Choose function

Hi there,

if you look at the lesson to the choose function (https://www.psytoolkit.org/lessons/choose.html) and have a look at the table you will see that the first three numbers are always in increasing order. The check of correctness would not work if the variables CHOSEN_1 etc. would not save the bitmap numbers in increasing bitmap number order. I guess one way would be to show the bitmaps to choose from in "increasing order" in the correct order as you define it between the other available bitmaps and then check if this is correct by adding the correct bitmap numbers to your table that is read for the task and comparing those to the chose bitmap number like it is done in the lesson.

I am not sure if this will work, but you might want to try to use readmouse repeatedly for the amount of times you want your participants to choose an image. It is not as elegant as the choose function but you can save a variable after each readmouse for the bitmap number chosen to get the order in which participants chose. For example

readmouse l 2 60000 range 3 12 # the range of bitmap numbers you want participants to choose from
set $bitnumber bitmap-under-mouse MOUSE_X MOUSE_Y range 3 12 # which bitmap number was chosen by participants
set $firstchoice $bitnumber # make a variable for each choice

After the selection is completed you could then check if the responses were correct to a similar way as in the lesson by comparing to numbers in your table.
You might need some if loops here. At the end you then could save the variable in the order of chosen bitmaps $firstchoice etc. including the variable of correct or incorrect response.

The choose option nicely shows which bitmap was chosen, which you would not have with readmouse. A way to get around this is to show a frame around an image you would have to create yourself first and then find the place of the chosen image to show the frame. For example

if $bitnumber == 12
show bitmap blueframe -300 200 # you would have to repeat this for all your images, which might be quite long.
fi

Another option is to just show a dot or someting you created on the chosen image instead after an image was selected:

show bitmap yellowdot MOUSE_X MOUSE_Y #

A major downside of the described alternative is that participants cannot undo the selection, which is possible with the choose function.