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

73.30%

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 1538 days true 3.27 84%
Ben Blackwell 8/10 1552 days true 3.9 100%
mathieu boustie 5/10 1649 days 3.17 81%
Mattias 7/10 2260 days true 2.48 63%
Arnaud Memay 7/10 2341 days true 2.33 60%
Susser 8/10 2341 days true 2.43 62%
Samuel Fritscher 9/10 2649 days true 1.96 50%
Fabian and Teresa 10/10 2675 days true 1.91 49%
Joroen Borkert 7/10 2731 days true 1.64 42%
Faassen 8/10 2752 days true 1.67 43%
Ben Simons 9/10 3015 days true 1.24 32%
Martin Beuker 4/10 3025 days true 0.97 25%
Romla 8/10 3026 days true 1.16 30%
Marie Dutron 8/10 3029 days true 1.15 30%
Preben vil Helmsen 10/10 3031 days true 1.21 31%
Rick & Suus 8/10 3032 days true 1.15 29%
Nora 9/10 3032 days true 1.21 31%
Barry Baily 9/10 3032 days true 1.21 31%
Christiane & Dirk 8/10 3033 days true 1.15 29%
Scott Simpson 5/10 3036 days true 0.97 25%
Wolfgang Beute 8/10 3036 days true 1.14 29%
batzi 3/10 3140 days 0.77 20%
bow 3/10 3293 days 0.54 14%
Nick van de Belt 9/10 3362 days true 0.56 14%
Patrick Gloede 9/10 3368 days true 0.55 14%
Stoop 9/10 3371 days true 0.55 14%
Siegfried Tuiel 10/10 3374 days true 0.54 14%
Laura Leigh 6/10 3378 days true 0.44 11%
John Taylor 7/10 3384 days true 0.47 12%
Jon_and_Family 7/10 3385 days 0.47 12%
Marjan Van Den Braak 4/10 3386 days true 0.41 10%
Wouter Teensma 8/10 3389 days true 0.49 12%
Ann Parry 10/10 3389 days true 0.51 13%
Rob 8/10 3400 days true 0.46 12%
Alan & Gill Geach 7/10 3407 days true 0.43 11%
Sarah Ewing 9/10 3410 days true 0.47 12%
John N 8/10 3744 days true 0.0 0%
Elisabeth Egerup 10/10 3757 days true 0.0 0%
Wielink 8/10 3758 days true 0.0 0%
Pierre Pilon 9/10 3758 days true 0.0 0%
Pascal Auber 8/10 3764 days true 0.0 0%
Lamb 9/10 3777 days true 0.0 0%
Tonny 8/10 3777 days true 0.0 0%
Dawn Campbell 10/10 3809 days 0.0 0%
guichard 7/10 3829 days true 0.0 0%
HairyHaggis 10/10 3840 days 0.0 0%
katepat 10/10 3840 days true 0.0 0%
Colin S 10/10 3848 days true 0.0 0%
Ulyate 6/10 3851 days true 0.0 0%
Alex D'Souza 7/10 3901 days 0.0 0%
Patrick 9/10 3931 days 0.0 0%
billdee 10/10 3962 days true 0.0 0%
EvertG 8/10 4065 days true 0.0 0%
KatrinK 10/10 4077 days true 0.0 0%
David 8/10 4084 days 0.0 0%
neeltjec 9/10 4084 days true 0.0 0%
monikav 10/10 4084 days true 0.0 0%
Martien van Brakel 9/10 4084 days true 0.0 0%
kymberlyw 9/10 4086 days true 0.0 0%
Katy1 8/10 4086 days true 0.0 0%
Anneleen 8/10 4115 days true 0.0 0%
RosC 6/10 4119 days true 0.0 0%
Simon 9/10 4134 days true 0.0 0%
Gunhild 9/10 4149 days true 0.0 0%
Lars 10/10 4152 days true 0.0 0%
Miha 7/10 4189 days true 0.0 0%
Ana 7/10 4197 days true 0.0 0%
Cindy 9/10 4198 days true 0.0 0%
Mark 9/10 4216 days true 0.0 0%
Stephanie Schikora 10/10 4227 days 0.0 0%
Rhys Howell 6/10 4418 days 0.0 0%
Ben 9/10 4455 days true 0.0 0%
Vikki 10/10 4460 days true 0.0 0%
Kelly Noirin 8/10 4471 days true 0.0 0%
Ohad 9/10 4477 days true 0.0 0%
Trinkler 9/10 4477 days true 0.0 0%
Nancy Dol 9/10 4481 days true 0.0 0%
George Clark 7/10 4481 days true 0.0 0%
Kathy Hawey 8/10 4483 days true 0.0 0%
Myrtille de Vries 9/10 4488 days true 0.0 0%
Buys 9/10 4489 days true 0.0 0%
Haemnerli 8/10 4489 days true 0.0 0%
Vaclaf 9/10 4495 days true 0.0 0%
Jenny Hulsebosch 9/10 4512 days true 0.0 0%
Willemien 8/10 4576 days true 0.0 0%
Vern 7/10 4686 days true 0.0 0%
James 8/10 4686 days true 0.0 0%
Rietveld 8/10 4842 days true 0.0 0%
Janne 8/10 4854 days true 0.0 0%
Nina 3/10 4856 days true 0.0 0%
Inga 4/10 4856 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

-2.34% Adjustment

There may be an adjustment if this experience hasn't received any reviews within the last 110 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 -2.31%
198 -2.32%
199 -2.33%
200 -2.34%
201 -2.36%
202 -2.37%
203 -2.38%

Final Ranking Score

71%

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.