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

76.53%

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 4/10 798 days true 21.44 100%
Ben Blackwell 8/10 812 days true 21.23 99%
mathieu boustie 5/10 909 days 10.48 46%
Mattias 7/10 1520 days true 5.3 21%
Arnaud Memay 7/10 1601 days true 5.17 21%
Susser 8/10 1601 days true 5.17 21%
Samuel Fritscher 9/10 1909 days true 4.66 18%
Fabian and Teresa 10/10 1935 days true 4.62 18%
Joroen Borkert 7/10 1991 days true 4.53 17%
Faassen 8/10 2012 days true 4.49 17%
Ben Simons 9/10 2275 days true 4.06 15%
Martin Beuker 4/10 2285 days true 3.81 14%
Romla 8/10 2286 days true 4.04 15%
Marie Dutron 8/10 2289 days true 4.04 15%
Preben vil Helmsen 10/10 2291 days true 4.03 15%
Rick & Suus 8/10 2292 days true 4.03 15%
Nora 9/10 2292 days true 4.03 15%
Barry Baily 9/10 2292 days true 4.03 15%
Christiane & Dirk 8/10 2293 days true 4.03 15%
Scott Simpson 5/10 2296 days true 4.03 15%
Wolfgang Beute 8/10 2296 days true 4.03 15%
batzi 3/10 2400 days 2.92 10%
bow 3/10 2552 days 2.73 9%
Nick van de Belt 9/10 2622 days true 3.49 12%
Patrick Gloede 9/10 2628 days true 3.48 12%
Stoop 9/10 2631 days true 3.48 12%
Siegfried Tuiel 10/10 2634 days true 3.47 12%
Laura Leigh 6/10 2638 days true 3.46 12%
John Taylor 7/10 2644 days true 3.45 12%
Jon_and_Family 7/10 2645 days 2.88 9%
Marjan Van Den Braak 4/10 2646 days true 3.25 11%
Wouter Teensma 8/10 2649 days true 3.45 12%
Ann Parry 10/10 2649 days true 3.45 12%
Rob 8/10 2660 days true 3.43 12%
Alan & Gill Geach 7/10 2667 days true 3.42 12%
Sarah Ewing 9/10 2670 days true 3.41 12%
John N 8/10 3004 days true 2.86 9%
Elisabeth Egerup 10/10 3017 days true 2.84 9%
Wielink 8/10 3018 days true 2.84 9%
Pierre Pilon 9/10 3018 days true 2.84 9%
Pascal Auber 8/10 3024 days true 2.83 9%
Lamb 9/10 3037 days true 2.81 9%
Tonny 8/10 3037 days true 2.81 9%
Dawn Campbell 10/10 3069 days 2.3 7%
guichard 7/10 3089 days true 2.72 9%
HairyHaggis 10/10 3100 days 2.25 6%
katepat 10/10 3100 days true 2.7 9%
Colin S 10/10 3108 days true 2.69 8%
Ulyate 6/10 3111 days true 2.69 8%
Alex D'Souza 7/10 3161 days 2.17 6%
Patrick 9/10 3190 days 2.13 6%
billdee 10/10 3221 days true 2.51 8%
EvertG 8/10 3324 days true 2.34 7%
KatrinK 10/10 3336 days true 2.32 7%
David 8/10 3344 days 1.92 5%
neeltjec 9/10 3344 days true 2.3 7%
monikav 10/10 3344 days true 2.3 7%
Martien van Brakel 9/10 3344 days true 2.3 7%
kymberlyw 9/10 3345 days true 2.3 7%
Katy1 8/10 3346 days true 2.3 7%
Anneleen 8/10 3374 days true 2.25 6%
RosC 6/10 3379 days true 2.25 6%
Simon 9/10 3393 days true 2.22 6%
Gunhild 9/10 3408 days true 2.2 6%
Lars 10/10 3411 days true 2.19 6%
Miha 7/10 3448 days true 2.13 6%
Ana 7/10 3456 days true 2.12 6%
Cindy 9/10 3457 days true 2.12 6%
Mark 9/10 3475 days true 2.09 6%
Stephanie Schikora 10/10 3486 days 1.72 4%
Rhys Howell 6/10 3677 days 1.46 2%
Ben 9/10 3715 days true 1.69 4%
Vikki 10/10 3720 days true 1.68 4%
Kelly Noirin 8/10 3731 days true 1.67 3%
Ohad 9/10 3737 days true 1.66 3%
Trinkler 9/10 3737 days true 1.66 3%
Nancy Dol 9/10 3741 days true 1.65 3%
George Clark 7/10 3741 days true 1.65 3%
Kathy Hawey 8/10 3743 days true 1.65 3%
Myrtille de Vries 9/10 3748 days true 1.64 3%
Buys 9/10 3749 days true 1.64 3%
Haemnerli 8/10 3749 days true 1.64 3%
Vaclaf 9/10 3755 days true 1.63 3%
Jenny Hulsebosch 9/10 3772 days true 1.6 3%
Willemien 8/10 3836 days true 1.49 3%
Vern 7/10 3945 days true 1.32 2%
James 8/10 3945 days true 1.32 2%
Rietveld 8/10 4102 days true 1.06 0%
Janne 8/10 4114 days true 1.04 0%
Nina 3/10 4116 days true 0.96 0%
Inga 4/10 4116 days true 0.97 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

69%

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.