10 5099 days 28%
Raith 9/10 5099 days 29%
Elise van Haastert 8/10 5099 days 29%
Claudia 10/10 5101 days 30%
Carolin Ranner 6/10 5101 days 26%
Winskowsky 9/10 5102 days 29%
Hvid 9/10 5116 days 29%
Judith K. 6/10 5118 days 26%
Ruben and Jetske 7/10 5118 days 28%
Roy Seymour 9/10 5119 days 29%
Tom Hill 10/10 5123 days 30%
Ruua Reyrink 7/10 5124 days 28%
Patrick Hugener 9/10 5124 days 29%
JohnHaestad 4/10 5128 days 19%
dollimyxture 10/10 5159 days 30%
aggiemary04 10/10 5251 days 30%
victoriauk 4/10 5373 days 19%
Baumgarten 8/10 5401 days 29%
travelbunnyadventures 8/10 5404 days 29%
Don & Geraldine 10/10 5440 days 30%
Matthias & Ceristiane 8/10 5452 days 29%
Hilary and Chris Ayton 9/10 5453 days 29%
Lis & Rob Tate 9/10 5455 days 29%
ccthornton100 10/10 5465 days 30%
Bob Kusesia 10/10 5466 days 30%
Yssel de Schepper 7/10 5471 days 28%
Janny Meerdinnk Veldboow 7/10 5471 days 28%
Arie Ascher 9/10 5472 days 29%
Wolfgang Engelke 10/10 5474 days 30%
Thomas K 9/10 5474 days 29%
Loleit 7/10 5486 days 28%
Mattias Thorm 9/10 5487 days 29%
Vincente Garrido 4/10 5488 days 19%
R Gilge 10/10 5489 days 30%
Erik Hummelmose 8/10 5489 days 29%
Ian E 6/10 5489 days 26%
Nadine Schaee 9/10 5490 days 29%
Belinda Godhard 2/10 5490 days 13%
Uwe Rieper 10/10 5492 days 30%
E.M. Prideaux 10/10 5507 days 30%
Elizabeth E 8/10 5509 days 29%
Stevens Frans 8/10 5510 days 29%
Heinrich Hax 9/10 5513 days 29%
tanh 7/10 5540 days 28%
Stephanie Steiner 8/10 5559 days 29%
Julia May 9/10 5566 days 29%
X Neils 7/10 5577 days 28%
Sarah Smith 5/10 5581 days 23%
Anna 6/10 5585 days 26%
OliverG1 7/10 5787 days 28%
Philipp 5/10 5799 days 23%
JasminA 5/10 5799 days 23%
ChristinaV 8/10 5809 days 29%
JuergenSchnitzer 9/10 5815 days 29%
AstridVG 7/10 5816 days 28%
NatasjaV 7/10 5817 days 28%
JimmyK 7/10 5817 days 28%
MarcoJ 9/10 5819 days 29%
LucyPoland 9/10 5820 days 29%
Stolz 7/10 5823 days 28%
BrzezinskaM 10/10 5824 days 30%
AndreB 10/10 5824 days 30%
Linda 7/10 5831 days 28%
Susan 8/10 5832 days 29%
Byleveld 7/10 5832 days 28%
JoseB 8/10 5833 days 29%
JetteG 10/10 5833 days 30%
CarolF 7/10 5834 days 28%
Rachel 9/10 5849 days 29%
Claire 7/10 5849 days 28%
Denise 8/10 5850 days 29%
Denk 8/10 5862 days 29%
Klalis 10/10 5864 days 30%
Thomas 4/10 5868 days 19%
Mike 5/10 5869 days 23%
Debbie Mossman 9/10 5874 days 29%
Johann 10/10 5876 days 30%
Carina 10/10 5878 days 30%
Mat 8/10 5917 days 29%
Anette 7/10 5919 days 28%
midlands_missus 8/10 5921 days 29%
David 7/10 5977 days 28%
Suyin 10/10 5997 days 30%
Franz 10/10 6170 days 30%
Jennifer Baulch 7/10 6175 days 28%
George Jeffs 10/10 6178 days 30%
Jacob 9/10 6182 days 29%
Aharon 10/10 6197 days 30%
D.A. Mulder 8/10 6198 days 29%
Knol 8/10 6200 days 29%
Cole Penelope 8/10 6203 days 29%
Jody 7/10 6211 days 28%
Anna 5/10 6211 days 23%
Pauline Thai 8/10 6218 days 29%
Dan Adamson 8/10 6218 days 29%
Stephen Brightman 8/10 6227 days 29%
Madeleine Rowland 8/10 6227 days 29%
Bronwyn Gaby 9/10 6245 days 29%
Free_ride 9/10 6261 days 29%
Michael 9/10 6284 days 29%
Raul 10/10 6534 days 30%
TeamFlorida 9/10 6536 days 29%
TeamFlorida 8/10 6536 days 29%
James 9/10 6549 days 29%
Rudi 10/10 6553 days 30%
Rolf Kruger 10/10 6577 days 30%
Brian 10/10 6581 days 30%

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

-4.15% Adjustment

There may be an adjustment if this experience hasn't received any reviews within the last 52 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 -4.09%
198 -4.11%
199 -4.13%
200 -4.15%
201 -4.17%
202 -4.19%
203 -4.22%

Balancing Adjustment

3.17% 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

83%

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.