G'day, 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
89.46%
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 | 2434 days | 100% |
| Amanda Walden | 10/10 | 3317 days | 49% |
| Monique Pos | 9/10 | 3407 days | 43% |
| Alison Egan-Jones | 9/10 | 3437 days | 42% |
| Sylvain Schiber | 9/10 | 3438 days | 42% |
| Sylvain Chanton | 10/10 | 3443 days | 42% |
| Julian Gury | 8/10 | 3451 days | 40% |
| R. Damen | 9/10 | 3468 days | 40% |
| Michelle Smit | 10/10 | 3529 days | 37% |
| Gesa Roemer | 8/10 | 3659 days | 29% |
| Anais Roux | 10/10 | 3664 days | 29% |
| Luca Staudt | 8/10 | 3683 days | 27% |
| Florian Bisault | 7/10 | 3684 days | 25% |
| Anna Jungclaus | 9/10 | 3691 days | 27% |
| Signe Broedbaek | 7/10 | 3693 days | 25% |
| Petra Fragner | 10/10 | 3699 days | 27% |
| Koehler Ute | 10/10 | 3711 days | 27% |
| Niclas Ullno | 8/10 | 3714 days | 26% |
| Tamara | 7/10 | 3715 days | 24% |
| Chloe Guerillot | 9/10 | 3725 days | 25% |
| Luisa and Hannes | 9/10 | 3738 days | 25% |
| elena salimzhanova | 10/10 | 3742 days | 25% |
| Jakub Trojanek | 8/10 | 3753 days | 23% |
| Malina | 10/10 | 3759 days | 24% |
| Emma Keegan | 7/10 | 4017 days | 8% |
| Emilie Normand | 7/10 | 4088 days | 4% |
| Christopher Buch Madsen | 8/10 | 4409 days | 17% |
| Phil Bromby | 9/10 | 4411 days | 17% |
| Tobias Thull | 7/10 | 4417 days | 15% |
| Rita Hochstiasser | 8/10 | 4439 days | 17% |
| Nelle Dutilleur | 10/10 | 4460 days | 17% |
| Mathias Butterlin | 8/10 | 4460 days | 17% |
| Daryl | 8/10 | 4468 days | 17% |
| Bert Pubeg | 9/10 | 4534 days | 17% |
| Alex | 8/10 | 4838 days | 17% |
| Lucie | 9/10 | 4874 days | 17% |
| Henzen | 9/10 | 4878 days | 17% |
| Roy Barton | 9/10 | 5141 days | 17% |
| Brian Livesey | 9/10 | 5149 days | 17% |
| Merlyn | 8/10 | 5157 days | 17% |
| Beyeler | 10/10 | 5161 days | 17% |
| Ralf Glaser | 7/10 | 5161 days | 15% |
| Suzanne van Kol | 8/10 | 5166 days | 17% |
| kiwifrenchy | 10/10 | 5173 days | 17% |
| _mel_ | 9/10 | 5204 days | 17% |
| C | 10/10 | 5204 days | 17% |
| Sarah and Soren | 10/10 | 5241 days | 17% |
| Erik Folkersen | 10/10 | 5249 days | 17% |
| Rudlinger | 10/10 | 5252 days | 17% |
| GenH | 10/10 | 5479 days | 17% |
| R Tearle | 10/10 | 5488 days | 17% |
| Franzi & Tobi | 10/10 | 5490 days | 17% |
| Nathalie | 10/10 | 5494 days | 17% |
| Ven | 9/10 | 5496 days | 17% |
| Jerven and Kim | 10/10 | 5503 days | 17% |
| Sarah Luijckx | 1/10 | 5505 days | 0% |
| Alan Jeffery | 7/10 | 5506 days | 15% |
| Birgette Weiner | 9/10 | 5524 days | 17% |
| Tim Van Nispen | 9/10 | 5526 days | 17% |
| Bottcher | 10/10 | 5526 days | 17% |
| Sue & Graham Mullin | 10/10 | 5533 days | 17% |
| John Simpson | 9/10 | 5535 days | 17% |
| Karen Phillips | 9/10 | 5535 days | 17% |
| Michelle Booty | 8/10 | 5537 days | 17% |
| Nadia Husain | 7/10 | 5538 days | 15% |
