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
89.35%
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 | 1969 days | 100% |
| Amanda Walden | 10/10 | 2852 days | 63% |
| Monique Pos | 9/10 | 2942 days | 59% |
| Alison Egan-Jones | 9/10 | 2972 days | 58% |
| Sylvain Schiber | 9/10 | 2972 days | 58% |
| Sylvain Chanton | 10/10 | 2977 days | 58% |
| Julian Gury | 8/10 | 2985 days | 57% |
| R. Damen | 9/10 | 3003 days | 56% |
| Michelle Smit | 10/10 | 3064 days | 54% |
| Gesa Roemer | 8/10 | 3193 days | 48% |
| Anais Roux | 10/10 | 3198 days | 49% |
| Luca Staudt | 8/10 | 3217 days | 47% |
| Florian Bisault | 7/10 | 3218 days | 45% |
| Anna Jungclaus | 9/10 | 3225 days | 47% |
| Signe Broedbaek | 7/10 | 3227 days | 44% |
| Petra Fragner | 10/10 | 3233 days | 47% |
| Koehler Ute | 10/10 | 3246 days | 47% |
| Niclas Ullno | 8/10 | 3248 days | 46% |
| Tamara | 7/10 | 3249 days | 43% |
| Chloe Guerillot | 9/10 | 3259 days | 46% |
| Luisa and Hannes | 9/10 | 3272 days | 45% |
| elena salimzhanova | 10/10 | 3277 days | 46% |
| Jakub Trojanek | 8/10 | 3287 days | 44% |
| Malina | 10/10 | 3293 days | 45% |
| Emma Keegan | 7/10 | 3552 days | 32% |
| Emilie Normand | 7/10 | 3622 days | 29% |
| Christopher Buch Madsen | 8/10 | 3943 days | 17% |
| Phil Bromby | 9/10 | 3945 days | 18% |
| Tobias Thull | 7/10 | 3951 days | 16% |
| Rita Hochstiasser | 8/10 | 3973 days | 16% |
| Nelle Dutilleur | 10/10 | 3994 days | 16% |
| Mathias Butterlin | 8/10 | 3994 days | 15% |
| Daryl | 8/10 | 4002 days | 15% |
| Bert Pubeg | 9/10 | 4068 days | 13% |
| Alex | 8/10 | 4372 days | 0% |
| Lucie | 9/10 | 4408 days | 21% |
| Henzen | 9/10 | 4412 days | 21% |
| Roy Barton | 9/10 | 4675 days | 21% |
| Brian Livesey | 9/10 | 4683 days | 21% |
| Merlyn | 8/10 | 4691 days | 21% |
| Beyeler | 10/10 | 4695 days | 21% |
| Ralf Glaser | 7/10 | 4695 days | 19% |
| Suzanne van Kol | 8/10 | 4700 days | 21% |
| kiwifrenchy | 10/10 | 4707 days | 21% |
| _mel_ | 9/10 | 4738 days | 21% |
| C | 10/10 | 4738 days | 21% |
| Sarah and Soren | 10/10 | 4775 days | 21% |
| Erik Folkersen | 10/10 | 4783 days | 21% |
| Rudlinger | 10/10 | 4786 days | 21% |
| GenH | 10/10 | 5013 days | 21% |
| R Tearle | 10/10 | 5022 days | 21% |
| Franzi & Tobi | 10/10 | 5024 days | 21% |
| Nathalie | 10/10 | 5028 days | 21% |
| Ven | 9/10 | 5030 days | 21% |
| Jerven and Kim | 10/10 | 5037 days | 21% |
| Sarah Luijckx | 1/10 | 5039 days | 8% |
| Alan Jeffery | 7/10 | 5040 days | 19% |
| Birgette Weiner | 9/10 | 5058 days | 21% |
| Tim Van Nispen | 9/10 | 5060 days | 21% |
| Bottcher | 10/10 | 5060 days | 21% |
| Sue & Graham Mullin | 10/10 | 5067 days | 21% |
| John Simpson | 9/10 | 5069 days | 21% |
| Karen Phillips | 9/10 | 5069 days | 21% |
| Michelle Booty | 8/10 | 5071 days | 21% |
| Nadia Husain | 7/10 | 5072 days | 19% |
