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
89.57%
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 | 2636 days | 100% |
| Amanda Walden | 10/10 | 3519 days | 47% |
| Monique Pos | 9/10 | 3609 days | 41% |
| Alison Egan-Jones | 9/10 | 3639 days | 39% |
| Sylvain Schiber | 9/10 | 3640 days | 39% |
| Sylvain Chanton | 10/10 | 3645 days | 39% |
| Julian Gury | 8/10 | 3653 days | 38% |
| R. Damen | 9/10 | 3670 days | 37% |
| Michelle Smit | 10/10 | 3731 days | 34% |
| Gesa Roemer | 8/10 | 3861 days | 26% |
| Anais Roux | 10/10 | 3866 days | 26% |
| Luca Staudt | 8/10 | 3885 days | 24% |
| Florian Bisault | 7/10 | 3886 days | 23% |
| Anna Jungclaus | 9/10 | 3893 days | 24% |
| Signe Broedbaek | 7/10 | 3895 days | 22% |
| Petra Fragner | 10/10 | 3901 days | 24% |
| Koehler Ute | 10/10 | 3913 days | 23% |
| Niclas Ullno | 8/10 | 3916 days | 22% |
| Tamara | 7/10 | 3917 days | 21% |
| Chloe Guerillot | 9/10 | 3927 days | 22% |
| Luisa and Hannes | 9/10 | 3940 days | 21% |
| elena salimzhanova | 10/10 | 3944 days | 21% |
| Jakub Trojanek | 8/10 | 3955 days | 20% |
| Malina | 10/10 | 3961 days | 20% |
| Emma Keegan | 7/10 | 4219 days | 4% |
| Emilie Normand | 7/10 | 4290 days | 0% |
| Christopher Buch Madsen | 8/10 | 4611 days | 25% |
| Phil Bromby | 9/10 | 4613 days | 25% |
| Tobias Thull | 7/10 | 4619 days | 24% |
| Rita Hochstiasser | 8/10 | 4641 days | 25% |
| Nelle Dutilleur | 10/10 | 4662 days | 26% |
| Mathias Butterlin | 8/10 | 4662 days | 25% |
| Daryl | 8/10 | 4670 days | 25% |
| Bert Pubeg | 9/10 | 4736 days | 25% |
| Alex | 8/10 | 5040 days | 25% |
| Lucie | 9/10 | 5076 days | 25% |
| Henzen | 9/10 | 5080 days | 25% |
| Roy Barton | 9/10 | 5343 days | 25% |
| Brian Livesey | 9/10 | 5351 days | 25% |
| Merlyn | 8/10 | 5359 days | 25% |
| Beyeler | 10/10 | 5363 days | 26% |
| Ralf Glaser | 7/10 | 5363 days | 24% |
| Suzanne van Kol | 8/10 | 5368 days | 25% |
| kiwifrenchy | 10/10 | 5375 days | 26% |
| _mel_ | 9/10 | 5406 days | 25% |
| C | 10/10 | 5406 days | 26% |
| Sarah and Soren | 10/10 | 5443 days | 26% |
| Erik Folkersen | 10/10 | 5451 days | 26% |
| Rudlinger | 10/10 | 5454 days | 26% |
| GenH | 10/10 | 5681 days | 26% |
| R Tearle | 10/10 | 5690 days | 26% |
| Franzi & Tobi | 10/10 | 5692 days | 26% |
| Nathalie | 10/10 | 5696 days | 26% |
| Ven | 9/10 | 5698 days | 25% |
| Jerven and Kim | 10/10 | 5705 days | 26% |
| Sarah Luijckx | 1/10 | 5707 days | 7% |
| Alan Jeffery | 7/10 | 5708 days | 24% |
| Birgette Weiner | 9/10 | 5726 days | 25% |
| Tim Van Nispen | 9/10 | 5728 days | 25% |
| Bottcher | 10/10 | 5728 days | 26% |
| Sue & Graham Mullin | 10/10 | 5735 days | 26% |
| John Simpson | 9/10 | 5737 days | 25% |
| Karen Phillips | 9/10 | 5737 days | 25% |
| Michelle Booty | 8/10 | 5739 days | 25% |
| Nadia Husain | 7/10 | 5740 days | 24% |
