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

85.10%

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 9/10 199 days true 112.47 100%
Dan Coates 9/10 432 days true 84.51 75%
Dominik 9/10 432 days true 84.51 75%
Holloway 10/10 455 days true 80.63 71%
Christina 6/10 523 days true 67.99 60%
Barbara Knops 9/10 525 days true 67.59 60%
Manu Liberta 10/10 535 days true 65.57 58%
Bruno 9/10 545 days true 63.52 56%
Kirsty Smith 10/10 568 days true 58.81 52%
Sophia Satter 8/10 579 days true 56.63 50%
Afiya Levy 10/10 800 days true 22.55 19%
Johannes Eisel 6/10 809 days true 21.55 18%
Alexander Mattea 5/10 809 days true 21.55 18%
Timea Bagosi 9/10 812 days 17.69 15%
Riviere 8/10 823 days true 20.07 17%
Dani 8/10 825 days true 19.86 17%
Benoit Leclerc 7/10 827 days true 19.66 17%
Anna Stoehr 10/10 845 days true 17.88 15%
Kai Krchmar 6/10 898 days true 13.38 11%
Kristina Farkas 5/10 1193 days true 5.84 4%
Sophia Kadel 10/10 1223 days true 5.79 4%
Laura and Marie 7/10 1229 days true 5.78 4%
Rachel S 10/10 1237 days 4.81 3%
Joris Giullemot 8/10 1545 days true 5.26 4%
Laura Metz 7/10 1556 days true 5.24 4%
Hubertus Thost 7/10 1556 days true 5.24 4%
Amanda 4/10 1571 days 4.04 3%
S B 10/10 1584 days true 5.2 4%
M K 10/10 1584 days true 5.2 4%
Maya Bakker-deDreu 8/10 1592 days true 5.18 4%
Christin Woelk 9/10 1872 days true 4.72 3%
Maria Klister 7/10 1892 days true 4.69 3%
Lydia Kleinkoenen 9/10 1912 days true 4.66 3%
Jessica Grewe 9/10 1912 days true 4.66 3%
Hannah Lia-Isis Kubillus 9/10 1912 days true 4.66 3%
Jan Zimmerman 8/10 1923 days true 4.64 3%
Margaret and Derek McNeil 10/10 1983 days true 4.54 3%
Frank and Suzanne 8/10 1998 days true 4.52 3%
RollingMoon 8/10 2059 days 3.68 2%
Marcel & Kim Meichtry 7/10 2279 days true 4.05 3%
Howell Davies 5/10 2282 days true 4.05 3%
Baas 7/10 2282 days true 4.05 3%
Pete & Pat Etheridge 8/10 2282 days true 4.05 3%
Siegfried Richter 7/10 2283 days true 4.05 3%
Melanie Mathiak 10/10 2285 days true 4.04 3%
Sig Schrattner 8/10 2285 days true 4.04 3%
Rebecca Doehl 7/10 2286 days true 4.04 3%
Seth & Carla 7/10 2287 days true 4.04 3%
Gabriele Wendt 9/10 2287 days true 4.04 3%
Tadej Ferjan 8/10 2287 days true 4.04 3%
Mary Mitchell 10/10 2287 days true 4.04 3%
Emily Wikston 9/10 2288 days true 4.04 3%
Andreas & Leonie Fehr 10/10 2294 days true 4.03 3%
Horst Langstein 9/10 2295 days true 4.03 3%
Marco Scheiber 9/10 2296 days true 4.03 3%
Friedrich Kaltner 10/10 2298 days true 4.02 3%
Frank & Julia 10/10 2301 days true 4.02 3%
Thyg Lingdal 10/10 2301 days true 4.02 3%
Nicole van Bergen 8/10 2301 days true 4.02 3%
Mike & April Prince 7/10 2315 days true 3.99 3%
Alfred & Henrike 8/10 2327 days true 3.97 3%
