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 1709 days 100%
Beatrice and Cyrill 10/10 1823 days 94%
Yiying Zhang 5/10 2472 days 47%
Patricia Revel 7/10 2595 days 47%
Jacques Revel 7/10 2595 days 47%
Bjorn Van Mulders 10/10 2694 days 47%
Kim Maertens 9/10 2694 days 47%
Jean Ch 10/10 2837 days 39%
Peter Adams 10/10 3349 days 12%
Laura Diepeveen 9/10 3360 days 11%
Kasten Madsen 9/10 3364 days 11%
Baas 8/10 3364 days 10%
Karl Brachtl 10/10 3364 days 11%
Marian Stolker 9/10 3371 days 11%
Ursi Meier 10/10 3378 days 10%
Helle Thomsen 10/10 3462 days 6%
jenckes 1/10 3537 days 0%
KatieW85 10/10 3568 days 0%
Phill2517 8/10 3660 days 22%
JennyAndFelix 10/10 3690 days 23%
Mark Walker 7/10 3709 days 21%
Keith Ogley 9/10 3715 days 23%
Betten 10/10 3720 days 23%
khs 9/10 3721 days 23%
Marco Schoeggl 9/10 3723 days 23%
Danny and Loreen Way 7/10 3737 days 21%
Remco Smit 8/10 3745 days 22%
pamaho 10/10 3811 days 23%
MarcyMark 10/10 4055 days 23%
john england 10/10 4114 days 23%
Stephanie K 10/10 4127 days 23%
AndyL 10/10 4176 days 23%
naturelover 10/10 4365 days 23%
jjakkeren 8/10 4420 days 22%
Greg18 9/10 4451 days 23%
Louise 10/10 4460 days 23%
John&Denise 10/10 4463 days 23%
Christoph 10/10 4479 days 23%
Kristen 9/10 4493 days 23%
Claire 6/10 4505 days 18%
Aileen 9/10 4538 days 23%
Katie Mitchell 10/10 4571 days 23%
Klaus 8/10 4811 days 22%
Claire Masling 10/10 4820 days 23%
Thomas 8/10 4834 days 22%
Timothy 7/10 4866 days 21%
Gerber Liselotte 10/10 4894 days 23%
Will 7/10 5136 days 21%
Sharon 10/10 5179 days 23%


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

-2.96% Adjustment

There may be an adjustment if this experience hasn't received any reviews within the last 84 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 -2.91%
198 -2.93%
199 -2.94%
200 -2.96%
201 -2.97%
202 -2.99%
203 -3.00%

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.