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
89.56%
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 | 2616 days | 100% |
| Amanda Walden | 10/10 | 3499 days | 47% |
| Monique Pos | 9/10 | 3589 days | 41% |
| Alison Egan-Jones | 9/10 | 3619 days | 39% |
| Sylvain Schiber | 9/10 | 3620 days | 39% |
| Sylvain Chanton | 10/10 | 3625 days | 39% |
| Julian Gury | 8/10 | 3633 days | 38% |
| R. Damen | 9/10 | 3650 days | 37% |
| Michelle Smit | 10/10 | 3711 days | 34% |
| Gesa Roemer | 8/10 | 3841 days | 26% |
| Anais Roux | 10/10 | 3846 days | 26% |
| Luca Staudt | 8/10 | 3865 days | 24% |
| Florian Bisault | 7/10 | 3866 days | 23% |
| Anna Jungclaus | 9/10 | 3873 days | 24% |
| Signe Broedbaek | 7/10 | 3875 days | 22% |
| Petra Fragner | 10/10 | 3881 days | 24% |
| Koehler Ute | 10/10 | 3893 days | 23% |
| Niclas Ullno | 8/10 | 3896 days | 22% |
| Tamara | 7/10 | 3897 days | 21% |
| Chloe Guerillot | 9/10 | 3907 days | 22% |
| Luisa and Hannes | 9/10 | 3920 days | 21% |
| elena salimzhanova | 10/10 | 3924 days | 21% |
| Jakub Trojanek | 8/10 | 3935 days | 20% |
| Malina | 10/10 | 3941 days | 20% |
| Emma Keegan | 7/10 | 4199 days | 4% |
| Emilie Normand | 7/10 | 4270 days | 0% |
| Christopher Buch Madsen | 8/10 | 4591 days | 24% |
| Phil Bromby | 9/10 | 4593 days | 24% |
| Tobias Thull | 7/10 | 4599 days | 22% |
| Rita Hochstiasser | 8/10 | 4621 days | 24% |
| Nelle Dutilleur | 10/10 | 4642 days | 25% |
| Mathias Butterlin | 8/10 | 4642 days | 24% |
| Daryl | 8/10 | 4650 days | 24% |
| Bert Pubeg | 9/10 | 4716 days | 24% |
| Alex | 8/10 | 5020 days | 24% |
| Lucie | 9/10 | 5056 days | 24% |
| Henzen | 9/10 | 5060 days | 24% |
| Roy Barton | 9/10 | 5323 days | 24% |
| Brian Livesey | 9/10 | 5331 days | 24% |
| Merlyn | 8/10 | 5339 days | 24% |
| Beyeler | 10/10 | 5343 days | 25% |
| Ralf Glaser | 7/10 | 5343 days | 22% |
| Suzanne van Kol | 8/10 | 5348 days | 24% |
| kiwifrenchy | 10/10 | 5355 days | 25% |
| _mel_ | 9/10 | 5386 days | 24% |
| C | 10/10 | 5386 days | 25% |
| Sarah and Soren | 10/10 | 5423 days | 25% |
| Erik Folkersen | 10/10 | 5431 days | 25% |
| Rudlinger | 10/10 | 5434 days | 25% |
| GenH | 10/10 | 5661 days | 25% |
| R Tearle | 10/10 | 5670 days | 25% |
| Franzi & Tobi | 10/10 | 5672 days | 25% |
| Nathalie | 10/10 | 5676 days | 25% |
| Ven | 9/10 | 5678 days | 24% |
| Jerven and Kim | 10/10 | 5685 days | 25% |
| Sarah Luijckx | 1/10 | 5687 days | 6% |
| Alan Jeffery | 7/10 | 5688 days | 22% |
| Birgette Weiner | 9/10 | 5706 days | 24% |
| Tim Van Nispen | 9/10 | 5708 days | 24% |
| Bottcher | 10/10 | 5708 days | 25% |
| Sue & Graham Mullin | 10/10 | 5715 days | 25% |
| John Simpson | 9/10 | 5717 days | 24% |
| Karen Phillips | 9/10 | 5717 days | 24% |
| Michelle Booty | 8/10 | 5719 days | 24% |
| Nadia Husain | 7/10 | 5720 days | 22% |
| Dietmar Gans | 10/10 | 6026 days | 25% |
