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
81.14%
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 | 3279 days | 56% |
| Ben Blackwell | 8/10 | 3293 days | 100% |
| mathieu boustie | 5/10 | 3390 days | 61% |
| Mattias | 7/10 | 4001 days | 10% |
| Arnaud Memay | 7/10 | 4082 days | 0% |
| Susser | 8/10 | 4082 days | 2% |
| Samuel Fritscher | 9/10 | 4390 days | 29% |
| Fabian and Teresa | 10/10 | 4416 days | 30% |
| Joroen Borkert | 7/10 | 4472 days | 25% |
| Faassen | 8/10 | 4493 days | 28% |
| Ben Simons | 9/10 | 4756 days | 29% |
| Martin Beuker | 4/10 | 4766 days | 7% |
| Romla | 8/10 | 4767 days | 28% |
| Marie Dutron | 8/10 | 4770 days | 28% |
| Preben vil Helmsen | 10/10 | 4772 days | 30% |
| Rick & Suus | 8/10 | 4773 days | 28% |
| Nora | 9/10 | 4773 days | 29% |
| Barry Baily | 9/10 | 4773 days | 29% |
| Christiane & Dirk | 8/10 | 4774 days | 28% |
| Scott Simpson | 5/10 | 4777 days | 14% |
| Wolfgang Beute | 8/10 | 4777 days | 28% |
| batzi | 3/10 | 4881 days | 0% |
| bow | 3/10 | 5034 days | 0% |
| Nick van de Belt | 9/10 | 5103 days | 29% |
| Patrick Gloede | 9/10 | 5109 days | 29% |
| Stoop | 9/10 | 5112 days | 29% |
| Siegfried Tuiel | 10/10 | 5115 days | 30% |
| Laura Leigh | 6/10 | 5119 days | 21% |
| John Taylor | 7/10 | 5125 days | 25% |
| Jon_and_Family | 7/10 | 5126 days | 25% |
| Marjan Van Den Braak | 4/10 | 5127 days | 7% |
| Wouter Teensma | 8/10 | 5130 days | 28% |
| Ann Parry | 10/10 | 5130 days | 30% |
| Rob | 8/10 | 5141 days | 28% |
| Alan & Gill Geach | 7/10 | 5148 days | 25% |
| Sarah Ewing | 9/10 | 5151 days | 29% |
| John N | 8/10 | 5485 days | 28% |
| Elisabeth Egerup | 10/10 | 5498 days | 30% |
| Wielink | 8/10 | 5499 days | 28% |
| Pierre Pilon | 9/10 | 5499 days | 29% |
| Pascal Auber | 8/10 | 5505 days | 28% |
| Lamb | 9/10 | 5518 days | 29% |
| Tonny | 8/10 | 5518 days | 28% |
| Dawn Campbell | 10/10 | 5550 days | 30% |
| guichard | 7/10 | 5570 days | 25% |
| HairyHaggis | 10/10 | 5581 days | 30% |
| katepat | 10/10 | 5581 days | 30% |
| Colin S | 10/10 | 5589 days | 30% |
| Ulyate | 6/10 | 5592 days | 21% |
| Alex D'Souza | 7/10 | 5642 days | 25% |
| Patrick | 9/10 | 5672 days | 29% |
| billdee | 10/10 | 5703 days | 30% |
| EvertG | 8/10 | 5806 days | 28% |
| KatrinK | 10/10 | 5818 days | 30% |
| David | 8/10 | 5825 days | 28% |
| neeltjec | 9/10 | 5825 days | 29% |
| monikav | 10/10 | 5825 days | 30% |
| Martien van Brakel | 9/10 | 5825 days | 29% |
| kymberlyw | 9/10 | 5826 days | 29% |
| Katy1 | 8/10 | 5827 days | 28% |
| Anneleen | 8/10 | 5855 days | 28% |
| RosC | 6/10 | 5860 days | 21% |
| Simon | 9/10 | 5874 days | 29% |
| Gunhild | 9/10 | 5889 days | 29% |
| Lars | 10/10 | 5892 days | 30% |
| Miha | 7/10 | 5929 days | 25% |
| Ana | 7/10 | 5937 days | 25% |
| Cindy | 9/10 | 5938 days | 29% |
| Mark | 9/10 | 5956 days | 29% |
| Stephanie Schikora | 10/10 | 5968 days | 30% |
| Rhys Howell | 6/10 | 6159 days | 21% |
| Ben | 9/10 | 6196 days | 29% |
| Vikki | 10/10 | 6201 days | 30% |
| Kelly Noirin | 8/10 | 6212 days | 28% |
| Ohad | 9/10 | 6218 days | 29% |
| Trinkler | 9/10 | 6218 days | 29% |
| Nancy Dol | 9/10 | 6222 days | 29% |
| George Clark | 7/10 | 6222 days | 25% |
| Kathy Hawey | 8/10 | 6224 days | 28% |
| Myrtille de Vries | 9/10 | 6229 days | 29% |
| Buys | 9/10 | 6230 days | 29% |
| Haemnerli | 8/10 | 6230 days | 28% |
| Vaclaf | 9/10 | 6236 days | 29% |
| Jenny Hulsebosch | 9/10 | 6253 days | 29% |
| Willemien | 8/10 | 6317 days | 28% |
| Vern | 7/10 | 6427 days | 25% |
| James | 8/10 | 6427 days | 28% |
| Rietveld | 8/10 | 6583 days | 28% |
| Janne | 8/10 | 6595 days | 28% |
| Nina | 3/10 | 6597 days | 0% |
| Inga | 4/10 | 6597 days | 7% |
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
-4.01% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 57 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 | -3.95% |
| 198 | -3.97% |
| 199 | -3.99% |
| 200 | -4.01% |
| 201 | -4.03% |
| 202 | -4.05% |
| 203 | -4.07% |
| … | … |
Balancing Adjustment
3.87% 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.