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

84.44%

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 Face-to-Face Weight Relative Weight
Dorothy and Graham Glen 9/10 472 days true 77.64 100%
Dan Coates 9/10 705 days true 34.92 45%
Dominik 9/10 705 days true 34.92 45%
Holloway 10/10 728 days true 31.61 40%
Christina 6/10 796 days true 23.0 29%
Barbara Knops 9/10 798 days true 22.77 29%
Manu Liberta 10/10 808 days true 21.66 27%
Bruno 9/10 818 days true 20.59 26%
Kirsty Smith 10/10 841 days true 18.27 23%
Sophia Satter 8/10 852 days true 17.23 22%
Afiya Levy 10/10 1073 days true 6.09 7%
Johannes Eisel 6/10 1082 days true 6.03 7%
Alexander Mattea 5/10 1082 days true 6.03 7%
Timea Bagosi 9/10 1084 days 5.02 6%
Riviere 8/10 1096 days true 6.0 7%
Dani 8/10 1098 days true 6.0 7%
Benoit Leclerc 7/10 1100 days true 5.99 7%
Anna Stoehr 10/10 1118 days true 5.96 7%
Kai Krchmar 6/10 1171 days true 5.88 7%
Kristina Farkas 5/10 1466 days true 5.39 6%
Sophia Kadel 10/10 1496 days true 5.34 6%
Laura and Marie 7/10 1502 days true 5.33 6%
Rachel S 10/10 1509 days 4.43 5%
Joris Giullemot 8/10 1818 days true 4.81 5%
Laura Metz 7/10 1829 days true 4.79 5%
Hubertus Thost 7/10 1829 days true 4.79 5%
Amanda 4/10 1844 days 3.7 4%
S B 10/10 1857 days true 4.75 5%
M K 10/10 1857 days true 4.75 5%
Maya Bakker-deDreu 8/10 1865 days true 4.73 5%
Christin Woelk 9/10 2145 days true 4.27 5%
Maria Klister 7/10 2165 days true 4.24 5%
Lydia Kleinkoenen 9/10 2185 days true 4.21 5%
Jessica Grewe 9/10 2185 days true 4.21 5%
Hannah Lia-Isis Kubillus 9/10 2185 days true 4.21 5%
Jan Zimmerman 8/10 2196 days true 4.19 5%
Margaret and Derek McNeil 10/10 2256 days true 4.09 5%
Frank and Suzanne 8/10 2271 days true 4.07 5%
RollingMoon 8/10 2332 days 3.31 4%
Marcel & Kim Meichtry 7/10 2552 days true 3.6 4%
Howell Davies 5/10 2555 days true 3.6 4%
Baas 7/10 2555 days true 3.6 4%
Pete & Pat Etheridge 8/10 2555 days true 3.6 4%
Siegfried Richter 7/10 2556 days true 3.6 4%
Melanie Mathiak 10/10 2558 days true 3.6 4%
Sig Schrattner 8/10 2558 days true 3.6 4%
Rebecca Doehl 7/10 2559 days true 3.59 4%
Seth & Carla 7/10 2560 days true 3.59 4%
Gabriele Wendt 9/10 2560 days true 3.59 4%
Tadej Ferjan 8/10 2560 days true 3.59 4%
Mary Mitchell 10/10 2560 days true 3.59 4%
Emily Wikston 9/10 2561 days true 3.59 4%
Andreas & Leonie Fehr 10/10 2567 days true 3.58 4%
Horst Langstein 9/10 2568 days true 3.58 4%
Marco Scheiber 9/10 2569 days true 3.58 4%
Friedrich Kaltner 10/10 2571 days true 3.57 4%
Frank & Julia 10/10 2574 days true 3.57 4%
Thyg Lingdal 10/10 2574 days true 3.57 4%
Nicole van Bergen 8/10 2574 days true 3.57 4%
Mike & April Prince 7/10 2588 days true 3.55 4%
Alfred & Henrike 8/10 2600 days true 3.53 4%
