In LCBC-UiO/Questionnaires: Package with functions to calculate components and sums for LCBC questionnaires

Coding

"Form value" is the value the answer option has in the data file. "Score value" is the value used in the algorithm when zygocity is calculated.

| Variable | Answer option | Form value | Score value | | -------- | -------------------- | ---: | ---: | | Drop | Like two drops of water | 1 | 1 | | | Like most siblings | 2 | -1 | | | Don't know | 3 | 0 | | Stranger | Often | 1 | 1 | | | Occasionally | 2 | 0 | | | Never | 3 | -1 | | | Don't know | 4 | 0 | | Belief | Monozygotic | 1 | 1 | | | Dizygotic | 2 | -1 | | | Don't know | 3 | 0 | | Eye, Voice & Dexter | Exactly the same | 1 | 1 | | | Almost like | 2 | 0 | | | Different | 3 | -1 | | | Don't know | 4 | 0 |

No answer option is used directly in the calculations, only the score values. In the following, it is these values (-1, 0 or 1) that are used in the algorithms. E.g. has Drop in the formula value 1 for a positive answer to whether the twins were equal to two drops of water.

LCBC-UiO/Questionnaires documentation built on July 18, 2023, 6:45 p.m.