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

83.77%

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 1119 days true 4.95 100%
Dan Coates 9/10 1352 days true 4.5 91%
Dominik 9/10 1352 days true 4.5 91%
Holloway 10/10 1375 days true 4.45 90%
Christina 6/10 1443 days true 3.58 72%
Barbara Knops 9/10 1445 days true 4.32 87%
Manu Liberta 10/10 1455 days true 4.3 87%
Bruno 9/10 1465 days true 4.28 86%
Kirsty Smith 10/10 1488 days true 4.23 85%
Sophia Satter 8/10 1499 days true 4.0 81%
Afiya Levy 10/10 1720 days true 3.78 76%
Johannes Eisel 6/10 1729 days true 3.12 63%
Alexander Mattea 5/10 1729 days true 3.05 61%
Timea Bagosi 9/10 1731 days 3.76 76%
Riviere 8/10 1743 days true 3.55 72%
Dani 8/10 1745 days true 3.54 72%
Benoit Leclerc 7/10 1747 days true 3.39 68%
Anna Stoehr 10/10 1765 days true 3.69 74%
Kai Krchmar 6/10 1818 days true 2.98 60%
Kristina Farkas 5/10 2113 days true 2.44 49%
Sophia Kadel 10/10 2143 days true 2.95 60%
Laura and Marie 7/10 2149 days true 2.67 54%
Rachel S 10/10 2156 days 2.92 59%
Joris Giullemot 8/10 2465 days true 2.2 44%
Laura Metz 7/10 2476 days true 2.09 42%
Hubertus Thost 7/10 2476 days true 2.09 42%
Amanda 4/10 2491 days 1.79 36%
S B 10/10 2504 days true 2.24 45%
M K 10/10 2504 days true 2.24 45%
Maya Bakker-deDreu 8/10 2512 days true 2.12 43%
Christin Woelk 9/10 2792 days true 1.68 34%
Maria Klister 7/10 2812 days true 1.49 30%
Lydia Kleinkoenen 9/10 2832 days true 1.6 32%
Jessica Grewe 9/10 2832 days true 1.6 32%
Hannah Lia-Isis Kubillus 9/10 2832 days true 1.6 32%
Jan Zimmerman 8/10 2843 days true 1.5 30%
Margaret and Derek McNeil 10/10 2903 days true 1.46 30%
Frank and Suzanne 8/10 2918 days true 1.36 27%
RollingMoon 8/10 2979 days 1.25 25%
Marcel & Kim Meichtry 7/10 3199 days true 0.8 16%
Howell Davies 5/10 3202 days true 0.71 14%
Baas 7/10 3202 days true 0.8 16%
Pete & Pat Etheridge 8/10 3202 days true 0.83 17%
Siegfried Richter 7/10 3203 days true 0.8 16%
Melanie Mathiak 10/10 3205 days true 0.87 18%
Sig Schrattner 8/10 3205 days true 0.83 17%
Rebecca Doehl 7/10 3206 days true 0.79 16%
Seth & Carla 7/10 3207 days true 0.79 16%
Gabriele Wendt 9/10 3207 days true 0.87 18%
Tadej Ferjan 8/10 3207 days true 0.82 17%
Mary Mitchell 10/10 3207 days true 0.87 18%
Emily Wikston 9/10 3208 days true 0.86 17%
Andreas & Leonie Fehr 10/10 3214 days true 0.85 17%
Horst Langstein 9/10 3215 days true 0.85 17%
Marco Scheiber 9/10 3216 days true 0.85 17%
Friedrich Kaltner 10/10 3218 days true 0.85 17%
Frank & Julia 10/10 3221 days true 0.84 17%
Thyg Lingdal 10/10 3221 days true 0.84 17%
Nicole van Bergen 8/10 3221 days true 0.8 16%
Mike & April Prince 7/10 3235 days true 0.74 15%
Alfred & Henrike 8/10 3247 days true 0.75 15%
Lyn Stainton 6/10 3296 days true 0.57 12%
