Hey, 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 Southern Discoveries.
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.
Southern Discoveries
Valid Reviews
203 Valid Reviews
The Southern Discoveries experience has a total of 204 reviews. There are 203 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 203 valid reviews:
| Rating | Count | Percentage | |
|---|---|---|---|
| 10/10 | 64 |
|
32% |
| 9/10 | 60 |
|
30% |
| 8/10 | 48 |
|
24% |
| 7/10 | 21 |
|
10% |
| 6/10 | 5 |
|
2% |
| 5/10 | 3 |
|
1% |
| 4/10 | 0 |
|
0% |
| 3/10 | 0 |
|
0% |
| 2/10 | 0 |
|
0% |
| 1/10 | 2 |
|
1% |
86.60% Average
The raw data average (mean) for all the Southern Discoveries valid reviews is 86.60% and is based on 203 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
186 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 203 valid reviews, the experience has 186 face-to-face reviews collected during interviews by our team.
Below is the distribution of ratings for the 186 face-to-face reviews:
| Rating | Count | Percentage | |
|---|---|---|---|
| 10/10 | 55 |
|
30% |
| 9/10 | 58 |
|
31% |
| 8/10 | 47 |
|
25% |
| 7/10 | 18 |
|
10% |
| 6/10 | 5 |
|
3% |
| 5/10 | 3 |
|
2% |
| 4/10 | 0 |
|
0% |
| 3/10 | 0 |
|
0% |
| 2/10 | 0 |
|
0% |
| 1/10 | 0 |
|
0% |
87.04% Average
The raw data average (mean) for all the Southern Discoveries face-to-face reviews is 87.04% and is based on 186 face-to-face reviews. This value is not used to calculate the ranking score and it only provided here for comparison purposes.
Weighted Average
79.10%
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 |
|---|---|---|---|
| Gabriel certeza | 9/10 | 251 days | 100% |
| Chris Creed | 10/10 | 463 days | 92% |
| Hirash | 1/10 | 525 days | 36% |
| Kat | 1/10 | 616 days | 33% |
| Remy and Rebecca Mans | 6/10 | 3363 days | 2% |
| Jocelyn Booy | 9/10 | 3388 days | 2% |
| David Horley | 7/10 | 3402 days | 2% |
| Vallee Manon | 9/10 | 3435 days | 2% |
| Nanda Dyke | 9/10 | 3461 days | 2% |
| victor diego | 7/10 | 3479 days | 2% |
| Samuel Michalak | 10/10 | 3484 days | 2% |
| Laura Munguira Vadillo | 10/10 | 3708 days | 1% |
| Benedikt Hang | 8/10 | 3715 days | 1% |
| Jorge Gonzoleis | 8/10 | 3718 days | 1% |
| Lauren Goebel | 10/10 | 3722 days | 1% |
| Rahel Baufeld | 8/10 | 3730 days | 1% |
| Peter Hodgson | 10/10 | 3756 days | 1% |
| doug fiddes | 10/10 | 3782 days | 1% |
| Dan Wilson | 7/10 | 3798 days | 1% |
| Corrie Medinea | 8/10 | 3806 days | 1% |
| Gracen Verheryden | 10/10 | 3809 days | 1% |
| Jennifer Hoyles | 10/10 | 3813 days | 1% |
| Lenka Korinkova | 7/10 | 4075 days | 1% |
| Rebecca Wharton | 9/10 | 4103 days | 1% |
| Andy Jobst | 8/10 | 4178 days | 0% |
| Rawiri johnston | 10/10 | 4361 days | 0% |
| Marek Heiurich | 7/10 | 4431 days | 1% |
| Matt Weston | 10/10 | 4436 days | 1% |
| Henrik Bours | 8/10 | 4437 days | 1% |
| Svenja Trubenbach | 9/10 | 4437 days | 1% |
| Sheila Galpin | 9/10 | 4451 days | 1% |
| Guillaume | 9/10 | 4462 days | 1% |
| Andreas Jung | 9/10 | 4477 days | 1% |
| Inga Memmen | 10/10 | 4479 days | 1% |
| Alacchi Moustier | 10/10 | 4494 days | 1% |
| Guy David | 9/10 | 4502 days | 1% |
| Michael Rohn | 8/10 | 4509 days | 1% |
| Rainer | 9/10 | 4793 days | 1% |
| Clarissa Hanck | 9/10 | 4793 days | 1% |
| Michael Heuer | 9/10 | 4795 days | 1% |
| Oram Salem | 6/10 | 4795 days | 1% |
| Lea Roser | 9/10 | 4804 days | 1% |
| Jitka Krejcova | 10/10 | 4804 days | 1% |
| Michal Sturma | 9/10 | 4804 days | 1% |
| Stientje van den Heuvel | 8/10 | 4804 days | 1% |
| Tom Somers | 9/10 | 4804 days | 1% |
| Brandon Wells | 8/10 | 4805 days | 1% |
| Tim Vennewold | 9/10 | 4805 days | 1% |
| Katharina | 8/10 | 4805 days | 1% |
| Lorna and Seb | 9/10 | 4821 days | 1% |
| Kristin Denny | 8/10 | 4828 days | 1% |
| Wendy Ward | 10/10 | 4834 days | 1% |
| Michal Maly | 9/10 | 4844 days | 1% |
| Michael Nolan | 10/10 | 4846 days | 1% |
| Hanneke P | 7/10 | 4877 days | 1% |
| Katharina Pape | 8/10 | 4906 days | 1% |
| Camille | 7/10 | 4913 days | 1% |
| Petr Stepanek | 10/10 | 5175 days | 1% |
| Larry Curtiss | 10/10 | 5180 days | 1% |
| nztintin | 10/10 | 5183 days | 1% |
| Marion Hassink | 7/10 | 5189 days | 1% |
| Stam | 6/10 | 5194 days | 1% |
| Ed & Katie Riches | 8/10 | 5195 days | 1% |
| Seth & Carla | 10/10 | 5197 days | 1% |
| Peter Putz | 10/10 | 5197 days | 1% |
| Tadej Ferjan | 10/10 | 5197 days | 1% |
| Nico Welagen | 10/10 | 5198 days | 1% |
| Alan Findlay | 9/10 | 5198 days | 1% |
| Andreas Kristiansen | 10/10 | 5206 days | 1% |
| Arnoldus Bergmans | 10/10 | 5278 days | 1% |
| Kai | 10/10 | 5280 days | 1% |
| Christoph | 9/10 | 5283 days | 1% |
| Jory Singer | 8/10 | 5289 days | 1% |
| Scott & Madeleine Bancroft | 9/10 | 5294 days | 1% |
| Kimberly St Louis | 10/10 | 5488 days | 1% |
| Lisa Milton | 10/10 | 5511 days | 1% |
| Rob O'Neill | 10/10 | 5520 days | 1% |
| Laura Thrower | 10/10 | 5523 days | 1% |
| Ofir Avimeir | 8/10 | 5527 days | 1% |
| Zachary Steinberg | 9/10 | 5528 days | 1% |
| Brian Jones | 9/10 | 5528 days | 1% |
| Sarah and Uli Glas | 9/10 | 5529 days | 1% |
| Boi Sagarra | 8/10 | 5532 days | 1% |
| John Tinus | 8/10 | 5533 days | 1% |
| Stefanie | 8/10 | 5534 days | 1% |
| Alex | 8/10 | 5536 days | 1% |
| Fredrik Thornell | 8/10 | 5539 days | 1% |
| Siggi Wick | 9/10 | 5540 days | 1% |
| Bruce & Elaine Chote | 10/10 | 5541 days | 1% |
| Estel la Prado | 9/10 | 5543 days | 1% |
| Jeff and Carey Brown | 10/10 | 5548 days | 1% |
| LandJ | 7/10 | 5549 days | 1% |
| Katie Mitchell | 9/10 | 5549 days | 1% |
| Galamez | 9/10 | 5556 days | 1% |
| Mr & Mrs Mackie | 9/10 | 5559 days | 1% |
| Thomas Reidinger | 6/10 | 5563 days | 1% |
| G Elliason | 9/10 | 5563 days | 1% |
| Van den Borne | 9/10 | 5563 days | 1% |
| Laura Hayes | 10/10 | 5564 days | 1% |
| Brian Lind | 7/10 | 5564 days | 1% |
| Chloe Finster | 10/10 | 5564 days | 1% |
| Jol Balder | 8/10 | 5565 days | 1% |
| Robert Haidt | 10/10 | 5570 days | 1% |
| VisualDelight | 10/10 | 5792 days | 1% |
| lindam | 10/10 | 5883 days | 1% |
| Martina Pankova | 9/10 | 5889 days | 1% |
| Neal | 10/10 | 5927 days | 1% |
| Bouwma | 8/10 | 5935 days | 1% |
| Mattias Thorm | 9/10 | 5936 days | 1% |
| Erik Hummelmose | 8/10 | 5938 days | 1% |
| Ian E | 10/10 | 5938 days | 1% |
| Kane Chain | 9/10 | 5959 days | 1% |
| johnma | 10/10 | 5993 days | 1% |
| ingeh | 8/10 | 5997 days | 1% |
| Jerry | 8/10 | 6004 days | 1% |
| Decuq | 10/10 | 6015 days | 1% |
| Carl and Angela Rapihana | 8/10 | 6027 days | 1% |
| Graham Butt | 10/10 | 6027 days | 1% |
| tessac | 9/10 | 6129 days | 1% |
| andriesk | 9/10 | 6130 days | 1% |
| nickm | 10/10 | 6203 days | 1% |
| Sofie | 10/10 | 6218 days | 1% |
| streneer | 10/10 | 6235 days | 1% |
| ElleGermany | 9/10 | 6236 days | 1% |
| JonK | 9/10 | 6236 days | 1% |
| NicolaW | 10/10 | 6240 days | 1% |
| DirkGermany | 10/10 | 6243 days | 1% |
| Bridget | 10/10 | 6252 days | 1% |
| Roy | 9/10 | 6252 days | 1% |
| HenizV | 9/10 | 6258 days | 1% |
