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

84.91%

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 9/10 109 days 100%
Dan Coates 9/10 342 days 83%
Dominik 9/10 342 days 83%
Holloway 10/10 365 days 80%
Christina 6/10 433 days 71%
Barbara Knops 9/10 435 days 71%
Manu Liberta 10/10 445 days 70%
Bruno 9/10 455 days 68%
Kirsty Smith 10/10 478 days 65%
Sophia Satter 8/10 489 days 63%
Afiya Levy 10/10 710 days 28%
Johannes Eisel 6/10 719 days 27%
Alexander Mattea 5/10 719 days 27%
Timea Bagosi 9/10 722 days 22%
Riviere 8/10 733 days 26%
Dani 8/10 735 days 25%
Benoit Leclerc 7/10 737 days 25%
Anna Stoehr 10/10 755 days 23%
Kai Krchmar 6/10 808 days 18%
Kristina Farkas 5/10 1103 days 4%
Sophia Kadel 10/10 1133 days 4%
Laura and Marie 7/10 1139 days 4%
Rachel S 10/10 1147 days 3%
Joris Giullemot 8/10 1455 days 4%
Laura Metz 7/10 1466 days 4%
Hubertus Thost 7/10 1466 days 4%
Amanda 4/10 1481 days 3%
S B 10/10 1494 days 4%
M K 10/10 1494 days 4%
Maya Bakker-deDreu 8/10 1502 days 4%
Christin Woelk 9/10 1782 days 3%
Maria Klister 7/10 1802 days 3%
Lydia Kleinkoenen 9/10 1822 days 3%
Jessica Grewe 9/10 1822 days 3%
Hannah Lia-Isis Kubillus 9/10 1822 days 3%
Jan Zimmerman 8/10 1833 days 3%
Margaret and Derek McNeil 10/10 1893 days 3%
Frank and Suzanne 8/10 1908 days 3%
RollingMoon 8/10 1969 days 2%
Marcel & Kim Meichtry 7/10 2189 days 3%
Howell Davies 5/10 2192 days 3%
Baas 7/10 2192 days 3%
Pete & Pat Etheridge 8/10 2192 days 3%
Siegfried Richter 7/10 2193 days 3%
Melanie Mathiak 10/10 2195 days 3%
Sig Schrattner 8/10 2195 days 3%
Rebecca Doehl 7/10 2196 days 3%
Seth & Carla 7/10 2197 days 3%
Gabriele Wendt 9/10 2197 days 3%
Tadej Ferjan 8/10 2197 days 3%
Mary Mitchell 10/10 2197 days 3%
Emily Wikston 9/10 2198 days 3%
Andreas & Leonie Fehr 10/10 2204 days 3%
Horst Langstein 9/10 2205 days 3%
Marco Scheiber 9/10 2206 days 3%
Friedrich Kaltner 10/10 2208 days 3%
Frank & Julia 10/10 2211 days 3%
Thyg Lingdal 10/10 2211 days 3%
Nicole van Bergen 8/10 2211 days 3%
Mike & April Prince 7/10 2225 days 3%
Alfred & Henrike 8/10 2237 days 3%
Lyn Stainton 6/10 2286 days 2%
Ken Talan 10/10 2514 days 2%
Jon_and_Family 9/10 2518 days 2%
Gertz 10/10 2522 days 2%
Katarina Bokor 8/10 2526 days 2%
Mark Franklin 6/10 2526 days 2%
Gordon Agent 10/10 2526 days 2%
Maureen Hardy 8/10 2526 days 2%
AJ van Pelt 8/10 2526 days 2%
Werner and Rita 9/10 2533 days 2%
Richard Dudfield 10/10 2535 days 2%
Sayaka 7/10 2535 days 2%
Urs and Isabella 7/10 2536 days 2%
Juliane Kleiu 10/10 2539 days 2%
Linda Kremer 9/10 2540 days 2%
Rebecca Johnston 9/10 2540 days 2%
David Mellard 10/10 2541 days 2%
Bruce & Elaine Chote 10/10 2541 days 2%
Paul Nickson 8/10 2541 days 2%
Monique 8/10 2541 days 2%
Beat & Connie 10/10 2543 days 2%
Alex Stil 9/10 2543 days 2%
Pein van Nosrt 7/10 2548 days 2%
Raith 9/10 2548 days 2%
Elise van Haastert 8/10 2548 days 2%
Claudia 10/10 2550 days 2%
Carolin Ranner 6/10 2550 days 2%
Winskowsky 9/10 2551 days 2%
Hvid 9/10 2565 days 2%
Judith K. 6/10 2567 days 2%
Ruben and Jetske 7/10 2567 days 2%
Roy Seymour 9/10 2568 days 2%
Tom Hill 10/10 2572 days 2%
Ruua Reyrink 7/10 2573 days 2%
Patrick Hugener 9/10 2573 days 2%
JohnHaestad 4/10 2577 days 1%