Lyn Stainton 6/10 2376 days true 3.89 3%
Ken Talan 10/10 2604 days true 3.52 2%
Jon_and_Family 9/10 2608 days 2.93 2%
Gertz 10/10 2612 days true 3.51 2%
Katarina Bokor 8/10 2616 days true 3.5 2%
Mark Franklin 6/10 2616 days true 3.5 2%
Gordon Agent 10/10 2616 days true 3.5 2%
Maureen Hardy 8/10 2616 days true 3.5 2%
AJ van Pelt 8/10 2616 days true 3.5 2%
Werner and Rita 9/10 2623 days true 3.49 2%
Richard Dudfield 10/10 2625 days true 3.48 2%
Sayaka 7/10 2625 days true 3.48 2%
Urs and Isabella 7/10 2626 days true 3.48 2%
Juliane Kleiu 10/10 2629 days true 3.48 2%
Linda Kremer 9/10 2630 days true 3.48 2%
Rebecca Johnston 9/10 2630 days true 3.48 2%
David Mellard 10/10 2631 days true 3.48 2%
Bruce & Elaine Chote 10/10 2631 days true 3.48 2%
Paul Nickson 8/10 2631 days true 3.48 2%
Monique 8/10 2631 days true 3.48 2%
Beat & Connie 10/10 2633 days true 3.47 2%
Alex Stil 9/10 2633 days true 3.47 2%
Pein van Nosrt 7/10 2638 days true 3.46 2%
Raith 9/10 2638 days true 3.46 2%
Elise van Haastert 8/10 2638 days true 3.46 2%
Claudia 10/10 2640 days true 3.46 2%
Carolin Ranner 6/10 2640 days true 3.46 2%
Winskowsky 9/10 2641 days true 3.46 2%
Hvid 9/10 2655 days true 3.44 2%
Judith K. 6/10 2657 days true 3.43 2%
Ruben and Jetske 7/10 2657 days true 3.43 2%
Roy Seymour 9/10 2658 days true 3.43 2%
Tom Hill 10/10 2662 days true 3.42 2%
Ruua Reyrink 7/10 2663 days true 3.42 2%
Patrick Hugener 9/10 2663 days true 3.42 2%
JohnHaestad 4/10 2667 days 2.65 1%
dollimyxture 10/10 2698 days 2.8 2%
aggiemary04 10/10 2790 days 2.68 1%
victoriauk 4/10 2912 days true 2.84 2%
Baumgarten 8/10 2940 days true 2.97 2%
travelbunnyadventures 8/10 2943 days 2.47 1%
Don & Geraldine 10/10 2979 days true 2.9 2%
Matthias & Ceristiane 8/10 2991 days true 2.88 2%
Hilary and Chris Ayton 9/10 2992 days true 2.88 2%
Lis & Rob Tate 9/10 2994 days true 2.88 2%
ccthornton100 10/10 3004 days 2.38 1%
Bob Kusesia 10/10 3005 days true 2.86 2%
Yssel de Schepper 7/10 3010 days true 2.85 2%
Janny Meerdinnk Veldboow 7/10 3010 days true 2.85 2%
Arie Ascher 9/10 3011 days true 2.85 2%
Wolfgang Engelke 10/10 3013 days true 2.85 2%
Thomas K 9/10 3013 days true 2.85 2%
Loleit 7/10 3025 days true 2.83 2%
Mattias Thorm 9/10 3026 days true 2.83 2%
Vincente Garrido 4/10 3027 days true 2.66 1%
R Gilge 10/10 3028 days true 2.82 2%
Erik Hummelmose 8/10 3028 days true 2.82 2%
Ian E 6/10 3028 days true 2.82 2%
Nadine Schaee 9/10 3029 days true 2.82 2%
Belinda Godhard 2/10 3029 days true 2.54 1%
Uwe Rieper 10/10 3031 days true 2.82 2%
E.M. Prideaux 10/10 3046 days true 2.79 2%
Elizabeth E 8/10 3048 days true 2.79 2%
Stevens Frans 8/10 3049 days true 2.79 2%
Heinrich Hax 9/10 3052 days true 2.78 2%
