Ranking Score Explained

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 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.

Cymen Crick's avatar

Cymen Crick

Rankers Owner

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

73.64%

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 3145 days 99%
Anouk Jongsma 1/10 3167 days 41%
Yaiv Cohen 8/10 3190 days 100%
Tabea 9/10 3210 days 99%
Hannes Puediger 8/10 3217 days 98%
Yiying Zhang 7/10 3747 days 50%
Lena Hanhart 10/10 3897 days 40%
Igor 7/10 3900 days 37%
Jacqui Knight 9/10 3942 days 36%
Thomas Roche 4/10 3961 days 22%
Evyatar Karni 10/10 3962 days 35%
Grantygrant 2/10 4234 days 4%
Lea Roser 3/10 4251 days 4%
Jeremy Eng 4/10 4265 days 5%
Jill Fischer 3/10 4265 days 4%
Bev Stott 5/10 4271 days 5%
Maja Bogdanowicz 4/10 4272 days 4%
Jan Zimmerman 3/10 4280 days 3%
Chew (Peter) 4/10 4346 days 0%
Ryan J 9/10 4446 days 42%
Sethkins 2/10 4630 days 18%
Jason Ritenour 7/10 4812 days 40%
Ed Piotrowski 5/10 4973 days 32%
Ben Akin-Smith 4/10 4990 days 27%
Chris 10/10 4990 days 43%
Jarrett King 10/10 4997 days 43%
Jesper Hassel 7/10 5001 days 40%
Carolin Moberg 7/10 5001 days 40%
Ellen Thompson 9/10 5019 days 42%
Robin Schomburg 5/10 5021 days 32%
dollimyxture 9/10 5055 days 42%
birdsong 1/10 5300 days 16%
Jess 6/10 5335 days 37%
Dean Forrest 8/10 5351 days 42%
Arie Ascher 3/10 5368 days 22%
kararina Kosten 8/10 5383 days 42%
nigelst 8/10 5395 days 42%
Conor Coyle 6/10 5406 days 37%
Anna 8/10 5451 days 42%
Simon Bartholomew 8/10 5463 days 42%
jank 10/10 5542 days 43%
bogaard 6/10 5577 days 37%
Rose and Jess Damon and Esler 5/10 5604 days 32%
Sally477 8/10 5695 days 42%
Theresa 7/10 5731 days 40%
Amanda Williams 10/10 5735 days 43%
Mary 7/10 5829 days 40%
Ken 9/10 5861 days 42%
Michelle 9/10 5869 days 42%
John Paul 9/10 5890 days 42%
Terneal King 6/10 5933 days 37%
Tim 9/10 5947 days 42%
Katharina 6/10 6107 days 37%
Cat 3/10 6425 days 22%

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

-3.89% Adjustment

There may be an adjustment if this experience hasn't received any reviews within the last 49 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 -3.84%
198 -3.86%
199 -3.87%
200 -3.89%
201 -3.91%
202 -3.93%
203 -3.95%

Balancing Adjustment

7.14% 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

77%

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.