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
89.33%
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 | 2009 days | 100% |
| Amanda Walden | 10/10 | 2892 days | 59% |
| Monique Pos | 9/10 | 2982 days | 54% |
| Alison Egan-Jones | 9/10 | 3012 days | 53% |
| Sylvain Schiber | 9/10 | 3013 days | 53% |
| Sylvain Chanton | 10/10 | 3018 days | 53% |
| Julian Gury | 8/10 | 3026 days | 52% |
| R. Damen | 9/10 | 3043 days | 52% |
| Michelle Smit | 10/10 | 3104 days | 49% |
| Gesa Roemer | 8/10 | 3234 days | 42% |
| Anais Roux | 10/10 | 3239 days | 43% |
| Luca Staudt | 8/10 | 3258 days | 41% |
| Florian Bisault | 7/10 | 3259 days | 39% |
| Anna Jungclaus | 9/10 | 3266 days | 41% |
| Signe Broedbaek | 7/10 | 3268 days | 38% |
| Petra Fragner | 10/10 | 3274 days | 42% |
| Koehler Ute | 10/10 | 3286 days | 41% |
| Niclas Ullno | 8/10 | 3289 days | 40% |
| Tamara | 7/10 | 3290 days | 37% |
| Chloe Guerillot | 9/10 | 3300 days | 40% |
| Luisa and Hannes | 9/10 | 3313 days | 39% |
| elena salimzhanova | 10/10 | 3317 days | 40% |
| Jakub Trojanek | 8/10 | 3328 days | 38% |
| Malina | 10/10 | 3334 days | 39% |
| Emma Keegan | 7/10 | 3592 days | 24% |
| Emilie Normand | 7/10 | 3663 days | 21% |
| Christopher Buch Madsen | 8/10 | 3984 days | 8% |
| Phil Bromby | 9/10 | 3986 days | 8% |
| Tobias Thull | 7/10 | 3992 days | 7% |
| Rita Hochstiasser | 8/10 | 4014 days | 7% |
| Nelle Dutilleur | 10/10 | 4035 days | 6% |
| Mathias Butterlin | 8/10 | 4035 days | 6% |
| Daryl | 8/10 | 4043 days | 6% |
| Bert Pubeg | 9/10 | 4109 days | 3% |
| Alex | 8/10 | 4413 days | 14% |
| Lucie | 9/10 | 4449 days | 14% |
| Henzen | 9/10 | 4453 days | 14% |
| Roy Barton | 9/10 | 4716 days | 14% |
| Brian Livesey | 9/10 | 4724 days | 14% |
| Merlyn | 8/10 | 4732 days | 14% |
| Beyeler | 10/10 | 4736 days | 14% |
| Ralf Glaser | 7/10 | 4736 days | 12% |
| Suzanne van Kol | 8/10 | 4741 days | 14% |
| kiwifrenchy | 10/10 | 4748 days | 14% |
| _mel_ | 9/10 | 4779 days | 14% |
| C | 10/10 | 4779 days | 14% |
| Sarah and Soren | 10/10 | 4816 days | 14% |
| Erik Folkersen | 10/10 | 4824 days | 14% |
| Rudlinger | 10/10 | 4827 days | 14% |
| GenH | 10/10 | 5054 days | 14% |
| R Tearle | 10/10 | 5063 days | 14% |
| Franzi & Tobi | 10/10 | 5065 days | 14% |
| Nathalie | 10/10 | 5069 days | 14% |
| Ven | 9/10 | 5071 days | 14% |
| Jerven and Kim | 10/10 | 5078 days | 14% |
| Sarah Luijckx | 1/10 | 5080 days | 0% |
| Alan Jeffery | 7/10 | 5081 days | 12% |
| Birgette Weiner | 9/10 | 5099 days | 14% |
| Tim Van Nispen | 9/10 | 5101 days | 14% |
| Bottcher | 10/10 | 5101 days | 14% |
| Sue & Graham Mullin | 10/10 | 5108 days | 14% |
| John Simpson | 9/10 | 5110 days | 14% |
| Karen Phillips | 9/10 | 5110 days | 14% |
| Michelle Booty | 8/10 | 5112 days | 14% |
| Nadia Husain | 7/10 | 5113 days | 12% |
