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

85.12%

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 9/10 289 days true 104.12 100%
Dan Coates 9/10 522 days true 68.19 65%
Dominik 9/10 522 days true 68.19 65%
Holloway 10/10 545 days true 63.52 61%
Christina 6/10 613 days true 50.18 48%
Barbara Knops 9/10 615 days true 49.81 47%
Manu Liberta 10/10 625 days true 48.01 46%
Bruno 9/10 635 days true 46.24 44%
Kirsty Smith 10/10 658 days true 42.31 40%
Sophia Satter 8/10 669 days true 40.51 38%
Afiya Levy 10/10 890 days true 13.99 13%
Johannes Eisel 6/10 899 days true 13.31 12%
Alexander Mattea 5/10 899 days true 13.31 12%
Timea Bagosi 9/10 901 days 10.96 10%
Riviere 8/10 913 days true 12.3 11%
Dani 8/10 915 days true 12.16 11%
Benoit Leclerc 7/10 917 days true 12.02 11%
Anna Stoehr 10/10 935 days true 10.87 10%
Kai Krchmar 6/10 988 days true 8.18 7%
Kristina Farkas 5/10 1283 days true 5.69 5%
Sophia Kadel 10/10 1313 days true 5.64 5%
Laura and Marie 7/10 1319 days true 5.63 5%
Rachel S 10/10 1326 days 4.68 4%
Joris Giullemot 8/10 1635 days true 5.11 4%
Laura Metz 7/10 1646 days true 5.09 4%
Hubertus Thost 7/10 1646 days true 5.09 4%
Amanda 4/10 1661 days 3.93 3%
S B 10/10 1674 days true 5.05 4%
M K 10/10 1674 days true 5.05 4%
Maya Bakker-deDreu 8/10 1682 days true 5.04 4%
Christin Woelk 9/10 1962 days true 4.57 4%
Maria Klister 7/10 1982 days true 4.54 4%
Lydia Kleinkoenen 9/10 2002 days true 4.51 4%
Jessica Grewe 9/10 2002 days true 4.51 4%
Hannah Lia-Isis Kubillus 9/10 2002 days true 4.51 4%
Jan Zimmerman 8/10 2013 days true 4.49 3%
Margaret and Derek McNeil 10/10 2073 days true 4.39 3%
Frank and Suzanne 8/10 2088 days true 4.37 3%
RollingMoon 8/10 2149 days 3.56 3%
Marcel & Kim Meichtry 7/10 2369 days true 3.91 3%
Howell Davies 5/10 2372 days true 3.9 3%
Baas 7/10 2372 days true 3.9 3%
Pete & Pat Etheridge 8/10 2372 days true 3.9 3%
Siegfried Richter 7/10 2373 days true 3.9 3%
Melanie Mathiak 10/10 2375 days true 3.9 3%
Sig Schrattner 8/10 2375 days true 3.9 3%
Rebecca Doehl 7/10 2376 days true 3.89 3%
Seth & Carla 7/10 2377 days true 3.89 3%
Gabriele Wendt 9/10 2377 days true 3.89 3%
Tadej Ferjan 8/10 2377 days true 3.89 3%
Mary Mitchell 10/10 2377 days true 3.89 3%
Emily Wikston 9/10 2378 days true 3.89 3%
Andreas & Leonie Fehr 10/10 2384 days true 3.88 3%
Horst Langstein 9/10 2385 days true 3.88 3%
Marco Scheiber 9/10 2386 days true 3.88 3%
Friedrich Kaltner 10/10 2388 days true 3.87 3%
Frank & Julia 10/10 2391 days true 3.87 3%
Thyg Lingdal 10/10 2391 days true 3.87 3%
Nicole van Bergen 8/10 2391 days true 3.87 3%
Mike & April Prince 7/10 2405 days true 3.85 3%
Alfred & Henrike 8/10 2417 days true 3.83 3%
