___________________________________________________________________________________________________________________ *SELF REFERENTIAL PROCESSING* ___________________________________________________________________________________________________________________ Script Author: Katja Borchert, Ph.D. (katjab@millisecond.com) for Millisecond Software, LLC Date: 02-18-2016 last updated: 02-28-2022 by K. Borchert (katjab@millisecond.com) for Millisecond Software, LLC Script Copyright © 02-28-2022 Millisecond Software ___________________________________________________________________________________________________________________ BACKGROUND INFO ___________________________________________________________________________________________________________________ This script implements the Self-Referential Processing Task, a learning paradigm to study the impact of self-related vs. other-related information on simple perceptual matching tasks. Reference: Sui, J., He, X., & Humphreys, G.W. (2012). Perceptual Effects of Social Salience: Evidence From Self-Prioritization Effects on Perceptual Matching. Journal of Experimental Psychology: Human Perception and Performance, Vol. 38, No. 5, 1105–1117 (Experiment 1) ___________________________________________________________________________________________________________________ TASK DESCRIPTION ___________________________________________________________________________________________________________________ Participants are given 3 -shape associations (e.g. "Circle is yourself") with shapes "circle", "square", "triangle" and s "You", "Friend"*, "Stranger". In forced-choice matching trials, they then have to decide quickly whether a random pairing of shape and (e.g. Circle paired with 'Friend') is a match or not. *by default, this script collects the actual name of a friend. This setting can be changed under section Editable Parameters ___________________________________________________________________________________________________________________ DURATION ___________________________________________________________________________________________________________________ the default set-up of the script takes appr. 15 minutes to complete ___________________________________________________________________________________________________________________ DATA FILE INFORMATION ___________________________________________________________________________________________________________________ The default data stored in the data files are: (1) Raw data file: 'selfreferentialprocessing_raw*.iqdat' (a separate file for each participant) build: The specific Inquisit version used (the 'build') that was run computer.platform: the platform the script was run on (win/mac/ios/android) date, time: date and time script was run subject, group: with the current subject/groupnumber session: with the current session id blockcode, blocknum: the name and number of the current block (built-in Inquisit variable) trialcode, trialnum: the name and number of the currently recorded trial (built-in Inquisit variable) Note: trialnum is a built-in Inquisit variable; it counts all trials run; even those that do not store data to the data file such as feedback trials. Thus, trialnum may not reflect the number of main trials run per block. selfShape: stores the shape name assigned to 'self' friendShape: stores the shape name assigned to 'friend' strangerShape: stores the shape name assigned to 'stranger' friendName: the name used for the Friend matches phase: "practice", "test" matchCondition: "match" vs. "mismatch" shapeCategory: "self", "friend", "stranger", shapeImage: stores the currently presented shape image text: stores the currently presented text responseWindow: stores the duration (in ms) of the current responsewindow response: the participant's response (scancode of response button) correct: the correctness of the response (1 = correct; 0 = incorrect) latency: the response latency (in ms); measured from OFFSET of shape/s iti: intertrial interval in ms (2) Summary data file: 'selfreferentialprocessing_summary*.iqdat' (a separate file for each participant) inquisit.version: Inquisit version run computer.platform: the platform the script was run on (win/mac/ios/android) startDate: date script was run startTime: time script was started subjectid: assigned subject id number groupid: assigned group id number sessionid: assigned session id number elapsedTime: time it took to run script (in ms); measured from onset to offset of script completed: 0 = script was not completed (prematurely aborted); 1 = script was completed (all conditions run) selfShape: stores the shape name assigned to 'self' friendShape: stores the shape name assigned to 'friend' strangerShape: stores the shape name assigned to 'stranger' friendName: the name used for the Friend matches propCorrect_overall: overall proportion correct across all test trials meanRT_overall: overall mean latency (in ms) of correct responses across all test trials SD_overall: overall standard deviation (in ms) of correct response latencies across all test trials propCorrect_SelfMatch: