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

85.57%

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 2895 days 100%
Zak Jan 7/10 2934 days 91%
Tereza Nemeckova 10/10 2943 days 98%
Anna 9/10 2949 days 96%
Anna Urbanova 8/10 2981 days 93%
Melle Eleinga 8/10 3106 days 85%
Camilla Geert 7/10 3190 days 75%
Madelaine Sirch 9/10 3191 days 80%
Lisa Fenzl 6/10 3198 days 69%
Lionel Seramis 9/10 3216 days 78%
Anna Guttle 8/10 3252 days 75%
Tarillon Family 9/10 3566 days 54%
Kilian Vos 7/10 3651 days 45%
Ara Moore-Tuwhangai 10/10 3849 days 35%
angela neilsen 10/10 3849 days 35%
Manuela 9/10 3910 days 30%
Siobhan Mee 10/10 3940 days 29%
Fenna Newmann 8/10 3948 days 27%
Mara K 9/10 3969 days 26%
Julien de la lande 8/10 3982 days 25%
Aude Moulin 10/10 3982 days 26%
Claire Lieval 10/10 3988 days 25%
Pia Pitkala 9/10 4295 days 4%
Kevin Tranter 9/10 4313 days 3%
Peter Simpson 10/10 4334 days 1%
Mathieu Brias 8/10 4352 days 0%
Eric and Jen Popma 10/10 4406 days 34%
TheClan 10/10 4487 days 34%
Matthias Angela 7/10 4665 days 31%
Signe Kaspersen 10/10 4665 days 34%
Jaap & Susanne 9/10 4680 days 33%
Rene Jakel 9/10 5033 days 33%
Elise van Haastert 9/10 5036 days 33%
Stevenson 10/10 5058 days 34%
Friedli Manuela 10/10 5060 days 34%
Rosey834 10/10 5096 days 34%
Janny en Bert 8/10 5392 days 33%
johnandgin 10/10 5402 days 34%
Tanya Fitzgibbon 5/10 5403 days 25%
Dutertre Annaboue 7/10 5403 days 31%
Jules 7/10 5427 days 31%
Rob 9/10 5428 days 33%
Frances Hay 8/10 5429 days 33%
Suzanne 9/10 5553 days 33%
bertel 10/10 5619 days 34%
DustyLaptop 9/10 5675 days 33%
TillE412 10/10 5720 days 34%
geoffelizabeth 9/10 5736 days 33%
MarkP 8/10 5736 days 33%
Visken 10/10 5780 days 34%
David_H 8/10 5795 days 33%
Temo 7/10 5985 days 31%
Georgina Mulligan 7/10 6056 days 31%
Sandra Verbaarschot 9/10 6116 days 33%
Yayami Kimura 7/10 6119 days 31%
Ray 10/10 6122 days 34%
Eon Alers 7/10 6126 days 31%
Orla Hansen 10/10 6128 days 34%
Paul McDonell 8/10 6128 days 33%
Jurgen Westphal 8/10 6136 days 33%
Roger & Margaret 9/10 6137 days 33%
Matthieu Gernez 6/10 6137 days 29%
Withkin 10/10 6137 days 34%
Wayne Best 8/10 6172 days 33%
Gabriel Faber 9/10 6211 days 33%
Renee 7/10 6476 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

-4.06% Adjustment

There may be an adjustment if this experience hasn't received any reviews within the last 42 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 -4.00%
198 -4.02%
199 -4.04%
200 -4.06%
201 -4.08%
202 -4.10%
203 -4.12%

Balancing Adjustment

2.60% 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.