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
89.37%
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 | 2049 days | 100% |
| Amanda Walden | 10/10 | 2932 days | 58% |
| Monique Pos | 9/10 | 3022 days | 54% |
| Alison Egan-Jones | 9/10 | 3052 days | 52% |
| Sylvain Schiber | 9/10 | 3053 days | 52% |
| Sylvain Chanton | 10/10 | 3058 days | 52% |
| Julian Gury | 8/10 | 3066 days | 51% |
| R. Damen | 9/10 | 3083 days | 51% |
| Michelle Smit | 10/10 | 3144 days | 48% |
| Gesa Roemer | 8/10 | 3274 days | 41% |
| Anais Roux | 10/10 | 3279 days | 42% |
| Luca Staudt | 8/10 | 3298 days | 40% |
| Florian Bisault | 7/10 | 3299 days | 38% |
| Anna Jungclaus | 9/10 | 3306 days | 40% |
| Signe Broedbaek | 7/10 | 3308 days | 37% |
| Petra Fragner | 10/10 | 3314 days | 40% |
| Koehler Ute | 10/10 | 3326 days | 40% |
| Niclas Ullno | 8/10 | 3329 days | 39% |
| Tamara | 7/10 | 3330 days | 36% |
| Chloe Guerillot | 9/10 | 3340 days | 39% |
| Luisa and Hannes | 9/10 | 3353 days | 38% |
| elena salimzhanova | 10/10 | 3357 days | 38% |
| Jakub Trojanek | 8/10 | 3368 days | 37% |
| Malina | 10/10 | 3374 days | 38% |
| Emma Keegan | 7/10 | 3632 days | 23% |
| Emilie Normand | 7/10 | 3703 days | 20% |
| Christopher Buch Madsen | 8/10 | 4024 days | 7% |
| Phil Bromby | 9/10 | 4026 days | 7% |
| Tobias Thull | 7/10 | 4032 days | 5% |
| Rita Hochstiasser | 8/10 | 4054 days | 5% |
| Nelle Dutilleur | 10/10 | 4075 days | 5% |
| Mathias Butterlin | 8/10 | 4075 days | 4% |
| Daryl | 8/10 | 4083 days | 4% |
| Bert Pubeg | 9/10 | 4149 days | 1% |
| Alex | 8/10 | 4453 days | 14% |
| Lucie | 9/10 | 4489 days | 14% |
| Henzen | 9/10 | 4493 days | 14% |
| Roy Barton | 9/10 | 4756 days | 14% |
| Brian Livesey | 9/10 | 4764 days | 14% |
| Merlyn | 8/10 | 4772 days | 14% |
| Beyeler | 10/10 | 4776 days | 14% |
| Ralf Glaser | 7/10 | 4776 days | 13% |
| Suzanne van Kol | 8/10 | 4781 days | 14% |
| kiwifrenchy | 10/10 | 4788 days | 14% |
| _mel_ | 9/10 | 4819 days | 14% |
| C | 10/10 | 4819 days | 14% |
| Sarah and Soren | 10/10 | 4856 days | 14% |
| Erik Folkersen | 10/10 | 4864 days | 14% |
| Rudlinger | 10/10 | 4867 days | 14% |
| GenH | 10/10 | 5094 days | 14% |
| R Tearle | 10/10 | 5103 days | 14% |
| Franzi & Tobi | 10/10 | 5105 days | 14% |
| Nathalie | 10/10 | 5109 days | 14% |
| Ven | 9/10 | 5111 days | 14% |
| Jerven and Kim | 10/10 | 5118 days | 14% |
| Sarah Luijckx | 1/10 | 5120 days | 0% |
| Alan Jeffery | 7/10 | 5121 days | 13% |
| Birgette Weiner | 9/10 | 5139 days | 14% |
| Tim Van Nispen | 9/10 | 5141 days | 14% |
| Bottcher | 10/10 | 5141 days | 14% |
| Sue & Graham Mullin | 10/10 | 5148 days | 14% |
| John Simpson | 9/10 | 5150 days | 14% |
| Karen Phillips | 9/10 | 5150 days | 14% |
| Michelle Booty | 8/10 | 5152 days | 14% |
| Nadia Husain | 7/10 | 5153 days | 13% |
| Dietmar Gans | 10/10 | 5459 days | 14% |
