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
89.24%
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 | 1875 days | 100% |
| Amanda Walden | 10/10 | 2758 days | 64% |
| Monique Pos | 9/10 | 2848 days | 60% |
| Alison Egan-Jones | 9/10 | 2878 days | 58% |
| Sylvain Schiber | 9/10 | 2879 days | 58% |
| Sylvain Chanton | 10/10 | 2884 days | 59% |
| Julian Gury | 8/10 | 2892 days | 57% |
| R. Damen | 9/10 | 2909 days | 57% |
| Michelle Smit | 10/10 | 2970 days | 55% |
| Gesa Roemer | 8/10 | 3100 days | 49% |
| Anais Roux | 10/10 | 3105 days | 50% |
| Luca Staudt | 8/10 | 3124 days | 48% |
| Florian Bisault | 7/10 | 3125 days | 45% |
| Anna Jungclaus | 9/10 | 3132 days | 48% |
| Signe Broedbaek | 7/10 | 3134 days | 45% |
| Petra Fragner | 10/10 | 3140 days | 48% |
| Koehler Ute | 10/10 | 3152 days | 48% |
| Niclas Ullno | 8/10 | 3155 days | 47% |
| Tamara | 7/10 | 3156 days | 44% |
| Chloe Guerillot | 9/10 | 3166 days | 47% |
| Luisa and Hannes | 9/10 | 3179 days | 46% |
| elena salimzhanova | 10/10 | 3183 days | 46% |
| Jakub Trojanek | 8/10 | 3194 days | 45% |
| Malina | 10/10 | 3200 days | 46% |
| Emma Keegan | 7/10 | 3458 days | 33% |
| Emilie Normand | 7/10 | 3529 days | 30% |
| Christopher Buch Madsen | 8/10 | 3850 days | 19% |
| Phil Bromby | 9/10 | 3852 days | 19% |
| Tobias Thull | 7/10 | 3858 days | 17% |
| Rita Hochstiasser | 8/10 | 3880 days | 18% |
| Nelle Dutilleur | 10/10 | 3901 days | 17% |
| Mathias Butterlin | 8/10 | 3901 days | 17% |
| Daryl | 8/10 | 3909 days | 16% |
| Bert Pubeg | 9/10 | 3975 days | 14% |
| Alex | 8/10 | 4279 days | 2% |
| Lucie | 9/10 | 4315 days | 0% |
| Henzen | 9/10 | 4319 days | 0% |
| Roy Barton | 9/10 | 4582 days | 18% |
| Brian Livesey | 9/10 | 4590 days | 18% |
| Merlyn | 8/10 | 4598 days | 18% |
| Beyeler | 10/10 | 4602 days | 18% |
| Ralf Glaser | 7/10 | 4602 days | 17% |
| Suzanne van Kol | 8/10 | 4607 days | 18% |
| kiwifrenchy | 10/10 | 4614 days | 18% |
| _mel_ | 9/10 | 4645 days | 18% |
| C | 10/10 | 4645 days | 18% |
| Sarah and Soren | 10/10 | 4682 days | 18% |
| Erik Folkersen | 10/10 | 4690 days | 18% |
| Rudlinger | 10/10 | 4693 days | 18% |
| GenH | 10/10 | 4920 days | 18% |
| R Tearle | 10/10 | 4929 days | 18% |
| Franzi & Tobi | 10/10 | 4931 days | 18% |
| Nathalie | 10/10 | 4935 days | 18% |
| Ven | 9/10 | 4937 days | 18% |
| Jerven and Kim | 10/10 | 4944 days | 18% |
| Sarah Luijckx | 1/10 | 4946 days | 6% |
| Alan Jeffery | 7/10 | 4947 days | 17% |
| Birgette Weiner | 9/10 | 4965 days | 18% |
| Tim Van Nispen | 9/10 | 4967 days | 18% |
| Bottcher | 10/10 | 4967 days | 18% |
| Sue & Graham Mullin | 10/10 | 4974 days | 18% |
| John Simpson | 9/10 | 4976 days | 18% |
| Karen Phillips | 9/10 | 4976 days | 18% |
| Michelle Booty | 8/10 | 4978 days | 18% |
| Nadia Husain | 7/10 | 4979 days | 17% |
| Dietmar Gans | 10/10 | 5285 days | 18% |
