- [google sheets data](https://docs.google.com/spreadsheets/d/1NJqdI0LL1OyaABKffEhkvTv4JeVdxr5btxQk5ywRPu8/edit#gid=952159492)
- 30 pilot subjects
- 4 sets/surveys
- sets 1, 3: accuracy
- sets 2, 4: interest
- 30 headlines (same 30 headlines shown in all 4 sets, but in different order)
- 15 true, 15 (false and mixed)
# counterbalancing/random assignment
How many subjects assigned to each condition/survey?
```r
# no. of subjs per survey/set (check random assignment)
> dt0[, .N, survey_number]
survey_number N
1: 2 7
2: 3 7
3: 4 10
4: 5 6
```
# duration/time taken in minutes
| | NUnique| PercentMissing| Mean| SD| Min| Median| Max| Histogram|
|:-------------------|-------:|--------------:|-----:|----:|---:|------:|---:|---------:|
|duration_in_minutes | 17| 0| 11.53| 8.57| 2| 9.50| 39| ▅▇▆▂▁▁▁▁▁|
![[s20220322_114253.png]]
![[s20220323_141056.png]]