Ranking Score Explained

Hi there, 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 Elm Wildlife 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.

Nick Morrison's avatar

Nick Morrison

Rankers owner

Elm Wildlife Tours

Valid Reviews

49 Valid Reviews

The Elm Wildlife Tours experience has a total of 51 reviews. There are 49 valid reviews that are included when calculating the ranking score and 2 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 49 valid reviews:

Rating Count Percentage
10/10 24
9/10 10
8/10 6
7/10 6
6/10 1
5/10 1
4/10 0
3/10 0
2/10 0
1/10 1

88.16% Average

The raw data average (mean) for all the Elm Wildlife Tours valid reviews is 88.16% and is based on 49 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

33 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 49 valid reviews, the experience has 33 face-to-face reviews collected during interviews by our team.

Below is the distribution of ratings for the 33 face-to-face reviews:

Rating Count Percentage
10/10 14
9/10 8
8/10 5
7/10 6
6/10 0
5/10 0
4/10 0
3/10 0
2/10 0
1/10 0

89.09% Average

The raw data average (mean) for all the Elm Wildlife Tours face-to-face reviews is 89.09% and is based on 33 face-to-face reviews. This value is not used to calculate the ranking score and it only provided here for comparison purposes.

Weighted Average


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
Catherine Skow 10/10 567 days 100%
Beatrice and Cyrill 10/10 680 days 78%
Yiying Zhang 5/10 1329 days 7%
Patricia Revel 7/10 1452 days 9%
Jacques Revel 7/10 1452 days 9%
Bjorn Van Mulders 10/10 1551 days 9%
Kim Maertens 9/10 1551 days 9%
Jean Ch 10/10 1694 days 6%
Peter Adams 10/10 2206 days 6%
Laura Diepeveen 9/10 2217 days 6%
Kasten Madsen 9/10 2221 days 6%
Baas 8/10 2221 days 6%
Karl Brachtl 10/10 2221 days 6%
Marian Stolker 9/10 2228 days 6%
Ursi Meier 10/10 2235 days 6%
Helle Thomsen 10/10 2319 days 6%
jenckes 1/10 2394 days 3%
KatieW85 10/10 2425 days 4%
Phill2517 8/10 2517 days 4%
JennyAndFelix 10/10 2547 days 4%
Mark Walker 7/10 2566 days 5%
Keith Ogley 9/10 2572 days 5%
Betten 10/10 2577 days 5%
khs 9/10 2578 days 4%
Marco Schoeggl 9/10 2580 days 5%
Danny and Loreen Way 7/10 2594 days 5%
Remco Smit 8/10 2602 days 5%
pamaho 10/10 2668 days 3%
MarcyMark 10/10 2912 days 3%
john england 10/10 2971 days 3%
Stephanie K 10/10 2984 days 4%
AndyL 10/10 3033 days 2%
naturelover 10/10 3222 days 3%
jjakkeren 8/10 3277 days 3%
Greg18 9/10 3308 days 2%
Louise 10/10 3318 days 2%
John&Denise 10/10 3320 days 2%
Christoph 10/10 3336 days 2%
Kristen 9/10 3350 days 2%
Claire 6/10 3363 days 2%
Aileen 9/10 3395 days 2%
Katie Mitchell 10/10 3428 days 1%
Klaus 8/10 3668 days 1%
Claire Masling 10/10 3677 days 1%
Thomas 8/10 3691 days 1%
Timothy 7/10 3723 days 1%
Gerber Liselotte 10/10 3751 days 1%
Will 7/10 3993 days 0%
Sharon 10/10 4036 days 0%


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 Elm Wildlife Tours experience has plenty of reviews and does not meet the criteria for any adjustment.

Recent Reviews Adjustment

-7.28% Adjustment

There may be an adjustment if an experience hasn't received any reviews within the last 60 days. However the Elm Wildlife 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 364 days.

The Elm Wildlife Tours experience has been adjusted for 364 days. Adjustments are according to the following table.

Days Adjustment
361 -7.22%
362 -7.24%
363 -7.26%
364 -7.28%
365 -7.30%
366 -7.32%
367 -7.34%

Final Ranking Score


The final ranking score once adjustments and rounding has been applied. This value is cached and recalculated each day. Therefore it may not be precisely accurate based on the other values presented.

If you have any questions or comments about our ranking score calculation please get in touch at info@rankers.co.nz.