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

78.80%

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
Nadja Guiliani 4/10 1065 days true 5.81 96%
Ben Blackwell 8/10 1079 days true 6.05 100%
mathieu boustie 5/10 1176 days 4.89 79%
Mattias 7/10 1787 days true 4.86 78%
Arnaud Memay 7/10 1868 days true 4.73 76%
Susser 8/10 1868 days true 4.73 76%
Samuel Fritscher 9/10 2176 days true 4.22 67%
Fabian and Teresa 10/10 2202 days true 4.18 66%
Joroen Borkert 7/10 2258 days true 4.09 64%
Faassen 8/10 2279 days true 4.05 64%
Ben Simons 9/10 2542 days true 3.62 56%
Martin Beuker 4/10 2552 days true 3.39 52%
Romla 8/10 2553 days true 3.6 56%
Marie Dutron 8/10 2556 days true 3.6 55%
Preben vil Helmsen 10/10 2558 days true 3.6 55%
Rick & Suus 8/10 2559 days true 3.59 55%
Nora 9/10 2559 days true 3.59 55%
Barry Baily 9/10 2559 days true 3.59 55%
Christiane & Dirk 8/10 2560 days true 3.59 55%
Scott Simpson 5/10 2563 days true 3.59 55%
Wolfgang Beute 8/10 2563 days true 3.59 55%
batzi 3/10 2667 days 2.59 37%
bow 3/10 2820 days 2.4 34%
Nick van de Belt 9/10 2889 days true 3.05 45%
Patrick Gloede 9/10 2895 days true 3.04 45%
Stoop 9/10 2898 days true 3.04 45%
Siegfried Tuiel 10/10 2901 days true 3.03 45%
Laura Leigh 6/10 2905 days true 3.02 45%
John Taylor 7/10 2911 days true 3.01 45%
Jon_and_Family 7/10 2912 days 2.51 36%
Marjan Van Den Braak 4/10 2913 days true 2.84 42%
Wouter Teensma 8/10 2916 days true 3.01 45%
Ann Parry 10/10 2916 days true 3.01 45%
Rob 8/10 2927 days true 2.99 44%
Alan & Gill Geach 7/10 2934 days true 2.98 44%
Sarah Ewing 9/10 2937 days true 2.97 44%
John N 8/10 3271 days true 2.42 34%
Elisabeth Egerup 10/10 3284 days true 2.4 34%
Wielink 8/10 3285 days true 2.4 34%
Pierre Pilon 9/10 3285 days true 2.4 34%
Pascal Auber 8/10 3291 days true 2.39 33%
Lamb 9/10 3304 days true 2.37 33%
Tonny 8/10 3304 days true 2.37 33%
Dawn Campbell 10/10 3336 days 1.93 25%
guichard 7/10 3356 days true 2.28 32%
HairyHaggis 10/10 3367 days 1.89 24%
katepat 10/10 3367 days true 2.27 31%
Colin S 10/10 3375 days true 2.25 31%
Ulyate 6/10 3378 days true 2.25 31%
Alex D'Souza 7/10 3428 days 1.8 23%
Patrick 9/10 3458 days 1.76 22%
billdee 10/10 3489 days true 2.06 28%
EvertG 8/10 3592 days true 1.9 24%
KatrinK 10/10 3604 days true 1.88 24%
David 8/10 3611 days 1.55 18%
neeltjec 9/10 3611 days true 1.86 24%
monikav 10/10 3611 days true 1.86 24%
Martien van Brakel 9/10 3611 days true 1.86 24%
kymberlyw 9/10 3612 days true 1.86 24%
Katy1 8/10 3613 days true 1.86 24%
Anneleen 8/10 3641 days true 1.81 23%
RosC 6/10 3646 days true 1.81 23%
Simon 9/10 3660 days true 1.78 22%
Gunhild 9/10 3675 days true 1.76 22%
Lars 10/10 3678 days true 1.75 22%
Miha 7/10 3715 days true 1.69 21%
Ana 7/10 3723 days true 1.68 21%
Cindy 9/10 3724 days true 1.68 21%
Mark 9/10 3742 days true 1.65 20%
Stephanie Schikora 10/10 3754 days 1.36 15%
Rhys Howell 6/10 3945 days 1.1 10%
Ben 9/10 3982 days true 1.25 13%
Vikki 10/10 3987 days true 1.25 13%
Kelly Noirin 8/10 3998 days true 1.23 12%
Ohad 9/10 4004 days true 1.22 12%
Trinkler 9/10 4004 days true 1.22 12%
Nancy Dol 9/10 4008 days true 1.21 12%
George Clark 7/10 4008 days true 1.21 12%
Kathy Hawey 8/10 4010 days true 1.21 12%
Myrtille de Vries 9/10 4015 days true 1.2 12%
Buys 9/10 4016 days true 1.2 12%
Haemnerli 8/10 4016 days true 1.2 12%
Vaclaf 9/10 4022 days true 1.19 12%
Jenny Hulsebosch 9/10 4039 days true 1.16 11%
Willemien 8/10 4103 days true 1.06 9%
Vern 7/10 4213 days true 0.87 6%
James 8/10 4213 days true 0.87 6%
Rietveld 8/10 4369 days true 0.62 1%
Janne 8/10 4381 days true 0.6 1%
Nina 3/10 4383 days true 0.55 0%
Inga 4/10 4383 days true 0.56 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

72%

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.