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 The Antarctic Attraction.

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

The Antarctic Attraction

Valid Reviews

67 Valid Reviews

The The Antarctic Attraction experience has a total of 69 reviews. There are 67 valid reviews that are included when calculating the ranking score and 2 invalid reviews 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 67 valid reviews:

Rating Count Percentage
10/10 8
12%
9/10 10
15%
8/10 17
25%
7/10 10
15%
6/10 4
6%
5/10 8
12%
4/10 2
3%
3/10 3
4%
2/10 3
4%
1/10 2
3%

69.40% Average

The raw data average (mean) for all the The Antarctic Attraction valid reviews is 69.40% and is based on 67 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

47 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 67 valid reviews, the experience has 47 face-to-face reviews collected during interviews by our team.

Below is the distribution of ratings for the 47 face-to-face reviews:

Rating Count Percentage
10/10 3
6%
9/10 9
19%
8/10 14
30%
7/10 8
17%
6/10 3
6%
5/10 5
11%
4/10 2
4%
3/10 3
6%
2/10 0
0%
1/10 0
0%

72.13% Average

The raw data average (mean) for all the The Antarctic Attraction face-to-face reviews is 72.13% and is based on 47 face-to-face reviews. This value is not used to calculate the ranking score and it only provided here for comparison purposes.

Weighted Average

79.20%

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
Lars Grosse 8/10 908 days true 10.01 100%
Per Bang 8/10 941 days true 8.32 83%
Bernd Giermann 8/10 985 days true 6.57 66%
Dubrulle 9/10 1013 days true 6.07 61%
Mary Tan 10/10 1055 days 5.25 52%
Gavin Moffatt 9/10 1276 days true 4.69 47%
Lars Schuett 10/10 1342 days true 4.58 46%
Matt Lohmeyer 8/10 1360 days 4.32 43%
Thomas Stuber 7/10 1381 days true 4.1 41%
Angela Neville 5/10 2067 days true 2.7 27%
Neil Beckett 5/10 2365 days 2.29 23%
Paul Kelly 5/10 2577 days 1.99 20%
peterpiper 10/10 2700 days 2.25 22%
Kimothy 8/10 2730 days 2.09 21%
Delore 4/10 2754 days true 1.71 17%
Lorna Williams 7/10 2756 days true 1.96 20%
David & Sue Lokkerbol 7/10 2776 days true 1.93 19%
Thyg Lingdal 9/10 2789 days true 2.1 21%
Jerryusa57 10/10 2790 days 2.1 21%
pauls1892 10/10 2790 days 2.1 21%
qofd 6/10 3066 days 1.35 13%
Jeff Cerjan 8/10 3134 days true 1.43 14%
Andrew Hammond 7/10 3278 days 1.15 11%
Lloyd Shephard 8/10 3482 days true 0.87 9%
Arnold 8/10 3483 days true 0.87 9%
hughesW 8/10 3492 days true 0.85 8%
Chance McGuire 10/10 3520 days 0.85 8%
Peter Ortner 8/10 3529 days true 0.79 8%
Buss 7/10 3533 days true 0.75 7%
Chung Family 6/10 3540 days true 0.68 7%
middendorp 5/10 3566 days true 0.62 6%
alasiac 8/10 3582 days true 0.7 7%
Deede K 9/10 3590 days true 0.73 7%
Bruce_M 1/10 3673 days 0.43 4%
andriesk 5/10 3708 days true 0.43 4%
joevw 3/10 3781 days true 0.31 3%
Johnnie 8/10 3807 days true 0.34 3%
pattie 1/10 3826 days 0.24 2%
MarkP 8/10 3826 days true 0.31 3%
Sally477 7/10 3827 days 0.29 3%
VenesJ 7/10 3846 days true 0.26 3%
Jan 6/10 3857 days true 0.22 2%
CharlotteC 8/10 3861 days true 0.25 3%
kate Smith 2/10 3877 days 0.18 2%
Rory 4/10 3888 days true 0.17 2%
Jan 7/10 3891 days true 0.19 2%
max deloare 2/10 3900 days 0.15 1%
Debbie Mossman 5/10 3901 days 0.16 2%
stueug 9/10 3976 days 0.07 1%
Ken 10/10 3993 days true 0.04 0%
Sam Prior 3/10 4042 days true 0.0 0%
Mark Coffey 2/10 4069 days 0.0 0%
fgregory 8/10 4089 days 0.0 0%
Lorraine Wallis 9/10 4192 days true 0.0 0%
Chrysa Charitou 9/10 4192 days true 0.0 0%
Teresa Wallis 9/10 4192 days true 0.0 0%
Nicole 8/10 4209 days true 0.0 0%
Orla Hansen 10/10 4218 days true 0.0 0%
Paul McDonell 8/10 4218 days true 0.0 0%
Rebekah Holbrook 9/10 4254 days true 0.0 0%
Simon Chettleburgh 7/10 4254 days true 0.0 0%
Aske Helbor 3/10 4269 days true 0.0 0%
ranker_734 5/10 4269 days true 0.0 0%
Rene Schotvanger 7/10 4428 days true 0.0 0%
Andy 6/10 4598 days true 0.0 0%
Sandra 5/10 4598 days true 0.0 0%
Dave 9/10 4603 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 The Antarctic Attraction experience has plenty of reviews and does not meet the criteria for any adjustment.

Recent Reviews Adjustment

-3.98% Adjustment

There may be an adjustment if an experience hasn't received any reviews within the last 60 days. However the The Antarctic Attraction 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 199 days.

The The Antarctic Attraction experience has been adjusted for 199 days. Adjustments are according to the following table.

Days Adjustment
196 -3.92%
197 -3.94%
198 -3.96%
199 -3.98%
200 -4.00%
201 -4.02%
202 -4.04%

Final Ranking Score

75%

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.