Lyn Stainton 6/10 2466 days true 3.75 3%
Ken Talan 10/10 2694 days true 3.37 2%
Jon_and_Family 9/10 2698 days 2.8 2%
Gertz 10/10 2702 days true 3.36 2%
Katarina Bokor 8/10 2706 days true 3.35 2%
Mark Franklin 6/10 2706 days true 3.35 2%
Gordon Agent 10/10 2706 days true 3.35 2%
Maureen Hardy 8/10 2706 days true 3.35 2%
AJ van Pelt 8/10 2706 days true 3.35 2%
Werner and Rita 9/10 2713 days true 3.34 2%
Richard Dudfield 10/10 2715 days true 3.34 2%
Sayaka 7/10 2715 days true 3.34 2%
Urs and Isabella 7/10 2716 days true 3.34 2%
Juliane Kleiu 10/10 2719 days true 3.33 2%
Linda Kremer 9/10 2720 days true 3.33 2%
Rebecca Johnston 9/10 2720 days true 3.33 2%
David Mellard 10/10 2721 days true 3.33 2%
Bruce & Elaine Chote 10/10 2721 days true 3.33 2%
Paul Nickson 8/10 2721 days true 3.33 2%
Monique 8/10 2721 days true 3.33 2%
Beat & Connie 10/10 2723 days true 3.32 2%
Alex Stil 9/10 2723 days true 3.32 2%
Pein van Nosrt 7/10 2728 days true 3.32 2%
Raith 9/10 2728 days true 3.32 2%
Elise van Haastert 8/10 2728 days true 3.32 2%
Claudia 10/10 2730 days true 3.31 2%
Carolin Ranner 6/10 2730 days true 3.31 2%
Winskowsky 9/10 2731 days true 3.31 2%
Hvid 9/10 2745 days true 3.29 2%
Judith K. 6/10 2747 days true 3.28 2%
Ruben and Jetske 7/10 2747 days true 3.28 2%
Roy Seymour 9/10 2748 days true 3.28 2%
Tom Hill 10/10 2752 days true 3.28 2%
Ruua Reyrink 7/10 2753 days true 3.27 2%
Patrick Hugener 9/10 2753 days true 3.27 2%
JohnHaestad 4/10 2757 days 2.53 2%
dollimyxture 10/10 2788 days 2.68 2%
aggiemary04 10/10 2880 days 2.55 2%
victoriauk 4/10 3002 days true 2.7 2%
Baumgarten 8/10 3030 days true 2.82 2%
travelbunnyadventures 8/10 3033 days 2.35 1%
Don & Geraldine 10/10 3069 days true 2.76 2%
Matthias & Ceristiane 8/10 3081 days true 2.74 2%
Hilary and Chris Ayton 9/10 3082 days true 2.73 2%
Lis & Rob Tate 9/10 3084 days true 2.73 2%
ccthornton100 10/10 3094 days 2.26 1%
Bob Kusesia 10/10 3095 days true 2.71 2%
Yssel de Schepper 7/10 3100 days true 2.7 2%
Janny Meerdinnk Veldboow 7/10 3100 days true 2.7 2%
Arie Ascher 9/10 3101 days true 2.7 2%
Wolfgang Engelke 10/10 3103 days true 2.7 2%
Thomas K 9/10 3103 days true 2.7 2%
Loleit 7/10 3115 days true 2.68 2%
Mattias Thorm 9/10 3116 days true 2.68 2%
Vincente Garrido 4/10 3117 days true 2.52 2%
R Gilge 10/10 3118 days true 2.67 2%
Erik Hummelmose 8/10 3118 days true 2.67 2%
Ian E 6/10 3118 days true 2.67 2%
Nadine Schaee 9/10 3119 days true 2.67 2%
Belinda Godhard 2/10 3119 days true 2.41 1%
Uwe Rieper 10/10 3121 days true 2.67 2%
E.M. Prideaux 10/10 3136 days true 2.64 2%
Elizabeth E 8/10 3138 days true 2.64 2%
Stevens Frans 8/10 3139 days true 2.64 2%
Heinrich Hax 9/10 3142 days true 2.64 2%
