Keeping image on-screen for a fixed window

[jcallaire]

Well the problem is the manual doesn’t tell you were to put the min-max info (at least where I was looking), and if it does then I apologize.

So I figured it out by looking at other programs.

(1) in the styles file I put 0-2000! in the min-max column (that’s where it goes!)

(2) then in the “time” column of my program I have:

rt:1,2,-1,clear-1

This results in showing my stimulus for a max of 2 seconds. If the participant doesn’t respond then the non-response is recorded (-1) and the next stimulus is shown. If the participant responds with in the 2 second window the next stimulus is shown (clear -1).

Now all I need are my button boxes (cough) and I can run this bad boy all day!



jason

[jarvis24]

Great! Any chance you would be willing to zip and attache a sample of your N-Back task so that others could use it as a starting point for their own?

[Rene Kopietz]

Jason,

would it be possible for you to upload the complete task? That would be very helpful!

Thanks,
Rene

[jarvis24]

See also:

For DirectRT:
http://www.empirisoft.com/support/showthread.php?t=1309

For MediaLab:
http://www.empirisoft.com/support/showthread.php?t=491

[djjohnson]

Well the problem is the manual doesn’t tell you were to put the min-max info (at least where I was looking), and if it does then I apologize.

So I figured it out by looking at other programs.

(1) in the styles file I put 0-2000! in the min-max column (that’s where it goes!)

(2) then in the “time” column of my program I have:

rt:1,2,-1,clear-1

This results in showing my stimulus for a max of 2 seconds. If the participant doesn’t respond then the non-response is recorded (-1) and the next stimulus is shown. If the participant responds with in the 2 second window the next stimulus is shown (clear -1).

Now all I need are my button boxes (cough) and I can run this bad boy all day!



jason

Using Jason's method I created a 2-back task with 250 numbered stimuli (numbers 1-9). I used the !meta command to end it after 5 minutes. Correct answers are identified by pressing the spacebar (57) when a repeated value is presented or pressing nothing when a filler stimulus is present (-1).

Attached; enjoy!