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

77.67%

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 4/10 881 days true 13.85 100%
Ben Blackwell 8/10 895 days true 13.61 98%
mathieu boustie 5/10 992 days 6.68 45%
Mattias 7/10 1603 days true 5.16 33%
Arnaud Memay 7/10 1684 days true 5.03 32%
Susser 8/10 1684 days true 5.03 32%
Samuel Fritscher 9/10 1992 days true 4.53 28%
Fabian and Teresa 10/10 2018 days true 4.48 28%
Joroen Borkert 7/10 2074 days true 4.39 27%
Faassen 8/10 2095 days true 4.36 27%
Ben Simons 9/10 2358 days true 3.92 24%
Martin Beuker 4/10 2368 days true 3.68 22%
Romla 8/10 2369 days true 3.91 24%
Marie Dutron 8/10 2372 days true 3.9 24%
Preben vil Helmsen 10/10 2374 days true 3.9 24%
Rick & Suus 8/10 2375 days true 3.9 24%
Nora 9/10 2375 days true 3.9 24%
Barry Baily 9/10 2375 days true 3.9 24%
Christiane & Dirk 8/10 2376 days true 3.89 24%
Scott Simpson 5/10 2379 days true 3.89 23%
Wolfgang Beute 8/10 2379 days true 3.89 23%
batzi 3/10 2483 days 2.82 15%
bow 3/10 2636 days 2.63 14%
Nick van de Belt 9/10 2705 days true 3.35 19%
Patrick Gloede 9/10 2711 days true 3.34 19%
Stoop 9/10 2714 days true 3.34 19%
Siegfried Tuiel 10/10 2717 days true 3.33 19%
Laura Leigh 6/10 2721 days true 3.33 19%
John Taylor 7/10 2727 days true 3.32 19%
Jon_and_Family 7/10 2728 days 2.76 15%
Marjan Van Den Braak 4/10 2729 days true 3.12 18%
Wouter Teensma 8/10 2732 days true 3.31 19%
Ann Parry 10/10 2732 days true 3.31 19%
Rob 8/10 2743 days true 3.29 19%
Alan & Gill Geach 7/10 2750 days true 3.28 19%
Sarah Ewing 9/10 2753 days true 3.27 19%
John N 8/10 3087 days true 2.73 15%
Elisabeth Egerup 10/10 3100 days true 2.7 14%
Wielink 8/10 3101 days true 2.7 14%
Pierre Pilon 9/10 3101 days true 2.7 14%
Pascal Auber 8/10 3107 days true 2.69 14%
Lamb 9/10 3120 days true 2.67 14%
Tonny 8/10 3120 days true 2.67 14%
Dawn Campbell 10/10 3152 days 2.18 10%
guichard 7/10 3172 days true 2.59 13%
HairyHaggis 10/10 3183 days 2.14 10%
katepat 10/10 3183 days true 2.57 13%
Colin S 10/10 3191 days true 2.55 13%
Ulyate 6/10 3194 days true 2.55 13%
Alex D'Souza 7/10 3244 days 2.06 9%
Patrick 9/10 3274 days 2.02 9%
billdee 10/10 3305 days true 2.37 12%
EvertG 8/10 3408 days true 2.2 11%
KatrinK 10/10 3420 days true 2.18 10%
David 8/10 3427 days 1.81 7%
neeltjec 9/10 3427 days true 2.17 10%
monikav 10/10 3427 days true 2.17 10%
Martien van Brakel 9/10 3427 days true 2.17 10%
kymberlyw 9/10 3428 days true 2.16 10%
Katy1 8/10 3429 days true 2.16 10%
Anneleen 8/10 3457 days true 2.12 10%
RosC 6/10 3462 days true 2.11 10%
Simon 9/10 3476 days true 2.09 10%
Gunhild 9/10 3491 days true 2.06 9%
Lars 10/10 3494 days true 2.06 9%
Miha 7/10 3532 days true 1.99 9%
Ana 7/10 3539 days true 1.98 9%
Cindy 9/10 3540 days true 1.98 9%
Mark 9/10 3558 days true 1.95 9%
Stephanie Schikora 10/10 3570 days 1.61 6%
Rhys Howell 6/10 3761 days 1.35 4%
Ben 9/10 3798 days true 1.56 6%
Vikki 10/10 3803 days true 1.55 6%
Kelly Noirin 8/10 3814 days true 1.53 5%
Ohad 9/10 3820 days true 1.52 5%
Trinkler 9/10 3820 days true 1.52 5%
Nancy Dol 9/10 3824 days true 1.51 5%
George Clark 7/10 3824 days true 1.51 5%
Kathy Hawey 8/10 3826 days true 1.51 5%
Myrtille de Vries 9/10 3831 days true 1.5 5%
Buys 9/10 3832 days true 1.5 5%
Haemnerli 8/10 3832 days true 1.5 5%
Vaclaf 9/10 3838 days true 1.49 5%
Jenny Hulsebosch 9/10 3855 days true 1.46 5%
Willemien 8/10 3919 days true 1.36 4%
Vern 7/10 4029 days true 1.18 3%
James 8/10 4029 days true 1.18 3%
Rietveld 8/10 4185 days true 0.92 1%
Janne 8/10 4197 days true 0.9 1%
Nina 3/10 4199 days true 0.83 0%
Inga 4/10 4199 days true 0.85 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

70%

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.