| Matt Roper | 10/10 | 6048 days | 25% |
| Chris Glasg | 10/10 | 6065 days | 25% |
| Jamie Hallifax | 9/10 | 6076 days | 24% |
| Paul Ritchie | 10/10 | 6080 days | 25% |
| Gerry Donoghue | 10/10 | 6099 days | 25% |
| Yvonne German | 9/10 | 6102 days | 24% |
| DebbieM | 5/10 | 6116 days | 17% |
| mj111 | 10/10 | 6116 days | 25% |
| Susann Koschmeider | 10/10 | 6151 days | 25% |
| X Otte | 10/10 | 6155 days | 25% |
| Hans Hoff | 10/10 | 6155 days | 25% |
| Solveig Mosinski | 10/10 | 6159 days | 25% |
| Val and Barnie Weir | 10/10 | 6170 days | 25% |
| Wim Put | 9/10 | 6173 days | 24% |
| discerner | 10/10 | 6177 days | 25% |
| Phillip Reade | 10/10 | 6177 days | 25% |
| Tim Beuzeval | 9/10 | 6177 days | 24% |
| barp | 9/10 | 6208 days | 24% |
| Becky Fairweather | 10/10 | 6361 days | 25% |
| David | 10/10 | 6391 days | 25% |
| martinat | 10/10 | 6391 days | 25% |
| Mike | 9/10 | 6400 days | 24% |
| MichaelS1 | 9/10 | 6407 days | 24% |
| StefanieGermany | 9/10 | 6408 days | 24% |
| Veronika | 9/10 | 6410 days | 24% |
| Ralph Boese | 7/10 | 6411 days | 22% |
| ToyalFrance | 9/10 | 6411 days | 24% |
| ReneeA | 9/10 | 6439 days | 24% |
| Lorna | 8/10 | 6440 days | 24% |
| Bruce | 10/10 | 6441 days | 25% |
| Sandra | 10/10 | 6448 days | 25% |
| Heidi | 7/10 | 6455 days | 22% |
| Philipp | 9/10 | 6455 days | 24% |
| Simon | 9/10 | 6457 days | 24% |
| Kathryn | 8/10 | 6458 days | 24% |
| Barbara | 9/10 | 6463 days | 24% |
| Joachim | 10/10 | 6463 days | 25% |
| Ans | 7/10 | 6464 days | 22% |
| Minder | 10/10 | 6465 days | 25% |
| Evi | 7/10 | 6496 days | 22% |
| Ann Maree | 9/10 | 6499 days | 24% |
| Trine | 9/10 | 6509 days | 24% |
| Carina Korn | 10/10 | 6606 days | 25% |
| Christian | 7/10 | 6606 days | 22% |
| Nick | 10/10 | 6609 days | 25% |
| Terri Scott | 7/10 | 6626 days | 22% |
| Alan Bellerby | 10/10 | 6777 days | 25% |
| Robert | 4/10 | 6783 days | 14% |
| Elise | 10/10 | 6783 days | 25% |
| Fung | 8/10 | 6783 days | 24% |
| Peter Aston | 9/10 | 6783 days | 24% |
| Tony Wicks | 8/10 | 6788 days | 24% |
| Sue | 8/10 | 6795 days | 24% |
| Carla | 9/10 | 6803 days | 24% |
| Melissa Steedman | 9/10 | 6830 days | 24% |
| Vanessa Brennan | 7/10 | 6830 days | 22% |
| Tim | 9/10 | 6831 days | 24% |
| Mary | 10/10 | 6881 days | 25% |
| Agnes | 9/10 | 7097 days | 24% |
| Cohen | 9/10 | 7117 days | 24% |
| John | 8/10 | 7121 days | 24% |
| SueLinsk | 9/10 | 7121 days | 24% |
| Frauke | 7/10 | 7163 days | 22% |
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
-3.25% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 68 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 | -3.20% |
| 198 | -3.22% |
| 199 | -3.23% |
| 200 | -3.25% |
| 201 | -3.27% |
| 202 | -3.28% |
| 203 | -3.30% |
| … | … |
Balancing Adjustment
1.58% 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
88%
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.