[solved] Unique Randomization

mcadoor2

Hi,

I need to present a series of facial stimuli where both what face is shown and whether that face is shown once or three times (in a row). So; random face 'x', shown three times. Next, random face 'y', shown once.
It would be easy enough to randomize if face 'x' gets shown three times for each participant, but I'd like not only the face itself, but the number of times it's shown for every participant.

So far I am able to successfully randomize the presentation of the visual stimuli. My problem is (a) getting Open Sesame to decide to either show it once or three times and (b) getting it to show the visual stimulus again after say like a 500ms delay while still operating within the same loop sequence.

Any suggestions on how to accomplish this would be amazing!

Edwin

Hi,

Here is a working script example. The script (including some example pictures from Wikipedia) can be downloaded here.

# Generated by OpenSesame 2.8.3 (Gutsy Gibson)
# Wed Oct 01 21:35:32 2014 (nt)
# <http://www.cogsci.nl/opensesame>

set mouse_backend "legacy"
set subject_parity "even"
set height "768"
set font_italic "no"
set canvas_backend "legacy"
set synth_backend "legacy"
set start "experiment"
set title "New experiment"
set coordinates "relative"
set width "1024"
set sampler_backend "legacy"
set transparent_variables "no"
set foreground "white"
set font_bold "no"
set description "Default description"
set background "black"
set font_size "18"
set keyboard_backend "legacy"
set font_family "mono"
set compensation "0"
set bidi "no"
set subject_nr "0"

define sketchpad blank
    set duration "1000"
    set description "Displays stimuli"

define sequence experiment
    run reset_counting_variable "always"
    run welcome "always"
    run face_loop "always"

define loop face_loop
    set repeat "1"
    set description "Repeatedly runs another item"
    set item "face_sequence"
    set break_if "never"
    set column_order "imgname"
    set cycles "3"
    set order "random"
    setcycle 0 imgname "bunny.png"
    setcycle 1 imgname "carrot.png"
    setcycle 2 imgname "potato.png"
    run face_sequence

define sequence face_sequence
    set flush_keyboard "yes"
    set description "Runs a number of items in sequence"
    run repeat_loop "always"

define sketchpad image
    set duration "2000"
    set description "Displays stimuli"
    draw image 0 0 "[imgname]" scale=1 center=1 show_if="always"

define loop repeat_loop
    set repeat "0.5"
    set description "Repeatedly runs another item"
    set item "showing_sequence"
    set break_if "never"
    set column_order "showtime"
    set cycles "2"
    set order "random"
    setcycle 0 showtime "1"
    setcycle 1 showtime "3"
    run repeat_sequence

define sequence repeat_sequence
    set flush_keyboard "yes"
    set description "Runs a number of items in sequence"
    run show_loop "always"
    run reset_counting_variable "always"

define inline_script reset_counting_variable
    ___run__
    exp.set("count_image", 0)
    __end__
    set _prepare ""
    set description "Executes Python code"

define loop show_loop
    set repeat "3"
    set description "Repeatedly runs another item"
    set item "show_sequence"
    set break_if "[count_image] = [showtime]"
    set column_order ""
    set cycles "1"
    set order "random"
    run show_sequence

define sequence show_sequence
    set flush_keyboard "yes"
    set description "Runs a number of items in sequence"
    run image "always"
    run blank "always"

define sketchpad welcome
    set duration "keypress"
    set start_response_interval "no"
    set description "Displays stimuli"
    draw textline 0 0 "OpenSesame 2.8.0 <i>Gutsy Gibson</i>" center=1 color=white font_family="serif" font_size=32 font_italic=no font_bold=no show_if="always" html="yes"

mcadoor2

Thanks, Edwin.

This helped!