Hi, 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 Cadbury World.
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.
Cadbury World
Valid Reviews
54 Valid Reviews
The Cadbury World experience has a total of 54 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 54 valid reviews:
| Rating | Count | Percentage | |
|---|---|---|---|
| 10/10 | 6 |
|
11% |
| 9/10 | 9 |
|
17% |
| 8/10 | 8 |
|
15% |
| 7/10 | 8 |
|
15% |
| 6/10 | 5 |
|
9% |
| 5/10 | 4 |
|
7% |
| 4/10 | 5 |
|
9% |
| 3/10 | 5 |
|
9% |
| 2/10 | 2 |
|
4% |
| 1/10 | 2 |
|
4% |
65.19% Average
The raw data average (mean) for all the Cadbury World valid reviews is 65.19% and is based on 54 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
39 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 54 valid reviews, the experience has 39 face-to-face reviews collected during interviews by our team.
Below is the distribution of ratings for the 39 face-to-face reviews:
| Rating | Count | Percentage | |
|---|---|---|---|
| 10/10 | 5 |
|
13% |
| 9/10 | 6 |
|
15% |
| 8/10 | 6 |
|
15% |
| 7/10 | 6 |
|
15% |
| 6/10 | 4 |
|
10% |
| 5/10 | 3 |
|
8% |
| 4/10 | 4 |
|
10% |
| 3/10 | 4 |
|
10% |
| 2/10 | 0 |
|
0% |
| 1/10 | 1 |
|
3% |
67.18% Average
The raw data average (mean) for all the Cadbury World face-to-face reviews is 67.18% and is based on 39 face-to-face reviews. This value is not used to calculate the ranking score and it only provided here for comparison purposes.
Weighted Average
70.66%
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 |
|---|---|---|---|
| Teresa | 7/10 | 3780 days | 100% |
| Anouk Jongsma | 1/10 | 3802 days | 8% |
| Yaiv Cohen | 8/10 | 3825 days | 96% |
| Tabea | 9/10 | 3845 days | 92% |
| Hannes Puediger | 8/10 | 3852 days | 88% |
| Yiying Zhang | 7/10 | 4381 days | 76% |
| Lena Hanhart | 10/10 | 4532 days | 86% |
| Igor | 7/10 | 4535 days | 76% |
| Jacqui Knight | 9/10 | 4577 days | 85% |
| Thomas Roche | 4/10 | 4596 days | 36% |
| Evyatar Karni | 10/10 | 4597 days | 86% |
| Grantygrant | 2/10 | 4869 days | 7% |
| Lea Roser | 3/10 | 4886 days | 20% |
| Jeremy Eng | 4/10 | 4900 days | 36% |
| Jill Fischer | 3/10 | 4900 days | 20% |
| Bev Stott | 5/10 | 4906 days | 52% |
| Maja Bogdanowicz | 4/10 | 4907 days | 36% |
| Jan Zimmerman | 3/10 | 4915 days | 20% |
| Chew (Peter) | 4/10 | 4981 days | 36% |
| Ryan J | 9/10 | 5080 days | 85% |
| Sethkins | 2/10 | 5265 days | 7% |
| Jason Ritenour | 7/10 | 5446 days | 76% |
| Ed Piotrowski | 5/10 | 5608 days | 52% |
| Ben Akin-Smith | 4/10 | 5625 days | 36% |
| Chris | 10/10 | 5625 days | 86% |
| Jarrett King | 10/10 | 5632 days | 86% |
| Jesper Hassel | 7/10 | 5636 days | 76% |
| Carolin Moberg | 7/10 | 5636 days | 76% |
| Ellen Thompson | 9/10 | 5654 days | 85% |
| Robin Schomburg | 5/10 | 5656 days | 52% |
| dollimyxture | 9/10 | 5690 days | 85% |
| birdsong | 1/10 | 5934 days | 0% |
| Jess | 6/10 | 5970 days | 66% |
| Dean Forrest | 8/10 | 5986 days | 84% |
| Arie Ascher | 3/10 | 6003 days | 20% |
| kararina Kosten | 8/10 | 6018 days | 84% |
| nigelst | 8/10 | 6030 days | 84% |
| Conor Coyle | 6/10 | 6041 days | 66% |
| Anna | 8/10 | 6086 days | 84% |
| Simon Bartholomew | 8/10 | 6098 days | 84% |
| jank | 10/10 | 6176 days | 86% |
| bogaard | 6/10 | 6211 days | 66% |
| Rose and Jess Damon and Esler | 5/10 | 6238 days | 52% |
| Sally477 | 8/10 | 6330 days | 84% |
| Theresa | 7/10 | 6366 days | 76% |
| Amanda Williams | 10/10 | 6370 days | 86% |
| Mary | 7/10 | 6464 days | 76% |
| Ken | 9/10 | 6496 days | 85% |
| Michelle | 9/10 | 6504 days | 85% |
| John Paul | 9/10 | 6525 days | 85% |
| Terneal King | 6/10 | 6568 days | 66% |
| Tim | 9/10 | 6582 days | 85% |
| Katharina | 6/10 | 6742 days | 66% |
| Cat | 3/10 | 7059 days | 20% |
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 Cadbury World experience has plenty of reviews and does not meet the criteria for any adjustment.
Recent Reviews Adjustment
-2.08% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 123 days. However the Cadbury World 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 Cadbury World experience has been adjusted for 200 days. Adjustments are according to the following table.
| Days | Adjustment |
|---|---|
| … | … |
| 197 | -2.05% |
| 198 | -2.06% |
| 199 | -2.07% |
| 200 | -2.08% |
| 201 | -2.09% |
| 202 | -2.11% |
| 203 | -2.12% |
| … | … |
Balancing Adjustment
7.83% 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
76%
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.