| Dietmar Gans | 10/10 | 5378 days | 21% |
| Matt Roper | 10/10 | 5400 days | 21% |
| Chris Glasg | 10/10 | 5417 days | 21% |
| Jamie Hallifax | 9/10 | 5428 days | 21% |
| Paul Ritchie | 10/10 | 5432 days | 21% |
| Gerry Donoghue | 10/10 | 5451 days | 21% |
| Yvonne German | 9/10 | 5454 days | 21% |
| DebbieM | 5/10 | 5468 days | 16% |
| mj111 | 10/10 | 5468 days | 21% |
| Susann Koschmeider | 10/10 | 5503 days | 21% |
| X Otte | 10/10 | 5507 days | 21% |
| Hans Hoff | 10/10 | 5507 days | 21% |
| Solveig Mosinski | 10/10 | 5511 days | 21% |
| Val and Barnie Weir | 10/10 | 5522 days | 21% |
| Wim Put | 9/10 | 5525 days | 21% |
| discerner | 10/10 | 5529 days | 21% |
| Phillip Reade | 10/10 | 5529 days | 21% |
| Tim Beuzeval | 9/10 | 5529 days | 21% |
| barp | 9/10 | 5560 days | 21% |
| Becky Fairweather | 10/10 | 5713 days | 21% |
| David | 10/10 | 5743 days | 21% |
| martinat | 10/10 | 5743 days | 21% |
| Mike | 9/10 | 5753 days | 21% |
| MichaelS1 | 9/10 | 5759 days | 21% |
| StefanieGermany | 9/10 | 5761 days | 21% |
| Veronika | 9/10 | 5763 days | 21% |
| Ralph Boese | 7/10 | 5763 days | 19% |
| ToyalFrance | 9/10 | 5763 days | 21% |
| ReneeA | 9/10 | 5791 days | 21% |
| Lorna | 8/10 | 5793 days | 21% |
| Bruce | 10/10 | 5794 days | 21% |
| Sandra | 10/10 | 5801 days | 21% |
| Heidi | 7/10 | 5808 days | 19% |
| Philipp | 9/10 | 5808 days | 21% |
| Simon | 9/10 | 5810 days | 21% |
| Kathryn | 8/10 | 5811 days | 21% |
| Barbara | 9/10 | 5816 days | 21% |
| Joachim | 10/10 | 5816 days | 21% |
| Ans | 7/10 | 5817 days | 19% |
| Minder | 10/10 | 5818 days | 21% |
| Evi | 7/10 | 5849 days | 19% |
| Ann Maree | 9/10 | 5852 days | 21% |
| Trine | 9/10 | 5862 days | 21% |
| Carina Korn | 10/10 | 5959 days | 21% |
| Christian | 7/10 | 5959 days | 19% |
| Nick | 10/10 | 5962 days | 21% |
| Terri Scott | 7/10 | 5979 days | 19% |
| Alan Bellerby | 10/10 | 6129 days | 21% |
| Robert | 4/10 | 6135 days | 14% |
| Elise | 10/10 | 6135 days | 21% |
| Fung | 8/10 | 6135 days | 21% |
| Peter Aston | 9/10 | 6135 days | 21% |
| Tony Wicks | 8/10 | 6140 days | 21% |
| Sue | 8/10 | 6147 days | 21% |
| Carla | 9/10 | 6155 days | 21% |
| Melissa Steedman | 9/10 | 6182 days | 21% |
| Vanessa Brennan | 7/10 | 6182 days | 19% |
| Tim | 9/10 | 6183 days | 21% |
| Mary | 10/10 | 6233 days | 21% |
| Agnes | 9/10 | 6449 days | 21% |
| Cohen | 9/10 | 6469 days | 21% |
| John | 8/10 | 6473 days | 21% |
| SueLinsk | 9/10 | 6473 days | 21% |
| Frauke | 7/10 | 6515 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
-4.04% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 41 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 | -4.02% |
| 200 | -4.04% |
| 201 | -4.06% |
| 202 | -4.08% |
| 203 | -4.10% |
| … | … |
Balancing Adjustment
1.76% 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.