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 Raglan Surfing School.

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

Raglan Surfing School

Valid Reviews

24 Valid Reviews

The Raglan Surfing School experience has a total of 24 valid reviews. There are no 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 24 valid reviews:

Rating Count Percentage
10/10 10
42%
9/10 5
21%
8/10 7
29%
7/10 1
4%
6/10 0
0%
5/10 1
4%
4/10 0
0%
3/10 0
0%
2/10 0
0%
1/10 0
0%

88.75% Average

The raw data average (mean) for all the Raglan Surfing School valid reviews is 88.75% and is based on 24 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

20 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 24 valid reviews, the experience has 20 face-to-face reviews collected during interviews by our team.

Below is the distribution of ratings for the 20 face-to-face reviews:

Rating Count Percentage
10/10 8
40%
9/10 4
20%
8/10 7
35%
7/10 0
0%
6/10 0
0%
5/10 1
5%
4/10 0
0%
3/10 0
0%
2/10 0
0%
1/10 0
0%

88.50% Average

The raw data average (mean) for all the Raglan Surfing School face-to-face reviews is 88.50% and is based on 20 face-to-face reviews. This value is not used to calculate the ranking score and it only provided here for comparison purposes.

Weighted Average

90.41%

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
Nadine and Michael 10/10 488 days true 74.72 100%
Yufei Ye 7/10 662 days 34.71 46%
Matthias Hottex 9/10 825 days true 19.86 26%
Emily Noyd 9/10 834 days true 18.95 24%
Jonas Weidner 8/10 863 days true 16.23 21%
Maxim Motheus 9/10 870 days true 15.63 20%
Gabriel Siibers 10/10 875 days true 15.2 19%
Flora Kiessling 8/10 891 days true 13.91 17%
Nils 10/10 897 days true 13.45 17%
Iain & Josephine Harbison 10/10 906 days 10.66 13%
Sonja Idzinga 8/10 1227 days true 5.78 6%
Luca Scheuemeier 10/10 1589 days true 5.19 6%
Sonia Sennane 10/10 2308 days true 4.01 4%
Stephan Wolter 10/10 2321 days true 3.98 4%
Vanessa Hanzen 8/10 2665 days true 3.42 3%
tdes 10/10 2732 days 2.76 2%
Rose Kearsley 8/10 3028 days true 2.82 2%
Thomas Signes 10/10 3093 days true 2.72 2%
Sally477 9/10 3373 days 1.88 1%
MarielR 5/10 3390 days true 2.23 2%
Tobias Rahm 10/10 3777 days true 1.59 1%
Eliase 8/10 3786 days true 1.58 1%
Michael 9/10 4095 days true 1.07 0%
Hilary 8/10 4109 days true 1.05 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 Raglan Surfing School experience has plenty of reviews and does not meet the criteria for any adjustment.

Recent Reviews Adjustment

-7.28% Adjustment

There may be an adjustment if an experience hasn't received any reviews within the last 60 days. However the Raglan Surfing School 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 Raglan Surfing School experience has been adjusted for 364 days. Adjustments are according to the following table.

Days Adjustment
361 -7.22%
362 -7.24%
363 -7.26%
364 -7.28%
365 -7.30%
366 -7.32%
367 -7.34%

Final Ranking Score

83%

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.