#' Checks the display change implementation in Boundary experiments (Rayner, 1975)
#'
#' Checks the implementation of 1 boundary change during sentence reading. Checks the timing of the display change,
#' as well as whether the boundary was crossed in a forwards saccade.
#'
#' @author Martin R. Vasilev
#'
#' @param data_list Input of data files to be processed. This can be specified in three ways:
#' 1) a directory that contains all the files (it will select all files ending with ".asc",
#' and order them by participant number, if present).
#' 2) Directory to a txt file that contains all the .asc data file names inside:
#' e.g., data_list= "C:/My Data/data_list.txt".
#' In the .txt file, the directory for each .asc data file should appear on a separate row,
#' e.g.: C:/My Data/subject1.asc /n
#' C:/My Data/subject2.asc
#' 3) A directory to a single .asc file: e.g., data_list= "C:/My Data/subject1.asc".
#'
#' @param maxtrial Maximum number of experimental trials in the experiment (default= 9999)
#'
#' @param boundary_loc The name of the message flag in the data file for the pixel location of the boundary (if present)
#'
#' @param start_flag start flag for the beginning of the display change
#'
#' @param end_flag end flag indicating the completion of the display change
#'
#' @include utility.R
Boundary<- function(data_list= '', maxtrial= 999, boundary_loc= 'BOUNDARY',
start_flag= 'DISPLAY CHANGE STARTED', end_flag= 'DISPLAY CHANGE COMPLETED'){
# check if user provided data dir:
if(length(data_list)==0){
data_list= file.choose() # make them chose a file
message("To process multiple files, please specify a directory in 'data_list'")
}
# check file input:
if(grepl('.txt', data_list)){
data<- readLines(data_list, warn=F) # process multiple files
}else{
if(grepl('.asc', data_list)){ # if a single .asc file was provided...
data<- data_list # process only 1 file
} else{ # otherwise, it must be a dir of files
data<- get_files(data_list)
}
}
dat<- NULL
for (i in 1:length(data)){ # for each subject..
cat(sprintf("\nProcessing subject %i", i)); cat("\n")
cat(sprintf("Loading data %s ...", data[i]));
filename= data[i] #strsplit(data[i], "\\")
file<- readLines(data[i]) # load file
cat(" Done"); cat("\n")
trial_db<- trial_info(file, maxtrial= maxtrial, selectEXP = T) # extract info about trials to be processed
cat("Trial... ")
for(j in 1:nrow(trial_db)){ # for each item
trialFile<- file[trial_db$ID[j]:trial_db$end[j]]
temp<- data.frame(sub=NA, item= NA, cond=NA, seq= NA, Bnd_loc= NA, tCross=NA, tStarted=NA, tCompleted=NA,
tChange=NA, tActualChange= NA, prevFlag= NA, nextFlag= NA, tPrevFlag= NA, tNextFlag=NA,
tChangetoFixOnset= NA)
temp$prevFlag<- NULL
temp$tPrevFlag<- NULL
temp$sub<- i
temp$item<- trial_db$item[j]
temp$cond<- trial_db$cond[j]
temp$seq<- j
# Try to find boundary location:
Bnd_txt<- trialFile[which(grepl(boundary_loc, trialFile))]
loc<- substr(Bnd_txt[1], unlist(gregexpr(' ', Bnd_txt[1]))[1]+nchar(boundary_loc)+1, nchar(Bnd_txt[1]))
loc<- as.numeric(loc)
temp$Bnd_loc<- loc
# Find the start flag:
Start_text<- trialFile[which(grepl(start_flag, trialFile))]
start_time<- substr(Start_text, 1, unlist(gregexpr(' ', Start_text))[1])
start_time<- get_num(start_time)
temp$tStarted<- start_time
# Find the end flag:
End_text<- trialFile[which(grepl(end_flag, trialFile))]
end_time<- substr(End_text, 1, unlist(gregexpr(' ', End_text))[1])
end_time<- get_num(end_time)
temp$tCompleted<- end_time
# difference between started and completed:
temp$tChange<- temp$tCompleted - temp$tStarted
# what is the actual time the boudary was crossed?
whichRow<- which(grepl(start_flag, trialFile))
samples<- trialFile[(whichRow-51): whichRow-1]
# remove flags from samples data:
samples<- samples[!grepl("EFIX", samples)]
samples<- samples[!grepl("SFIX", samples)]
samples<- samples[!grepl("ESACC", samples)]
samples<- samples[!grepl("SSACC", samples)]
samples<- samples[!grepl("MSG", samples)]
samples <- as.data.frame(do.call( rbind, strsplit( samples, '\t' ) )) # V2 is xpos
samples$V2= as.numeric(as.character(samples$V2)) # x pos vector
samples$V1= as.numeric(as.character(samples$V1))
time_cross<- which(samples$V2>= temp$Bnd_loc)
if(length(time_cross)>0){
temp$tCross<- samples$V1[time_cross[1]]
}else{
temp$tCross<- temp$tStarted
}
# calculate actual change duration:
temp$tActualChange<- temp$tCompleted - temp$tCross
AfterBnd= trialFile[whichRow:length(trialFile)]
# Get next flag:
nextSFIX<- which(grepl(c('SFIX') , AfterBnd))
nextEFIX<- which(grepl(c('EFIX') , AfterBnd))
if(nextSFIX[1]< nextEFIX[1]){
temp$nextFlag<- 'SFIX'
tNextFlag= AfterBnd[nextSFIX[1]]
#tNextFlag= get_num(unlist(strsplit(tNextFlag, '\t'))[1])
temp$tNextFlag<- get_num(tNextFlag)
}else{
temp$nextFlag<- 'EFIX'
tNextFlag= AfterBnd[nextEFIX[1]]
tNextFlag= get_num(unlist(strsplit(tNextFlag, '\t'))[1])
temp$tNextFlag<- tNextFlag
}
# timing of change relative to next fixation onset?
if(temp$nextFlag== "SFIX"){
temp$tChangetoFixOnset<- temp$tCompleted - temp$tNextFlag
}else{ # EFIX flag
tNextSFIX= AfterBnd[nextSFIX[2]]
tNextSFIX<- get_num(tNextSFIX)
temp$tChangetoFixOnset<- tNextSFIX-temp$tCompleted
}
dat<- rbind(dat, temp)
cat(toString(j)); cat(" ")
} # end of j
} # end of i
return(dat)
}
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