Recognition (study and test)

[vscript]

I'm new here and having some trouble. Hoping someone can help. The examples are basically all single-phases.

Does anyone have an example of a recognition-memory experiment? I'm trying to pull randomly from a list (e.g., say a list of 100 words) and assign some number (e.g., 50) for a study phase and then all words during the test phase. I need to know which were assigned studied and which were not as well as study order and test order. Obviously there are multiple steps here, but I'm trying to figure out the best approach. A new class? A dictionary? Any examples are helpful. 

[Florian Krause]

Hi vscript,

I guess the easiest way is indeed to use a dictionary which clearly has an ID for each word. You can then get 50 random items from that dict and log their IDs.

Here is some very quick example:

from expyriment import control, design, misc, stimuli

# SETTINGS

ITI  = 1000 # in milliseconds

words = {1: "hello",

         2: "world",

         3: "some",

         4: "more",

         5: "words",

         6: "needed"}

# DESIGN

exp = control.initialize()

exp.add_data_variable_names(["Phase", "WordID", "Studied", "Response", "RT"])

study = design.Block(name="Study phase")

for id in design.randomize.rand_int_sequence(1, len(words.keys()))[:len(words) / 2]:

    t = design.Trial()

    t.set_factor("WordID", id)

    study.add_trial(t)

exp.add_block(study)

test = design.Block(name="Test phase")

for id in design.randomize.rand_int_sequence(1, len(words.keys())):

    t = design.Trial()

    t.set_factor("WordID", id)

    test.add_trial(t)

exp.add_block(test)

# RUN

control.start()

for counter, block in enumerate(exp.blocks):

    stimuli.TextScreen(block.name, "Press [SPACE] to continue").present()

    exp.keyboard.wait(misc.constants.K_SPACE)

    for trial in block.trials:

        word_id = trial.get_factor("WordID")

        stim = stimuli.TextLine(words[word_id])

        exp.clock.wait(ITI - stim.preload())

        stim.present()

        key, rt = exp.keyboard.wait()

        stim.unload()

        exp.data.add([block.id, word_id,

                      word_id in exp.blocks[0].get_trial_factor_values("WordID"),

                      key, rt])

control.end()

I hope this helps.

Best,

Florian

On Wed, Aug 12, 2015 at 8:17 PM, vscript <cook.g...@gmail.com> wrote:

I'm new here and having some trouble. Hoping someone can help. The examples are basically all single-phases.

Does anyone have an example of a recognition-memory experiment? I'm trying to pull randomly from a list (e.g., say a list of 100 words) and assign some number (e.g., 50) for a study phase and then all words during the test phase. I need to know which were assigned studied and which were not as well as study order and test order. Obviously there are multiple steps here, but I'm trying to figure out the best approach. A new class? A dictionary? Any examples are helpful. 

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Florian Krause (Developer)
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[vscript]

Thank you for this. I think this will take me some distance. I wasn't sure if a class was better than a dictionary.