proportion correct across all self (shape)-matched test trials meanRT_SelfMatch: mean latency (in ms) of all correct responses to all self-matched test trials propCorrect_FriendMatch: proportion correct across all friend-matched test trials meanRT_FriendMatch: mean latency (in ms) of all correct responses to all friend-matched test trials propCorrect_StrangerMatch: proportion correct across all stranger-matched test trials meanRT_StrangerMatch: mean latency (in ms) of all correct responses to all stranger-matched test trials propCorrect_SelfMisMatch: proportion correct across all self-MisMatched test trials meanRT_SelfMisMatch: mean latency (in ms) of all correct responses to all self-MisMatched test trials propCorrect_FriendMisMatch: proportion correct across all friend-MisMatched test trials meanRT_FriendMisMatch: mean latency (in ms) of all correct responses to all friend-MisMatched test trials propCorrect_StrangerMisMatch: proportion correct across all stranger-MisMatched test trials meanRT_StrangerMisMatch: mean latency (in ms) of all correct responses to all stranger-MisMatched test trials ___________________________________________________________________________________________________________________ EXPERIMENTAL SET-UP ___________________________________________________________________________________________________________________ 1 Practice Block: 12 trials (present all possible combinations) 3 Test Blocks: each block runs 120 trials in 6 conditions (order of trials is randomly determined): Self-shape Trials: self-match: 20 trials self-mismatch (=> self-friend: 10 trials, self-stranger: 10 trials) Friend-shape Trials: friend-match:20 friend-mismatch:20 Stranger-shape Trials stranger-match:20 stranger-mismatch:20 Trialsequence: fixation (500ms) -> stim presentation (100ms) -> random ResponseWindow (800-1200ms) -> Feedback (500ms) -> optional ITI At the end of each block, participants receive accuracy feedback and can take a break (unless it's the last block, then they are done) By default, the fixation cross is presented in the center; the shape is presented above the fixation cross and the below the fixation cross. Distances/sizes can be edited under Editable Parameters. Assignment of to Shape: The assignment of to shape is counterbalanced by group number. This script runs 3 different combinations - each gets associated with each shape once. ___________________________________________________________________________________________________________________ STIMULI ___________________________________________________________________________________________________________________ see section Editable Stimuli all stimuli are white presented on a gray background Note: the sizes/vertical positions of the shapes/s can be adjusted under Editable Parameters ___________________________________________________________________________________________________________________ INSTRUCTIONS ___________________________________________________________________________________________________________________ Instructions are not original to the task. They are provided by Millisecond Software as htm/html pages and can be edited by changing the provided htm/html files. To edit htm/html-files: open the respective documents in simple Text Editors such as TextEdit (Mac) or Notepad (Windows). Note: in order for the instructions to reflect alternative parameter settings, some of the conditionalized code used in the htm files can be found in the script itself. ___________________________________________________________________________________________________________________ EDITABLE CODE ___________________________________________________________________________________________________________________ check below for (relatively) easily editable parameters, stimuli, instructions etc. Keep in mind that you can use this script as a template and therefore always "mess" with the entire code to further customize your experiment. The parameters you can change are: /collectFriendName: true (1): the script provides a textbox to enter the name of an actual friend; this name is then used for the friend-shape pairings (default) false (0): the script does not collect the name of an actual friend and uses the generic "FRIEND" for the friend-shape pairings /picturesize: the size of the shape pics in canvas percentage (default: 30%) /size: the size of the s in canvas height percentages (default: 5%) /fixationsize: the size of the fixation cross in canvas height percentages (default: 5%) /fixation_y: the y-coordinate (in screen percentages) of the fixation cross (default: 50%) /shape_y: the y-coordinate (in screen percentages) of the shape (default: 35%) /_y: the y-coordinate (in screen percentages) of the (default: 65%) /responsekey_left: the left responsekey (default: A) /responsekey_right: the right responsekey (default: L) /fixationDuration: the duration (in ms) of the fixation cross at the beginning of a block (default: 500) /stimPresentation: the duration (in ms) of the shape/ presentation (default: 100ms) /iti: intertrial interval in ms (default: 0ms)