tanh 7/10 3169 days true 2.59 2%
Stephanie Steiner 8/10 3188 days true 2.56 2%
Julia May 9/10 3195 days true 2.55 2%
X Neils 7/10 3206 days true 2.53 2%
Sarah Smith 5/10 3210 days true 2.52 2%
Anna 6/10 3214 days 2.1 1%
OliverG1 7/10 3416 days true 2.18 1%
Philipp 5/10 3428 days true 2.16 1%
JasminA 5/10 3428 days true 2.16 1%
ChristinaV 8/10 3437 days true 2.15 1%
JuergenSchnitzer 9/10 3444 days true 2.14 1%
AstridVG 7/10 3444 days true 2.14 1%
NatasjaV 7/10 3446 days true 2.14 1%
JimmyK 7/10 3446 days true 2.14 1%
MarcoJ 9/10 3448 days true 2.13 1%
LucyPoland 9/10 3449 days true 2.13 1%
Stolz 7/10 3451 days true 2.13 1%
BrzezinskaM 10/10 3453 days true 2.12 1%
AndreB 10/10 3453 days true 2.12 1%
Linda 7/10 3459 days true 2.11 1%
Susan 8/10 3460 days true 2.11 1%
Byleveld 7/10 3461 days true 2.11 1%
JoseB 8/10 3462 days true 2.11 1%
JetteG 10/10 3462 days true 2.11 1%
CarolF 7/10 3463 days true 2.11 1%
Rachel 9/10 3477 days true 2.08 1%
Claire 7/10 3477 days true 2.08 1%
Denise 8/10 3478 days true 2.08 1%
Denk 8/10 3490 days true 2.06 1%
Klalis 10/10 3492 days true 2.06 1%
Thomas 4/10 3496 days true 1.93 1%
Mike 5/10 3497 days true 2.05 1%
Debbie Mossman 9/10 3503 days 1.7 1%
Johann 10/10 3504 days true 2.04 1%
Carina 10/10 3506 days true 2.04 1%
Mat 8/10 3545 days true 1.97 1%
Anette 7/10 3547 days true 1.97 1%
midlands_missus 8/10 3550 days 1.64 1%
David 7/10 3605 days true 1.87 1%
Suyin 10/10 3625 days true 1.84 1%
Franz 10/10 3799 days true 1.56 1%
Jennifer Baulch 7/10 3804 days true 1.55 1%
George Jeffs 10/10 3807 days true 1.54 1%
Jacob 9/10 3811 days true 1.54 1%
Aharon 10/10 3826 days true 1.51 1%
D.A. Mulder 8/10 3827 days true 1.51 1%
Knol 8/10 3829 days true 1.51 1%
Cole Penelope 8/10 3832 days true 1.5 1%
Jody 7/10 3840 days true 1.49 1%
Anna 5/10 3840 days true 1.49 1%
Pauline Thai 8/10 3847 days true 1.48 1%
Dan Adamson 8/10 3847 days true 1.48 1%
Stephen Brightman 8/10 3856 days true 1.46 1%
Madeleine Rowland 8/10 3856 days true 1.46 1%
Bronwyn Gaby 9/10 3874 days true 1.43 1%
Free_ride 9/10 3890 days 1.17 0%
Michael 9/10 3913 days true 1.37 0%
Raul 10/10 4163 days true 0.96 0%
TeamFlorida 9/10 4165 days true 0.95 0%
TeamFlorida 8/10 4165 days true 0.95 0%
James 9/10 4178 days true 0.93 0%
Rudi 10/10 4182 days true 0.93 0%
Rolf Kruger 10/10 4206 days true 0.89 0%
Brian 10/10 4210 days true 0.88 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

-5.40% 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 270 days. Adjustments are according to the following table.

Days Adjustment
267 -5.34%
268 -5.36%
269 -5.38%
270 -5.40%
271 -5.42%
272 -5.44%
273 -5.46%

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.