Lyn Stainton 6/10 2649 days true 3.45 4%
Ken Talan 10/10 2877 days true 3.07 3%
Jon_and_Family 9/10 2881 days 2.55 3%
Gertz 10/10 2885 days true 3.06 3%
Katarina Bokor 8/10 2889 days true 3.05 3%
Mark Franklin 6/10 2889 days true 3.05 3%
Gordon Agent 10/10 2889 days true 3.05 3%
Maureen Hardy 8/10 2889 days true 3.05 3%
AJ van Pelt 8/10 2889 days true 3.05 3%
Werner and Rita 9/10 2896 days true 3.04 3%
Richard Dudfield 10/10 2898 days true 3.04 3%
Sayaka 7/10 2898 days true 3.04 3%
Urs and Isabella 7/10 2899 days true 3.03 3%
Juliane Kleiu 10/10 2902 days true 3.03 3%
Linda Kremer 9/10 2903 days true 3.03 3%
Rebecca Johnston 9/10 2903 days true 3.03 3%
David Mellard 10/10 2904 days true 3.03 3%
Bruce & Elaine Chote 10/10 2904 days true 3.03 3%
Paul Nickson 8/10 2904 days true 3.03 3%
Monique 8/10 2904 days true 3.03 3%
Beat & Connie 10/10 2906 days true 3.02 3%
Alex Stil 9/10 2906 days true 3.02 3%
Pein van Nosrt 7/10 2911 days true 3.01 3%
Raith 9/10 2911 days true 3.01 3%
Elise van Haastert 8/10 2911 days true 3.01 3%
Claudia 10/10 2913 days true 3.01 3%
Carolin Ranner 6/10 2913 days true 3.01 3%
Winskowsky 9/10 2914 days true 3.01 3%
Hvid 9/10 2928 days true 2.99 3%
Judith K. 6/10 2930 days true 2.98 3%
Ruben and Jetske 7/10 2930 days true 2.98 3%
Roy Seymour 9/10 2931 days true 2.98 3%
Tom Hill 10/10 2935 days true 2.98 3%
Ruua Reyrink 7/10 2936 days true 2.97 3%
Patrick Hugener 9/10 2936 days true 2.97 3%
JohnHaestad 4/10 2940 days 2.3 2%
dollimyxture 10/10 2971 days 2.43 2%
aggiemary04 10/10 3063 days 2.3 2%
victoriauk 4/10 3185 days true 2.41 2%
Baumgarten 8/10 3213 days true 2.52 3%
travelbunnyadventures 8/10 3216 days 2.09 2%
Don & Geraldine 10/10 3252 days true 2.45 2%
Matthias & Ceristiane 8/10 3264 days true 2.43 2%
Hilary and Chris Ayton 9/10 3265 days true 2.43 2%
Lis & Rob Tate 9/10 3267 days true 2.43 2%
ccthornton100 10/10 3277 days 2.01 2%
Bob Kusesia 10/10 3278 days true 2.41 2%
Yssel de Schepper 7/10 3283 days true 2.4 2%
Janny Meerdinnk Veldboow 7/10 3283 days true 2.4 2%
Arie Ascher 9/10 3284 days true 2.4 2%
Wolfgang Engelke 10/10 3286 days true 2.4 2%
Thomas K 9/10 3286 days true 2.4 2%
Loleit 7/10 3298 days true 2.38 2%
Mattias Thorm 9/10 3299 days true 2.38 2%
Vincente Garrido 4/10 3300 days true 2.24 2%
R Gilge 10/10 3301 days true 2.37 2%
Erik Hummelmose 8/10 3301 days true 2.37 2%
Ian E 6/10 3301 days true 2.37 2%
Nadine Schaee 9/10 3302 days true 2.37 2%
Belinda Godhard 2/10 3302 days true 2.13 2%
Uwe Rieper 10/10 3304 days true 2.37 2%
E.M. Prideaux 10/10 3319 days true 2.34 2%
Elizabeth E 8/10 3321 days true 2.34 2%
Stevens Frans 8/10 3322 days true 2.34 2%
Heinrich Hax 9/10 3325 days true 2.33 2%
