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

72.76%

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 1652 days true 3.09 84%
Ben Blackwell 8/10 1666 days true 3.69 100%
mathieu boustie 5/10 1763 days 2.99 81%
Mattias 7/10 2374 days true 2.27 62%
Arnaud Memay 7/10 2455 days true 2.13 58%
Susser 8/10 2455 days true 2.22 60%
Samuel Fritscher 9/10 2763 days true 1.74 47%
Fabian and Teresa 10/10 2789 days true 1.68 46%
Joroen Borkert 7/10 2845 days true 1.43 39%
Faassen 8/10 2866 days true 1.46 40%
Ben Simons 9/10 3129 days true 1.02 28%
Martin Beuker 4/10 3139 days true 0.79 21%
Romla 8/10 3140 days true 0.95 26%
Marie Dutron 8/10 3143 days true 0.94 26%
Preben vil Helmsen 10/10 3145 days true 0.99 27%
Rick & Suus 8/10 3146 days true 0.94 25%
Nora 9/10 3146 days true 0.99 27%
Barry Baily 9/10 3146 days true 0.99 27%
Christiane & Dirk 8/10 3147 days true 0.94 25%
Scott Simpson 5/10 3150 days true 0.79 21%
Wolfgang Beute 8/10 3150 days true 0.93 25%
batzi 3/10 3254 days 0.6 16%
bow 3/10 3407 days 0.37 10%
Nick van de Belt 9/10 3476 days true 0.34 9%
Patrick Gloede 9/10 3482 days true 0.33 9%
Stoop 9/10 3485 days true 0.32 9%
Siegfried Tuiel 10/10 3488 days true 0.32 9%
Laura Leigh 6/10 3492 days true 0.26 7%
John Taylor 7/10 3498 days true 0.27 7%
Jon_and_Family 7/10 3499 days 0.27 7%
Marjan Van Den Braak 4/10 3500 days true 0.23 6%
Wouter Teensma 8/10 3503 days true 0.27 7%
Ann Parry 10/10 3503 days true 0.29 8%
Rob 8/10 3514 days true 0.25 7%
Alan & Gill Geach 7/10 3521 days true 0.23 6%
Sarah Ewing 9/10 3524 days true 0.25 7%
John N 8/10 3858 days true 0.0 0%
Elisabeth Egerup 10/10 3871 days true 0.0 0%
Wielink 8/10 3872 days true 0.0 0%
Pierre Pilon 9/10 3872 days true 0.0 0%
Pascal Auber 8/10 3878 days true 0.0 0%
Lamb 9/10 3891 days true 0.0 0%
Tonny 8/10 3891 days true 0.0 0%
Dawn Campbell 10/10 3923 days 0.0 0%
guichard 7/10 3943 days true 0.0 0%
HairyHaggis 10/10 3954 days 0.0 0%
katepat 10/10 3954 days true 0.0 0%
Colin S 10/10 3962 days true 0.0 0%
Ulyate 6/10 3965 days true 0.0 0%
Alex D'Souza 7/10 4015 days 0.0 0%
Patrick 9/10 4045 days 0.0 0%
billdee 10/10 4076 days true 0.0 0%
EvertG 8/10 4179 days true 0.0 0%
KatrinK 10/10 4191 days true 0.0 0%
David 8/10 4198 days 0.0 0%
neeltjec 9/10 4198 days true 0.0 0%
monikav 10/10 4198 days true 0.0 0%
Martien van Brakel 9/10 4198 days true 0.0 0%
kymberlyw 9/10 4199 days true 0.0 0%
Katy1 8/10 4200 days true 0.0 0%
Anneleen 8/10 4229 days true 0.0 0%
RosC 6/10 4233 days true 0.0 0%
Simon 9/10 4247 days true 0.0 0%
Gunhild 9/10 4263 days true 0.0 0%
Lars 10/10 4265 days true 0.0 0%
Miha 7/10 4303 days true 0.0 0%
Ana 7/10 4311 days true 0.0 0%
Cindy 9/10 4311 days true 0.0 0%
Mark 9/10 4329 days true 0.0 0%
Stephanie Schikora 10/10 4341 days 0.0 0%
Rhys Howell 6/10 4532 days 0.0 0%
Ben 9/10 4569 days true 0.0 0%
Vikki 10/10 4574 days true 0.0 0%
Kelly Noirin 8/10 4585 days true 0.0 0%
Ohad 9/10 4591 days true 0.0 0%
Trinkler 9/10 4591 days true 0.0 0%
Nancy Dol 9/10 4595 days true 0.0 0%
George Clark 7/10 4595 days true 0.0 0%
Kathy Hawey 8/10 4597 days true 0.0 0%
Myrtille de Vries 9/10 4602 days true 0.0 0%
Buys 9/10 4603 days true 0.0 0%
Haemnerli 8/10 4603 days true 0.0 0%
Vaclaf 9/10 4609 days true 0.0 0%
Jenny Hulsebosch 9/10 4626 days true 0.0 0%
Willemien 8/10 4690 days true 0.0 0%
Vern 7/10 4800 days true 0.0 0%
James 8/10 4800 days true 0.0 0%
Rietveld 8/10 4956 days true 0.0 0%
Janne 8/10 4968 days true 0.0 0%
Nina 3/10 4970 days true 0.0 0%
Inga 4/10 4970 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

-3.23% Adjustment

There may be an adjustment if this experience hasn't received any reviews within the last 68 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 -3.18%
198 -3.20%
199 -3.21%
200 -3.23%
201 -3.25%
202 -3.26%
203 -3.28%

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.