Hi, 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.
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
86.65%
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 |
|---|---|---|---|
| Isabel | 4/10 | 3221 days | 49% |
| Alix | 10/10 | 3224 days | 100% |
| Claire | 10/10 | 3224 days | 100% |
| Lena | 7/10 | 3264 days | 85% |
| Stefano | 8/10 | 3291 days | 89% |
| Ivan Dupont | 7/10 | 3295 days | 81% |
| Max Backelandt | 7/10 | 3964 days | 2% |
| Marie Toulemonde | 8/10 | 3964 days | 5% |
| Annika Marz | 7/10 | 3977 days | 1% |
| Julian Zeissler | 7/10 | 3977 days | 1% |
| Lena Hanhart | 7/10 | 3982 days | 0% |
| Barbara | 10/10 | 4000 days | 1% |
| Mark and Eefie | 9/10 | 4425 days | 17% |
| Nigel Leighton | 10/10 | 4428 days | 18% |
| Laura Diepeveen | 8/10 | 4720 days | 17% |
| Stam | 8/10 | 4726 days | 17% |
| cpope | 10/10 | 4775 days | 18% |
| Naomi Kosteaman | 9/10 | 5085 days | 17% |
| Samuel Prechel | 9/10 | 5101 days | 17% |
| Niels Van Welsenes | 10/10 | 5109 days | 18% |
| salsnz | 10/10 | 5385 days | 18% |
| Jvjm Family | 6/10 | 5434 days | 9% |
| Sinjc Grude | 8/10 | 5471 days | 17% |
| Rachel & Barak | 9/10 | 5472 days | 17% |
| Jeremy & Sarah Rind | 10/10 | 5473 days | 18% |
| Andreas Sterki | 8/10 | 5544 days | 17% |
| Gina Swindells | 10/10 | 5547 days | 18% |
| bogaard | 9/10 | 5662 days | 17% |
| Amy_B | 10/10 | 5768 days | 18% |
| NancyB | 9/10 | 5768 days | 17% |
| TraceyM | 8/10 | 5768 days | 17% |
| DanielGermany | 6/10 | 5773 days | 9% |
| AndreaT | 10/10 | 5776 days | 18% |
| Sue Green | 10/10 | 5780 days | 18% |
| Greg18 | 7/10 | 5780 days | 13% |
| DavidJ | 8/10 | 5786 days | 17% |
| Stolz | 10/10 | 5804 days | 18% |
| LindaV | 7/10 | 5814 days | 13% |
| Ian | 10/10 | 5828 days | 18% |
| HelenUK | 8/10 | 5830 days | 17% |
| enthusejohn | 10/10 | 5831 days | 18% |
| Camilla E | 9/10 | 5836 days | 17% |
| Zoe Summers | 10/10 | 5992 days | 18% |
| Benjamin Throk | 9/10 | 6159 days | 17% |
| Marion | 10/10 | 6160 days | 18% |
| Maria Fahlander | 7/10 | 6170 days | 13% |
| Ellie | 10/10 | 6173 days | 18% |
| Sanne | 8/10 | 6173 days | 17% |
| Claire Masling | 8/10 | 6180 days | 17% |
| Sally and David Wallis | 9/10 | 6180 days | 17% |
| Jody | 9/10 | 6192 days | 17% |
| Eliase | 7/10 | 6194 days | 13% |
| Vicki Cook | 9/10 | 6207 days | 17% |
| Carola Haaparinne | 10/10 | 6208 days | 18% |
| Wayne Best | 10/10 | 6216 days | 18% |
| Martin Wright | 10/10 | 6228 days | 18% |
| Floren | 9/10 | 6269 days | 17% |
| Sebastian | 8/10 | 6498 days | 17% |
| Tracy | 10/10 | 6543 days | 18% |
| Jacobien | 10/10 | 6550 days | 18% |
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
-4.13% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 48 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 200 days. Due to the seasonal nature of many businesses, this adjustment is applied dynamically throughout the year.
The Swimming with Dolphins experience has been adjusted for 200 days. Adjustments are according to the following table.
| Days | Adjustment |
|---|---|
| … | … |
| 197 | -4.07% |
| 198 | -4.09% |
| 199 | -4.11% |
| 200 | -4.13% |
| 201 | -4.15% |
| 202 | -4.17% |
| 203 | -4.19% |
| … | … |
Balancing Adjustment
2.36% 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
85%
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.