How looping pictures stimulus

Tanto

I am programming my cognitive-emotion recognition experiment. But I had some difficulties concerned how to looping the image using "expyriment.stimuli.Picture()". I had 5 major emotion and i want to present in 2 blocks and 5 trials. Here some my code :
n_trials_block = 5
n_blocks = 2
emo_stimuli = ["G:/Py/Imej/Anger.jpg", "G:/Py/Imej/Contempt.jpg", "G:/Py/Imej/Disgust.jpg", "G:/Py/Imej/Happy.jpg"]
exp = expyriment.design.Experiment(name="Emotion_Recognition")
expyriment.control.initialize(exp)

for block in range(n_blocks):
my_block = expyriment.design.Block(name=str(block + 1))
for trial in range(n_trials_block):
now_stimuli = emo_stimuli[trial]
emot_stim = expyriment.stimuli.Picture(emo_stimuli)
emot_trial = expyriment.design.Trial()
emot_trial.add_stimulus(emot_stim)
my_block.add_trial(emot_trial)

my_block.Shuffle_trials()
exp.add_block(my_block)

fladd

Hi Tanto,

I am not sure I understand what it exactly it is you want to achieve. Could you maybe be a bit more specific?

Best,
Florian

Tanto

My apologies, I am new in Python and all the stuff scripting language. My research is to distinguish ERA (Emotional Response Ability) with Positive Emotion and Negative Emotion. In positive emotion I have happy and joy, in negative emotion there are sad and anger. To present this image I need some ability to looping the image, otherwise I just write it down in very tidy ways :

block = 2
n_trial_block = 5
expyriment.io.defaults.outputfile_time_stamp = False
exp = expyriment.design.Experiment(name="Visual_Emotion_Recognition")
expyriment.control.initialize(exp)

block_one = expyriment.design.Block(name="1")
trial_one = expyriment.design.Trial()
stim = expyriment.stimuli.Picture("G:/Py/Imej/Anger.jpg")
stim.preload()
trial_one.add_stimulus(stim)
trial_two = expyriment.design.Trial()
stim = expyriment.stimuli.Picture("G:/Py/Imej/Sad.jpg")
trial_two.add_stimulus(stim)
trial_three = expyriment.design.Trial()
stim = expyriment.stimuli.Picture("G:/Py/Imej/Sad.jpg")
trial_three.add_stimulus(stim)
trial_four = expyriment.design.Trial()
stim = expyriment.stimuli.Picture("G:/Py/Imej/Anger.jpg")
trial_four.add_stimulus(stim)
trial_five = expyriment.design.Trial()
stim = expyriment.stimuli.Picture("G:/Py/Imej/Sad.jpg")
trial_five.add_stimulus(stim)
block_one.add_trial(trial_one)
block_one.add_trial(trial_two)
block_one.add_trial(trial_three)
block_one.add_trial(trial_four)
block_one.add_trial(trial_five)
block_one.shuffle_trials()
exp.add_block(block_one)

block_two = expyriment.design.Block(name="2")
trial_one = expyriment.design.Trial()
stim = expyriment.stimuli.Picture("G:/Py/Imej/Fear.jpg")
stim.preload()
trial_one.add_stimulus(stim)
trial_two = expyriment.design.Trial()
stim = expyriment.stimuli.Picture("G:/Py/Imej/Sad.jpg")
trial_two.add_stimulus(stim)
trial_three = expyriment.design.Trial()
stim = expyriment.stimuli.Picture("G:/Py/Imej/Sad.jpg")
trial_three.add_stimulus(stim)
trial_four = expyriment.design.Trial()
stim = expyriment.stimuli.Picture("G:/Py/Imej/Fear.jpg")
trial_four.add_stimulus(stim)
trial_five = expyriment.design.Trial()
stim = expyriment.stimuli.Picture("G:/Py/Imej/Fear.jpg")
trial_five.add_stimulus(stim)
block_two.add_trial(trial_one)
block_two.add_trial(trial_two)
block_two.add_trial(trial_three)
block_two.add_trial(trial_four)
block_two.add_trial(trial_five)
block_two.shuffle_trials()
exp.add_block(block_two)

block_three = expyriment.design.Block(name="3")
trial_one = expyriment.design.Trial()
stim = expyriment.stimuli.Picture("G:/Py/Imej/Happy.jpg")
stim.preload()
trial_one.add_stimulus(stim)
trial_two = expyriment.design.Trial()
stim = expyriment.stimuli.Picture("G:/Py/Imej/Joy.jpg")
trial_two.add_stimulus(stim)
trial_three = expyriment.design.Trial()
stim = expyriment.stimuli.Picture("G:/Py/Imej/Happy.jpg")
trial_three.add_stimulus(stim)
trial_four = expyriment.design.Trial()
stim = expyriment.stimuli.Picture("G:/Py/Imej/Happy.jpg")
trial_four.add_stimulus(stim)
trial_five = expyriment.design.Trial()
stim = expyriment.stimuli.Picture("G:/Py/Imej/Joy.jpg")
trial_five.add_stimulus(stim)
block_three.add_trial(trial_one)
block_three.add_trial(trial_two)
block_three.add_trial(trial_three)
block_three.add_trial(trial_four)
block_three.add_trial(trial_five)
block_three.shuffle_trials()
exp.add_block(block_three)

and so on..I just want to looping this three blocks. Its easier if the stimuli like textline to be presented that i can use list but if i do, there is some error that said "list cannot decode". After all..thanksssss for your support!!!

fladd

Assuming your question is how to get two different block types (one negative, one positive emotion), where each has 5 trials that are randomly(?) drawn from two possible pictures, something along the lines of this should work:

import expyriment as xpy


pictures = {"anger": xpy.stimuli.Picture("G:/Py/Imej/Anger.jpg"),
            "sad": xpy.stimuli.Picture("G:/Py/Imej/Sad.jpg"),
            "happy": xpy.stimuli.Picture("G:/Py/Imej/Happy.jpg"),
            "joy": xpy.stimuli.Picture("G:/Py/Imej/Joy.jpg")}
for picture in pictures:
    pictures[picture].preload()

exp = xpy.design.Experiment("Emotion Regulation")

for emotion_type, emotions in {"negative": ["anger", "sad"], "positive": ["happy", "joy"]}.items():   # use iteritems() in Python 2
    block = xpy.design.Block()
    block.set_factor("EmotionType", emotion_type)
    for trial_repetition in range(5):
        trial = xpy.design.Trial()
        emotion = xpy.design.randomize.rand_elem(emotions)
        trial.set_factor("Emotion", emotion)
        trial.add_stimulus(pictures[emotion])
    exp.add_block(block)

Tanto

Hi Florian
Thank you very much! the basic is combine with tuple with every stimuli. I'll work for the rest (correct response in certain emotion).