G'day, 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
89.65%
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 |
|---|---|---|---|
| Matthew Mutimer | 10/10 | 2354 days | 100% |
| Amanda Walden | 10/10 | 3237 days | 56% |
| Monique Pos | 9/10 | 3327 days | 51% |
| Alison Egan-Jones | 9/10 | 3357 days | 49% |
| Sylvain Schiber | 9/10 | 3358 days | 49% |
| Sylvain Chanton | 10/10 | 3363 days | 50% |
| Julian Gury | 8/10 | 3371 days | 48% |
| R. Damen | 9/10 | 3388 days | 48% |
| Michelle Smit | 10/10 | 3449 days | 45% |
| Gesa Roemer | 8/10 | 3579 days | 38% |
| Anais Roux | 10/10 | 3584 days | 39% |
| Luca Staudt | 8/10 | 3603 days | 37% |
| Florian Bisault | 7/10 | 3604 days | 35% |
| Anna Jungclaus | 9/10 | 3611 days | 37% |
| Signe Broedbaek | 7/10 | 3613 days | 35% |
| Petra Fragner | 10/10 | 3619 days | 37% |
| Koehler Ute | 10/10 | 3631 days | 36% |
| Niclas Ullno | 8/10 | 3634 days | 35% |
| Tamara | 7/10 | 3635 days | 34% |
| Chloe Guerillot | 9/10 | 3645 days | 35% |
| Luisa and Hannes | 9/10 | 3658 days | 35% |
| elena salimzhanova | 10/10 | 3662 days | 35% |
| Jakub Trojanek | 8/10 | 3673 days | 34% |
| Malina | 10/10 | 3679 days | 34% |
| Emma Keegan | 7/10 | 3937 days | 20% |
| Emilie Normand | 7/10 | 4008 days | 16% |
| Christopher Buch Madsen | 8/10 | 4329 days | 1% |
| Phil Bromby | 9/10 | 4331 days | 1% |
| Tobias Thull | 7/10 | 4337 days | 1% |
| Rita Hochstiasser | 8/10 | 4359 days | 0% |
| Nelle Dutilleur | 10/10 | 4380 days | 24% |
| Mathias Butterlin | 8/10 | 4380 days | 24% |
| Daryl | 8/10 | 4388 days | 24% |
| Bert Pubeg | 9/10 | 4454 days | 24% |
| Alex | 8/10 | 4758 days | 24% |
| Lucie | 9/10 | 4794 days | 24% |
| Henzen | 9/10 | 4798 days | 24% |
| Roy Barton | 9/10 | 5061 days | 24% |
| Brian Livesey | 9/10 | 5069 days | 24% |
| Merlyn | 8/10 | 5077 days | 24% |
| Beyeler | 10/10 | 5081 days | 24% |
| Ralf Glaser | 7/10 | 5081 days | 23% |
| Suzanne van Kol | 8/10 | 5086 days | 24% |
| kiwifrenchy | 10/10 | 5093 days | 24% |
| _mel_ | 9/10 | 5124 days | 24% |
| C | 10/10 | 5124 days | 24% |
| Sarah and Soren | 10/10 | 5161 days | 24% |
| Erik Folkersen | 10/10 | 5169 days | 24% |
| Rudlinger | 10/10 | 5172 days | 24% |
| GenH | 10/10 | 5399 days | 24% |
| R Tearle | 10/10 | 5408 days | 24% |
| Franzi & Tobi | 10/10 | 5410 days | 24% |
| Nathalie | 10/10 | 5414 days | 24% |
| Ven | 9/10 | 5416 days | 24% |
| Jerven and Kim | 10/10 | 5423 days | 24% |
| Sarah Luijckx | 1/10 | 5425 days | 9% |
| Alan Jeffery | 7/10 | 5426 days | 23% |
| Birgette Weiner | 9/10 | 5444 days | 24% |
| Tim Van Nispen | 9/10 | 5446 days | 24% |
| Bottcher | 10/10 | 5446 days | 24% |
| Sue & Graham Mullin | 10/10 | 5453 days | 24% |
| John Simpson | 9/10 | 5455 days | 24% |
| Karen Phillips | 9/10 | 5455 days | 24% |
| Michelle Booty | 8/10 | 5457 days | 24% |
