Hi!
I need to recode some developmental data from a scale called Griffiths Mental Development Scales for over 400 children. Each subscale includes in 90+ items, and the database is at the item level. In these scales, children have a unimportant pattern of missings (.), successes (0) and achievements (1), and then achieve a baseline level (the highest 6 consecutive successes). After that you apply the scale until the child reaches the ceiling level (the lowest 6 consecutive failures after the ceiling), followed again by a unimportant pattern of missings (.), successes (0) and achievements (1). The total score is equal to the highest item of the baseline level, plus the number of successes after that until reaching the ceiling (6 failures). Alternatively one could think that the total could be computed by calculating the total sum of successes per child per subscale if all items below the baseline level were recoded to 1, and all items above the ceiling level were recoded to 0.
It's kind of simple, but I am just having trouble programming it. Do you have suggestions?
I am using Stata 13.1 in Windows 10.
Thanks, Clara Barata
ps- I couldn't install dataex (stata says cannot write in directory c:\ado\plus\d; r(603) so I couldn't send a proper example.
I need to recode some developmental data from a scale called Griffiths Mental Development Scales for over 400 children. Each subscale includes in 90+ items, and the database is at the item level. In these scales, children have a unimportant pattern of missings (.), successes (0) and achievements (1), and then achieve a baseline level (the highest 6 consecutive successes). After that you apply the scale until the child reaches the ceiling level (the lowest 6 consecutive failures after the ceiling), followed again by a unimportant pattern of missings (.), successes (0) and achievements (1). The total score is equal to the highest item of the baseline level, plus the number of successes after that until reaching the ceiling (6 failures). Alternatively one could think that the total could be computed by calculating the total sum of successes per child per subscale if all items below the baseline level were recoded to 1, and all items above the ceiling level were recoded to 0.
It's kind of simple, but I am just having trouble programming it. Do you have suggestions?
I am using Stata 13.1 in Windows 10.
Thanks, Clara Barata
ps- I couldn't install dataex (stata says cannot write in directory c:\ado\plus\d; r(603) so I couldn't send a proper example.