This folder contains data from Experiment 2 of Cooper, Wutke & Davellar (2012)
"Differential contributions of set-shifting and monitoring to dual-task
interference", Quarterly Journal of Experimental Psychology, 65 (3), 587-612.

The data are arranged as follows:

auxiliary_data.tab is a tab-delimited data file that contains the following
columns:
 * partnr: The unique participant identifier
 * group: Always 3 for this experiment
 * sex: coded as 1 for male and 2 for female
 * dob: Year of birth - used to calculate age in 2008 when the study was done
 * educ: Level of education (from 1 = high school to 5 = PhD)
 * DS_n: Number of trials on the digit switching task
 * DS_sw: Number of switch errors
 * DS_miss: Number of trials with no response
 * 2B_n: Number of trials on the 2-back task
 * 2B_hit: Number of hits on the 2-back task
 * 2B_cr: Number of correct rejections on the 2-back task
 * 2B_fp: Number of false positives on the 2-hack task
 * 2B_miss: Number of misses on the 2-back task
 * GN_n: Number of trials on the go/no-go task
 * GN_hit: Number of hits on the go/no-go task
 * GN_cr: Number of correct rejections on the go/no-go task
 * GN_fp: Number of false positives on the go/no-go task
 * GN_miss: Number of misses on the go/no-go task
Data from each participant is on a separate line.

Data from the WCST task is contained in set of files with names of the form
wcst_XXXX_Y.txt where XXXX is the participant number (ranging from 1001 to
1048) and Y encodes the condition (0 = control; 1 = with digit switching; 2 =
with 2-back; 3 = with go/no-go). Each of these files consists of 64 lines
with successive lines encoding details of successive card sort responses.
Each line should by of the form:
                    [C1, C2, C3]    S   L   F
where
    C1: Number of figures on current card (1, 2, 3 or 3)
    C2: Colour of current card (1 = red; 2 = green; 3 = yellow; 4 = blue)
    C3: Shape or form on current card (1 = triangle; 2 = star; 3 = cross; 4 = circle)
    S: Encodes the current target criterion, but the encoding depends on the
       secondary task.
       For the control condition: 1,4 = colour; 2,5 = form; 3,6 = number
       For the switching task:    1,4 = form; 2,5 = number; 3,6 = colour
       For the 2-back task:       1,4 = number; 2,5 = colour; 3,6 = form
       For the stop signal:       1,4 = colour; 2,5 = form; 3,6 = number
    L: location (1 to 4: the pile selected for this card)
    F: Feedback (1 = card sorted correctly; 0 = card sorted incorrectly)

Note that the target piles (location 1, 2, 3 and 4) are as follows:
    Location 1: 1 red triangle == [1 1 1]
    Location 2: 2 green stars == [2 2 2]
    Location 3: 3 yellow crosses == [3 3 3]
    Location 4: 4 blue circles = [4 4 4]
            
Richard P. Cooper
Mon Sep 14 14:23:37 2015