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 Swim with the Dolphins.

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

Swim with the Dolphins

Valid Reviews

91 Valid Reviews

The Swim with the Dolphins experience has a total of 93 reviews. There are 91 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 91 valid reviews:

Rating Count Percentage
10/10 15
16%
9/10 26
29%
8/10 25
27%
7/10 12
13%
6/10 4
4%
5/10 2
2%
4/10 4
4%
3/10 3
3%
2/10 0
0%
1/10 0
0%

79.89% Average

The raw data average (mean) for all the Swim with the Dolphins valid reviews is 79.89% and is based on 91 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

80 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 91 valid reviews, the experience has 80 face-to-face reviews collected during interviews by our team.

Below is the distribution of ratings for the 80 face-to-face reviews:

Rating Count Percentage
10/10 12
15%
9/10 25
31%
8/10 24
30%
7/10 10
13%
6/10 3
4%
5/10 1
1%
4/10 4
5%
3/10 1
1%
2/10 0
0%
1/10 0
0%

81.13% Average

The raw data average (mean) for all the Swim with the Dolphins face-to-face reviews is 81.13% and is based on 80 face-to-face reviews. This value is not used to calculate the ranking score and it only provided here for comparison purposes.

Weighted Average

79.79%

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 Relative Weight
Nadja Guiliani 4/10 2139 days 84%
Ben Blackwell 8/10 2153 days 100%
mathieu boustie 5/10 2250 days 80%
Mattias 7/10 2861 days 50%
Arnaud Memay 7/10 2942 days 45%
Susser 8/10 2942 days 47%
Samuel Fritscher 9/10 3250 days 28%
Fabian and Teresa 10/10 3276 days 26%
Joroen Borkert 7/10 3332 days 20%
Faassen 8/10 3353 days 19%
Ben Simons 9/10 3616 days 2%
Martin Beuker 4/10 3626 days 1%
Romla 8/10 3627 days 1%
Marie Dutron 8/10 3630 days 1%
Preben vil Helmsen 10/10 3632 days 1%
Rick & Suus 8/10 3633 days 0%
Nora 9/10 3633 days 0%
Barry Baily 9/10 3633 days 0%
Christiane & Dirk 8/10 3634 days 0%
Scott Simpson 5/10 3637 days 0%
Wolfgang Beute 8/10 3637 days 0%
batzi 3/10 3741 days 27%
bow 3/10 3894 days 27%
Nick van de Belt 9/10 3963 days 35%
Patrick Gloede 9/10 3969 days 35%
Stoop 9/10 3972 days 35%
Siegfried Tuiel 10/10 3975 days 35%
Laura Leigh 6/10 3979 days 29%
John Taylor 7/10 3985 days 32%
Jon_and_Family 7/10 3986 days 32%
Marjan Van Den Braak 4/10 3987 days 28%
Wouter Teensma 8/10 3990 days 34%
Ann Parry 10/10 3990 days 35%
Rob 8/10 4001 days 34%
Alan & Gill Geach 7/10 4008 days 32%
Sarah Ewing 9/10 4011 days 35%
John N 8/10 4345 days 34%
Elisabeth Egerup 10/10 4358 days 35%
Wielink 8/10 4359 days 34%
Pierre Pilon 9/10 4359 days 35%
Pascal Auber 8/10 4365 days 34%
Lamb 9/10 4378 days 35%
Tonny 8/10 4378 days 34%
Dawn Campbell 10/10 4410 days 35%
guichard 7/10 4430 days 32%
HairyHaggis 10/10 4441 days 35%
katepat 10/10 4441 days 35%
Colin S 10/10 4449 days 35%
Ulyate 6/10 4452 days 29%
Alex D'Souza 7/10 4502 days 32%
Patrick 9/10 4532 days 35%
billdee 10/10 4563 days 35%
EvertG 8/10 4666 days 34%
KatrinK 10/10 4678 days 35%
David 8/10 4685 days 34%
neeltjec 9/10 4685 days 35%
monikav 10/10 4685 days 35%
Martien van Brakel 9/10 4685 days 35%
kymberlyw 9/10 4686 days 35%
Katy1 8/10 4687 days 34%
Anneleen 8/10 4716 days 34%
RosC 6/10 4720 days 29%
Simon 9/10 4734 days 35%
Gunhild 9/10 4749 days 35%
Lars 10/10 4752 days 35%
Miha 7/10 4790 days 32%
Ana 7/10 4798 days 32%
Cindy 9/10 4798 days 35%
Mark 9/10 4816 days 35%
Stephanie Schikora 10/10 4828 days 35%
Rhys Howell 6/10 5019 days 29%
Ben 9/10 5056 days 35%
Vikki 10/10 5061 days 35%
Kelly Noirin 8/10 5072 days 34%
Ohad 9/10 5078 days 35%
Trinkler 9/10 5078 days 35%
Nancy Dol 9/10 5082 days 35%
George Clark 7/10 5082 days 32%
Kathy Hawey 8/10 5084 days 34%
Myrtille de Vries 9/10 5089 days 35%
Buys 9/10 5090 days 35%
Haemnerli 8/10 5090 days 34%
Vaclaf 9/10 5096 days 35%
Jenny Hulsebosch 9/10 5113 days 35%
Willemien 8/10 5177 days 34%
Vern 7/10 5287 days 32%
James 8/10 5287 days 34%
Rietveld 8/10 5443 days 34%
Janne 8/10 5455 days 34%
Nina 3/10 5457 days 27%
Inga 4/10 5457 days 28%

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 Swim with the Dolphins experience has plenty of reviews and does not meet the criteria for any adjustment.

Recent Reviews Adjustment

-4.13% Adjustment

There may be an adjustment if this experience hasn't received any reviews within the last 49 days. However the Swim with the Dolphins 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 Swim with the Dolphins experience has been adjusted for 200 days. Adjustments are according to the following table.

Days Adjustment
197 -4.07%
198 -4.09%
199 -4.11%
200 -4.13%
201 -4.15%
202 -4.17%
203 -4.19%

Final Ranking Score

76%

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.