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 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.
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.
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.
89.35%
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 | 2029 days | 100% |
Amanda Walden | 10/10 | 2912 days | 59% |
Monique Pos | 9/10 | 3002 days | 54% |
Alison Egan-Jones | 9/10 | 3032 days | 53% |
Sylvain Schiber | 9/10 | 3033 days | 53% |
Sylvain Chanton | 10/10 | 3038 days | 53% |
Julian Gury | 8/10 | 3046 days | 51% |
R. Damen | 9/10 | 3063 days | 51% |
Michelle Smit | 10/10 | 3124 days | 49% |
Gesa Roemer | 8/10 | 3254 days | 42% |
Anais Roux | 10/10 | 3259 days | 43% |
Luca Staudt | 8/10 | 3278 days | 41% |
Florian Bisault | 7/10 | 3279 days | 38% |
Anna Jungclaus | 9/10 | 3286 days | 41% |
Signe Broedbaek | 7/10 | 3288 days | 38% |
Petra Fragner | 10/10 | 3294 days | 41% |
Koehler Ute | 10/10 | 3306 days | 40% |
Niclas Ullno | 8/10 | 3309 days | 39% |
Tamara | 7/10 | 3310 days | 37% |
Chloe Guerillot | 9/10 | 3320 days | 39% |
Luisa and Hannes | 9/10 | 3333 days | 39% |
elena salimzhanova | 10/10 | 3337 days | 39% |
Jakub Trojanek | 8/10 | 3348 days | 38% |
Malina | 10/10 | 3354 days | 38% |
Emma Keegan | 7/10 | 3612 days | 24% |
Emilie Normand | 7/10 | 3683 days | 21% |
Christopher Buch Madsen | 8/10 | 4004 days | 8% |
Phil Bromby | 9/10 | 4006 days | 8% |
Tobias Thull | 7/10 | 4012 days | 6% |
Rita Hochstiasser | 8/10 | 4034 days | 6% |
Nelle Dutilleur | 10/10 | 4055 days | 5% |
Mathias Butterlin | 8/10 | 4055 days | 5% |
Daryl | 8/10 | 4063 days | 5% |
Bert Pubeg | 9/10 | 4129 days | 2% |
Alex | 8/10 | 4433 days | 14% |
Lucie | 9/10 | 4469 days | 14% |
Henzen | 9/10 | 4473 days | 14% |
Roy Barton | 9/10 | 4736 days | 14% |
Brian Livesey | 9/10 | 4744 days | 14% |
Merlyn | 8/10 | 4752 days | 14% |
Beyeler | 10/10 | 4756 days | 14% |
Ralf Glaser | 7/10 | 4756 days | 13% |
Suzanne van Kol | 8/10 | 4761 days | 14% |
kiwifrenchy | 10/10 | 4768 days | 14% |
_mel_ | 9/10 | 4799 days | 14% |
C | 10/10 | 4799 days | 14% |
Sarah and Soren | 10/10 | 4836 days | 14% |
Erik Folkersen | 10/10 | 4844 days | 14% |
Rudlinger | 10/10 | 4847 days | 14% |
GenH | 10/10 | 5074 days | 14% |
R Tearle | 10/10 | 5083 days | 14% |
Franzi & Tobi | 10/10 | 5085 days | 14% |
Nathalie | 10/10 | 5089 days | 14% |
Ven | 9/10 | 5091 days | 14% |
Jerven and Kim | 10/10 | 5098 days | 14% |
Sarah Luijckx | 1/10 | 5100 days | 0% |
Alan Jeffery | 7/10 | 5101 days | 13% |
Birgette Weiner | 9/10 | 5119 days | 14% |
Tim Van Nispen | 9/10 | 5121 days | 14% |
Bottcher | 10/10 | 5121 days | 14% |
Sue & Graham Mullin | 10/10 | 5128 days | 14% |
John Simpson | 9/10 | 5130 days | 14% |
Karen Phillips | 9/10 | 5130 days | 14% |
Michelle Booty | 8/10 | 5132 days | 14% |
Nadia Husain | 7/10 | 5133 days | 13% |
Dietmar Gans | 10/10 | 5439 days | 14% |
