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

80.11%

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 2037 days 84%
Ben Blackwell 8/10 2051 days 100%
mathieu boustie 5/10 2148 days 80%
Mattias 7/10 2759 days 53%
Arnaud Memay 7/10 2840 days 48%
Susser 8/10 2840 days 50%
Samuel Fritscher 9/10 3148 days 33%
Fabian and Teresa 10/10 3174 days 31%
Joroen Borkert 7/10 3230 days 25%
Faassen 8/10 3251 days 25%
Ben Simons 9/10 3514 days 8%
Martin Beuker 4/10 3524 days 6%
Romla 8/10 3525 days 7%
Marie Dutron 8/10 3528 days 7%
Preben vil Helmsen 10/10 3530 days 7%
Rick & Suus 8/10 3531 days 7%
Nora 9/10 3531 days 7%
Barry Baily 9/10 3531 days 7%
Christiane & Dirk 8/10 3532 days 7%
Scott Simpson 5/10 3535 days 6%
Wolfgang Beute 8/10 3535 days 7%
batzi 3/10 3639 days 0%
bow 3/10 3792 days 25%
Nick van de Belt 9/10 3861 days 33%
Patrick Gloede 9/10 3867 days 33%
Stoop 9/10 3870 days 33%
Siegfried Tuiel 10/10 3873 days 33%
Laura Leigh 6/10 3877 days 28%
John Taylor 7/10 3883 days 30%
Jon_and_Family 7/10 3884 days 30%
Marjan Van Den Braak 4/10 3885 days 26%
Wouter Teensma 8/10 3888 days 32%
Ann Parry 10/10 3888 days 33%
Rob 8/10 3899 days 32%
Alan & Gill Geach 7/10 3906 days 30%
Sarah Ewing 9/10 3909 days 33%
John N 8/10 4243 days 32%
Elisabeth Egerup 10/10 4256 days 33%
Wielink 8/10 4257 days 32%
Pierre Pilon 9/10 4257 days 33%
Pascal Auber 8/10 4263 days 32%
Lamb 9/10 4276 days 33%
Tonny 8/10 4276 days 32%
Dawn Campbell 10/10 4308 days 33%
guichard 7/10 4328 days 30%
HairyHaggis 10/10 4339 days 33%
katepat 10/10 4339 days 33%
Colin S 10/10 4347 days 33%
Ulyate 6/10 4350 days 28%
Alex D'Souza 7/10 4400 days 30%
Patrick 9/10 4430 days 33%
billdee 10/10 4461 days 33%
EvertG 8/10 4564 days 32%
KatrinK 10/10 4576 days 33%
David 8/10 4583 days 32%
neeltjec 9/10 4583 days 33%
monikav 10/10 4583 days 33%
Martien van Brakel 9/10 4583 days 33%
kymberlyw 9/10 4585 days 33%
Katy1 8/10 4585 days 32%
Anneleen 8/10 4614 days 32%
RosC 6/10 4618 days 28%
Simon 9/10 4632 days 33%
Gunhild 9/10 4648 days 33%
Lars 10/10 4650 days 33%
Miha 7/10 4688 days 30%
Ana 7/10 4696 days 30%
Cindy 9/10 4696 days 33%
Mark 9/10 4714 days 33%
Stephanie Schikora 10/10 4726 days 33%
Rhys Howell 6/10 4917 days 28%
Ben 9/10 4954 days 33%
Vikki 10/10 4959 days 33%
Kelly Noirin 8/10 4970 days 32%
Ohad 9/10 4976 days 33%
Trinkler 9/10 4976 days 33%
Nancy Dol 9/10 4980 days 33%
George Clark 7/10 4980 days 30%
Kathy Hawey 8/10 4982 days 32%
Myrtille de Vries 9/10 4987 days 33%
Buys 9/10 4988 days 33%
Haemnerli 8/10 4988 days 32%
Vaclaf 9/10 4994 days 33%
Jenny Hulsebosch 9/10 5011 days 33%
Willemien 8/10 5075 days 32%
Vern 7/10 5185 days 30%
James 8/10 5185 days 32%
Rietveld 8/10 5341 days 32%
Janne 8/10 5353 days 32%
Nina 3/10 5355 days 25%
Inga 4/10 5355 days 26%

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

-3.62% Adjustment

There may be an adjustment if this experience hasn't received any reviews within the last 58 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 -3.57%
198 -3.59%
199 -3.60%
200 -3.62%
201 -3.64%
202 -3.66%
203 -3.68%

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.