| Dietmar Gans | 10/10 | 6046 days | 26% |
| Matt Roper | 10/10 | 6068 days | 26% |
| Chris Glasg | 10/10 | 6085 days | 26% |
| Jamie Hallifax | 9/10 | 6096 days | 25% |
| Paul Ritchie | 10/10 | 6100 days | 26% |
| Gerry Donoghue | 10/10 | 6119 days | 26% |
| Yvonne German | 9/10 | 6122 days | 25% |
| DebbieM | 5/10 | 6136 days | 18% |
| mj111 | 10/10 | 6136 days | 26% |
| Susann Koschmeider | 10/10 | 6171 days | 26% |
| X Otte | 10/10 | 6175 days | 26% |
| Hans Hoff | 10/10 | 6175 days | 26% |
| Solveig Mosinski | 10/10 | 6179 days | 26% |
| Val and Barnie Weir | 10/10 | 6190 days | 26% |
| Wim Put | 9/10 | 6193 days | 25% |
| discerner | 10/10 | 6197 days | 26% |
| Phillip Reade | 10/10 | 6197 days | 26% |
| Tim Beuzeval | 9/10 | 6197 days | 25% |
| barp | 9/10 | 6228 days | 25% |
| Becky Fairweather | 10/10 | 6381 days | 26% |
| David | 10/10 | 6411 days | 26% |
| martinat | 10/10 | 6411 days | 26% |
| Mike | 9/10 | 6420 days | 25% |
| MichaelS1 | 9/10 | 6427 days | 25% |
| StefanieGermany | 9/10 | 6428 days | 25% |
| Veronika | 9/10 | 6430 days | 25% |
| Ralph Boese | 7/10 | 6431 days | 24% |
| ToyalFrance | 9/10 | 6431 days | 25% |
| ReneeA | 9/10 | 6459 days | 25% |
| Lorna | 8/10 | 6460 days | 25% |
| Bruce | 10/10 | 6461 days | 26% |
| Sandra | 10/10 | 6468 days | 26% |
| Heidi | 7/10 | 6475 days | 24% |
| Philipp | 9/10 | 6475 days | 25% |
| Simon | 9/10 | 6477 days | 25% |
| Kathryn | 8/10 | 6478 days | 25% |
| Barbara | 9/10 | 6483 days | 25% |
| Joachim | 10/10 | 6483 days | 26% |
| Ans | 7/10 | 6484 days | 24% |
| Minder | 10/10 | 6485 days | 26% |
| Evi | 7/10 | 6516 days | 24% |
| Ann Maree | 9/10 | 6519 days | 25% |
| Trine | 9/10 | 6529 days | 25% |
| Carina Korn | 10/10 | 6627 days | 26% |
| Christian | 7/10 | 6627 days | 24% |
| Nick | 10/10 | 6629 days | 26% |
| Terri Scott | 7/10 | 6646 days | 24% |
| Alan Bellerby | 10/10 | 6797 days | 26% |
| Robert | 4/10 | 6803 days | 15% |
| Elise | 10/10 | 6803 days | 26% |
| Fung | 8/10 | 6803 days | 25% |
| Peter Aston | 9/10 | 6803 days | 25% |
| Tony Wicks | 8/10 | 6808 days | 25% |
| Sue | 8/10 | 6815 days | 25% |
| Carla | 9/10 | 6823 days | 25% |
| Melissa Steedman | 9/10 | 6850 days | 25% |
| Vanessa Brennan | 7/10 | 6850 days | 24% |
| Tim | 9/10 | 6851 days | 25% |
| Mary | 10/10 | 6901 days | 26% |
| Agnes | 9/10 | 7117 days | 25% |
| Cohen | 9/10 | 7137 days | 25% |
| John | 8/10 | 7141 days | 25% |
| SueLinsk | 9/10 | 7141 days | 25% |
| Frauke | 7/10 | 7183 days | 24% |
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
-3.66% 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 | -3.60% |
| 198 | -3.62% |
| 199 | -3.64% |
| 200 | -3.66% |
| 201 | -3.68% |
| 202 | -3.70% |
| 203 | -3.71% |
| … | … |
Balancing Adjustment
1.65% 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.