Hi Roberto,
What I suggested is a brute force method of translating response
options into ordinal numbers. Fortunately for me, the Barratt
Impulsivity Scale has relatively short and constant response options.
As I programmed the test myself, I already had the questions in plain
text, so I simply added the "as.numeric(factor(" and "levels=..."
commands to the forward and reversed response options to create the
whole transformation code. With a bit of cut-and-paste work, it didn't
take that long. Because the BIS-11 is used quite a bit where I am
working. it was worth the trouble.
Jim
On Thu, Nov 1, 2018 at 8:38 PM P. Roberto Bakker
<robertobak...@gmail.com> wrote:
>
> Hi Jim,
>
> Thank you.
> An additional question: as I have many columns to change in numeric, and the
> columns are long sentences, what is an efficient way to do this?
> I checked in StackOverflow but could not find the right answer
> Best Roberto
>
>
> Op do 1 nov. 2018 om 00:25 schreef Jim Lemon <drjimle...@gmail.com>:
>>
>> Hi Roberto,
>> Here is a snippet of code that translates the text responses of the
>> BIS-11 into numeric values. Note the reversal of the order in the
>> second item:
>>
>> BIS$Q1<-as.numeric(factor(BIS$Q1,
>> levels=c("Almost","Often","Occasionally","Rarely/Never")))
>> BIS$Q2<-as.numeric(factor(BIS$Q2,
>> levels=c("Rarely/Never","Occasionally","Often","Almost")))
>> ...
>>
>> Jim
>> On Thu, Nov 1, 2018 at 8:57 AM P. Roberto Bakker
>> <robertobak...@gmail.com> wrote:
>> >
>> > Hi Rich,
>> >
>> > Thank you for your answer.
>> > The sentences are strings (likert scale: 'the situation is highly
>> > applicable to me' etc - in Dutch), or column labels; it may be confusing as
>> > it is in Dutch. Below I show you part of the dataframe with my annotation
>> > added (string/column lable) to give you an idea.
>> > I need to change the likert strings into numeric (1:5). And this is a
>> > challenge somehow.
>> > With dplyr, plyr it did not work.
>> > After I have the numeric version then I can stack them as suggested by
>> > David.
>> >
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