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

84.90%

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 9/10 381 days true 92.4 100%
Dan Coates 9/10 614 days true 49.99 54%
Dominik 9/10 614 days true 49.99 54%
Holloway 10/10 637 days true 45.89 49%
Christina 6/10 705 days true 34.92 37%
Barbara Knops 9/10 707 days true 34.63 37%
Manu Liberta 10/10 717 days true 33.17 35%
Bruno 9/10 727 days true 31.75 34%
Kirsty Smith 10/10 750 days true 28.63 30%
Sophia Satter 8/10 761 days true 27.21 29%
Afiya Levy 10/10 982 days true 8.43 8%
Johannes Eisel 6/10 991 days true 8.06 8%
Alexander Mattea 5/10 991 days true 8.06 8%
Timea Bagosi 9/10 993 days 6.65 6%
Riviere 8/10 1005 days true 7.54 7%
Dani 8/10 1007 days true 7.47 7%
Benoit Leclerc 7/10 1009 days true 7.41 7%
Anna Stoehr 10/10 1027 days true 6.88 7%
Kai Krchmar 6/10 1080 days true 6.04 6%
Kristina Farkas 5/10 1375 days true 5.54 5%
Sophia Kadel 10/10 1405 days true 5.49 5%
Laura and Marie 7/10 1411 days true 5.48 5%
Rachel S 10/10 1418 days 4.56 4%
Joris Giullemot 8/10 1727 days true 4.96 5%
Laura Metz 7/10 1738 days true 4.94 5%
Hubertus Thost 7/10 1738 days true 4.94 5%
Amanda 4/10 1753 days 3.81 3%
S B 10/10 1766 days true 4.9 5%
M K 10/10 1766 days true 4.9 5%
Maya Bakker-deDreu 8/10 1774 days true 4.88 5%
Christin Woelk 9/10 2054 days true 4.42 4%
Maria Klister 7/10 2074 days true 4.39 4%
Lydia Kleinkoenen 9/10 2094 days true 4.36 4%
Jessica Grewe 9/10 2094 days true 4.36 4%
Hannah Lia-Isis Kubillus 9/10 2094 days true 4.36 4%
Jan Zimmerman 8/10 2105 days true 4.34 4%
Margaret and Derek McNeil 10/10 2165 days true 4.24 4%
Frank and Suzanne 8/10 2180 days true 4.22 4%
RollingMoon 8/10 2241 days 3.43 3%
Marcel & Kim Meichtry 7/10 2461 days true 3.75 3%
Howell Davies 5/10 2464 days true 3.75 3%
Baas 7/10 2464 days true 3.75 3%
Pete & Pat Etheridge 8/10 2464 days true 3.75 3%
Siegfried Richter 7/10 2465 days true 3.75 3%
Melanie Mathiak 10/10 2467 days true 3.74 3%
Sig Schrattner 8/10 2467 days true 3.74 3%
Rebecca Doehl 7/10 2468 days true 3.74 3%
Seth & Carla 7/10 2469 days true 3.74 3%
Gabriele Wendt 9/10 2469 days true 3.74 3%
Tadej Ferjan 8/10 2469 days true 3.74 3%
Mary Mitchell 10/10 2469 days true 3.74 3%
Emily Wikston 9/10 2470 days true 3.74 3%
Andreas & Leonie Fehr 10/10 2476 days true 3.73 3%
Horst Langstein 9/10 2477 days true 3.73 3%
Marco Scheiber 9/10 2478 days true 3.73 3%
Friedrich Kaltner 10/10 2480 days true 3.72 3%
Frank & Julia 10/10 2483 days true 3.72 3%
Thyg Lingdal 10/10 2483 days true 3.72 3%
Nicole van Bergen 8/10 2483 days true 3.72 3%
Mike & April Prince 7/10 2497 days true 3.7 3%
Alfred & Henrike 8/10 2509 days true 3.68 3%
