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
89.69%
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 | 2329 days | 100% |
| Amanda Walden | 10/10 | 3212 days | 57% |
| Monique Pos | 9/10 | 3302 days | 52% |
| Alison Egan-Jones | 9/10 | 3332 days | 50% |
| Sylvain Schiber | 9/10 | 3333 days | 50% |
| Sylvain Chanton | 10/10 | 3338 days | 50% |
| Julian Gury | 8/10 | 3346 days | 49% |
| R. Damen | 9/10 | 3363 days | 49% |
| Michelle Smit | 10/10 | 3424 days | 46% |
| Gesa Roemer | 8/10 | 3554 days | 39% |
| Anais Roux | 10/10 | 3559 days | 40% |
| Luca Staudt | 8/10 | 3578 days | 38% |
| Florian Bisault | 7/10 | 3579 days | 36% |
| Anna Jungclaus | 9/10 | 3586 days | 38% |
| Signe Broedbaek | 7/10 | 3588 days | 35% |
| Petra Fragner | 10/10 | 3594 days | 38% |
| Koehler Ute | 10/10 | 3606 days | 37% |
| Niclas Ullno | 8/10 | 3609 days | 36% |
| Tamara | 7/10 | 3610 days | 34% |
| Chloe Guerillot | 9/10 | 3620 days | 36% |
| Luisa and Hannes | 9/10 | 3633 days | 36% |
| elena salimzhanova | 10/10 | 3637 days | 36% |
| Jakub Trojanek | 8/10 | 3648 days | 34% |
| Malina | 10/10 | 3654 days | 35% |
| Emma Keegan | 7/10 | 3912 days | 21% |
| Emilie Normand | 7/10 | 3983 days | 17% |
| Christopher Buch Madsen | 8/10 | 4304 days | 3% |
| Phil Bromby | 9/10 | 4306 days | 3% |
| Tobias Thull | 7/10 | 4312 days | 2% |
| Rita Hochstiasser | 8/10 | 4334 days | 1% |
| Nelle Dutilleur | 10/10 | 4355 days | 0% |
| Mathias Butterlin | 8/10 | 4355 days | 0% |
| Daryl | 8/10 | 4363 days | 0% |
| Bert Pubeg | 9/10 | 4429 days | 24% |
| Alex | 8/10 | 4733 days | 24% |
| Lucie | 9/10 | 4769 days | 24% |
| Henzen | 9/10 | 4773 days | 24% |
| Roy Barton | 9/10 | 5036 days | 24% |
| Brian Livesey | 9/10 | 5044 days | 24% |
| Merlyn | 8/10 | 5052 days | 24% |
| Beyeler | 10/10 | 5056 days | 24% |
| Ralf Glaser | 7/10 | 5056 days | 23% |
| Suzanne van Kol | 8/10 | 5061 days | 24% |
| kiwifrenchy | 10/10 | 5068 days | 24% |
| _mel_ | 9/10 | 5099 days | 24% |
| C | 10/10 | 5099 days | 24% |
| Sarah and Soren | 10/10 | 5136 days | 24% |
| Erik Folkersen | 10/10 | 5144 days | 24% |
| Rudlinger | 10/10 | 5147 days | 24% |
| GenH | 10/10 | 5374 days | 24% |
| R Tearle | 10/10 | 5383 days | 24% |
| Franzi & Tobi | 10/10 | 5385 days | 24% |
| Nathalie | 10/10 | 5389 days | 24% |
| Ven | 9/10 | 5391 days | 24% |
| Jerven and Kim | 10/10 | 5398 days | 24% |
| Sarah Luijckx | 1/10 | 5400 days | 9% |
| Alan Jeffery | 7/10 | 5401 days | 23% |
| Birgette Weiner | 9/10 | 5419 days | 24% |
| Tim Van Nispen | 9/10 | 5421 days | 24% |
| Bottcher | 10/10 | 5421 days | 24% |
| Sue & Graham Mullin | 10/10 | 5428 days | 24% |
| John Simpson | 9/10 | 5430 days | 24% |
| Karen Phillips | 9/10 | 5430 days | 24% |
| Michelle Booty | 8/10 | 5432 days | 24% |
| Nadia Husain | 7/10 | 5433 days | 23% |