| Dietmar Gans | 10/10 | 5419 days | 14% |
| Matt Roper | 10/10 | 5441 days | 14% |
| Chris Glasg | 10/10 | 5458 days | 14% |
| Jamie Hallifax | 9/10 | 5469 days | 14% |
| Paul Ritchie | 10/10 | 5473 days | 14% |
| Gerry Donoghue | 10/10 | 5492 days | 14% |
| Yvonne German | 9/10 | 5495 days | 14% |
| DebbieM | 5/10 | 5509 days | 8% |
| mj111 | 10/10 | 5509 days | 14% |
| Susann Koschmeider | 10/10 | 5544 days | 14% |
| X Otte | 10/10 | 5548 days | 14% |
| Hans Hoff | 10/10 | 5548 days | 14% |
| Solveig Mosinski | 10/10 | 5552 days | 14% |
| Val and Barnie Weir | 10/10 | 5563 days | 14% |
| Wim Put | 9/10 | 5566 days | 14% |
| discerner | 10/10 | 5570 days | 14% |
| Phillip Reade | 10/10 | 5570 days | 14% |
| Tim Beuzeval | 9/10 | 5570 days | 14% |
| barp | 9/10 | 5601 days | 14% |
| Becky Fairweather | 10/10 | 5754 days | 14% |
| David | 10/10 | 5784 days | 14% |
| martinat | 10/10 | 5784 days | 14% |
| Mike | 9/10 | 5793 days | 14% |
| MichaelS1 | 9/10 | 5800 days | 14% |
| StefanieGermany | 9/10 | 5801 days | 14% |
| Veronika | 9/10 | 5803 days | 14% |
| Ralph Boese | 7/10 | 5804 days | 12% |
| ToyalFrance | 9/10 | 5804 days | 14% |
| ReneeA | 9/10 | 5832 days | 14% |
| Lorna | 8/10 | 5833 days | 14% |
| Bruce | 10/10 | 5834 days | 14% |
| Sandra | 10/10 | 5841 days | 14% |
| Heidi | 7/10 | 5848 days | 12% |
| Philipp | 9/10 | 5848 days | 14% |
| Simon | 9/10 | 5850 days | 14% |
| Kathryn | 8/10 | 5851 days | 14% |
| Barbara | 9/10 | 5856 days | 14% |
| Joachim | 10/10 | 5856 days | 14% |
| Ans | 7/10 | 5857 days | 12% |
| Minder | 10/10 | 5858 days | 14% |
| Evi | 7/10 | 5889 days | 12% |
| Ann Maree | 9/10 | 5892 days | 14% |
| Trine | 9/10 | 5902 days | 14% |
| Carina Korn | 10/10 | 6000 days | 14% |
| Christian | 7/10 | 6000 days | 12% |
| Nick | 10/10 | 6002 days | 14% |
| Terri Scott | 7/10 | 6019 days | 12% |
| Alan Bellerby | 10/10 | 6170 days | 14% |
| Robert | 4/10 | 6176 days | 6% |
| Elise | 10/10 | 6176 days | 14% |
| Fung | 8/10 | 6176 days | 14% |
| Peter Aston | 9/10 | 6176 days | 14% |
| Tony Wicks | 8/10 | 6181 days | 14% |
| Sue | 8/10 | 6188 days | 14% |
| Carla | 9/10 | 6196 days | 14% |
| Melissa Steedman | 9/10 | 6223 days | 14% |
| Vanessa Brennan | 7/10 | 6223 days | 12% |
| Tim | 9/10 | 6224 days | 14% |
| Mary | 10/10 | 6274 days | 14% |
| Agnes | 9/10 | 6490 days | 14% |
| Cohen | 9/10 | 6510 days | 14% |
| John | 8/10 | 6514 days | 14% |
| SueLinsk | 9/10 | 6514 days | 14% |
| Frauke | 7/10 | 6556 days | 12% |
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
-4.14% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 49 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 | -4.18% |
| 203 | -4.20% |
| … | … |
Balancing Adjustment
1.79% 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.