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 Akaroa Dolphins.

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

Akaroa Dolphins

Valid Reviews

76 Valid Reviews

The Akaroa Dolphins experience has a total of 77 reviews. There are 76 valid reviews that are included when calculating the ranking score and 1 invalid review 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 76 valid reviews:

Rating Count Percentage
10/10 32
42%
9/10 23
30%
8/10 15
20%
7/10 3
4%
6/10 3
4%
5/10 0
0%
4/10 0
0%
3/10 0
0%
2/10 0
0%
1/10 0
0%

90.26% Average

The raw data average (mean) for all the Akaroa Dolphins valid reviews is 90.26% and is based on 76 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

59 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 76 valid reviews, the experience has 59 face-to-face reviews collected during interviews by our team.

Below is the distribution of ratings for the 59 face-to-face reviews:

Rating Count Percentage
10/10 19
32%
9/10 20
34%
8/10 14
24%
7/10 3
5%
6/10 3
5%
5/10 0
0%
4/10 0
0%
3/10 0
0%
2/10 0
0%
1/10 0
0%

88.31% Average

The raw data average (mean) for all the Akaroa Dolphins face-to-face reviews is 88.31% and is based on 59 face-to-face reviews. This value is not used to calculate the ranking score and it only provided here for comparison purposes.

Weighted Average

94.54%

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 Face-to-Face Weight Relative Weight
Inga Hoffmann 10/10 200 days 93.66 100%
Freddrick Weiser 9/10 537 days 54.3 58%
Mike Dw 9/10 653 days true 35.96 38%
Nolwen 9/10 1013 days true 6.07 6%
The Beans 10/10 1021 days 5.87 6%
Ross D 10/10 1027 days true 5.73 6%
Peter Passlack 10/10 1030 days 5.67 6%
Chea Hao Wong 10/10 1082 days 5.03 5%
Caroline Shaw 10/10 1252 days true 4.76 5%
Pierre Mathis 10/10 1263 days true 4.74 5%
Brenda Oomen 10/10 1266 days true 4.74 5%
Estelle Daniel 10/10 1270 days 4.73 5%
Kim-Lara 8/10 1285 days true 4.48 5%
Tamara 10/10 1299 days true 4.69 5%
Sandra P 10/10 1326 days 4.65 5%
Marie Schmid 10/10 1654 days true 4.15 4%
Angie Cairns 10/10 1684 days true 4.1 4%
Jimmy Shaw 10/10 1937 days 3.72 4%
Wendy Hawkins 8/10 2358 days true 2.92 3%
Roger Hawkins 9/10 2358 days true 3.08 3%
Tanja Schlagermann 10/10 2365 days true 3.07 3%
Alexander Mukasa 10/10 2365 days true 3.07 3%
Erik Muchembled 10/10 2367 days true 3.06 3%
Andrea Lang 8/10 2369 days true 2.91 3%
Xtian_P 10/10 2453 days 2.93 3%
michellephil 10/10 2514 days 2.84 3%
nztintin 10/10 2728 days 2.51 3%
mandd 10/10 2728 days 2.51 3%
Orlando 9/10 2740 days true 2.5 3%
Uwe Herrdum 9/10 2744 days true 2.49 3%
Francis Corrigan 9/10 2758 days true 2.47 3%
John & Vicki 9/10 2835 days true 2.35 3%
G Tulloch 9/10 3057 days true 2.01 2%
Edward Marhi 8/10 3060 days true 1.91 2%
Robin Adair 9/10 3081 days true 1.98 2%
Sandra Schulz 9/10 3088 days true 1.97 2%
Derek Puplett 9/10 3098 days true 1.95 2%
Martin Current 9/10 3109 days true 1.93 2%
Hartmut Vogt 10/10 3110 days true 1.93 2%
allesca 9/10 3214 days 1.77 2%
Mary Van 8/10 3275 days 1.6 2%
penz 9/10 3337 days 1.59 2%
victoriauk 8/10 3367 days true 1.46 2%
Susanne Strassmann 6/10 3465 days true 1.16 1%
M Sicard 9/10 3469 days true 1.39 1%
Lasse Olesen 9/10 3480 days true 1.37 1%
Keith Wilde 8/10 3482 days true 1.3 1%
Sarah Goeckener 9/10 3559 days true 1.25 1%
katharina 10/10 3559 days true 1.25 1%
Katrin Wennin 8/10 3560 days true 1.19 1%
Thorben Thede 9/10 3561 days true 1.25 1%
Roma 10/10 3572 days true 1.23 1%
HairyHaggis 10/10 3579 days 1.22 1%
Ronny 6/10 3798 days true 0.74 1%
ChristinaV 10/10 3802 days true 0.88 1%
JudithLehr 6/10 3805 days true 0.73 1%
Steven 10/10 3809 days true 0.87 1%
StijnH 8/10 3810 days true 0.82 1%
FramiskaH 8/10 3811 days true 0.82 1%
StefanGermany1 8/10 3811 days true 0.82 1%
JaninaF 10/10 3811 days true 0.87 1%
Tatjane 9/10 3824 days true 0.85 1%
XaviG 9/10 3827 days true 0.84 1%
JesusB 7/10 3827 days true 0.77 1%
Denk 8/10 3855 days true 0.76 1%
Katie Mitchell 10/10 3944 days 0.66 1%
Ben Ackland 8/10 4180 days true 0.29 0%
Tessa McCormick 8/10 4190 days true 0.27 0%
John Beirne 10/10 4547 days true 0.0 0%
ranker_110 7/10 4551 days true 0.0 0%
Christine 10/10 4556 days true 0.0 0%
Helle 9/10 4558 days true 0.0 0%
John 7/10 4558 days true 0.0 0%
Reggie 10/10 4559 days true 0.0 0%
Dave 9/10 4570 days true 0.0 0%
Beate 8/10 4571 days true 0.0 0%

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 Akaroa Dolphins experience has plenty of reviews and does not meet the criteria for any adjustment.

Recent Reviews Adjustment

-3.22% Adjustment

There may be an adjustment if an experience hasn't received any reviews within the last 60 days. However the Akaroa Dolphins 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 199 days.

The Akaroa Dolphins experience has been adjusted for 161 days. Adjustments are according to the following table.

Days Adjustment
158 -3.16%
159 -3.18%
160 -3.20%
161 -3.22%
162 -3.24%
163 -3.26%
164 -3.28%

Final Ranking Score

91%

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.