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

72.37%

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 1713 days true 2.99 84%
Ben Blackwell 8/10 1727 days true 3.58 100%
mathieu boustie 5/10 1824 days 2.89 81%
Mattias 7/10 2435 days true 2.16 61%
Arnaud Memay 7/10 2516 days true 2.02 56%
Susser 8/10 2516 days true 2.11 59%
Samuel Fritscher 9/10 2824 days true 1.62 45%
Fabian and Teresa 10/10 2850 days true 1.57 44%
Joroen Borkert 7/10 2906 days true 1.32 37%
Faassen 8/10 2927 days true 1.34 38%
Ben Simons 9/10 3190 days true 0.9 25%
Martin Beuker 4/10 3200 days true 0.7 19%
Romla 8/10 3201 days true 0.83 23%
Marie Dutron 8/10 3204 days true 0.83 23%
Preben vil Helmsen 10/10 3206 days true 0.87 24%
Rick & Suus 8/10 3207 days true 0.82 23%
Nora 9/10 3207 days true 0.87 24%
Barry Baily 9/10 3207 days true 0.87 24%
Christiane & Dirk 8/10 3208 days true 0.82 23%
Scott Simpson 5/10 3211 days true 0.7 19%
Wolfgang Beute 8/10 3211 days true 0.82 23%
batzi 3/10 3315 days 0.5 14%
bow 3/10 3468 days 0.27 8%
Nick van de Belt 9/10 3537 days true 0.22 6%
Patrick Gloede 9/10 3543 days true 0.21 6%
Stoop 9/10 3546 days true 0.2 6%
Siegfried Tuiel 10/10 3549 days true 0.2 6%
Laura Leigh 6/10 3553 days true 0.16 4%
John Taylor 7/10 3559 days true 0.16 5%
Jon_and_Family 7/10 3560 days 0.16 4%
Marjan Van Den Braak 4/10 3561 days true 0.14 4%
Wouter Teensma 8/10 3564 days true 0.16 4%
Ann Parry 10/10 3564 days true 0.17 5%
Rob 8/10 3575 days true 0.14 4%
Alan & Gill Geach 7/10 3582 days true 0.12 3%
Sarah Ewing 9/10 3585 days true 0.13 4%
John N 8/10 3919 days true 0.0 0%
Elisabeth Egerup 10/10 3932 days true 0.0 0%
Wielink 8/10 3933 days true 0.0 0%
Pierre Pilon 9/10 3933 days true 0.0 0%
Pascal Auber 8/10 3939 days true 0.0 0%
Lamb 9/10 3952 days true 0.0 0%
Tonny 8/10 3952 days true 0.0 0%
Dawn Campbell 10/10 3984 days 0.0 0%
guichard 7/10 4004 days true 0.0 0%
HairyHaggis 10/10 4015 days 0.0 0%
katepat 10/10 4015 days true 0.0 0%
Colin S 10/10 4023 days true 0.0 0%
Ulyate 6/10 4026 days true 0.0 0%
Alex D'Souza 7/10 4076 days 0.0 0%
Patrick 9/10 4106 days 0.0 0%
billdee 10/10 4137 days true 0.0 0%
EvertG 8/10 4240 days true 0.0 0%
KatrinK 10/10 4252 days true 0.0 0%
David 8/10 4259 days 0.0 0%
neeltjec 9/10 4259 days true 0.0 0%
monikav 10/10 4259 days true 0.0 0%
Martien van Brakel 9/10 4259 days true 0.0 0%
kymberlyw 9/10 4260 days true 0.0 0%
Katy1 8/10 4261 days true 0.0 0%
Anneleen 8/10 4289 days true 0.0 0%
RosC 6/10 4294 days true 0.0 0%
Simon 9/10 4308 days true 0.0 0%
Gunhild 9/10 4323 days true 0.0 0%
Lars 10/10 4326 days true 0.0 0%
Miha 7/10 4363 days true 0.0 0%
Ana 7/10 4371 days true 0.0 0%
Cindy 9/10 4372 days true 0.0 0%
Mark 9/10 4390 days true 0.0 0%
Stephanie Schikora 10/10 4401 days 0.0 0%
Rhys Howell 6/10 4592 days 0.0 0%
Ben 9/10 4630 days true 0.0 0%
Vikki 10/10 4635 days true 0.0 0%
Kelly Noirin 8/10 4646 days true 0.0 0%
Ohad 9/10 4652 days true 0.0 0%
Trinkler 9/10 4652 days true 0.0 0%
Nancy Dol 9/10 4656 days true 0.0 0%
George Clark 7/10 4656 days true 0.0 0%
Kathy Hawey 8/10 4658 days true 0.0 0%
Myrtille de Vries 9/10 4663 days true 0.0 0%
Buys 9/10 4664 days true 0.0 0%
Haemnerli 8/10 4664 days true 0.0 0%
Vaclaf 9/10 4670 days true 0.0 0%
Jenny Hulsebosch 9/10 4687 days true 0.0 0%
Willemien 8/10 4751 days true 0.0 0%
Vern 7/10 4861 days true 0.0 0%
James 8/10 4861 days true 0.0 0%
Rietveld 8/10 5017 days true 0.0 0%
Janne 8/10 5029 days true 0.0 0%
Nina 3/10 5031 days true 0.0 0%
Inga 4/10 5031 days true 0.0 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

-4.07% Adjustment

There may be an adjustment if this experience hasn't received any reviews within the last 43 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 -4.01%
198 -4.03%
199 -4.05%
200 -4.07%
201 -4.09%
202 -4.11%
203 -4.13%

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.