| Nadia Husain | 7/10 | 5458 days | 23% |
| Dietmar Gans | 10/10 | 5764 days | 24% |
| Matt Roper | 10/10 | 5786 days | 24% |
| Chris Glasg | 10/10 | 5803 days | 24% |
| Jamie Hallifax | 9/10 | 5814 days | 24% |
| Paul Ritchie | 10/10 | 5818 days | 24% |
| Gerry Donoghue | 10/10 | 5837 days | 24% |
| Yvonne German | 9/10 | 5840 days | 24% |
| DebbieM | 5/10 | 5854 days | 18% |
| mj111 | 10/10 | 5854 days | 24% |
| Susann Koschmeider | 10/10 | 5889 days | 24% |
| X Otte | 10/10 | 5893 days | 24% |
| Hans Hoff | 10/10 | 5893 days | 24% |
| Solveig Mosinski | 10/10 | 5897 days | 24% |
| Val and Barnie Weir | 10/10 | 5908 days | 24% |
| Wim Put | 9/10 | 5911 days | 24% |
| discerner | 10/10 | 5915 days | 24% |
| Phillip Reade | 10/10 | 5915 days | 24% |
| Tim Beuzeval | 9/10 | 5915 days | 24% |
| barp | 9/10 | 5946 days | 24% |
| Becky Fairweather | 10/10 | 6099 days | 24% |
| David | 10/10 | 6129 days | 24% |
| martinat | 10/10 | 6129 days | 24% |
| Mike | 9/10 | 6138 days | 24% |
| MichaelS1 | 9/10 | 6145 days | 24% |
| StefanieGermany | 9/10 | 6146 days | 24% |
| Veronika | 9/10 | 6148 days | 24% |
| Ralph Boese | 7/10 | 6149 days | 23% |
| ToyalFrance | 9/10 | 6149 days | 24% |
| ReneeA | 9/10 | 6177 days | 24% |
| Lorna | 8/10 | 6178 days | 24% |
| Bruce | 10/10 | 6179 days | 24% |
| Sandra | 10/10 | 6186 days | 24% |
| Heidi | 7/10 | 6193 days | 23% |
| Philipp | 9/10 | 6193 days | 24% |
| Simon | 9/10 | 6195 days | 24% |
| Kathryn | 8/10 | 6196 days | 24% |
| Barbara | 9/10 | 6201 days | 24% |
| Joachim | 10/10 | 6201 days | 24% |
| Ans | 7/10 | 6202 days | 23% |
| Minder | 10/10 | 6203 days | 24% |
| Evi | 7/10 | 6234 days | 23% |
| Ann Maree | 9/10 | 6237 days | 24% |
| Trine | 9/10 | 6247 days | 24% |
| Carina Korn | 10/10 | 6344 days | 24% |
| Christian | 7/10 | 6344 days | 23% |
| Nick | 10/10 | 6347 days | 24% |
| Terri Scott | 7/10 | 6364 days | 23% |
| Alan Bellerby | 10/10 | 6515 days | 24% |
| Robert | 4/10 | 6521 days | 16% |
| Elise | 10/10 | 6521 days | 24% |
| Fung | 8/10 | 6521 days | 24% |
| Peter Aston | 9/10 | 6521 days | 24% |
| Tony Wicks | 8/10 | 6526 days | 24% |
| Sue | 8/10 | 6533 days | 24% |
| Carla | 9/10 | 6541 days | 24% |
| Melissa Steedman | 9/10 | 6568 days | 24% |
| Vanessa Brennan | 7/10 | 6568 days | 23% |
| Tim | 9/10 | 6569 days | 24% |
| Mary | 10/10 | 6619 days | 24% |
| Agnes | 9/10 | 6835 days | 24% |
| Cohen | 9/10 | 6855 days | 24% |
| John | 8/10 | 6859 days | 24% |
| SueLinsk | 9/10 | 6859 days | 24% |
| Frauke | 7/10 | 6901 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
-4.06% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 44 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 | -4.00% |
| 198 | -4.02% |
| 199 | -4.04% |
| 200 | -4.06% |
| 201 | -4.08% |
| 202 | -4.10% |
| 203 | -4.12% |
| … | … |
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.