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
89.30%
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 | 1936 days | 100% |
| Amanda Walden | 10/10 | 2819 days | 64% |
| Monique Pos | 9/10 | 2909 days | 60% |
| Alison Egan-Jones | 9/10 | 2939 days | 58% |
| Sylvain Schiber | 9/10 | 2939 days | 58% |
| Sylvain Chanton | 10/10 | 2944 days | 59% |
| Julian Gury | 8/10 | 2952 days | 57% |
| R. Damen | 9/10 | 2970 days | 57% |
| Michelle Smit | 10/10 | 3031 days | 55% |
| Gesa Roemer | 8/10 | 3160 days | 49% |
| Anais Roux | 10/10 | 3165 days | 50% |
| Luca Staudt | 8/10 | 3184 days | 48% |
| Florian Bisault | 7/10 | 3185 days | 45% |
| Anna Jungclaus | 9/10 | 3192 days | 48% |
| Signe Broedbaek | 7/10 | 3194 days | 45% |
| Petra Fragner | 10/10 | 3200 days | 48% |
| Koehler Ute | 10/10 | 3213 days | 48% |
| Niclas Ullno | 8/10 | 3215 days | 47% |
| Tamara | 7/10 | 3216 days | 44% |
| Chloe Guerillot | 9/10 | 3226 days | 47% |
| Luisa and Hannes | 9/10 | 3239 days | 46% |
| elena salimzhanova | 10/10 | 3244 days | 46% |
| Jakub Trojanek | 8/10 | 3254 days | 45% |
| Malina | 10/10 | 3260 days | 46% |
| Emma Keegan | 7/10 | 3519 days | 33% |
| Emilie Normand | 7/10 | 3589 days | 30% |
| Christopher Buch Madsen | 8/10 | 3910 days | 19% |
| Phil Bromby | 9/10 | 3912 days | 19% |
| Tobias Thull | 7/10 | 3918 days | 18% |
| Rita Hochstiasser | 8/10 | 3940 days | 18% |
| Nelle Dutilleur | 10/10 | 3961 days | 17% |
| Mathias Butterlin | 8/10 | 3961 days | 17% |
| Daryl | 8/10 | 3969 days | 16% |
| Bert Pubeg | 9/10 | 4035 days | 14% |
| Alex | 8/10 | 4339 days | 2% |
| Lucie | 9/10 | 4375 days | 0% |
| Henzen | 9/10 | 4379 days | 0% |
| Roy Barton | 9/10 | 4642 days | 21% |
| Brian Livesey | 9/10 | 4650 days | 21% |
| Merlyn | 8/10 | 4658 days | 20% |
| Beyeler | 10/10 | 4662 days | 21% |
| Ralf Glaser | 7/10 | 4662 days | 19% |
| Suzanne van Kol | 8/10 | 4667 days | 20% |
| kiwifrenchy | 10/10 | 4674 days | 21% |
| _mel_ | 9/10 | 4705 days | 21% |
| C | 10/10 | 4705 days | 21% |
| Sarah and Soren | 10/10 | 4742 days | 21% |
| Erik Folkersen | 10/10 | 4750 days | 21% |
| Rudlinger | 10/10 | 4753 days | 21% |
| GenH | 10/10 | 4980 days | 21% |
| R Tearle | 10/10 | 4989 days | 21% |
| Franzi & Tobi | 10/10 | 4991 days | 21% |
| Nathalie | 10/10 | 4995 days | 21% |
| Ven | 9/10 | 4997 days | 21% |
| Jerven and Kim | 10/10 | 5004 days | 21% |
| Sarah Luijckx | 1/10 | 5006 days | 8% |
| Alan Jeffery | 7/10 | 5007 days | 19% |
| Birgette Weiner | 9/10 | 5025 days | 21% |
| Tim Van Nispen | 9/10 | 5027 days | 21% |
| Bottcher | 10/10 | 5027 days | 21% |
| Sue & Graham Mullin | 10/10 | 5034 days | 21% |
| John Simpson | 9/10 | 5036 days | 21% |
| Karen Phillips | 9/10 | 5036 days | 21% |
| Michelle Booty | 8/10 | 5038 days | 20% |
| Nadia Husain | 7/10 | 5039 days | 19% |
| Dietmar Gans | 10/10 | 5345 days | 21% |
