--- API: 2.1 Description: A simple word/ nonword categorization OpenSesame: 3.3.10 Platform: nt Title: Lexical-decision task --- set width 1024 set uniform_coordinates no set title "Lexical decision" set synth_backend legacy set subject_parity even set subject_nr 0 set start experiment set sound_sample_size -16 set sound_freq 48000 set sound_channels 2 set sound_buf_size 1024 set sampler_backend psycho set round_decimals 2 set mouse_backend psycho set keyboard_backend psycho set height 768 set fullscreen no set form_clicks no set foreground white set font_underline no set font_size 32 set font_italic no set font_family mono set font_bold no set experiment_path "d:\\OpenSesame\\share\\opensesame_extensions\\example_experiments\\examples\\lexical_decision" set disable_garbage_collection yes set description "A simple lexical-decision example experiment" set coordinates relative set compensation 0 set color_backend psycho set clock_backend psycho set canvas_backend psycho set bidi no set background gray define notepad about_this_example __note__ In a lexical-decision experiment, the task is to categorize letter strings on some feature, such as wether they form a word (e.g. 'apple') or not (e.g. 'ipple'). Usually, the goal of a lexical-decision experiment is to analyze the response times to words as a function of another variable, that is, not the variable that participants base their response on. __end__ set description "A simple notepad to document your experiment. This plug-in does nothing." define loop block_loop set source_file "" set source table set skip 0 set repeat 1 set order random set offset no set item trial_sequence set description "A single block of trials" set cycles 6 set continuous no set column_order "correct_response;target;category" set break_if_on_first yes set break_if never setcycle 0 correct_response "[word_response]" setcycle 0 category word setcycle 0 target apple setcycle 1 correct_response "[nonword_response]" setcycle 1 category nonword setcycle 1 target ipple setcycle 2 correct_response "[word_response]" setcycle 2 category word setcycle 2 target turtle setcycle 3 correct_response "[nonword_response]" setcycle 3 category nonword setcycle 3 target ourtel setcycle 4 correct_response "[word_response]" setcycle 4 category word setcycle 4 target magic setcycle 5 correct_response "[nonword_response]" setcycle 5 category nonword setcycle 5 target mocag run trial_sequence define sequence block_sequence set flush_keyboard yes set description "A sequence containging a single block of trials followed by feedback to the participant" run reset_feedback always run block_loop always run feedback always define inline_javascript countervalance_javascript set description "Executes JavaScript code" set _run "" ___prepare__ if (vars.subject_parity = "odd") { vars.word_response = "z" vars.nonword_response = "m" } else { vars.word_response = "m" vars.nonword_response = "z" } __end__ define sketchpad end_of_practice set duration keypress set description "Displays stimuli" draw textline center=1 color=white font_bold=no font_family=mono font_italic=no font_size=32 html=yes show_if=always text="The practice phase is finished
The real experiment will start now

Press any key to continue" x=0 y=0 z_index=0 define sequence experiment set flush_keyboard yes set description "Runs a number of items in sequence" run about_this_example always run countervalance_javascript always run instructions always run practice_loop always run end_of_practice always run experimental_loop always run goodbye always define loop experimental_loop set source_file "" set source table set skip 0 set repeat 1 set order random set offset no set item block_sequence set description "A loop containing one or more practice blocks" set cycles 1 set continuous no set column_order practice set break_if_on_first yes set break_if never setcycle 0 practice no run block_sequence define feedback feedback set reset_variables yes set duration keypress set description "Provides feedback to the participant" draw textline center=1 color=white font_bold=no font_family=sans font_italic=no font_size=32 html=yes show_if=always text="End of block [=var.count_block_sequence+1]

Your average response time was [avg_rt] ms
Your accuracy was [acc] %

Press any key to continue" x=0 y=0 z_index=0 define sketchpad fixation set start_response_interval no set duration 500 set description "Displays stimuli" draw line color=white penwidth=2 show_if=always x1=-32 x2=32 y1=-32 y2=-32 z_index=0 draw line color=white penwidth=2 show_if=always x1=-32 x2=32 y1=32 y2=32 z_index=0 define sketchpad goodbye set duration keypress set description "Displays stimuli" draw textline center=1 color=white font_bold=no font_family=mono font_italic=no font_size=32 html=yes show_if=always text="The experiment is finished
Thank you for participating

Press any key to exit" x=0 y=0 z_index=0 define sketchpad green_fix set start_response_interval no set duration 500 set description "Displays stimuli" draw line color=green penwidth=2 show_if=always x1=-32 x2=32 y1=-32 y2=-32 z_index=0 draw line color=green penwidth=2 show_if=always x1=-32 x2=32 y1=32 y2=32 z_index=0 define sketchpad instructions set duration keypress set description "Displays stimuli" draw textline center=1 color=white font_bold=no font_family=sans font_italic=no font_size=32 html=yes show_if=always text="Instructions


You will see strings of letters
Your task is to say whether these letters form a word or not

If the letters form a word, press [word_response]
If the letters do not form a word, press [nonword_response]

Examples

apple is a word, so you press [word_response]
ipple is not a word, so you press [nonword_response]


Press a key to start practice" x=0 y=0 z_index=0 define keyboard_response keyboard_response set timeout 5000 set flush yes set event_type keypress set duration keypress set description "Collects keyboard responses" set allowed_responses "z;m" define logger logger set description "Logs experimental data" set auto_log no log subject_nr log subject_parity log count_reset_feedback log count_trial_sequence log count_word log category log target log response_keyboard_response log correct_response log correct log accuracy log response_time log acc log avg_rt define loop practice_loop set source_file "" set source table set skip 0 set repeat 1 set order random set offset no set item block_sequence set description "Repeatedly runs another item" set cycles 1 set continuous no set column_order practice set break_if_on_first yes set break_if never setcycle 0 practice yes run block_sequence define sketchpad red_fix set start_response_interval no set duration 500 set description "Displays stimuli" draw line color=red penwidth=2 show_if=always x1=-32 x2=32 y1=-32 y2=-32 z_index=0 draw line color=red penwidth=2 show_if=always x1=-32 x2=32 y1=32 y2=32 z_index=0 define reset_feedback reset_feedback set description "Resets the feedback variables, such as 'avg_rt' and 'acc'" define sequence trial_sequence set flush_keyboard yes set description "A single trial" run fixation always run word always run keyboard_response always run red_fix "[correct] = 0" run green_fix "[correct] = 1" run logger always define sketchpad word set start_response_interval no set duration 0 set description "Displays stimuli" draw textline center=1 color=white font_bold=no font_family=mono font_italic=no font_size=32 html=yes show_if=always text="[target]" x=0 y=0 z_index=0 draw line color=white penwidth=2 show_if=always x1=-32 x2=32 y1=-32 y2=-32 z_index=0 draw line color=white penwidth=2 show_if=always x1=-32 x2=32 y1=32 y2=32 z_index=0