| Dietmar Gans | 10/10 | 5844 days | 17% |
| Matt Roper | 10/10 | 5866 days | 17% |
| Chris Glasg | 10/10 | 5883 days | 17% |
| Jamie Hallifax | 9/10 | 5894 days | 17% |
| Paul Ritchie | 10/10 | 5898 days | 17% |
| Gerry Donoghue | 10/10 | 5917 days | 17% |
| Yvonne German | 9/10 | 5920 days | 17% |
| DebbieM | 5/10 | 5934 days | 10% |
| mj111 | 10/10 | 5934 days | 17% |
| Susann Koschmeider | 10/10 | 5969 days | 17% |
| X Otte | 10/10 | 5973 days | 17% |
| Hans Hoff | 10/10 | 5973 days | 17% |
| Solveig Mosinski | 10/10 | 5977 days | 17% |
| Val and Barnie Weir | 10/10 | 5988 days | 17% |
| Wim Put | 9/10 | 5991 days | 17% |
| discerner | 10/10 | 5995 days | 17% |
| Phillip Reade | 10/10 | 5995 days | 17% |
| Tim Beuzeval | 9/10 | 5995 days | 17% |
| barp | 9/10 | 6026 days | 17% |
| Becky Fairweather | 10/10 | 6179 days | 17% |
| David | 10/10 | 6209 days | 17% |
| martinat | 10/10 | 6209 days | 17% |
| Mike | 9/10 | 6218 days | 17% |
| MichaelS1 | 9/10 | 6225 days | 17% |
| StefanieGermany | 9/10 | 6226 days | 17% |
| Veronika | 9/10 | 6228 days | 17% |
| Ralph Boese | 7/10 | 6229 days | 15% |
| ToyalFrance | 9/10 | 6229 days | 17% |
| ReneeA | 9/10 | 6257 days | 17% |
| Lorna | 8/10 | 6258 days | 17% |
| Bruce | 10/10 | 6259 days | 17% |
| Sandra | 10/10 | 6266 days | 17% |
| Heidi | 7/10 | 6273 days | 15% |
| Philipp | 9/10 | 6273 days | 17% |
| Simon | 9/10 | 6275 days | 17% |
| Kathryn | 8/10 | 6276 days | 17% |
| Barbara | 9/10 | 6281 days | 17% |
| Joachim | 10/10 | 6281 days | 17% |
| Ans | 7/10 | 6282 days | 15% |
| Minder | 10/10 | 6283 days | 17% |
| Evi | 7/10 | 6314 days | 15% |
| Ann Maree | 9/10 | 6317 days | 17% |
| Trine | 9/10 | 6327 days | 17% |
| Carina Korn | 10/10 | 6424 days | 17% |
| Christian | 7/10 | 6424 days | 15% |
| Nick | 10/10 | 6427 days | 17% |
| Terri Scott | 7/10 | 6444 days | 15% |
| Alan Bellerby | 10/10 | 6595 days | 17% |
| Robert | 4/10 | 6601 days | 7% |
| Elise | 10/10 | 6601 days | 17% |
| Fung | 8/10 | 6601 days | 17% |
| Peter Aston | 9/10 | 6601 days | 17% |
| Tony Wicks | 8/10 | 6606 days | 17% |
| Sue | 8/10 | 6613 days | 17% |
| Carla | 9/10 | 6621 days | 17% |
| Melissa Steedman | 9/10 | 6648 days | 17% |
| Vanessa Brennan | 7/10 | 6648 days | 15% |
| Tim | 9/10 | 6649 days | 17% |
| Mary | 10/10 | 6699 days | 17% |
| Agnes | 9/10 | 6915 days | 17% |
| Cohen | 9/10 | 6935 days | 17% |
| John | 8/10 | 6939 days | 17% |
| SueLinsk | 9/10 | 6939 days | 17% |
| Frauke | 7/10 | 6981 days | 15% |
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
-3.74% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 60 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 | -3.68% |
| 198 | -3.70% |
| 199 | -3.72% |
| 200 | -3.74% |
| 201 | -3.76% |
| 202 | -3.77% |
| 203 | -3.79% |
| … | … |
Balancing Adjustment
1.68% 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.