| Matt Roper | 10/10 | 5481 days | 14% |
| Chris Glasg | 10/10 | 5498 days | 14% |
| Jamie Hallifax | 9/10 | 5509 days | 14% |
| Paul Ritchie | 10/10 | 5513 days | 14% |
| Gerry Donoghue | 10/10 | 5532 days | 14% |
| Yvonne German | 9/10 | 5535 days | 14% |
| DebbieM | 5/10 | 5549 days | 9% |
| mj111 | 10/10 | 5549 days | 14% |
| Susann Koschmeider | 10/10 | 5584 days | 14% |
| X Otte | 10/10 | 5588 days | 14% |
| Hans Hoff | 10/10 | 5588 days | 14% |
| Solveig Mosinski | 10/10 | 5592 days | 14% |
| Val and Barnie Weir | 10/10 | 5603 days | 14% |
| Wim Put | 9/10 | 5606 days | 14% |
| discerner | 10/10 | 5610 days | 14% |
| Phillip Reade | 10/10 | 5610 days | 14% |
| Tim Beuzeval | 9/10 | 5610 days | 14% |
| barp | 9/10 | 5641 days | 14% |
| Becky Fairweather | 10/10 | 5794 days | 14% |
| David | 10/10 | 5824 days | 14% |
| martinat | 10/10 | 5824 days | 14% |
| Mike | 9/10 | 5833 days | 14% |
| MichaelS1 | 9/10 | 5840 days | 14% |
| StefanieGermany | 9/10 | 5841 days | 14% |
| Veronika | 9/10 | 5843 days | 14% |
| Ralph Boese | 7/10 | 5844 days | 13% |
| ToyalFrance | 9/10 | 5844 days | 14% |
| ReneeA | 9/10 | 5872 days | 14% |
| Lorna | 8/10 | 5873 days | 14% |
| Bruce | 10/10 | 5874 days | 14% |
| Sandra | 10/10 | 5881 days | 14% |
| Heidi | 7/10 | 5888 days | 13% |
| Philipp | 9/10 | 5888 days | 14% |
| Simon | 9/10 | 5890 days | 14% |
| Kathryn | 8/10 | 5891 days | 14% |
| Barbara | 9/10 | 5896 days | 14% |
| Joachim | 10/10 | 5896 days | 14% |
| Ans | 7/10 | 5897 days | 13% |
| Minder | 10/10 | 5898 days | 14% |
| Evi | 7/10 | 5929 days | 13% |
| Ann Maree | 9/10 | 5932 days | 14% |
| Trine | 9/10 | 5942 days | 14% |
| Carina Korn | 10/10 | 6039 days | 14% |
| Christian | 7/10 | 6039 days | 13% |
| Nick | 10/10 | 6042 days | 14% |
| Terri Scott | 7/10 | 6059 days | 13% |
| Alan Bellerby | 10/10 | 6210 days | 14% |
| Robert | 4/10 | 6216 days | 6% |
| Elise | 10/10 | 6216 days | 14% |
| Fung | 8/10 | 6216 days | 14% |
| Peter Aston | 9/10 | 6216 days | 14% |
| Tony Wicks | 8/10 | 6221 days | 14% |
| Sue | 8/10 | 6228 days | 14% |
| Carla | 9/10 | 6236 days | 14% |
| Melissa Steedman | 9/10 | 6263 days | 14% |
| Vanessa Brennan | 7/10 | 6263 days | 13% |
| Tim | 9/10 | 6264 days | 14% |
| Mary | 10/10 | 6314 days | 14% |
| Agnes | 9/10 | 6530 days | 14% |
| Cohen | 9/10 | 6550 days | 14% |
| John | 8/10 | 6554 days | 14% |
| SueLinsk | 9/10 | 6554 days | 14% |
| Frauke | 7/10 | 6596 days | 13% |
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
-4.02% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 57 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 | -3.96% |
| 198 | -3.98% |
| 199 | -4.00% |
| 200 | -4.02% |
| 201 | -4.04% |
| 202 | -4.06% |
| 203 | -4.08% |
| … | … |
Balancing Adjustment
1.76% 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.