___________________________________________________________________________________________________________________ Cyberball: 3 PLAYERS ___________________________________________________________________________________________________________________ Script Author: Sean Draine, PhD last updated: 05-25-2023 by K. Borchert (katjab@millisecond.com) for Millisecond Software, LLC Script Copyright © 05-25-2023 Millisecond Software ___________________________________________________________________________________________________________________ BACKGROUND INFO ___________________________________________________________________________________________________________________ This script implements the Cyberball paradigm based on: Williams, K. D., Cheung, C. K. T., & