Hi, 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 Taieri Gorge Railway.
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.
Taieri Gorge Railway
Valid Reviews
68 Valid Reviews
The Taieri Gorge Railway experience has a total of 68 valid reviews. There are no 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 | 18 |
|
26% |
| 9/10 | 19 |
|
28% |
| 8/10 | 17 |
|
25% |
| 7/10 | 6 |
|
9% |
| 6/10 | 4 |
|
6% |
| 5/10 | 2 |
|
3% |
| 4/10 | 1 |
|
1% |
| 3/10 | 1 |
|
1% |
| 2/10 | 0 |
|
0% |
| 1/10 | 0 |
|
0% |
83.82% Average
The raw data average (mean) for all the Taieri Gorge Railway valid reviews is 83.82% 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
62 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 62 face-to-face reviews collected during interviews by our team.
Below is the distribution of ratings for the 62 face-to-face reviews:
| Rating | Count | Percentage | |
|---|---|---|---|
| 10/10 | 14 |
|
23% |
| 9/10 | 17 |
|
27% |
| 8/10 | 17 |
|
27% |
| 7/10 | 6 |
|
10% |
| 6/10 | 4 |
|
6% |
| 5/10 | 2 |
|
3% |
| 4/10 | 1 |
|
2% |
| 3/10 | 1 |
|
2% |
| 2/10 | 0 |
|
0% |
| 1/10 | 0 |
|
0% |
82.58% Average
The raw data average (mean) for all the Taieri Gorge Railway face-to-face reviews is 82.58% and is based on 62 face-to-face reviews. This value is not used to calculate the ranking score and it only provided here for comparison purposes.
Weighted Average
85.58%
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 |
|---|---|---|---|
| Vicki Hoskinson | 10/10 | 2239 days | 100% |
| Wil Goes | 7/10 | 3360 days | 41% |
| Eric Lambley | 7/10 | 3777 days | 21% |
| Trish Saunders | 9/10 | 4118 days | 6% |
| Kath Tonkin | 9/10 | 4118 days | 6% |
| Fabian Lee | 6/10 | 4124 days | 4% |
| Elly Zimmer | 7/10 | 4132 days | 5% |
| Kerri | 9/10 | 4247 days | 0% |
| Sylvia Klatt | 3/10 | 4400 days | 7% |
| Pete Wilson | 9/10 | 4417 days | 19% |
| Willem de Jong | 9/10 | 4452 days | 19% |
| Mike Edwards | 10/10 | 4506 days | 19% |
| Signe Kaspersen | 8/10 | 4790 days | 18% |
| Les Barnes | 9/10 | 4805 days | 19% |
| Karl Brachtl | 10/10 | 4805 days | 19% |
| Beeny | 8/10 | 4806 days | 18% |
| Michael & Janet | 9/10 | 4806 days | 19% |
| Nico Schoots | 7/10 | 4807 days | 17% |
| Hazel & Alan Damerell | 10/10 | 4807 days | 19% |
| Nico Welagen | 9/10 | 4811 days | 19% |
| Horst Langstein | 9/10 | 4818 days | 19% |
| Des & Ann Bidwell | 10/10 | 4820 days | 19% |
| Colin Jenkins | 8/10 | 4836 days | 18% |
| Stanton | 9/10 | 4856 days | 19% |
| John & Lorraine | 8/10 | 5141 days | 18% |
| Juergen Wolf | 9/10 | 5152 days | 19% |
| Malcolm McLean | 8/10 | 5152 days | 18% |
| Erin | 6/10 | 5153 days | 15% |
| Laurie Smith | 8/10 | 5153 days | 18% |
| David Mellard | 10/10 | 5154 days | 19% |
| Zuur | 8/10 | 5159 days | 18% |
| Paul Smith | 8/10 | 5168 days | 18% |
| Robert Haidt | 10/10 | 5183 days | 19% |
| Robin Schomburg | 10/10 | 5187 days | 19% |
| Lizzie | 10/10 | 5252 days | 19% |
| Rosey834 | 10/10 | 5252 days | 19% |
| Margie | 10/10 | 5505 days | 19% |
| Kerry Wood | 10/10 | 5529 days | 19% |
| Giaque | 5/10 | 5533 days | 13% |
| Chris & Dawn Humphries | 9/10 | 5534 days | 19% |
| Maria Newton | 8/10 | 5537 days | 18% |
| J Kempeneers | 8/10 | 5541 days | 18% |
| Beverly B | 8/10 | 5569 days | 18% |
| ianc | 10/10 | 5609 days | 19% |
| koellner | 4/10 | 5615 days | 10% |
| Deede K | 9/10 | 5625 days | 19% |
| Kathrin Thomas | 8/10 | 5629 days | 18% |
| Ruth Kinder | 10/10 | 5647 days | 19% |
| harryb | 8/10 | 5726 days | 18% |
| regw | 10/10 | 5737 days | 19% |
| gerrys | 8/10 | 5816 days | 18% |
| streneer | 10/10 | 5848 days | 19% |
| SSheil | 10/10 | 5849 days | 19% |
| Mike | 7/10 | 5865 days | 17% |
| Roy | 9/10 | 5865 days | 19% |
| A | 10/10 | 5892 days | 19% |
| SimonR | 9/10 | 5895 days | 19% |
| VacherD | 8/10 | 5896 days | 18% |
| Paul | 7/10 | 5904 days | 17% |
| john west | 8/10 | 5929 days | 18% |
| jonathan | 9/10 | 5982 days | 19% |
| martina | 8/10 | 6058 days | 18% |
| Esther | 6/10 | 6067 days | 15% |
| Helen | 9/10 | 6211 days | 19% |
| Liz | 9/10 | 6244 days | 19% |
| Sue | 6/10 | 6579 days | 15% |
| Cat | 5/10 | 6591 days | 13% |
| Franz-Josef | 9/10 | 6643 days | 19% |
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 Taieri Gorge Railway experience has plenty of reviews and does not meet the criteria for any adjustment.
Recent Reviews Adjustment
-3.40% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 67 days. However the Taieri Gorge Railway 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 Taieri Gorge Railway experience has been adjusted for 200 days. Adjustments are according to the following table.
| Days | Adjustment |
|---|---|
| … | … |
| 197 | -3.35% |
| 198 | -3.37% |
| 199 | -3.38% |
| 200 | -3.40% |
| 201 | -3.42% |
| 202 | -3.43% |
| 203 | -3.45% |
| … | … |
Balancing Adjustment
2.44% 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
85%
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.