| Dietmar Gans | 10/10 | 5739 days | 24% |
| Matt Roper | 10/10 | 5761 days | 24% |
| Chris Glasg | 10/10 | 5778 days | 24% |
| Jamie Hallifax | 9/10 | 5789 days | 24% |
| Paul Ritchie | 10/10 | 5793 days | 24% |
| Gerry Donoghue | 10/10 | 5812 days | 24% |
| Yvonne German | 9/10 | 5815 days | 24% |
| DebbieM | 5/10 | 5829 days | 18% |
| mj111 | 10/10 | 5829 days | 24% |
| Susann Koschmeider | 10/10 | 5864 days | 24% |
| X Otte | 10/10 | 5868 days | 24% |
| Hans Hoff | 10/10 | 5868 days | 24% |
| Solveig Mosinski | 10/10 | 5872 days | 24% |
| Val and Barnie Weir | 10/10 | 5883 days | 24% |
| Wim Put | 9/10 | 5886 days | 24% |
| discerner | 10/10 | 5890 days | 24% |
| Phillip Reade | 10/10 | 5890 days | 24% |
| Tim Beuzeval | 9/10 | 5890 days | 24% |
| barp | 9/10 | 5921 days | 24% |
| Becky Fairweather | 10/10 | 6074 days | 24% |
| David | 10/10 | 6104 days | 24% |
| martinat | 10/10 | 6104 days | 24% |
| Mike | 9/10 | 6113 days | 24% |
| MichaelS1 | 9/10 | 6120 days | 24% |
| StefanieGermany | 9/10 | 6121 days | 24% |
| Veronika | 9/10 | 6123 days | 24% |
| Ralph Boese | 7/10 | 6124 days | 23% |
| ToyalFrance | 9/10 | 6124 days | 24% |
| ReneeA | 9/10 | 6152 days | 24% |
| Lorna | 8/10 | 6153 days | 24% |
| Bruce | 10/10 | 6154 days | 24% |
| Sandra | 10/10 | 6161 days | 24% |
| Heidi | 7/10 | 6168 days | 23% |
| Philipp | 9/10 | 6168 days | 24% |
| Simon | 9/10 | 6170 days | 24% |
| Kathryn | 8/10 | 6171 days | 24% |
| Barbara | 9/10 | 6176 days | 24% |
| Joachim | 10/10 | 6176 days | 24% |
| Ans | 7/10 | 6177 days | 23% |
| Minder | 10/10 | 6178 days | 24% |
| Evi | 7/10 | 6209 days | 23% |
| Ann Maree | 9/10 | 6212 days | 24% |
| Trine | 9/10 | 6222 days | 24% |
| Carina Korn | 10/10 | 6320 days | 24% |
| Christian | 7/10 | 6320 days | 23% |
| Nick | 10/10 | 6322 days | 24% |
| Terri Scott | 7/10 | 6339 days | 23% |
| Alan Bellerby | 10/10 | 6490 days | 24% |
| Robert | 4/10 | 6496 days | 16% |
| Elise | 10/10 | 6496 days | 24% |
| Fung | 8/10 | 6496 days | 24% |
| Peter Aston | 9/10 | 6496 days | 24% |
| Tony Wicks | 8/10 | 6501 days | 24% |
| Sue | 8/10 | 6508 days | 24% |
| Carla | 9/10 | 6516 days | 24% |
| Melissa Steedman | 9/10 | 6543 days | 24% |
| Vanessa Brennan | 7/10 | 6543 days | 23% |
| Tim | 9/10 | 6544 days | 24% |
| Mary | 10/10 | 6594 days | 24% |
| Agnes | 9/10 | 6810 days | 24% |
| Cohen | 9/10 | 6830 days | 24% |
| John | 8/10 | 6834 days | 24% |
| SueLinsk | 9/10 | 6834 days | 24% |
| Frauke | 7/10 | 6876 days | 23% |
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
-4.05% 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 | -3.99% |
| 198 | -4.01% |
| 199 | -4.03% |
| 200 | -4.05% |
| 201 | -4.07% |
| 202 | -4.09% |
| 203 | -4.11% |
| … | … |
Balancing Adjustment
1.70% 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.