Kia ora, 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.
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
80.80%
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 | Relative Weight |
|---|---|---|---|
| Nadja Guiliani | 4/10 | 3167 days | 67% |
| Ben Blackwell | 8/10 | 3181 days | 100% |
| mathieu boustie | 5/10 | 3278 days | 71% |
| Mattias | 7/10 | 3889 days | 38% |
| Arnaud Memay | 7/10 | 3970 days | 31% |
| Susser | 8/10 | 3970 days | 33% |
| Samuel Fritscher | 9/10 | 4278 days | 7% |
| Fabian and Teresa | 10/10 | 4304 days | 5% |
| Joroen Borkert | 7/10 | 4360 days | 0% |
| Faassen | 8/10 | 4381 days | 42% |
| Ben Simons | 9/10 | 4644 days | 42% |
| Martin Beuker | 4/10 | 4654 days | 27% |
| Romla | 8/10 | 4655 days | 42% |
| Marie Dutron | 8/10 | 4658 days | 42% |
| Preben vil Helmsen | 10/10 | 4660 days | 43% |
| Rick & Suus | 8/10 | 4661 days | 42% |
| Nora | 9/10 | 4661 days | 42% |
| Barry Baily | 9/10 | 4661 days | 42% |
| Christiane & Dirk | 8/10 | 4662 days | 42% |
| Scott Simpson | 5/10 | 4665 days | 32% |
| Wolfgang Beute | 8/10 | 4665 days | 42% |
| batzi | 3/10 | 4769 days | 22% |
| bow | 3/10 | 4922 days | 22% |
| Nick van de Belt | 9/10 | 4991 days | 42% |
| Patrick Gloede | 9/10 | 4997 days | 42% |
| Stoop | 9/10 | 5000 days | 42% |
| Siegfried Tuiel | 10/10 | 5003 days | 43% |
| Laura Leigh | 6/10 | 5007 days | 36% |
| John Taylor | 7/10 | 5013 days | 40% |
| Jon_and_Family | 7/10 | 5014 days | 40% |
| Marjan Van Den Braak | 4/10 | 5015 days | 27% |
| Wouter Teensma | 8/10 | 5018 days | 42% |
| Ann Parry | 10/10 | 5018 days | 43% |
| Rob | 8/10 | 5029 days | 42% |
| Alan & Gill Geach | 7/10 | 5036 days | 40% |
| Sarah Ewing | 9/10 | 5039 days | 42% |
| John N | 8/10 | 5373 days | 42% |
| Elisabeth Egerup | 10/10 | 5386 days | 43% |
| Wielink | 8/10 | 5387 days | 42% |
| Pierre Pilon | 9/10 | 5387 days | 42% |
| Pascal Auber | 8/10 | 5393 days | 42% |
| Lamb | 9/10 | 5406 days | 42% |
| Tonny | 8/10 | 5406 days | 42% |
| Dawn Campbell | 10/10 | 5438 days | 43% |
| guichard | 7/10 | 5458 days | 40% |
| HairyHaggis | 10/10 | 5469 days | 43% |
| katepat | 10/10 | 5469 days | 43% |
| Colin S | 10/10 | 5477 days | 43% |
| Ulyate | 6/10 | 5480 days | 36% |
| Alex D'Souza | 7/10 | 5530 days | 40% |
| Patrick | 9/10 | 5560 days | 42% |
| billdee | 10/10 | 5591 days | 43% |
| EvertG | 8/10 | 5694 days | 42% |
| KatrinK | 10/10 | 5706 days | 43% |
| David | 8/10 | 5713 days | 42% |
| neeltjec | 9/10 | 5713 days | 42% |
| monikav | 10/10 | 5713 days | 43% |
| Martien van Brakel | 9/10 | 5713 days | 42% |
| kymberlyw | 9/10 | 5715 days | 42% |
| Katy1 | 8/10 | 5715 days | 42% |
| Anneleen | 8/10 | 5744 days | 42% |
| RosC | 6/10 | 5748 days | 36% |
| Simon | 9/10 | 5763 days | 42% |
| Gunhild | 9/10 | 5778 days | 42% |
| Lars | 10/10 | 5781 days | 43% |
| Miha | 7/10 | 5818 days | 40% |
| Ana | 7/10 | 5826 days | 40% |
| Cindy | 9/10 | 5827 days | 42% |
| Mark | 9/10 | 5845 days | 42% |
| Stephanie Schikora | 10/10 | 5856 days | 43% |
| Rhys Howell | 6/10 | 6047 days | 36% |
| Ben | 9/10 | 6084 days | 42% |
| Vikki | 10/10 | 6089 days | 43% |
| Kelly Noirin | 8/10 | 6100 days | 42% |
| Ohad | 9/10 | 6106 days | 42% |
| Trinkler | 9/10 | 6106 days | 42% |
| Nancy Dol | 9/10 | 6110 days | 42% |
| George Clark | 7/10 | 6110 days | 40% |
| Kathy Hawey | 8/10 | 6112 days | 42% |
| Myrtille de Vries | 9/10 | 6117 days | 42% |
| Buys | 9/10 | 6118 days | 42% |
| Haemnerli | 8/10 | 6118 days | 42% |
| Vaclaf | 9/10 | 6124 days | 42% |
| Jenny Hulsebosch | 9/10 | 6141 days | 42% |
| Willemien | 8/10 | 6205 days | 42% |
| Vern | 7/10 | 6315 days | 40% |
| James | 8/10 | 6315 days | 42% |
| Rietveld | 8/10 | 6471 days | 42% |
| Janne | 8/10 | 6483 days | 42% |
| Nina | 3/10 | 6485 days | 22% |
| Inga | 4/10 | 6485 days | 27% |
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
-4.05% 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 | -3.99% |
| 198 | -4.01% |
| 199 | -4.03% |
| 200 | -4.05% |
| 201 | -4.07% |
| 202 | -4.09% |
| 203 | -4.11% |
| … | … |
Balancing Adjustment
4.00% Adjustment
Every experience's review score is adjusted to balance out the disproportional number of negative reviews that are contributed.
You won't be surprised to learn that disgruntled customers are more likely to leave a review than happy ones. They are motivated to share their experience and warn others. We consider this a good thing and it's why reading the reviews is important. However we've learned it can misrepresent the experience in a more overall sense.
We apply a balancing adjustment to counteract this effect and ensure the ranking score is a more fair representation of the experience. This adjustment is applied equally to all experiences.
Final Ranking Score
81%
The final ranking score once any adjustments, ratings, and rounding has been applied. This value is recalculated each day and a short rolling average is applied. Therefore it may not be precisely accurate based on the other values presented.