tanh 7/10 3079 days true 2.74 2%
Stephanie Steiner 8/10 3098 days true 2.71 2%
Julia May 9/10 3105 days true 2.7 1%
X Neils 7/10 3116 days true 2.68 1%
Sarah Smith 5/10 3120 days true 2.67 1%
Anna 6/10 3124 days 2.22 1%
OliverG1 7/10 3326 days true 2.33 1%
Philipp 5/10 3338 days true 2.31 1%
JasminA 5/10 3338 days true 2.31 1%
ChristinaV 8/10 3348 days true 2.3 1%
JuergenSchnitzer 9/10 3354 days true 2.29 1%
AstridVG 7/10 3355 days true 2.28 1%
NatasjaV 7/10 3356 days true 2.28 1%
JimmyK 7/10 3356 days true 2.28 1%
MarcoJ 9/10 3358 days true 2.28 1%
LucyPoland 9/10 3359 days true 2.28 1%
Stolz 7/10 3362 days true 2.27 1%
BrzezinskaM 10/10 3363 days true 2.27 1%
AndreB 10/10 3363 days true 2.27 1%
Linda 7/10 3370 days true 2.26 1%
Susan 8/10 3371 days true 2.26 1%
Byleveld 7/10 3371 days true 2.26 1%
JoseB 8/10 3372 days true 2.26 1%
JetteG 10/10 3372 days true 2.26 1%
CarolF 7/10 3373 days true 2.26 1%
Rachel 9/10 3388 days true 2.23 1%
Claire 7/10 3388 days true 2.23 1%
Denise 8/10 3389 days true 2.23 1%
Denk 8/10 3401 days true 2.21 1%
Klalis 10/10 3403 days true 2.21 1%
Thomas 4/10 3407 days true 2.07 1%
Mike 5/10 3408 days true 2.2 1%
Debbie Mossman 9/10 3413 days 1.82 1%
Johann 10/10 3415 days true 2.19 1%
Carina 10/10 3417 days true 2.18 1%
Mat 8/10 3456 days true 2.12 1%
Anette 7/10 3458 days true 2.12 1%
midlands_missus 8/10 3460 days 1.76 1%
David 7/10 3516 days true 2.02 1%
Suyin 10/10 3536 days true 1.99 1%
Franz 10/10 3709 days true 1.7 1%
Jennifer Baulch 7/10 3714 days true 1.69 1%
George Jeffs 10/10 3717 days true 1.69 1%
Jacob 9/10 3721 days true 1.68 1%
Aharon 10/10 3736 days true 1.66 1%
D.A. Mulder 8/10 3737 days true 1.66 1%
Knol 8/10 3739 days true 1.65 1%
Cole Penelope 8/10 3742 days true 1.65 1%
Jody 7/10 3750 days true 1.64 1%
Anna 5/10 3750 days true 1.64 1%
Pauline Thai 8/10 3757 days true 1.62 1%
Dan Adamson 8/10 3757 days true 1.62 1%
Stephen Brightman 8/10 3766 days true 1.61 1%
Madeleine Rowland 8/10 3766 days true 1.61 1%
Bronwyn Gaby 9/10 3784 days true 1.58 0%
Free_ride 9/10 3800 days 1.29 0%
Michael 9/10 3823 days true 1.52 0%
Raul 10/10 4073 days true 1.1 0%
TeamFlorida 9/10 4075 days true 1.1 0%
TeamFlorida 8/10 4075 days true 1.1 0%
James 9/10 4088 days true 1.08 0%
Rudi 10/10 4092 days true 1.07 0%
Rolf Kruger 10/10 4116 days true 1.03 0%
Brian 10/10 4120 days true 1.03 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

-3.62% 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 181 days. Adjustments are according to the following table.

Days Adjustment
178 -3.56%
179 -3.58%
180 -3.60%
181 -3.62%
182 -3.64%
183 -3.66%
184 -3.68%

Final Ranking Score

82%

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.