Hey, 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 White Island Tours.
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.
White Island Tours
Valid Reviews
129 Valid Reviews
The White Island Tours experience has a total of 129 valid reviews. There are no 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 129 valid reviews:
| Rating | Count | Percentage | |
|---|---|---|---|
| 10/10 | 48 |
|
37% |
| 9/10 | 42 |
|
33% |
| 8/10 | 19 |
|
15% |
| 7/10 | 17 |
|
13% |
| 6/10 | 0 |
|
0% |
| 5/10 | 1 |
|
1% |
| 4/10 | 1 |
|
1% |
| 3/10 | 0 |
|
0% |
| 2/10 | 0 |
|
0% |
| 1/10 | 1 |
|
1% |
88.29% Average
The raw data average (mean) for all the White Island Tours valid reviews is 88.29% and is based on 129 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
105 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 129 valid reviews, the experience has 105 face-to-face reviews collected during interviews by our team.
Below is the distribution of ratings for the 105 face-to-face reviews:
| Rating | Count | Percentage | |
|---|---|---|---|
| 10/10 | 34 |
|
32% |
| 9/10 | 35 |
|
33% |
| 8/10 | 18 |
|
17% |
| 7/10 | 16 |
|
15% |
| 6/10 | 0 |
|
0% |
| 5/10 | 0 |
|
0% |
| 4/10 | 1 |
|
1% |
| 3/10 | 0 |
|
0% |
| 2/10 | 0 |
|
0% |
| 1/10 | 1 |
|
1% |
87.24% Average
The raw data average (mean) for all the White Island Tours face-to-face reviews is 87.24% and is based on 105 face-to-face reviews. This value is not used to calculate the ranking score and it only provided here for comparison purposes.
Weighted Average
89.66%
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 |
|---|---|---|---|
| Matthew Mutimer | 10/10 | 2362 days | 100% |
| Amanda Walden | 10/10 | 3245 days | 56% |
| Monique Pos | 9/10 | 3335 days | 51% |
| Alison Egan-Jones | 9/10 | 3365 days | 49% |
| Sylvain Schiber | 9/10 | 3365 days | 49% |
| Sylvain Chanton | 10/10 | 3370 days | 50% |
| Julian Gury | 8/10 | 3378 days | 48% |
| R. Damen | 9/10 | 3396 days | 48% |
| Michelle Smit | 10/10 | 3457 days | 45% |
| Gesa Roemer | 8/10 | 3586 days | 38% |
| Anais Roux | 10/10 | 3591 days | 39% |
| Luca Staudt | 8/10 | 3610 days | 37% |
| Florian Bisault | 7/10 | 3611 days | 35% |
| Anna Jungclaus | 9/10 | 3618 days | 37% |
| Signe Broedbaek | 7/10 | 3620 days | 35% |
| Petra Fragner | 10/10 | 3626 days | 37% |
| Koehler Ute | 10/10 | 3639 days | 36% |
| Niclas Ullno | 8/10 | 3641 days | 35% |
| Tamara | 7/10 | 3642 days | 34% |
| Chloe Guerillot | 9/10 | 3652 days | 35% |
| Luisa and Hannes | 9/10 | 3665 days | 35% |
| elena salimzhanova | 10/10 | 3670 days | 35% |
| Jakub Trojanek | 8/10 | 3680 days | 34% |
| Malina | 10/10 | 3686 days | 34% |
| Emma Keegan | 7/10 | 3945 days | 20% |
| Emilie Normand | 7/10 | 4015 days | 16% |
| Christopher Buch Madsen | 8/10 | 4336 days | 1% |
| Phil Bromby | 9/10 | 4338 days | 1% |
| Tobias Thull | 7/10 | 4344 days | 1% |
| Rita Hochstiasser | 8/10 | 4366 days | 0% |
| Nelle Dutilleur | 10/10 | 4387 days | 25% |
| Mathias Butterlin | 8/10 | 4387 days | 24% |
| Daryl | 8/10 | 4395 days | 24% |
| Bert Pubeg | 9/10 | 4461 days | 25% |
| Alex | 8/10 | 4765 days | 24% |
| Lucie | 9/10 | 4801 days | 25% |
| Henzen | 9/10 | 4805 days | 25% |
| Roy Barton | 9/10 | 5068 days | 25% |
| Brian Livesey | 9/10 | 5076 days | 25% |
| Merlyn | 8/10 | 5084 days | 24% |
| Beyeler | 10/10 | 5088 days | 25% |
| Ralf Glaser | 7/10 | 5088 days | 23% |
| Suzanne van Kol | 8/10 | 5093 days | 24% |
| kiwifrenchy | 10/10 | 5100 days | 25% |
| _mel_ | 9/10 | 5131 days | 25% |
| C | 10/10 | 5131 days | 25% |
| Sarah and Soren | 10/10 | 5168 days | 25% |
| Erik Folkersen | 10/10 | 5176 days | 25% |
| Rudlinger | 10/10 | 5179 days | 25% |
| GenH | 10/10 | 5406 days | 25% |
| R Tearle | 10/10 | 5415 days | 25% |
| Franzi & Tobi | 10/10 | 5417 days | 25% |
