Kia ora, 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 The Antarctic Attraction.
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.
The Antarctic Attraction
Valid Reviews
68 Valid Reviews
The The Antarctic Attraction experience has a total of 70 reviews. There are 68 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 68 valid reviews:
| Rating | Count | Percentage | |
|---|---|---|---|
| 10/10 | 8 |
|
12% |
| 9/10 | 11 |
|
16% |
| 8/10 | 17 |
|
25% |
| 7/10 | 10 |
|
15% |
| 6/10 | 4 |
|
6% |
| 5/10 | 8 |
|
12% |
| 4/10 | 2 |
|
3% |
| 3/10 | 3 |
|
4% |
| 2/10 | 3 |
|
4% |
| 1/10 | 2 |
|
3% |
69.71% Average
The raw data average (mean) for all the The Antarctic Attraction valid reviews is 69.71% and is based on 68 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
47 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 68 valid reviews, the experience has 47 face-to-face reviews collected during interviews by our team.
Below is the distribution of ratings for the 47 face-to-face reviews:
| Rating | Count | Percentage | |
|---|---|---|---|
| 10/10 | 3 |
|
6% |
| 9/10 | 9 |
|
19% |
| 8/10 | 14 |
|
30% |
| 7/10 | 8 |
|
17% |
| 6/10 | 3 |
|
6% |
| 5/10 | 5 |
|
11% |
| 4/10 | 2 |
|
4% |
| 3/10 | 3 |
|
6% |
| 2/10 | 0 |
|
0% |
| 1/10 | 0 |
|
0% |
72.13% Average
The raw data average (mean) for all the The Antarctic Attraction face-to-face reviews is 72.13% and is based on 47 face-to-face reviews. This value is not used to calculate the ranking score and it only provided here for comparison purposes.
Weighted Average
84.12%
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 |
|---|---|---|---|
| Nina S. Larsen | 9/10 | 294 days | 100% |
| Lars Grosse | 8/10 | 2795 days | 3% |
| Per Bang | 8/10 | 2828 days | 3% |
| Bernd Giermann | 8/10 | 2872 days | 3% |
| Dubrulle | 9/10 | 2900 days | 3% |
| Mary Tan | 10/10 | 2942 days | 3% |
| Gavin Moffatt | 9/10 | 3163 days | 2% |
| Lars Schuett | 10/10 | 3229 days | 2% |
| Matt Lohmeyer | 8/10 | 3247 days | 2% |
| Thomas Stuber | 7/10 | 3268 days | 2% |
| Angela Neville | 5/10 | 3954 days | 0% |
| Neil Beckett | 5/10 | 4252 days | 0% |
| Paul Kelly | 5/10 | 4464 days | 1% |
| peterpiper | 10/10 | 4587 days | 1% |
| Kimothy | 8/10 | 4617 days | 1% |
| Delore | 4/10 | 4641 days | 0% |
| Lorna Williams | 7/10 | 4643 days | 1% |
| David & Sue Lokkerbol | 7/10 | 4663 days | 1% |
| Thyg Lingdal | 9/10 | 4676 days | 1% |
| Jerryusa57 | 10/10 | 4677 days | 1% |
| pauls1892 | 10/10 | 4677 days | 1% |
| qofd | 6/10 | 4953 days | 1% |
| Jeff Cerjan | 8/10 | 5021 days | 1% |
| Andrew Hammond | 7/10 | 5165 days | 1% |
| Lloyd Shephard | 8/10 | 5369 days | 1% |
| Arnold | 8/10 | 5370 days | 1% |
| hughesW | 8/10 | 5379 days | 1% |
| Chance McGuire | 10/10 | 5407 days | 1% |
| Peter Ortner | 8/10 | 5416 days | 1% |
| Buss | 7/10 | 5420 days | 1% |
| Chung Family | 6/10 | 5427 days | 1% |
| middendorp | 5/10 | 5453 days | 1% |
| alasiac | 8/10 | 5469 days | 1% |
| Deede K | 9/10 | 5477 days | 1% |
| Bruce_M | 1/10 | 5560 days | 0% |
| andriesk | 5/10 | 5595 days | 1% |
| joevw | 3/10 | 5668 days | 0% |
| Johnnie | 8/10 | 5694 days | 1% |
| pattie | 1/10 | 5713 days | 0% |
| MarkP | 8/10 | 5713 days | 1% |
| Sally477 | 7/10 | 5714 days | 1% |
| VenesJ | 7/10 | 5733 days | 1% |
| Jan | 6/10 | 5744 days | 1% |
| CharlotteC | 8/10 | 5748 days | 1% |
| kate Smith | 2/10 | 5764 days | 0% |
| Rory | 4/10 | 5776 days | 0% |
| Jan | 7/10 | 5778 days | 1% |
| max deloare | 2/10 | 5787 days | 0% |
| Debbie Mossman | 5/10 | 5788 days | 1% |
| stueug | 9/10 | 5864 days | 1% |
| Ken | 10/10 | 5880 days | 1% |
| Sam Prior | 3/10 | 5929 days | 0% |
| Mark Coffey | 2/10 | 5956 days | 0% |
| fgregory | 8/10 | 5976 days | 1% |
| Lorraine Wallis | 9/10 | 6079 days | 1% |
| Chrysa Charitou | 9/10 | 6079 days | 1% |
| Teresa Wallis | 9/10 | 6079 days | 1% |
| Nicole | 8/10 | 6096 days | 1% |
| Orla Hansen | 10/10 | 6105 days | 1% |
| Paul McDonell | 8/10 | 6105 days | 1% |
| Rebekah Holbrook | 9/10 | 6141 days | 1% |
| Simon Chettleburgh | 7/10 | 6141 days | 1% |
| Aske Helbor | 3/10 | 6156 days | 0% |
| ranker_734 | 5/10 | 6156 days | 1% |
| Rene Schotvanger | 7/10 | 6315 days | 1% |
| Andy | 6/10 | 6485 days | 1% |
| Sandra | 5/10 | 6485 days | 1% |
| Dave | 9/10 | 6490 days | 1% |
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 The Antarctic Attraction experience has plenty of reviews and does not meet the criteria for any adjustment.
Recent Reviews Adjustment
-0.26% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 43 days. However the The Antarctic Attraction 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 The Antarctic Attraction experience has been adjusted for 13 days. Adjustments are according to the following table.
| Days | Adjustment |
|---|---|
| … | … |
| 10 | -0.20% |
| 11 | -0.22% |
| 12 | -0.24% |
| 13 | -0.26% |
| 14 | -0.28% |
| 15 | -0.30% |
| 16 | -0.32% |
| … | … |
Balancing Adjustment
2.05% 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
86%
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.