Lyn Stainton 6/10 2558 days true 3.6 3%
Ken Talan 10/10 2786 days true 3.22 3%
Jon_and_Family 9/10 2790 days 2.68 2%
Gertz 10/10 2794 days true 3.21 3%
Katarina Bokor 8/10 2798 days true 3.2 3%
Mark Franklin 6/10 2798 days true 3.2 3%
Gordon Agent 10/10 2798 days true 3.2 3%
Maureen Hardy 8/10 2798 days true 3.2 3%
AJ van Pelt 8/10 2798 days true 3.2 3%
Werner and Rita 9/10 2805 days true 3.19 3%
Richard Dudfield 10/10 2807 days true 3.19 3%
Sayaka 7/10 2807 days true 3.19 3%
Urs and Isabella 7/10 2808 days true 3.18 3%
Juliane Kleiu 10/10 2811 days true 3.18 3%
Linda Kremer 9/10 2812 days true 3.18 3%
Rebecca Johnston 9/10 2812 days true 3.18 3%
David Mellard 10/10 2813 days true 3.18 3%
Bruce & Elaine Chote 10/10 2813 days true 3.18 3%
Paul Nickson 8/10 2813 days true 3.18 3%
Monique 8/10 2813 days true 3.18 3%
Beat & Connie 10/10 2815 days true 3.17 3%
Alex Stil 9/10 2815 days true 3.17 3%
Pein van Nosrt 7/10 2820 days true 3.16 3%
Raith 9/10 2820 days true 3.16 3%
Elise van Haastert 8/10 2820 days true 3.16 3%
Claudia 10/10 2822 days true 3.16 3%
Carolin Ranner 6/10 2822 days true 3.16 3%
Winskowsky 9/10 2823 days true 3.16 3%
Hvid 9/10 2837 days true 3.14 3%
Judith K. 6/10 2839 days true 3.13 3%
Ruben and Jetske 7/10 2839 days true 3.13 3%
Roy Seymour 9/10 2840 days true 3.13 3%
Tom Hill 10/10 2844 days true 3.12 3%
Ruua Reyrink 7/10 2845 days true 3.12 3%
Patrick Hugener 9/10 2845 days true 3.12 3%
JohnHaestad 4/10 2849 days 2.42 2%
dollimyxture 10/10 2880 days 2.55 2%
aggiemary04 10/10 2972 days 2.43 2%
victoriauk 4/10 3094 days true 2.56 2%
Baumgarten 8/10 3122 days true 2.67 2%
travelbunnyadventures 8/10 3125 days 2.22 2%
Don & Geraldine 10/10 3161 days true 2.6 2%
Matthias & Ceristiane 8/10 3173 days true 2.58 2%
Hilary and Chris Ayton 9/10 3174 days true 2.58 2%
Lis & Rob Tate 9/10 3176 days true 2.58 2%
ccthornton100 10/10 3186 days 2.14 2%
Bob Kusesia 10/10 3187 days true 2.56 2%
Yssel de Schepper 7/10 3192 days true 2.55 2%
Janny Meerdinnk Veldboow 7/10 3192 days true 2.55 2%
Arie Ascher 9/10 3193 days true 2.55 2%
Wolfgang Engelke 10/10 3195 days true 2.55 2%
Thomas K 9/10 3195 days true 2.55 2%
Loleit 7/10 3207 days true 2.53 2%
Mattias Thorm 9/10 3208 days true 2.53 2%
Vincente Garrido 4/10 3209 days true 2.38 2%
R Gilge 10/10 3210 days true 2.52 2%
Erik Hummelmose 8/10 3210 days true 2.52 2%
Ian E 6/10 3210 days true 2.52 2%
Nadine Schaee 9/10 3211 days true 2.52 2%
Belinda Godhard 2/10 3211 days true 2.27 2%
Uwe Rieper 10/10 3213 days true 2.52 2%
E.M. Prideaux 10/10 3228 days true 2.49 2%
Elizabeth E 8/10 3230 days true 2.49 2%
Stevens Frans 8/10 3231 days true 2.49 2%
Heinrich Hax 9/10 3234 days true 2.48 2%
tanh 7/10 3261 days true 2.44 2%
