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 Swimming with 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

Swimming with Dolphins

Valid Reviews

60 Valid Reviews

The Swimming with Dolphins experience has a total of 61 reviews. There are 60 valid reviews that are included when calculating the ranking score and 1 invalid review 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 60 valid reviews:

Rating Count Percentage
10/10 23
38%
9/10 12
20%
8/10 12
20%
7/10 10
17%
6/10 2
3%
5/10 0
0%
4/10 1
2%
3/10 0
0%
2/10 0
0%
1/10 0
0%

86.67% Average

The raw data average (mean) for all the Swimming with Dolphins valid reviews is 86.67% and is based on 60 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

53 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 60 valid reviews, the experience has 53 face-to-face reviews collected during interviews by our team.

Below is the distribution of ratings for the 53 face-to-face reviews:

Rating Count Percentage
10/10 18
34%
9/10 11
21%
8/10 12
23%
7/10 9
17%
6/10 2
4%
5/10 0
0%
4/10 1
2%
3/10 0
0%
2/10 0
0%
1/10 0
0%

85.66% Average

The raw data average (mean) for all the Swimming with Dolphins face-to-face reviews is 85.66% and is based on 53 face-to-face reviews. This value is not used to calculate the ranking score and it only provided here for comparison purposes.

Weighted Average

82.95%

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
Isabel 4/10 871 days true 14.63 95%
Alix 10/10 874 days true 15.29 100%
Claire 10/10 874 days true 15.29 100%
Lena 7/10 914 days true 12.23 79%
Stefano 8/10 941 days true 10.51 67%
Ivan Dupont 7/10 945 days true 10.28 65%
Max Backelandt 7/10 1614 days true 5.15 30%
Marie Toulemonde 8/10 1614 days true 5.15 30%
Annika Marz 7/10 1627 days true 5.13 29%
Julian Zeissler 7/10 1627 days true 5.13 29%
Lena Hanhart 7/10 1632 days true 5.12 29%
Barbara 10/10 1650 days true 5.09 29%
Mark and Eefie 9/10 2075 days true 4.39 24%
Nigel Leighton 10/10 2078 days true 4.38 24%
Laura Diepeveen 8/10 2370 days true 3.9 21%
Stam 8/10 2376 days true 3.89 21%
cpope 10/10 2425 days 3.18 16%
Naomi Kosteaman 9/10 2735 days true 3.3 17%
Samuel Prechel 9/10 2751 days true 3.28 17%
Niels Van Welsenes 10/10 2759 days true 3.26 16%
salsnz 10/10 3035 days 2.34 10%
Jvjm Family 6/10 3084 days true 2.73 13%
Sinjc Grude 8/10 3121 days true 2.67 12%
Rachel & Barak 9/10 3122 days true 2.67 12%
Jeremy & Sarah Rind 10/10 3123 days true 2.67 12%
Andreas Sterki 8/10 3194 days true 2.55 11%
Gina Swindells 10/10 3197 days true 2.54 11%
bogaard 9/10 3312 days true 2.36 10%
Amy_B 10/10 3418 days true 2.18 9%
NancyB 9/10 3418 days true 2.18 9%
TraceyM 8/10 3418 days true 2.18 9%
DanielGermany 6/10 3423 days true 2.17 9%
AndreaT 10/10 3426 days true 2.17 9%
Sue Green 10/10 3430 days 1.8 6%
Greg18 7/10 3430 days 1.8 6%
DavidJ 8/10 3436 days true 2.15 9%
Stolz 10/10 3453 days true 2.12 9%
LindaV 7/10 3464 days true 2.11 8%
Ian 10/10 3478 days true 2.08 8%
HelenUK 8/10 3480 days true 2.08 8%
enthusejohn 10/10 3480 days 1.73 6%
Camilla E 9/10 3485 days 1.73 6%
Zoe Summers 10/10 3642 days 1.51 4%
Benjamin Throk 9/10 3809 days true 1.54 4%
Marion 10/10 3810 days true 1.54 4%
Maria Fahlander 7/10 3820 days true 1.52 4%
Ellie 10/10 3823 days true 1.52 4%
Sanne 8/10 3823 days true 1.52 4%
Claire Masling 8/10 3830 days true 1.5 4%
Sally and David Wallis 9/10 3830 days true 1.5 4%
Jody 9/10 3842 days true 1.48 4%
Eliase 7/10 3844 days true 1.48 4%
Vicki Cook 9/10 3857 days true 1.46 4%
Carola Haaparinne 10/10 3858 days true 1.46 4%
Wayne Best 10/10 3866 days true 1.44 4%
Martin Wright 10/10 3878 days true 1.43 4%
Floren 9/10 3919 days true 1.36 3%
Sebastian 8/10 4148 days true 0.98 1%
Tracy 10/10 4193 days true 0.91 0%
Jacobien 10/10 4200 days true 0.9 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 Swimming with 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 Swimming with 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 Swimming with 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

76%

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.