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
89.67%
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 | 2320 days | 100% |
| Amanda Walden | 10/10 | 3203 days | 57% |
| Monique Pos | 9/10 | 3293 days | 52% |
| Alison Egan-Jones | 9/10 | 3323 days | 50% |
| Sylvain Schiber | 9/10 | 3324 days | 50% |
| Sylvain Chanton | 10/10 | 3329 days | 50% |
| Julian Gury | 8/10 | 3337 days | 49% |
| R. Damen | 9/10 | 3354 days | 49% |
| Michelle Smit | 10/10 | 3415 days | 46% |
| Gesa Roemer | 8/10 | 3545 days | 39% |
| Anais Roux | 10/10 | 3550 days | 40% |
| Luca Staudt | 8/10 | 3569 days | 38% |
| Florian Bisault | 7/10 | 3570 days | 36% |
| Anna Jungclaus | 9/10 | 3577 days | 38% |
| Signe Broedbaek | 7/10 | 3579 days | 35% |
| Petra Fragner | 10/10 | 3585 days | 38% |
| Koehler Ute | 10/10 | 3597 days | 37% |
| Niclas Ullno | 8/10 | 3600 days | 36% |
| Tamara | 7/10 | 3601 days | 34% |
| Chloe Guerillot | 9/10 | 3611 days | 36% |
| Luisa and Hannes | 9/10 | 3624 days | 36% |
| elena salimzhanova | 10/10 | 3628 days | 36% |
| Jakub Trojanek | 8/10 | 3639 days | 34% |
| Malina | 10/10 | 3645 days | 35% |
| Emma Keegan | 7/10 | 3903 days | 21% |
| Emilie Normand | 7/10 | 3974 days | 17% |
| Christopher Buch Madsen | 8/10 | 4295 days | 3% |
| Phil Bromby | 9/10 | 4297 days | 3% |
| Tobias Thull | 7/10 | 4303 days | 2% |
| Rita Hochstiasser | 8/10 | 4325 days | 1% |
| Nelle Dutilleur | 10/10 | 4346 days | 0% |
| Mathias Butterlin | 8/10 | 4346 days | 0% |
| Daryl | 8/10 | 4354 days | 0% |
| Bert Pubeg | 9/10 | 4420 days | 24% |
| Alex | 8/10 | 4724 days | 23% |
| Lucie | 9/10 | 4760 days | 24% |
| Henzen | 9/10 | 4764 days | 24% |
| Roy Barton | 9/10 | 5027 days | 24% |
| Brian Livesey | 9/10 | 5035 days | 24% |
| Merlyn | 8/10 | 5043 days | 23% |
| Beyeler | 10/10 | 5047 days | 24% |
| Ralf Glaser | 7/10 | 5047 days | 22% |
| Suzanne van Kol | 8/10 | 5052 days | 23% |
| kiwifrenchy | 10/10 | 5059 days | 24% |
| _mel_ | 9/10 | 5090 days | 24% |
| C | 10/10 | 5090 days | 24% |
| Sarah and Soren | 10/10 | 5127 days | 24% |
| Erik Folkersen | 10/10 | 5135 days | 24% |
| Rudlinger | 10/10 | 5138 days | 24% |
| GenH | 10/10 | 5365 days | 24% |
| R Tearle | 10/10 | 5374 days | 24% |
| Franzi & Tobi | 10/10 | 5376 days | 24% |
| Nathalie | 10/10 | 5380 days | 24% |
| Ven | 9/10 | 5382 days | 24% |
| Jerven and Kim | 10/10 | 5389 days | 24% |
| Sarah Luijckx | 1/10 | 5391 days | 9% |
| Alan Jeffery | 7/10 | 5392 days | 22% |
| Birgette Weiner | 9/10 | 5410 days | 24% |
| Tim Van Nispen | 9/10 | 5412 days | 24% |
| Bottcher | 10/10 | 5412 days | 24% |
| Sue & Graham Mullin | 10/10 | 5419 days | 24% |
| John Simpson | 9/10 | 5421 days | 24% |
| Karen Phillips | 9/10 | 5421 days | 24% |
| Michelle Booty | 8/10 | 5423 days | 23% |
| Nadia Husain | 7/10 | 5424 days | 22% |
