Reads all individual choice data files, created by
function, from a directory and concatenates
those files into a single data file. Files containing either "num" or "char"
will be read, with num indicating numeric data and char indicating character
data. For more information, see output of
A character string containing the directory to read from.
Character vector containing either num or char.
A data frame containg the full design and all the responses of the combined data files that were found. Different files are indicated by an ID variable.
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