| Matt Roper | 10/10 | 5367 days | 21% |
| Chris Glasg | 10/10 | 5384 days | 21% |
| Jamie Hallifax | 9/10 | 5395 days | 21% |
| Paul Ritchie | 10/10 | 5399 days | 21% |
| Gerry Donoghue | 10/10 | 5418 days | 21% |
| Yvonne German | 9/10 | 5421 days | 21% |
| DebbieM | 5/10 | 5435 days | 16% |
| mj111 | 10/10 | 5435 days | 21% |
| Susann Koschmeider | 10/10 | 5470 days | 21% |
| X Otte | 10/10 | 5474 days | 21% |
| Hans Hoff | 10/10 | 5474 days | 21% |
| Solveig Mosinski | 10/10 | 5478 days | 21% |
| Val and Barnie Weir | 10/10 | 5489 days | 21% |
| Wim Put | 9/10 | 5492 days | 21% |
| discerner | 10/10 | 5496 days | 21% |
| Phillip Reade | 10/10 | 5496 days | 21% |
| Tim Beuzeval | 9/10 | 5496 days | 21% |
| barp | 9/10 | 5527 days | 21% |
| Becky Fairweather | 10/10 | 5680 days | 21% |
| David | 10/10 | 5710 days | 21% |
| martinat | 10/10 | 5710 days | 21% |
| Mike | 9/10 | 5720 days | 21% |
| MichaelS1 | 9/10 | 5726 days | 21% |
| StefanieGermany | 9/10 | 5728 days | 21% |
| Veronika | 9/10 | 5730 days | 21% |
| Ralph Boese | 7/10 | 5730 days | 19% |
| ToyalFrance | 9/10 | 5730 days | 21% |
| ReneeA | 9/10 | 5758 days | 21% |
| Lorna | 8/10 | 5760 days | 20% |
| Bruce | 10/10 | 5761 days | 21% |
| Sandra | 10/10 | 5768 days | 21% |
| Heidi | 7/10 | 5775 days | 19% |
| Philipp | 9/10 | 5775 days | 21% |
| Simon | 9/10 | 5776 days | 21% |
| Kathryn | 8/10 | 5778 days | 20% |
| Barbara | 9/10 | 5783 days | 21% |
| Joachim | 10/10 | 5783 days | 21% |
| Ans | 7/10 | 5784 days | 19% |
| Minder | 10/10 | 5785 days | 21% |
| Evi | 7/10 | 5816 days | 19% |
| Ann Maree | 9/10 | 5819 days | 21% |
| Trine | 9/10 | 5829 days | 21% |
| Carina Korn | 10/10 | 5926 days | 21% |
| Christian | 7/10 | 5926 days | 19% |
| Nick | 10/10 | 5929 days | 21% |
| Terri Scott | 7/10 | 5946 days | 19% |
| Alan Bellerby | 10/10 | 6096 days | 21% |
| Robert | 4/10 | 6102 days | 14% |
| Elise | 10/10 | 6102 days | 21% |
| Fung | 8/10 | 6102 days | 20% |
| Peter Aston | 9/10 | 6102 days | 21% |
| Tony Wicks | 8/10 | 6107 days | 20% |
| Sue | 8/10 | 6114 days | 20% |
| Carla | 9/10 | 6122 days | 21% |
| Melissa Steedman | 9/10 | 6149 days | 21% |
| Vanessa Brennan | 7/10 | 6149 days | 19% |
| Tim | 9/10 | 6150 days | 21% |
| Mary | 10/10 | 6200 days | 21% |
| Agnes | 9/10 | 6416 days | 21% |
| Cohen | 9/10 | 6436 days | 21% |
| John | 8/10 | 6440 days | 20% |
| SueLinsk | 9/10 | 6440 days | 21% |
| Frauke | 7/10 | 6482 days | 19% |
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
-4.03% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 44 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 | -3.97% |
| 198 | -3.99% |
| 199 | -4.01% |
| 200 | -4.03% |
| 201 | -4.05% |
| 202 | -4.07% |
| 203 | -4.09% |
| … | … |
Balancing Adjustment
1.77% 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.