How to set up the errors order matrix
To make the practice rows:
1-16 : same for all CB, present all 16 stims
17-18 use CounterBal.xls to make locations
19, 50, 81, 11, 143, 174, 250 – vary based on CB
Use special headings/constants as outlined in Matlab Code for phase 99
Contone, dimone, decone, conttwo, dimtwo, dectwo
Presents same context box twice, each with the dimension boxes
20-49: write context # x30
dim1# x15
dim2# x15
dec1# x15
dec2# x15
221-227: practice each set of contexts, no labels, indefinite
List each 99 row again
228-283: practice trials identical to test, see test set up
284: redo practice?
285: starts test
Test setup
InitialErr.xls has all the trial types listed
Copying those 24 3x = 1 block/run
Copying that 1 run of 72 x8 = entire experiment
Leave 3 spaces at the end of each run for 3 catch trials
Catch trials
Under other 24 in initial err
Copy them 6 times, then randomly sort
Insert into last 3 spaces of each run
Randomly sort within each run
Stims: the list of all 16 stims is at the end of InitialErr
Copy it and paste down to the end of the 8 runs
Shuffle randomly
Remove rand column, i.e. pair stims with trials
Match items
Number 1-600 on left end of columns
Sort columns by “DEC” then “SHAPE” then “RESP”
If decision = 1, this means shape
If resp = 1, this means match
Depending on CB, text could be in one of the four (LT, LB, RT, RB) locations. Find out which, then in the corresponding column type:
IF(RESP=1, cell under SHAPE, 2)
You’re saying if the trial is a match, make the shape location stimulus the same as the trial shape stim
Drag this down the column until Dec changes
When resp changes to 2, change the “2” in the if statement to a 1
Repeat this for orient, texture, size and respective columns
Then type 1,2/3,4/5,6/7,8 into 4 columns an even number of times for all the DEC trials
Put rand() next to each column and sort
Insert the columns into the 3 remaining location columns for all the DEC1 trials
You won’t need to do ¼ because that’s your match location
Repeat this for all 4 decision types, resorting each time
Sort all the columns based on the far left numbers
Insert switch columns to measure the amounts of switching
Image label meanings: Texture, Orientation, Shape, Size
e.g. 1111, Texture = 1, Orientation = 1, etc
Texture: 1 = pebbled, 2 = metal
Orientation: 1 = up, 2 = down
Shape: 1 = lighthouse, 2 = top
Size: 1 = large, 2 = small
For corners,
1 = pebbled
2 = metal
3 = up
4 = down
5 = top
6 = lighthouse
7 = large
8 = small
It can’t be 1 and 2 because the four corners change based on counterbalance number. If it were just 1 and 2, then the fprintf code would read “if 1 print ‘pebbled’” and “if 1 print ‘up’” which obviously doesn’t work