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Asked: 2026-06-17T11:27:10+00:00

I have a data frame that looks like this: > head(Data1A) Prime Target CorrectAnswer

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I have a data frame that looks like this:

> head(Data1A)
        Prime Target CorrectAnswer Accuracy   RT   Block TrialType
1     bezaaid barkme    PseudoWord        1 3450 Block 1        NA
2       hazen lemmet          Word        1 1108 Block 1        NA
3  bergtoppen slavin          Word        1 1160 Block 1        NA
4       wekte gareel          Word        1 1250 Block 1        NA
5      zessen studio          Word        1  557 Block 1        NA
6 nauwkeurige hotens    PseudoWord        1  882 Block 1        NA

As you can see, the column TrialType has to be filled, and I need a conditional statement to do it. I know what I want and I wrote in down in pseudocode as best as I could, but I am light years away of being able to implement this in the right syntax. Any help is much appreciated.

The Pseudocode:

For each cell in Data1A$TrialType if the corresponding cell in Data1A$Block is equal to Block 2 or Block 3 and the corresponding row in Data1A$CorrectAnswer is equal to Word OR if the corresponding cell in Data1A$Block is equal to “Block 4” or “Block 5” and the corresponding cell in Data1A$CorrectAnswer is equal to PseudoWord then the corresponding cell in TrialType will be equal to Regular else if the corresponding cell in Data1A$Block is equal to Block 1 or Block 6 OR if the corresponding cell in Data1A$Block is equal to Block 2 or Block3 and the corresponding row in Data1A$CorrectAnswer is equal to pseudoWord OR if the corresponding cell in Data1A$Block is equal to Block 4 or Block 5 and the corresponding cell in Data1A$CorrectAnswer is equal to Word then the corresponding cell in Data1A$TrialType is equal to Random

I hope this is understandable. I will be checking in case there are doubts regarding my intentions with the pseudocode.

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1 Answer

  1. Editorial Team

    I really get a headeach to simplify your logic here.

    But This should work.

    I generate some data

    dat <- read.table(text =        "Prime Target CorrectAnswer Accuracy   RT   Block TrialType
                  1     bezaaid barkme    PseudoWord        1 3450 'Block 4'        NA
                  2       hazen lemmet          Word        1 1108 'Block 5'        NA
                  3  bergtoppen slavin          Word        1 1160 'Block 4'        NA
                  1     bezaaid barkme    PseudoWord        1 3450 'Block 5'        NA
                  2       hazen lemmet          Word        1 1108 'Block 2'        NA
                  3  bergtoppen slavin          Word        1 1160 'Block 3'        NA
                  1     bezaaid barkme    PseudoWord        1 3450 'Block 2'        NA
                  2       hazen lemmet          Word        1 1108 'Block 3'        NA
                  3  bergtoppen slavin          Word        1 1160 'Block 1'        NA
                  4       wekte gareel          Word        1 1250 'Block 6'        NA
                  5      zessen studio          Word        1  557 'Block 1'        NA
                  6 nauwkeurige hotens    PseudoWord        1  882 'Block 3'        NA",header = T,row.names = NULL)

    Then I implement your logic:

    transform(dat,
          TrialType= ifelse(Block %in% c('Block 4','Block 5'),
                            ifelse(CorrectAnswer =="Word" ,"Random","Regular"),
                            ifelse(Block  %in% c('Block 2','Block 3'),
                                   ifelse(CorrectAnswer =="Word" ,"Regular","Random"),
                                   'Random')))

    Here the result

      row.names       Prime Target CorrectAnswer Accuracy   RT   Block TrialType
1          1     bezaaid barkme    PseudoWord        1 3450 Block 4   Regular
2          2       hazen lemmet          Word        1 1108 Block 5    Random
3          3  bergtoppen slavin          Word        1 1160 Block 4    Random
4          1     bezaaid barkme    PseudoWord        1 3450 Block 5   Regular
5          2       hazen lemmet          Word        1 1108 Block 2   Regular
6          3  bergtoppen slavin          Word        1 1160 Block 3   Regular
7          1     bezaaid barkme    PseudoWord        1 3450 Block 2    Random
8          2       hazen lemmet          Word        1 1108 Block 3   Regular
9          3  bergtoppen slavin          Word        1 1160 Block 1    Random
10         4       wekte gareel          Word        1 1250 Block 6    Random
11         5      zessen studio          Word        1  557 Block 1    Random
12         6 nauwkeurige hotens    PseudoWord        1  882 Block 3    Random
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