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
89.63%
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 | 2394 days | 100% |
| Amanda Walden | 10/10 | 3277 days | 55% |
| Monique Pos | 9/10 | 3367 days | 50% |
| Alison Egan-Jones | 9/10 | 3397 days | 49% |
| Sylvain Schiber | 9/10 | 3398 days | 49% |
| Sylvain Chanton | 10/10 | 3403 days | 49% |
| Julian Gury | 8/10 | 3411 days | 48% |
| R. Damen | 9/10 | 3428 days | 47% |
| Michelle Smit | 10/10 | 3489 days | 45% |
| Gesa Roemer | 8/10 | 3619 days | 37% |
| Anais Roux | 10/10 | 3624 days | 38% |
| Luca Staudt | 8/10 | 3643 days | 36% |
| Florian Bisault | 7/10 | 3644 days | 34% |
| Anna Jungclaus | 9/10 | 3651 days | 36% |
| Signe Broedbaek | 7/10 | 3653 days | 34% |
| Petra Fragner | 10/10 | 3659 days | 36% |
| Koehler Ute | 10/10 | 3671 days | 36% |
| Niclas Ullno | 8/10 | 3674 days | 35% |
| Tamara | 7/10 | 3675 days | 33% |
| Chloe Guerillot | 9/10 | 3685 days | 35% |
| Luisa and Hannes | 9/10 | 3698 days | 34% |
| elena salimzhanova | 10/10 | 3702 days | 34% |
| Jakub Trojanek | 8/10 | 3713 days | 33% |
| Malina | 10/10 | 3719 days | 33% |
| Emma Keegan | 7/10 | 3977 days | 19% |
| Emilie Normand | 7/10 | 4048 days | 15% |
| Christopher Buch Madsen | 8/10 | 4369 days | 0% |
| Phil Bromby | 9/10 | 4371 days | 0% |
| Tobias Thull | 7/10 | 4377 days | 0% |
| Rita Hochstiasser | 8/10 | 4399 days | 25% |
| Nelle Dutilleur | 10/10 | 4420 days | 26% |
| Mathias Butterlin | 8/10 | 4420 days | 25% |
| Daryl | 8/10 | 4428 days | 25% |
| Bert Pubeg | 9/10 | 4494 days | 25% |
| Alex | 8/10 | 4798 days | 25% |
| Lucie | 9/10 | 4834 days | 25% |
| Henzen | 9/10 | 4838 days | 25% |
| Roy Barton | 9/10 | 5101 days | 25% |
| Brian Livesey | 9/10 | 5109 days | 25% |
| Merlyn | 8/10 | 5117 days | 25% |
| Beyeler | 10/10 | 5121 days | 26% |
| Ralf Glaser | 7/10 | 5121 days | 24% |
| Suzanne van Kol | 8/10 | 5126 days | 25% |
| kiwifrenchy | 10/10 | 5133 days | 26% |
| _mel_ | 9/10 | 5164 days | 25% |
| C | 10/10 | 5164 days | 26% |
| Sarah and Soren | 10/10 | 5201 days | 26% |
| Erik Folkersen | 10/10 | 5209 days | 26% |
| Rudlinger | 10/10 | 5212 days | 26% |
| GenH | 10/10 | 5439 days | 26% |
| R Tearle | 10/10 | 5448 days | 26% |
| Franzi & Tobi | 10/10 | 5450 days | 26% |
| Nathalie | 10/10 | 5454 days | 26% |
| Ven | 9/10 | 5456 days | 25% |
| Jerven and Kim | 10/10 | 5463 days | 26% |
| Sarah Luijckx | 1/10 | 5465 days | 10% |
| Alan Jeffery | 7/10 | 5466 days | 24% |
| Birgette Weiner | 9/10 | 5484 days | 25% |
| Tim Van Nispen | 9/10 | 5486 days | 25% |
| Bottcher | 10/10 | 5486 days | 26% |
| Sue & Graham Mullin | 10/10 | 5493 days | 26% |
| John Simpson | 9/10 | 5495 days | 25% |
| Karen Phillips | 9/10 | 5495 days | 25% |
| Michelle Booty | 8/10 | 5497 days | 25% |