Ken Talan 10/10 3524 days true 0.25 5%
Jon_and_Family 9/10 3528 days 0.24 5%
Gertz 10/10 3532 days true 0.23 5%
Katarina Bokor 8/10 3536 days true 0.21 4%
Mark Franklin 6/10 3536 days true 0.19 4%
Gordon Agent 10/10 3536 days true 0.22 5%
Maureen Hardy 8/10 3536 days true 0.21 4%
AJ van Pelt 8/10 3536 days true 0.21 4%
Werner and Rita 9/10 3543 days true 0.21 4%
Richard Dudfield 10/10 3545 days true 0.21 4%
Sayaka 7/10 3545 days true 0.19 4%
Urs and Isabella 7/10 3546 days true 0.19 4%
Juliane Kleiu 10/10 3549 days true 0.2 4%
Linda Kremer 9/10 3550 days true 0.2 4%
Rebecca Johnston 9/10 3550 days true 0.2 4%
David Mellard 10/10 3551 days true 0.19 4%
Bruce & Elaine Chote 10/10 3551 days true 0.19 4%
Paul Nickson 8/10 3551 days true 0.18 4%
Monique 8/10 3551 days true 0.18 4%
Beat & Connie 10/10 3553 days true 0.19 4%
Alex Stil 9/10 3553 days true 0.19 4%
Pein van Nosrt 7/10 3558 days true 0.16 3%
Raith 9/10 3558 days true 0.18 4%
Elise van Haastert 8/10 3558 days true 0.17 3%
Claudia 10/10 3560 days true 0.18 4%
Carolin Ranner 6/10 3560 days true 0.15 3%
Winskowsky 9/10 3561 days true 0.17 4%
Hvid 9/10 3575 days true 0.15 3%
Judith K. 6/10 3577 days true 0.12 2%
Ruben and Jetske 7/10 3577 days true 0.13 3%
Roy Seymour 9/10 3578 days true 0.14 3%
Tom Hill 10/10 3582 days true 0.13 3%
Ruua Reyrink 7/10 3583 days true 0.12 2%
Patrick Hugener 9/10 3583 days true 0.13 3%
JohnHaestad 4/10 3587 days 0.1 2%
dollimyxture 10/10 3618 days 0.06 1%
aggiemary04 10/10 3710 days 0.0 0%
victoriauk 4/10 3832 days true 0.0 0%
Baumgarten 8/10 3860 days true 0.0 0%
travelbunnyadventures 8/10 3863 days 0.0 0%
Don & Geraldine 10/10 3899 days true 0.0 0%
Matthias & Ceristiane 8/10 3911 days true 0.0 0%
Hilary and Chris Ayton 9/10 3912 days true 0.0 0%
Lis & Rob Tate 9/10 3914 days true 0.0 0%
ccthornton100 10/10 3924 days 0.0 0%
Bob Kusesia 10/10 3925 days true 0.0 0%
Yssel de Schepper 7/10 3930 days true 0.0 0%
Janny Meerdinnk Veldboow 7/10 3930 days true 0.0 0%
Arie Ascher 9/10 3931 days true 0.0 0%
Wolfgang Engelke 10/10 3933 days true 0.0 0%
Thomas K 9/10 3933 days true 0.0 0%
Loleit 7/10 3945 days true 0.0 0%
Mattias Thorm 9/10 3946 days true 0.0 0%
Vincente Garrido 4/10 3947 days true 0.0 0%
R Gilge 10/10 3948 days true 0.0 0%
Erik Hummelmose 8/10 3948 days true 0.0 0%
Ian E 6/10 3948 days true 0.0 0%
Nadine Schaee 9/10 3949 days true 0.0 0%
Belinda Godhard 2/10 3949 days true 0.0 0%
Uwe Rieper 10/10 3951 days true 0.0 0%
E.M. Prideaux 10/10 3966 days true 0.0 0%
Elizabeth E 8/10 3968 days true 0.0 0%
Stevens Frans 8/10 3969 days true 0.0 0%
Heinrich Hax 9/10 3972 days true 0.0 0%
tanh 7/10 3999 days true 0.0 0%
Stephanie Steiner 8/10 4018 days true 0.0 0%
Julia May 9/10 4025 days true 0.0 0%
X Neils 7/10 4036 days true 0.0 0%