| Nathalie | 10/10 | 5421 days | 25% |
| Ven | 9/10 | 5423 days | 25% |
| Jerven and Kim | 10/10 | 5430 days | 25% |
| Sarah Luijckx | 1/10 | 5432 days | 10% |
| Alan Jeffery | 7/10 | 5433 days | 23% |
| Birgette Weiner | 9/10 | 5451 days | 25% |
| Tim Van Nispen | 9/10 | 5453 days | 25% |
| Bottcher | 10/10 | 5453 days | 25% |
| Sue & Graham Mullin | 10/10 | 5460 days | 25% |
| John Simpson | 9/10 | 5462 days | 25% |
| Karen Phillips | 9/10 | 5462 days | 25% |
| Michelle Booty | 8/10 | 5464 days | 24% |
| Nadia Husain | 7/10 | 5465 days | 23% |
| Dietmar Gans | 10/10 | 5771 days | 25% |
| Matt Roper | 10/10 | 5793 days | 25% |
| Chris Glasg | 10/10 | 5810 days | 25% |
| Jamie Hallifax | 9/10 | 5821 days | 25% |
| Paul Ritchie | 10/10 | 5825 days | 25% |
| Gerry Donoghue | 10/10 | 5844 days | 25% |
| Yvonne German | 9/10 | 5847 days | 25% |
| DebbieM | 5/10 | 5861 days | 19% |
| mj111 | 10/10 | 5861 days | 25% |
| Susann Koschmeider | 10/10 | 5896 days | 25% |
| X Otte | 10/10 | 5900 days | 25% |
| Hans Hoff | 10/10 | 5900 days | 25% |
| Solveig Mosinski | 10/10 | 5904 days | 25% |
| Val and Barnie Weir | 10/10 | 5915 days | 25% |
| Wim Put | 9/10 | 5918 days | 25% |
| discerner | 10/10 | 5922 days | 25% |
| Phillip Reade | 10/10 | 5922 days | 25% |
| Tim Beuzeval | 9/10 | 5922 days | 25% |
| barp | 9/10 | 5953 days | 25% |
| Becky Fairweather | 10/10 | 6106 days | 25% |
| David | 10/10 | 6136 days | 25% |
| martinat | 10/10 | 6136 days | 25% |
| Mike | 9/10 | 6146 days | 25% |
| MichaelS1 | 9/10 | 6152 days | 25% |
| StefanieGermany | 9/10 | 6154 days | 25% |
| Veronika | 9/10 | 6156 days | 25% |
| Ralph Boese | 7/10 | 6156 days | 23% |
| ToyalFrance | 9/10 | 6156 days | 25% |
| ReneeA | 9/10 | 6184 days | 25% |
| Lorna | 8/10 | 6186 days | 24% |
| Bruce | 10/10 | 6187 days | 25% |
| Sandra | 10/10 | 6193 days | 25% |
| Heidi | 7/10 | 6201 days | 23% |
| Philipp | 9/10 | 6201 days | 25% |
| Simon | 9/10 | 6202 days | 25% |
| Kathryn | 8/10 | 6203 days | 24% |
| Barbara | 9/10 | 6208 days | 25% |
| Joachim | 10/10 | 6209 days | 25% |
| Ans | 7/10 | 6209 days | 23% |
| Minder | 10/10 | 6211 days | 25% |
| Evi | 7/10 | 6242 days | 23% |
| Ann Maree | 9/10 | 6245 days | 25% |
| Trine | 9/10 | 6255 days | 25% |
| Carina Korn | 10/10 | 6352 days | 25% |
| Christian | 7/10 | 6352 days | 23% |
| Nick | 10/10 | 6355 days | 25% |
| Terri Scott | 7/10 | 6372 days | 23% |
| Alan Bellerby | 10/10 | 6522 days | 25% |
| Robert | 4/10 | 6528 days | 16% |
| Elise | 10/10 | 6528 days | 25% |
| Fung | 8/10 | 6528 days | 24% |
| Peter Aston | 9/10 | 6528 days | 25% |
| Tony Wicks | 8/10 | 6533 days | 24% |
| Sue | 8/10 | 6540 days | 24% |
| Carla | 9/10 | 6548 days | 25% |
| Melissa Steedman | 9/10 | 6575 days | 25% |
| Vanessa Brennan | 7/10 | 6575 days | 23% |
| Tim | 9/10 | 6576 days | 25% |
| Mary | 10/10 | 6626 days | 25% |
| Agnes | 9/10 | 6842 days | 25% |
| Cohen | 9/10 | 6862 days | 25% |
| John | 8/10 | 6866 days | 24% |
| SueLinsk | 9/10 | 6866 days | 25% |
| Frauke | 7/10 | 6908 days | 23% |
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 White Island Tours experience has plenty of reviews and does not meet the criteria for any adjustment.
Recent Reviews Adjustment
-4.09% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 46 days. However the White Island Tours 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 White Island Tours experience has been adjusted for 200 days. Adjustments are according to the following table.
| Days | Adjustment |
|---|---|
| … | … |
| 197 | -4.03% |
| 198 | -4.05% |
| 199 | -4.07% |
| 200 | -4.09% |
| 201 | -4.11% |
| 202 | -4.13% |
| 203 | -4.15% |
| … | … |
Balancing Adjustment
1.71% 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
87%
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.