| Matt Roper | 10/10 | 5307 days | 18% |
| Chris Glasg | 10/10 | 5324 days | 18% |
| Jamie Hallifax | 9/10 | 5335 days | 18% |
| Paul Ritchie | 10/10 | 5339 days | 18% |
| Gerry Donoghue | 10/10 | 5358 days | 18% |
| Yvonne German | 9/10 | 5361 days | 18% |
| DebbieM | 5/10 | 5375 days | 13% |
| mj111 | 10/10 | 5375 days | 18% |
| Susann Koschmeider | 10/10 | 5410 days | 18% |
| X Otte | 10/10 | 5414 days | 18% |
| Hans Hoff | 10/10 | 5414 days | 18% |
| Solveig Mosinski | 10/10 | 5418 days | 18% |
| Val and Barnie Weir | 10/10 | 5429 days | 18% |
| Wim Put | 9/10 | 5432 days | 18% |
| discerner | 10/10 | 5436 days | 18% |
| Phillip Reade | 10/10 | 5436 days | 18% |
| Tim Beuzeval | 9/10 | 5436 days | 18% |
| barp | 9/10 | 5467 days | 18% |
| Becky Fairweather | 10/10 | 5620 days | 18% |
| David | 10/10 | 5650 days | 18% |
| martinat | 10/10 | 5650 days | 18% |
| Mike | 9/10 | 5659 days | 18% |
| MichaelS1 | 9/10 | 5666 days | 18% |
| StefanieGermany | 9/10 | 5667 days | 18% |
| Veronika | 9/10 | 5669 days | 18% |
| Ralph Boese | 7/10 | 5670 days | 17% |
| ToyalFrance | 9/10 | 5670 days | 18% |
| ReneeA | 9/10 | 5698 days | 18% |
| Lorna | 8/10 | 5699 days | 18% |
| Bruce | 10/10 | 5700 days | 18% |
| Sandra | 10/10 | 5707 days | 18% |
| Heidi | 7/10 | 5714 days | 17% |
| Philipp | 9/10 | 5714 days | 18% |
| Simon | 9/10 | 5716 days | 18% |
| Kathryn | 8/10 | 5717 days | 18% |
| Barbara | 9/10 | 5722 days | 18% |
| Joachim | 10/10 | 5722 days | 18% |
| Ans | 7/10 | 5723 days | 17% |
| Minder | 10/10 | 5724 days | 18% |
| Evi | 7/10 | 5755 days | 17% |
| Ann Maree | 9/10 | 5758 days | 18% |
| Trine | 9/10 | 5768 days | 18% |
| Carina Korn | 10/10 | 5866 days | 18% |
| Christian | 7/10 | 5866 days | 17% |
| Nick | 10/10 | 5868 days | 18% |
| Terri Scott | 7/10 | 5885 days | 17% |
| Alan Bellerby | 10/10 | 6036 days | 18% |
| Robert | 4/10 | 6042 days | 11% |
| Elise | 10/10 | 6042 days | 18% |
| Fung | 8/10 | 6042 days | 18% |
| Peter Aston | 9/10 | 6042 days | 18% |
| Tony Wicks | 8/10 | 6047 days | 18% |
| Sue | 8/10 | 6054 days | 18% |
| Carla | 9/10 | 6062 days | 18% |
| Melissa Steedman | 9/10 | 6089 days | 18% |
| Vanessa Brennan | 7/10 | 6089 days | 17% |
| Tim | 9/10 | 6090 days | 18% |
| Mary | 10/10 | 6140 days | 18% |
| Agnes | 9/10 | 6356 days | 18% |
| Cohen | 9/10 | 6376 days | 18% |
| John | 8/10 | 6380 days | 18% |
| SueLinsk | 9/10 | 6380 days | 18% |
| Frauke | 7/10 | 6422 days | 17% |
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
-3.03% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 75 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 | -2.98% |
| 198 | -3.00% |
| 199 | -3.01% |
| 200 | -3.03% |
| 201 | -3.04% |
| 202 | -3.06% |
| 203 | -3.07% |
| … | … |
Balancing Adjustment
1.59% 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
88%
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.