| Dietmar Gans | 10/10 | 5730 days | 24% |
| Matt Roper | 10/10 | 5752 days | 24% |
| Chris Glasg | 10/10 | 5769 days | 24% |
| Jamie Hallifax | 9/10 | 5780 days | 24% |
| Paul Ritchie | 10/10 | 5784 days | 24% |
| Gerry Donoghue | 10/10 | 5803 days | 24% |
| Yvonne German | 9/10 | 5806 days | 24% |
| DebbieM | 5/10 | 5820 days | 18% |
| mj111 | 10/10 | 5820 days | 24% |
| Susann Koschmeider | 10/10 | 5855 days | 24% |
| X Otte | 10/10 | 5859 days | 24% |
| Hans Hoff | 10/10 | 5859 days | 24% |
| Solveig Mosinski | 10/10 | 5863 days | 24% |
| Val and Barnie Weir | 10/10 | 5874 days | 24% |
| Wim Put | 9/10 | 5877 days | 24% |
| discerner | 10/10 | 5881 days | 24% |
| Phillip Reade | 10/10 | 5881 days | 24% |
| Tim Beuzeval | 9/10 | 5881 days | 24% |
| barp | 9/10 | 5912 days | 24% |
| Becky Fairweather | 10/10 | 6064 days | 24% |
| David | 10/10 | 6095 days | 24% |
| martinat | 10/10 | 6095 days | 24% |
| Mike | 9/10 | 6104 days | 24% |
| MichaelS1 | 9/10 | 6111 days | 24% |
| StefanieGermany | 9/10 | 6112 days | 24% |
| Veronika | 9/10 | 6114 days | 24% |
| Ralph Boese | 7/10 | 6115 days | 22% |
| ToyalFrance | 9/10 | 6115 days | 24% |
| ReneeA | 9/10 | 6143 days | 24% |
| Lorna | 8/10 | 6144 days | 23% |
| Bruce | 10/10 | 6145 days | 24% |
| Sandra | 10/10 | 6152 days | 24% |
| Heidi | 7/10 | 6159 days | 22% |
| Philipp | 9/10 | 6159 days | 24% |
| Simon | 9/10 | 6161 days | 24% |
| Kathryn | 8/10 | 6162 days | 23% |
| Barbara | 9/10 | 6167 days | 24% |
| Joachim | 10/10 | 6167 days | 24% |
| Ans | 7/10 | 6168 days | 22% |
| Minder | 10/10 | 6169 days | 24% |
| Evi | 7/10 | 6200 days | 22% |
| Ann Maree | 9/10 | 6203 days | 24% |
| Trine | 9/10 | 6213 days | 24% |
| Carina Korn | 10/10 | 6310 days | 24% |
| Christian | 7/10 | 6310 days | 22% |
| Nick | 10/10 | 6313 days | 24% |
| Terri Scott | 7/10 | 6330 days | 22% |
| Alan Bellerby | 10/10 | 6481 days | 24% |
| Robert | 4/10 | 6487 days | 15% |
| Elise | 10/10 | 6487 days | 24% |
| Fung | 8/10 | 6487 days | 23% |
| Peter Aston | 9/10 | 6487 days | 24% |
| Tony Wicks | 8/10 | 6492 days | 23% |
| Sue | 8/10 | 6499 days | 23% |
| Carla | 9/10 | 6507 days | 24% |
| Melissa Steedman | 9/10 | 6534 days | 24% |
| Vanessa Brennan | 7/10 | 6534 days | 22% |
| Tim | 9/10 | 6535 days | 24% |
| Mary | 10/10 | 6585 days | 24% |
| Agnes | 9/10 | 6800 days | 24% |
| Cohen | 9/10 | 6820 days | 24% |
| John | 8/10 | 6824 days | 23% |
| SueLinsk | 9/10 | 6824 days | 24% |
| Frauke | 7/10 | 6867 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
-4.07% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 42 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 | -4.01% |
| 198 | -4.03% |
| 199 | -4.05% |
| 200 | -4.07% |
| 201 | -4.09% |
| 202 | -4.11% |
| 203 | -4.13% |
| … | … |
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.