Matt Roper | 10/10 | 5461 days | 14% |
Chris Glasg | 10/10 | 5478 days | 14% |
Jamie Hallifax | 9/10 | 5489 days | 14% |
Paul Ritchie | 10/10 | 5493 days | 14% |
Gerry Donoghue | 10/10 | 5512 days | 14% |
Yvonne German | 9/10 | 5515 days | 14% |
DebbieM | 5/10 | 5529 days | 8% |
mj111 | 10/10 | 5529 days | 14% |
Susann Koschmeider | 10/10 | 5564 days | 14% |
X Otte | 10/10 | 5568 days | 14% |
Hans Hoff | 10/10 | 5568 days | 14% |
Solveig Mosinski | 10/10 | 5572 days | 14% |
Val and Barnie Weir | 10/10 | 5583 days | 14% |
Wim Put | 9/10 | 5586 days | 14% |
discerner | 10/10 | 5590 days | 14% |
Phillip Reade | 10/10 | 5590 days | 14% |
Tim Beuzeval | 9/10 | 5590 days | 14% |
barp | 9/10 | 5621 days | 14% |
Becky Fairweather | 10/10 | 5774 days | 14% |
David | 10/10 | 5804 days | 14% |
martinat | 10/10 | 5804 days | 14% |
Mike | 9/10 | 5813 days | 14% |
MichaelS1 | 9/10 | 5820 days | 14% |
StefanieGermany | 9/10 | 5821 days | 14% |
Veronika | 9/10 | 5823 days | 14% |
Ralph Boese | 7/10 | 5824 days | 13% |
ToyalFrance | 9/10 | 5824 days | 14% |
ReneeA | 9/10 | 5852 days | 14% |
Lorna | 8/10 | 5853 days | 14% |
Bruce | 10/10 | 5854 days | 14% |
Sandra | 10/10 | 5861 days | 14% |
Heidi | 7/10 | 5868 days | 13% |
Philipp | 9/10 | 5868 days | 14% |
Simon | 9/10 | 5870 days | 14% |
Kathryn | 8/10 | 5871 days | 14% |
Barbara | 9/10 | 5876 days | 14% |
Joachim | 10/10 | 5876 days | 14% |
Ans | 7/10 | 5877 days | 13% |
Minder | 10/10 | 5878 days | 14% |
Evi | 7/10 | 5909 days | 13% |
Ann Maree | 9/10 | 5912 days | 14% |
Trine | 9/10 | 5922 days | 14% |
Carina Korn | 10/10 | 6019 days | 14% |
Christian | 7/10 | 6019 days | 13% |
Nick | 10/10 | 6022 days | 14% |
Terri Scott | 7/10 | 6039 days | 13% |
Alan Bellerby | 10/10 | 6190 days | 14% |
Robert | 4/10 | 6196 days | 6% |
Elise | 10/10 | 6196 days | 14% |
Fung | 8/10 | 6196 days | 14% |
Peter Aston | 9/10 | 6196 days | 14% |
Tony Wicks | 8/10 | 6201 days | 14% |
Sue | 8/10 | 6208 days | 14% |
Carla | 9/10 | 6216 days | 14% |
Melissa Steedman | 9/10 | 6243 days | 14% |
Vanessa Brennan | 7/10 | 6243 days | 13% |
Tim | 9/10 | 6244 days | 14% |
Mary | 10/10 | 6294 days | 14% |
Agnes | 9/10 | 6510 days | 14% |
Cohen | 9/10 | 6530 days | 14% |
John | 8/10 | 6534 days | 14% |
SueLinsk | 9/10 | 6534 days | 14% |
Frauke | 7/10 | 6576 days | 13% |
Several adjustments to the weighted average are added to improve relevancy and credibility. These adjustments apply equally to all experiences that meet the criteria.
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.
-4.14% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 53 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 | -4.08% |
198 | -4.10% |
199 | -4.12% |
200 | -4.14% |
201 | -4.16% |
202 | -4.19% |
203 | -4.21% |
… | … |
1.78% 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.
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.