The `expsy`

data frame has 30 rows and 16 columns with missing data.
it1-it10 correspond to the rating of 30 patients with a 10 items scale.
r1, r2, r3 to the rating of item 1 by 3 different clinicians of the same 30 patients.
rb1, rb2, rb3 to the binary transformation of r1, r2, r3 (1 or 2 -> 0; and 3 or 4 -> 1) .

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This data frame contains the following columns:

- it1
a numeric vector corresponding to item 1 (rated from 1:low to 4:high)

- it2
a numeric vector corresponding to item 2 (rated from 1:high to 4:low)

- it3
a numeric vector corresponding to item 3 (rated from 1:low to 4:high)

- it4
a numeric vector corresponding to item 4 (rated from 1:low to 4:high)

- it5
a numeric vector corresponding to item 5 (rated from 1:low to 4:high)

- it6
a numeric vector corresponding to item 6 (rated from 1:low to 4:high)

- it7
a numeric vector corresponding to item 7 (rated from 1:low to 4:high)

- it8
a numeric vector corresponding to item 8 (rated from 1:low to 4:high)

- it9
a numeric vector corresponding to item 9 (rated from 1:low to 4:high)

- it10
a numeric vector corresponding to item 10 (rated from 1:low to 4:high)

- r1
a numeric vector corresponding to item 1 rated by rater 1

- rb1
binary transformation of r1

- r2
a numeric vector corresponding to item 1 rated by rater 2

- rb2
binary transformation of r2

- r3
a numeric vector corresponding to item 1 rated by rater 3

- rb3
binary transformation of r3

artificial data

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