Assigning values to bitmaps

Hi there,

as a starting point, numbers are assigned to images in accordance of the order you write them under bitmaps, e.g.

bitmaps
car
cat
couch

The image car would have number 1, cat number 2 and couch number 3. This can be used, for example, when you want to show images on the screen and not write the image name but instead just the number.

Another assignment of numbers occurs during a task, when you show images on a screen. For example, you show first the couch, then the cat and then the car on the screen and they all can be seen. Using readmouse for clicking on an image, a choice is available in the range of 1 to 3, with 1 referring to the first image (couch), 2 referring to the second image (cat), and 3 to the third image (car).

You could use an "if"-statement for recording the assigned values. Depending on what image was clicked on you could then save the value in accordance with the choice, e.g.

readmouse l 1 5000
set $number_of_bitmap bitmap-under-mouse MOUSE_X MOUSE_Y
if $number_of_bitmap == 1
set $score 500
fi

and so on ...

For an example of reading the image number, see also here: www.psytoolkit.org/lessons/select_bitmap.html

As you can see, I used a local variable for the score in the task. Depending on what you want (showing the score of the trial or showing the overall score) you might want to use a global variable instead. If you want to show the total score at another stage, you can add the value of the local variable to your global variable by

set &totalscore + $score

for example.

I am not aware of the possibility of importing an excel formula but you could try using

set expression [insert formula]

I hope this helped you a bit.

Thank you so much Alexandra!! Because of your help, I'm now nearly done with my experiment

The timer of readmouse is the number behind the 1 in my stated example above: Time limit 5000 ms. If you want to increase this, just change this number to a higher amount of ms, e.g. 60000 for one minute. Afer a mouseclick it should go directly to the next bit of code. Delay does mean in this case that the order is to wait for the stated time until the next bit of code is read.