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

79.59%

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 1806 days 84%
Ben Blackwell 8/10 1820 days 100%
mathieu boustie 5/10 1917 days 81%
Mattias 7/10 2528 days 59%
Arnaud Memay 7/10 2609 days 54%
Susser 8/10 2609 days 57%
Samuel Fritscher 9/10 2917 days 42%
Fabian and Teresa 10/10 2943 days 41%
Joroen Borkert 7/10 2999 days 34%
Faassen 8/10 3020 days 34%
Ben Simons 9/10 3283 days 21%
Martin Beuker 4/10 3293 days 16%
Romla 8/10 3294 days 19%
Marie Dutron 8/10 3297 days 19%
Preben vil Helmsen 10/10 3299 days 20%
Rick & Suus 8/10 3300 days 19%
Nora 9/10 3300 days 20%
Barry Baily 9/10 3300 days 20%
Christiane & Dirk 8/10 3301 days 19%
Scott Simpson 5/10 3304 days 16%
Wolfgang Beute 8/10 3304 days 19%
batzi 3/10 3408 days 11%
bow 3/10 3561 days 4%
Nick van de Belt 9/10 3630 days 1%
Patrick Gloede 9/10 3636 days 1%
Stoop 9/10 3639 days 0%
Siegfried Tuiel 10/10 3642 days 0%
Laura Leigh 6/10 3646 days 0%
John Taylor 7/10 3652 days 27%
Jon_and_Family 7/10 3653 days 27%
Marjan Van Den Braak 4/10 3654 days 23%
Wouter Teensma 8/10 3657 days 28%
Ann Parry 10/10 3657 days 29%
Rob 8/10 3668 days 28%
Alan & Gill Geach 7/10 3675 days 27%
Sarah Ewing 9/10 3678 days 29%
John N 8/10 4012 days 28%
Elisabeth Egerup 10/10 4025 days 29%
Wielink 8/10 4026 days 28%
Pierre Pilon 9/10 4026 days 29%
Pascal Auber 8/10 4032 days 28%
Lamb 9/10 4045 days 29%
Tonny 8/10 4045 days 28%
Dawn Campbell 10/10 4077 days 29%
guichard 7/10 4097 days 27%
HairyHaggis 10/10 4108 days 29%
katepat 10/10 4108 days 29%
Colin S 10/10 4116 days 29%
Ulyate 6/10 4119 days 24%
Alex D'Souza 7/10 4169 days 27%
Patrick 9/10 4199 days 29%
billdee 10/10 4230 days 29%
EvertG 8/10 4333 days 28%
KatrinK 10/10 4345 days 29%
David 8/10 4352 days 28%
neeltjec 9/10 4352 days 29%
monikav 10/10 4352 days 29%
Martien van Brakel 9/10 4352 days 29%
kymberlyw 9/10 4354 days 29%
Katy1 8/10 4354 days 28%
Anneleen 8/10 4383 days 28%
RosC 6/10 4387 days 24%
Simon 9/10 4402 days 29%
Gunhild 9/10 4417 days 29%
Lars 10/10 4419 days 29%
Miha 7/10 4457 days 27%
Ana 7/10 4465 days 27%
Cindy 9/10 4466 days 29%
Mark 9/10 4484 days 29%
Stephanie Schikora 10/10 4495 days 29%
Rhys Howell 6/10 4686 days 24%
Ben 9/10 4723 days 29%
Vikki 10/10 4728 days 29%
Kelly Noirin 8/10 4739 days 28%
Ohad 9/10 4745 days 29%
Trinkler 9/10 4745 days 29%
Nancy Dol 9/10 4749 days 29%
George Clark 7/10 4749 days 27%
Kathy Hawey 8/10 4751 days 28%
Myrtille de Vries 9/10 4756 days 29%
Buys 9/10 4757 days 29%
Haemnerli 8/10 4757 days 28%
Vaclaf 9/10 4763 days 29%
Jenny Hulsebosch 9/10 4780 days 29%
Willemien 8/10 4844 days 28%
Vern 7/10 4954 days 27%
James 8/10 4954 days 28%
Rietveld 8/10 5110 days 28%
Janne 8/10 5122 days 28%
Nina 3/10 5124 days 22%
Inga 4/10 5124 days 23%

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

-4.11% Adjustment

There may be an adjustment if this experience hasn't received any reviews within the last 55 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 -4.05%
198 -4.07%
199 -4.09%
200 -4.11%
201 -4.13%
202 -4.15%
203 -4.17%

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.