Is it possible to modify the probability of a variable to be run in an experiment ?

Paul_Kaduk

Hi, im creating a subitizing experiment,

I have 8 variables named 'target1_color' , 'taget2_color' ....

I have specified in a loop the different color the target should have (white or gray)

However I want the variable white to appear less often then the variable gray.

The variable 'gray' should have p=0,625 to appear
the variable 'white' p=0,375 to appear

is there an inline_script code that i should use in this case ?

Paul_Kaduk

I have an idea about how to do it but as i don't know how to code i can't make it happen

my idea is to generate random numbers from 1 to 1000
give at my target variable a random number

for exemple 'target1_color' = 2

attribute to numbers a color : (1,375) = white
(376, 1000) = gray

i don't know if this can work

from random import
print randtint (1, 1000)

(1,375) = white
(376, 1000) = gray

search_canvas = items['target_position'].canvas
search_canvas['target1']
.

Paul_Kaduk

from ramdom import

search_canvas = items[var.target_dispaly]

[var.color_x] = randtin (1,1001)

if [var.color_x] < 376 :
[var.color_x]= white

else:
var.color_x= grey

eduard

Hi Paul,

yes your idea makes perfect sense. Here some code that does the trick:

import random

num = random.randint(1,1000)
if num<276:
    var.target_color = 'white'
else:
    var.target_color = 'gray'
# and later

cv = Canvas()
cv.circle(0,0,50,color=var.target_color,fill=True)
cv.show()
# and wait

Does that make sense?

Eduard