tanh 7/10 3352 days true 2.29 2%
Stephanie Steiner 8/10 3371 days true 2.26 2%
Julia May 9/10 3378 days true 2.25 2%
X Neils 7/10 3389 days true 2.23 2%
Sarah Smith 5/10 3393 days true 2.22 2%
Anna 6/10 3397 days 1.85 2%
OliverG1 7/10 3599 days true 1.88 2%
Philipp 5/10 3611 days true 1.86 2%
JasminA 5/10 3611 days true 1.86 2%
ChristinaV 8/10 3620 days true 1.85 2%
JuergenSchnitzer 9/10 3627 days true 1.84 2%
AstridVG 7/10 3627 days true 1.84 2%
NatasjaV 7/10 3629 days true 1.83 2%
JimmyK 7/10 3629 days true 1.83 2%
MarcoJ 9/10 3631 days true 1.83 2%
LucyPoland 9/10 3632 days true 1.83 2%
Stolz 7/10 3634 days true 1.83 2%
BrzezinskaM 10/10 3636 days true 1.82 2%
AndreB 10/10 3636 days true 1.82 2%
Linda 7/10 3642 days true 1.81 2%
Susan 8/10 3643 days true 1.81 2%
Byleveld 7/10 3644 days true 1.81 2%
JoseB 8/10 3645 days true 1.81 2%
JetteG 10/10 3645 days true 1.81 2%
CarolF 7/10 3646 days true 1.81 2%
Rachel 9/10 3660 days true 1.78 2%
Claire 7/10 3660 days true 1.78 2%
Denise 8/10 3661 days true 1.78 2%
Denk 8/10 3673 days true 1.76 2%
Klalis 10/10 3675 days true 1.76 2%
Thomas 4/10 3679 days true 1.65 1%
Mike 5/10 3680 days true 1.75 2%
Debbie Mossman 9/10 3686 days 1.45 1%
Johann 10/10 3687 days true 1.74 2%
Carina 10/10 3689 days true 1.74 2%
Mat 8/10 3728 days true 1.67 1%
Anette 7/10 3730 days true 1.67 1%
midlands_missus 8/10 3733 days 1.39 1%
David 7/10 3788 days true 1.57 1%
Suyin 10/10 3808 days true 1.54 1%
Franz 10/10 3982 days true 1.25 1%
Jennifer Baulch 7/10 3987 days true 1.25 1%
George Jeffs 10/10 3990 days true 1.24 1%
Jacob 9/10 3994 days true 1.23 1%
Aharon 10/10 4009 days true 1.21 1%
D.A. Mulder 8/10 4010 days true 1.21 1%
Knol 8/10 4012 days true 1.2 1%
Cole Penelope 8/10 4015 days true 1.2 1%
Jody 7/10 4023 days true 1.19 1%
Anna 5/10 4023 days true 1.19 1%
Pauline Thai 8/10 4030 days true 1.18 1%
Dan Adamson 8/10 4030 days true 1.18 1%
Stephen Brightman 8/10 4039 days true 1.16 1%
Madeleine Rowland 8/10 4039 days true 1.16 1%
Bronwyn Gaby 9/10 4057 days true 1.13 1%
Free_ride 9/10 4073 days 0.92 0%
Michael 9/10 4096 days true 1.07 1%
Raul 10/10 4346 days true 0.66 0%
TeamFlorida 9/10 4348 days true 0.65 0%
TeamFlorida 8/10 4348 days true 0.65 0%
James 9/10 4361 days true 0.63 0%
Rudi 10/10 4365 days true 0.62 0%
Rolf Kruger 10/10 4389 days true 0.59 0%
Brian 10/10 4393 days true 0.58 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

-7.28% 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 364 days. Adjustments are according to the following table.

Days Adjustment
361 -7.22%
362 -7.24%
363 -7.26%
364 -7.28%
365 -7.30%
366 -7.32%
367 -7.34%

Final Ranking Score

77%

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.