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

81.58%

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 1167 days true 4.62 99%
Per Bang 8/10 1200 days true 4.55 98%
Bernd Giermann 8/10 1244 days true 4.47 96%
Dubrulle 9/10 1272 days true 4.65 100%
Mary Tan 10/10 1314 days 4.57 98%
Gavin Moffatt 9/10 1535 days true 4.14 89%
Lars Schuett 10/10 1601 days true 4.01 86%
Matt Lohmeyer 8/10 1619 days 3.78 81%
Thomas Stuber 7/10 1640 days true 3.58 77%
Angela Neville 5/10 2326 days true 2.1 45%
Neil Beckett 5/10 2624 days 1.63 35%
Paul Kelly 5/10 2836 days 1.29 28%
peterpiper 10/10 2959 days 1.35 29%
Kimothy 8/10 2989 days 1.23 26%
Delore 4/10 3013 days true 0.98 21%
Lorna Williams 7/10 3015 days true 1.13 24%
David & Sue Lokkerbol 7/10 3035 days true 1.1 24%
Thyg Lingdal 9/10 3048 days true 1.18 25%
Jerryusa57 10/10 3049 days 1.18 25%
pauls1892 10/10 3049 days 1.18 25%
qofd 6/10 3325 days 0.53 11%
Jeff Cerjan 8/10 3393 days true 0.48 10%
Andrew Hammond 7/10 3537 days 0.2 4%
Lloyd Shephard 8/10 3741 days true 0.0 0%
Arnold 8/10 3742 days true 0.0 0%
hughesW 8/10 3751 days true 0.0 0%
Chance McGuire 10/10 3779 days 0.0 0%
Peter Ortner 8/10 3788 days true 0.0 0%
Buss 7/10 3792 days true 0.0 0%
Chung Family 6/10 3799 days true 0.0 0%
middendorp 5/10 3825 days true 0.0 0%
alasiac 8/10 3841 days true 0.0 0%
Deede K 9/10 3849 days true 0.0 0%
Bruce_M 1/10 3932 days 0.0 0%
andriesk 5/10 3967 days true 0.0 0%
joevw 3/10 4040 days true 0.0 0%
Johnnie 8/10 4066 days true 0.0 0%
pattie 1/10 4085 days 0.0 0%
MarkP 8/10 4085 days true 0.0 0%
Sally477 7/10 4086 days 0.0 0%
VenesJ 7/10 4105 days true 0.0 0%
Jan 6/10 4116 days true 0.0 0%
CharlotteC 8/10 4120 days true 0.0 0%
kate Smith 2/10 4136 days 0.0 0%
Rory 4/10 4147 days true 0.0 0%
Jan 7/10 4150 days true 0.0 0%
max deloare 2/10 4159 days 0.0 0%
Debbie Mossman 5/10 4160 days 0.0 0%
stueug 9/10 4235 days 0.0 0%
Ken 10/10 4252 days true 0.0 0%
Sam Prior 3/10 4301 days true 0.0 0%
Mark Coffey 2/10 4328 days 0.0 0%
fgregory 8/10 4348 days 0.0 0%
Lorraine Wallis 9/10 4451 days true 0.0 0%
Chrysa Charitou 9/10 4451 days true 0.0 0%
Teresa Wallis 9/10 4451 days true 0.0 0%
Nicole 8/10 4468 days true 0.0 0%
Orla Hansen 10/10 4477 days true 0.0 0%
Paul McDonell 8/10 4477 days true 0.0 0%
Rebekah Holbrook 9/10 4513 days true 0.0 0%
Simon Chettleburgh 7/10 4513 days true 0.0 0%
Aske Helbor 3/10 4528 days true 0.0 0%
ranker_734 5/10 4528 days true 0.0 0%
Rene Schotvanger 7/10 4687 days true 0.0 0%
Andy 6/10 4857 days true 0.0 0%
Sandra 5/10 4857 days true 0.0 0%
Dave 9/10 4862 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

-2.33% Adjustment

There may be an adjustment if this experience hasn't received any reviews within the last 111 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 200 days. Due to the seasonal nature of many businesses, this adjustment is applied dynamically throughout the year.

The The Antarctic Attraction experience has been adjusted for 200 days. Adjustments are according to the following table.

Days Adjustment
197 -2.29%
198 -2.30%
199 -2.32%
200 -2.33%
201 -2.34%
202 -2.35%
203 -2.36%

Final Ranking Score

79%

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.