dollimyxture 10/10 2608 days 2%
aggiemary04 10/10 2700 days 1%
victoriauk 4/10 2822 days 2%
Baumgarten 8/10 2850 days 2%
travelbunnyadventures 8/10 2853 days 1%
Don & Geraldine 10/10 2889 days 2%
Matthias & Ceristiane 8/10 2901 days 2%
Hilary and Chris Ayton 9/10 2902 days 2%
Lis & Rob Tate 9/10 2904 days 2%
ccthornton100 10/10 2914 days 1%
Bob Kusesia 10/10 2915 days 2%
Yssel de Schepper 7/10 2920 days 2%
Janny Meerdinnk Veldboow 7/10 2920 days 2%
Arie Ascher 9/10 2921 days 2%
Wolfgang Engelke 10/10 2923 days 2%
Thomas K 9/10 2923 days 2%
Loleit 7/10 2935 days 2%
Mattias Thorm 9/10 2936 days 2%
Vincente Garrido 4/10 2937 days 1%
R Gilge 10/10 2938 days 2%
Erik Hummelmose 8/10 2938 days 2%
Ian E 6/10 2938 days 2%
Nadine Schaee 9/10 2939 days 2%
Belinda Godhard 2/10 2939 days 1%
Uwe Rieper 10/10 2941 days 2%
E.M. Prideaux 10/10 2956 days 2%
Elizabeth E 8/10 2958 days 2%
Stevens Frans 8/10 2959 days 2%
Heinrich Hax 9/10 2962 days 2%
tanh 7/10 2989 days 1%
Stephanie Steiner 8/10 3008 days 1%
Julia May 9/10 3015 days 1%
X Neils 7/10 3026 days 1%
Sarah Smith 5/10 3030 days 1%
Anna 6/10 3034 days 1%
OliverG1 7/10 3236 days 1%
Philipp 5/10 3248 days 1%
JasminA 5/10 3248 days 1%
ChristinaV 8/10 3257 days 1%
JuergenSchnitzer 9/10 3264 days 1%
AstridVG 7/10 3264 days 1%
NatasjaV 7/10 3266 days 1%
JimmyK 7/10 3266 days 1%
MarcoJ 9/10 3268 days 1%
LucyPoland 9/10 3269 days 1%
Stolz 7/10 3271 days 1%
BrzezinskaM 10/10 3273 days 1%
AndreB 10/10 3273 days 1%
Linda 7/10 3279 days 1%
Susan 8/10 3280 days 1%
Byleveld 7/10 3281 days 1%
JoseB 8/10 3282 days 1%
JetteG 10/10 3282 days 1%
CarolF 7/10 3283 days 1%
Rachel 9/10 3297 days 1%
Claire 7/10 3297 days 1%
Denise 8/10 3299 days 1%
Denk 8/10 3310 days 1%
Klalis 10/10 3313 days 1%
Thomas 4/10 3316 days 1%
Mike 5/10 3317 days 1%
Debbie Mossman 9/10 3323 days 1%
Johann 10/10 3324 days 1%
Carina 10/10 3326 days 1%
Mat 8/10 3365 days 1%
Anette 7/10 3367 days 1%
midlands_missus 8/10 3370 days 1%
David 7/10 3425 days 1%
Suyin 10/10 3446 days 1%
Franz 10/10 3619 days 1%
Jennifer Baulch 7/10 3624 days 1%
George Jeffs 10/10 3627 days 1%
Jacob 9/10 3631 days 1%
Aharon 10/10 3646 days 1%
D.A. Mulder 8/10 3647 days 1%
Knol 8/10 3649 days 1%
Cole Penelope 8/10 3652 days 1%
Jody 7/10 3660 days 1%
Anna 5/10 3660 days 1%
Pauline Thai 8/10 3667 days 1%
Dan Adamson 8/10 3667 days 1%
Stephen Brightman 8/10 3676 days 0%
Madeleine Rowland 8/10 3676 days 0%
Bronwyn Gaby 9/10 3694 days 0%
Free_ride 9/10 3710 days 0%
Michael 9/10 3733 days 0%
Raul 10/10 3983 days 0%
TeamFlorida 9/10 3985 days 0%
TeamFlorida 8/10 3985 days 0%
James 9/10 3998 days 0%
Rudi 10/10 4002 days 0%
Rolf Kruger 10/10 4026 days 0%
Brian 10/10 4030 days 0%

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

-1.82% Adjustment

There may be an adjustment if an experience hasn't received any reviews within the last 60 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 364 days.

The Te Anau Glowworm Caves experience has been adjusted for 91 days. Adjustments are according to the following table.

Days Adjustment
88 -1.76%
89 -1.78%
90 -1.80%
91 -1.82%
92 -1.84%
93 -1.86%
94 -1.88%

Final Ranking Score

83%

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.