| Nadia Husain | 7/10 | 5498 days | 24% |
| Dietmar Gans | 10/10 | 5804 days | 26% |
| Matt Roper | 10/10 | 5826 days | 26% |
| Chris Glasg | 10/10 | 5843 days | 26% |
| Jamie Hallifax | 9/10 | 5854 days | 25% |
| Paul Ritchie | 10/10 | 5858 days | 26% |
| Gerry Donoghue | 10/10 | 5877 days | 26% |
| Yvonne German | 9/10 | 5880 days | 25% |
| DebbieM | 5/10 | 5894 days | 20% |
| mj111 | 10/10 | 5894 days | 26% |
| Susann Koschmeider | 10/10 | 5929 days | 26% |
| X Otte | 10/10 | 5933 days | 26% |
| Hans Hoff | 10/10 | 5933 days | 26% |
| Solveig Mosinski | 10/10 | 5937 days | 26% |
| Val and Barnie Weir | 10/10 | 5948 days | 26% |
| Wim Put | 9/10 | 5951 days | 25% |
| discerner | 10/10 | 5955 days | 26% |
| Phillip Reade | 10/10 | 5955 days | 26% |
| Tim Beuzeval | 9/10 | 5955 days | 25% |
| barp | 9/10 | 5986 days | 25% |
| Becky Fairweather | 10/10 | 6139 days | 26% |
| David | 10/10 | 6169 days | 26% |
| martinat | 10/10 | 6169 days | 26% |
| Mike | 9/10 | 6178 days | 25% |
| MichaelS1 | 9/10 | 6185 days | 25% |
| StefanieGermany | 9/10 | 6186 days | 25% |
| Veronika | 9/10 | 6188 days | 25% |
| Ralph Boese | 7/10 | 6189 days | 24% |
| ToyalFrance | 9/10 | 6189 days | 25% |
| ReneeA | 9/10 | 6217 days | 25% |
| Lorna | 8/10 | 6218 days | 25% |
| Bruce | 10/10 | 6219 days | 26% |
| Sandra | 10/10 | 6226 days | 26% |
| Heidi | 7/10 | 6233 days | 24% |
| Philipp | 9/10 | 6233 days | 25% |
| Simon | 9/10 | 6235 days | 25% |
| Kathryn | 8/10 | 6236 days | 25% |
| Barbara | 9/10 | 6241 days | 25% |
| Joachim | 10/10 | 6241 days | 26% |
| Ans | 7/10 | 6242 days | 24% |
| Minder | 10/10 | 6243 days | 26% |
| Evi | 7/10 | 6274 days | 24% |
| Ann Maree | 9/10 | 6277 days | 25% |
| Trine | 9/10 | 6287 days | 25% |
| Carina Korn | 10/10 | 6384 days | 26% |
| Christian | 7/10 | 6384 days | 24% |
| Nick | 10/10 | 6387 days | 26% |
| Terri Scott | 7/10 | 6404 days | 24% |
| Alan Bellerby | 10/10 | 6555 days | 26% |
| Robert | 4/10 | 6561 days | 17% |
| Elise | 10/10 | 6561 days | 26% |
| Fung | 8/10 | 6561 days | 25% |
| Peter Aston | 9/10 | 6561 days | 25% |
| Tony Wicks | 8/10 | 6566 days | 25% |
| Sue | 8/10 | 6573 days | 25% |
| Carla | 9/10 | 6581 days | 25% |
| Melissa Steedman | 9/10 | 6608 days | 25% |
| Vanessa Brennan | 7/10 | 6608 days | 24% |
| Tim | 9/10 | 6609 days | 25% |
| Mary | 10/10 | 6659 days | 26% |
| Agnes | 9/10 | 6875 days | 25% |
| Cohen | 9/10 | 6895 days | 25% |
| John | 8/10 | 6899 days | 25% |
| SueLinsk | 9/10 | 6899 days | 25% |
| Frauke | 7/10 | 6941 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
-4.14% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 53 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 | -4.19% |
| 203 | -4.21% |
| … | … |
Balancing Adjustment
1.73% 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.