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

74.95%

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 4/10 699 days 100%
Ben Blackwell 8/10 713 days 100%
mathieu boustie 5/10 810 days 51%
Mattias 7/10 1421 days 13%
Arnaud Memay 7/10 1502 days 13%
Susser 8/10 1502 days 13%
Samuel Fritscher 9/10 1810 days 11%
Fabian and Teresa 10/10 1836 days 11%
Joroen Borkert 7/10 1892 days 11%
Faassen 8/10 1913 days 11%
Ben Simons 9/10 2176 days 10%
Martin Beuker 4/10 2186 days 9%
Romla 8/10 2187 days 9%
Marie Dutron 8/10 2190 days 9%
Preben vil Helmsen 10/10 2192 days 9%
Rick & Suus 8/10 2193 days 9%
Nora 9/10 2193 days 9%
Barry Baily 9/10 2193 days 9%
Christiane & Dirk 8/10 2194 days 9%
Scott Simpson 5/10 2197 days 9%
Wolfgang Beute 8/10 2197 days 9%
batzi 3/10 2301 days 6%
bow 3/10 2454 days 5%
Nick van de Belt 9/10 2523 days 8%
Patrick Gloede 9/10 2529 days 8%
Stoop 9/10 2532 days 8%
Siegfried Tuiel 10/10 2535 days 8%
Laura Leigh 6/10 2539 days 8%
John Taylor 7/10 2545 days 8%
Jon_and_Family 7/10 2546 days 6%
Marjan Van Den Braak 4/10 2547 days 7%
Wouter Teensma 8/10 2550 days 8%
Ann Parry 10/10 2550 days 8%
Rob 8/10 2561 days 8%
Alan & Gill Geach 7/10 2568 days 8%
Sarah Ewing 9/10 2571 days 8%
John N 8/10 2905 days 6%
Elisabeth Egerup 10/10 2918 days 6%
Wielink 8/10 2919 days 6%
Pierre Pilon 9/10 2919 days 6%
Pascal Auber 8/10 2925 days 6%
Lamb 9/10 2938 days 6%
Tonny 8/10 2938 days 6%
Dawn Campbell 10/10 2970 days 4%
guichard 7/10 2990 days 5%
HairyHaggis 10/10 3001 days 4%
katepat 10/10 3001 days 5%
Colin S 10/10 3009 days 5%
Ulyate 6/10 3012 days 5%
Alex D'Souza 7/10 3062 days 4%
Patrick 9/10 3092 days 4%
billdee 10/10 3123 days 5%
EvertG 8/10 3226 days 4%
KatrinK 10/10 3238 days 4%
David 8/10 3245 days 3%
neeltjec 9/10 3245 days 4%
monikav 10/10 3245 days 4%
Martien van Brakel 9/10 3245 days 4%
kymberlyw 9/10 3246 days 4%
Katy1 8/10 3247 days 4%
Anneleen 8/10 3275 days 4%
RosC 6/10 3280 days 4%
Simon 9/10 3294 days 4%
Gunhild 9/10 3309 days 4%
Lars 10/10 3312 days 4%
Miha 7/10 3349 days 4%
Ana 7/10 3357 days 4%
Cindy 9/10 3358 days 4%
Mark 9/10 3376 days 4%
Stephanie Schikora 10/10 3388 days 2%
Rhys Howell 6/10 3579 days 2%
Ben 9/10 3616 days 2%
Vikki 10/10 3621 days 2%
Kelly Noirin 8/10 3632 days 2%
Ohad 9/10 3638 days 2%
Trinkler 9/10 3638 days 2%
Nancy Dol 9/10 3642 days 2%
George Clark 7/10 3642 days 2%
Kathy Hawey 8/10 3644 days 2%
Myrtille de Vries 9/10 3649 days 2%
Buys 9/10 3650 days 2%
Haemnerli 8/10 3650 days 2%
Vaclaf 9/10 3656 days 2%
Jenny Hulsebosch 9/10 3673 days 2%
Willemien 8/10 3737 days 2%
Vern 7/10 3847 days 1%
James 8/10 3847 days 1%
Rietveld 8/10 4003 days 0%
Janne 8/10 4015 days 0%
Nina 3/10 4017 days 0%
Inga 4/10 4017 days 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 Swim with the Dolphins 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 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 364 days.

The Swim with the Dolphins 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

68%

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.