Ranking Score Explained

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 Canterbury Museum.

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

Canterbury Museum

Valid Reviews

66 Valid Reviews

The Canterbury Museum experience has a total of 66 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 66 valid reviews:

Rating Count Percentage
10/10 20
30%
9/10 19
29%
8/10 13
20%
7/10 11
17%
6/10 2
3%
5/10 1
2%
4/10 0
0%
3/10 0
0%
2/10 0
0%
1/10 0
0%

86.21% Average

The raw data average (mean) for all the Canterbury Museum valid reviews is 86.21% and is based on 66 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

56 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 66 valid reviews, the experience has 56 face-to-face reviews collected during interviews by our team.

Below is the distribution of ratings for the 56 face-to-face reviews:

Rating Count Percentage
10/10 15
27%
9/10 15
27%
8/10 13
23%
7/10 10
18%
6/10 2
4%
5/10 1
2%
4/10 0
0%
3/10 0
0%
2/10 0
0%
1/10 0
0%

85.00% Average

The raw data average (mean) for all the Canterbury Museum face-to-face reviews is 85.00% and is based on 56 face-to-face reviews. This value is not used to calculate the ranking score and it only provided here for comparison purposes.

Weighted Average

85.43%

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
Susanne 9/10 2854 days 100%
Zak Jan 7/10 2893 days 92%
Tereza Nemeckova 10/10 2902 days 98%
Anna 9/10 2908 days 96%
Anna Urbanova 8/10 2940 days 93%
Melle Eleinga 8/10 3065 days 85%
Camilla Geert 7/10 3149 days 76%
Madelaine Sirch 9/10 3150 days 80%
Lisa Fenzl 6/10 3157 days 69%
Lionel Seramis 9/10 3175 days 79%
Anna Guttle 8/10 3211 days 76%
Tarillon Family 9/10 3525 days 56%
Kilian Vos 7/10 3610 days 47%
Ara Moore-Tuwhangai 10/10 3808 days 37%
angela neilsen 10/10 3808 days 37%
Manuela 9/10 3869 days 33%
Siobhan Mee 10/10 3899 days 31%
Fenna Newmann 8/10 3907 days 30%
Mara K 9/10 3928 days 29%
Julien de la lande 8/10 3941 days 28%
Aude Moulin 10/10 3941 days 28%
Claire Lieval 10/10 3947 days 28%
Pia Pitkala 9/10 4254 days 7%
Kevin Tranter 9/10 4272 days 6%
Peter Simpson 10/10 4293 days 5%
Mathieu Brias 8/10 4311 days 4%
Eric and Jen Popma 10/10 4365 days 0%
TheClan 10/10 4446 days 33%
Matthias Angela 7/10 4624 days 31%
Signe Kaspersen 10/10 4624 days 33%
Jaap & Susanne 9/10 4639 days 33%
Rene Jakel 9/10 4992 days 33%
Elise van Haastert 9/10 4995 days 33%
Stevenson 10/10 5017 days 33%
Friedli Manuela 10/10 5019 days 33%
Rosey834 10/10 5055 days 33%
Janny en Bert 8/10 5351 days 32%
johnandgin 10/10 5361 days 33%
Tanya Fitzgibbon 5/10 5362 days 25%
Dutertre Annaboue 7/10 5362 days 31%
Jules 7/10 5386 days 31%
Rob 9/10 5387 days 33%
Frances Hay 8/10 5388 days 32%
Suzanne 9/10 5512 days 33%
bertel 10/10 5578 days 33%
DustyLaptop 9/10 5634 days 33%
TillE412 10/10 5679 days 33%
geoffelizabeth 9/10 5695 days 33%
MarkP 8/10 5695 days 32%
Visken 10/10 5738 days 33%
David_H 8/10 5754 days 32%
Temo 7/10 5943 days 31%
Georgina Mulligan 7/10 6014 days 31%
Sandra Verbaarschot 9/10 6075 days 33%
Yayami Kimura 7/10 6078 days 31%
Ray 10/10 6081 days 33%
Eon Alers 7/10 6085 days 31%
Orla Hansen 10/10 6087 days 33%
Paul McDonell 8/10 6087 days 32%
Jurgen Westphal 8/10 6095 days 32%
Roger & Margaret 9/10 6095 days 33%
Matthieu Gernez 6/10 6096 days 28%
Withkin 10/10 6096 days 33%
Wayne Best 8/10 6131 days 32%
Gabriel Faber 9/10 6170 days 33%
Renee 7/10 6435 days 31%

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 Canterbury Museum 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 Canterbury Museum 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 Canterbury Museum 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

2.59% 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

84%

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.