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 1917 days 100%
Beatrice and Cyrill 10/10 2031 days 93%
Yiying Zhang 5/10 2680 days 43%
Patricia Revel 7/10 2803 days 42%
Jacques Revel 7/10 2803 days 42%
Bjorn Van Mulders 10/10 2902 days 41%
Kim Maertens 9/10 2902 days 41%
Jean Ch 10/10 3045 days 32%
Peter Adams 10/10 3557 days 2%
Laura Diepeveen 9/10 3568 days 1%
Kasten Madsen 9/10 3572 days 1%
Baas 8/10 3572 days 1%
Karl Brachtl 10/10 3572 days 1%
Marian Stolker 9/10 3579 days 0%
Ursi Meier 10/10 3586 days 0%
Helle Thomsen 10/10 3670 days 27%
jenckes 1/10 3745 days 19%
KatieW85 10/10 3776 days 27%
Phill2517 8/10 3868 days 25%
JennyAndFelix 10/10 3898 days 27%
Mark Walker 7/10 3917 days 24%
Keith Ogley 9/10 3923 days 27%
Betten 10/10 3928 days 27%
khs 9/10 3929 days 27%
Marco Schoeggl 9/10 3931 days 27%
Danny and Loreen Way 7/10 3945 days 24%
Remco Smit 8/10 3953 days 25%
pamaho 10/10 4019 days 27%
MarcyMark 10/10 4263 days 27%
john england 10/10 4322 days 27%
Stephanie K 10/10 4335 days 27%
AndyL 10/10 4384 days 27%
naturelover 10/10 4573 days 27%
jjakkeren 8/10 4628 days 25%
Greg18 9/10 4659 days 27%
Louise 10/10 4668 days 27%
John&Denise 10/10 4671 days 27%
Christoph 10/10 4687 days 27%
Kristen 9/10 4701 days 27%
Claire 6/10 4713 days 22%
Aileen 9/10 4746 days 27%
Katie Mitchell 10/10 4779 days 27%
Klaus 8/10 5019 days 25%
Claire Masling 10/10 5028 days 27%
Thomas 8/10 5042 days 25%
Timothy 7/10 5074 days 24%
Gerber Liselotte 10/10 5102 days 27%
Will 7/10 5344 days 24%
Sharon 10/10 5387 days 27%


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

-4.07% Adjustment

There may be an adjustment if this experience hasn't received any reviews within the last 43 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 200 days. Due to the seasonal nature of many businesses, this adjustment is applied dynamically throughout the year.

The Elm Wildlife Tours experience has been adjusted for 200 days. Adjustments are according to the following table.

Days Adjustment
197 -4.01%
198 -4.03%
199 -4.05%
200 -4.07%
201 -4.09%
202 -4.11%
203 -4.13%

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.