Stephanie Steiner 8/10 3280 days true 2.41 2%
Julia May 9/10 3287 days true 2.4 2%
X Neils 7/10 3298 days true 2.38 2%
Sarah Smith 5/10 3302 days true 2.37 2%
Anna 6/10 3306 days 1.97 1%
OliverG1 7/10 3508 days true 2.03 1%
Philipp 5/10 3520 days true 2.01 1%
JasminA 5/10 3520 days true 2.01 1%
ChristinaV 8/10 3529 days true 2.0 1%
JuergenSchnitzer 9/10 3536 days true 1.99 1%
AstridVG 7/10 3536 days true 1.99 1%
NatasjaV 7/10 3538 days true 1.98 1%
JimmyK 7/10 3538 days true 1.98 1%
MarcoJ 9/10 3540 days true 1.98 1%
LucyPoland 9/10 3541 days true 1.98 1%
Stolz 7/10 3543 days true 1.98 1%
BrzezinskaM 10/10 3545 days true 1.97 1%
AndreB 10/10 3545 days true 1.97 1%
Linda 7/10 3551 days true 1.96 1%
Susan 8/10 3552 days true 1.96 1%
Byleveld 7/10 3553 days true 1.96 1%
JoseB 8/10 3554 days true 1.96 1%
JetteG 10/10 3554 days true 1.96 1%
CarolF 7/10 3555 days true 1.96 1%
Rachel 9/10 3569 days true 1.93 1%
Claire 7/10 3569 days true 1.93 1%
Denise 8/10 3570 days true 1.93 1%
Denk 8/10 3582 days true 1.91 1%
Klalis 10/10 3584 days true 1.91 1%
Thomas 4/10 3588 days true 1.79 1%
Mike 5/10 3589 days true 1.9 1%
Debbie Mossman 9/10 3595 days 1.58 1%
Johann 10/10 3596 days true 1.89 1%
Carina 10/10 3598 days true 1.89 1%
Mat 8/10 3637 days true 1.82 1%
Anette 7/10 3639 days true 1.82 1%
midlands_missus 8/10 3642 days 1.51 1%
David 7/10 3697 days true 1.72 1%
Suyin 10/10 3718 days true 1.69 1%
Franz 10/10 3891 days true 1.4 1%
Jennifer Baulch 7/10 3896 days true 1.4 1%
George Jeffs 10/10 3899 days true 1.39 1%
Jacob 9/10 3903 days true 1.38 1%
Aharon 10/10 3918 days true 1.36 1%
D.A. Mulder 8/10 3919 days true 1.36 1%
Knol 8/10 3921 days true 1.35 1%
Cole Penelope 8/10 3924 days true 1.35 1%
Jody 7/10 3932 days true 1.34 1%
Anna 5/10 3932 days true 1.34 1%
Pauline Thai 8/10 3939 days true 1.32 1%
Dan Adamson 8/10 3939 days true 1.32 1%
Stephen Brightman 8/10 3948 days true 1.31 1%
Madeleine Rowland 8/10 3948 days true 1.31 1%
Bronwyn Gaby 9/10 3966 days true 1.28 1%
Free_ride 9/10 3982 days 1.05 0%
Michael 9/10 4005 days true 1.22 1%
Raul 10/10 4255 days true 0.81 0%
TeamFlorida 9/10 4257 days true 0.8 0%
TeamFlorida 8/10 4257 days true 0.8 0%
James 9/10 4270 days true 0.78 0%
Rudi 10/10 4274 days true 0.77 0%
Rolf Kruger 10/10 4298 days true 0.73 0%
Brian 10/10 4302 days true 0.73 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

-7.24% 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 362 days. Adjustments are according to the following table.

Days Adjustment
359 -7.18%
360 -7.20%
361 -7.22%
362 -7.24%
363 -7.26%
364 -7.28%
365 -7.30%

Final Ranking Score

78%

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.