| CraigB | 10/10 | 6260 days | 1% |
| familytravellers | 7/10 | 6260 days | 1% |
| Rissmann | 10/10 | 6264 days | 1% |
| Sara Hansson | 10/10 | 6265 days | 1% |
| Frank | 9/10 | 6266 days | 1% |
| KurtL | 8/10 | 6266 days | 1% |
| SteveW | 8/10 | 6267 days | 1% |
| Peter Bowen-Simpkins | 9/10 | 6268 days | 1% |
| Joel | 9/10 | 6268 days | 1% |
| Suzie Lechner | 10/10 | 6268 days | 1% |
| KathrinS | 9/10 | 6268 days | 1% |
| Debbie | 7/10 | 6272 days | 1% |
| Stolz | 9/10 | 6272 days | 1% |
| Ulli | 9/10 | 6272 days | 1% |
| Tatjane | 8/10 | 6280 days | 1% |
| Claudia | 8/10 | 6280 days | 1% |
| SimonR | 8/10 | 6282 days | 1% |
| SonjaG | 9/10 | 6282 days | 1% |
| Steve | 7/10 | 6282 days | 1% |
| AdelineC | 8/10 | 6283 days | 1% |
| RobC1 | 7/10 | 6283 days | 1% |
| RichardB1 | 6/10 | 6283 days | 1% |
| JoT | 7/10 | 6283 days | 1% |
| Olly | 10/10 | 6284 days | 1% |
| Klaus | 9/10 | 6285 days | 1% |
| JanetH | 8/10 | 6296 days | 1% |
| StefanieW | 8/10 | 6298 days | 1% |
| schenk | 8/10 | 6299 days | 1% |
| groenewold | 7/10 | 6313 days | 1% |
| Jessy | 5/10 | 6313 days | 1% |
| Wilco | 7/10 | 6320 days | 1% |
| Bernd | 8/10 | 6321 days | 1% |
| Ruben | 8/10 | 6321 days | 1% |
| Paul | 10/10 | 6325 days | 1% |
| Loren | 10/10 | 6352 days | 1% |
| DavidO | 8/10 | 6355 days | 1% |
| Peter | 9/10 | 6361 days | 1% |
| David | 10/10 | 6361 days | 1% |
| Kylie | 8/10 | 6365 days | 1% |
| Ursula | 9/10 | 6378 days | 1% |
| Carrie | 8/10 | 6395 days | 1% |
| David | 10/10 | 6426 days | 1% |
| Howard | 9/10 | 6444 days | 1% |
| Chris | 8/10 | 6625 days | 1% |
| Anthony | 8/10 | 6628 days | 1% |
| Sandra Verbaarschot | 10/10 | 6628 days | 1% |
| Omer Harron | 10/10 | 6628 days | 1% |
| angela | 9/10 | 6631 days | 1% |
| Kerstin Brantryd | 5/10 | 6635 days | 1% |
| Sanne | 10/10 | 6641 days | 1% |
| Tessa McCormick | 9/10 | 6645 days | 1% |
| Sally and David Wallis | 10/10 | 6648 days | 1% |
| Martens | 8/10 | 6649 days | 1% |
| Dan Adamson | 9/10 | 6667 days | 1% |
| Ben | 7/10 | 6733 days | 1% |
| Kirsty Ranger | 9/10 | 6808 days | 1% |
| Andy Chapman | 8/10 | 6850 days | 1% |
| ranker_34 | 5/10 | 6850 days | 1% |
| Jo | 9/10 | 6850 days | 1% |
| Matous | 10/10 | 6969 days | 1% |
| Stefan&Gerte | 7/10 | 6972 days | 1% |
| Jenny | 9/10 | 6972 days | 1% |
| Paul Yacoumis | 8/10 | 6976 days | 1% |
| Deloraine | 7/10 | 6985 days | 1% |
| Denise Nick | 9/10 | 6987 days | 1% |
| Daniel | 10/10 | 6992 days | 1% |
| Martin Smith | 8/10 | 6995 days | 1% |
| Susan | 8/10 | 6998 days | 1% |
| sebastian | 10/10 | 6999 days | 1% |
| ranker_110 | 9/10 | 7006 days | 1% |
| Stefan | 8/10 | 7008 days | 1% |
| Svenja | 7/10 | 7013 days | 1% |
| Hirsh | 10/10 | 7018 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 Southern Discoveries experience has plenty of reviews and does not meet the criteria for any adjustment.
Recent Reviews Adjustment
-2.91% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 86 days. However the Southern Discoveries 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 Southern Discoveries experience has been adjusted for 200 days. Adjustments are according to the following table.
| Days | Adjustment |
|---|---|
| … | … |
| 197 | -2.87% |
| 198 | -2.88% |
| 199 | -2.90% |
| 200 | -2.91% |
| 201 | -2.93% |
| 202 | -2.94% |
| 203 | -2.96% |
| … | … |
Balancing Adjustment
4.20% 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
80%
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.