Sarah Smith 5/10 4040 days true 0.0 0%
Anna 6/10 4044 days 0.0 0%
OliverG1 7/10 4246 days true 0.0 0%
Philipp 5/10 4258 days true 0.0 0%
JasminA 5/10 4258 days true 0.0 0%
ChristinaV 8/10 4267 days true 0.0 0%
JuergenSchnitzer 9/10 4274 days true 0.0 0%
AstridVG 7/10 4274 days true 0.0 0%
NatasjaV 7/10 4276 days true 0.0 0%
JimmyK 7/10 4276 days true 0.0 0%
MarcoJ 9/10 4278 days true 0.0 0%
LucyPoland 9/10 4279 days true 0.0 0%
Stolz 7/10 4281 days true 0.0 0%
BrzezinskaM 10/10 4283 days true 0.0 0%
AndreB 10/10 4283 days true 0.0 0%
Linda 7/10 4289 days true 0.0 0%
Susan 8/10 4290 days true 0.0 0%
Byleveld 7/10 4291 days true 0.0 0%
JoseB 8/10 4292 days true 0.0 0%
JetteG 10/10 4292 days true 0.0 0%
CarolF 7/10 4293 days true 0.0 0%
Rachel 9/10 4307 days true 0.0 0%
Claire 7/10 4307 days true 0.0 0%
Denise 8/10 4308 days true 0.0 0%
Denk 8/10 4320 days true 0.0 0%
Klalis 10/10 4322 days true 0.0 0%
Thomas 4/10 4326 days true 0.0 0%
Mike 5/10 4327 days true 0.0 0%
Debbie Mossman 9/10 4333 days 0.0 0%
Johann 10/10 4334 days true 0.0 0%
Carina 10/10 4336 days true 0.0 0%
Mat 8/10 4375 days true 0.0 0%
Anette 7/10 4377 days true 0.0 0%
midlands_missus 8/10 4380 days 0.0 0%
David 7/10 4435 days true 0.0 0%
Suyin 10/10 4455 days true 0.0 0%
Franz 10/10 4629 days true 0.0 0%
Jennifer Baulch 7/10 4634 days true 0.0 0%
George Jeffs 10/10 4637 days true 0.0 0%
Jacob 9/10 4641 days true 0.0 0%
Aharon 10/10 4656 days true 0.0 0%
D.A. Mulder 8/10 4657 days true 0.0 0%
Knol 8/10 4659 days true 0.0 0%
Cole Penelope 8/10 4662 days true 0.0 0%
Jody 7/10 4670 days true 0.0 0%
Anna 5/10 4670 days true 0.0 0%
Pauline Thai 8/10 4677 days true 0.0 0%
Dan Adamson 8/10 4677 days true 0.0 0%
Stephen Brightman 8/10 4686 days true 0.0 0%
Madeleine Rowland 8/10 4686 days true 0.0 0%
Bronwyn Gaby 9/10 4704 days true 0.0 0%
Free_ride 9/10 4720 days 0.0 0%
Michael 9/10 4743 days true 0.0 0%
Raul 10/10 4993 days true 0.0 0%
TeamFlorida 9/10 4995 days true 0.0 0%
TeamFlorida 8/10 4995 days true 0.0 0%
James 9/10 5008 days true 0.0 0%
Rudi 10/10 5012 days true 0.0 0%
Rolf Kruger 10/10 5036 days true 0.0 0%
Brian 10/10 5040 days true 0.0 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

-4.07% Adjustment

There may be an adjustment if this experience hasn't received any reviews within the last 43 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 200 days. Due to the seasonal nature of many businesses, this adjustment is applied dynamically throughout the year.

The Te Anau Glowworm Caves experience has been adjusted for 200 days. Adjustments are according to the following table.

Days Adjustment
197 -4.01%
198 -4.03%
199 -4.05%
200 -4.07%
201 -4.09%
202 -4.11%
203 -4.13%

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.