Randomization of images

[Meltem BALLAN]

BTW you can also google it as sub-list e-prime or something like that. I am
sure PST forum or this list discussed this or similar topics before.
Meltem

On Fri, Oct 14, 2011 at 9:39 AM, Meltem BALLAN <meltemballan at gmail.com>wrote:

> Gautam,
> I have an idea. You can prepare two lists (one for the right and the left
> and second for the middle images). Then, you might want to call those files
> (edit->properties->startup info). Lets say for session 1
>  call fileLR and shuffle the list (list properties->order->random).
> In order to show 20 models you can count to 20 and jump to the end of
> session (I would use goto)
> repeat it for session 2 including the middle images.
> I hope it helps.
> Meltem
>
>
> On Fri, Oct 14, 2011 at 8:56 AM, Gautam Malu <
> gautam.malu at research.iiit.ac.in> wrote:
>
>> Hi all,
>>           i am developing a simple face recognition task.  i am using
>> picture stimuli. I have images of 20 models , 3 images per model so total
>> 3*20 = 60 images.
>> 1_right_pose.jpg
>> 1_left_pose.jpg
>> 1_middle_pose.jpg
>>  ............................ total 60 images
>> Experiment consists of 2 phases
>>
>>  -->1st in learning phase, in which participants will see 2 poses of any
>> 10 models.
>> i.e total 2*10 = 20 images randomly each images for 3000ms
>> n_right_pose.jpg
>> m_left_pose.jpg
>>
>> .......total 20 images
>>
>> ---> 2nd is testing phase, In which participants will see all 20 model in
>> middle pose, randomly  for 500ms, followed by fixation of infinite duration
>> and during which they have to respond whether or not  they have seen that
>> model in learning phase.
>> n_middle_pose.jpg
>> fixation.jpg
>> ...........20 times
>>
>>
>> now the problem i am facing is how to select 10 random model's both
>> right_pose.jpg and left_pose.jpg and also display them in random order.
>> how can i get this type of ordering in learning phase
>> Example
>> 3_right_pose.jpg
>> 7_left_pose.jpg
>> 11_left_pose.jpg
>> 3_left_pose.jpg
>>
>>
>>
>> Thanks,
>>
>>
>> ----
>> Gautam Malu
>>
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>
>
>
> --
> Meltem Ballan, PhD
> Department of Psychiatry, CB# 7160
> University of North Carolina School of Medicine
> 7023 Neurosciences Hospital
> Chapel Hill, NC 27599-7160
>



-- 
Meltem Ballan, PhD
Department of Psychiatry, CB# 7160
University of North Carolina School of Medicine
7023 Neurosciences Hospital
Chapel Hill, NC 27599-7160

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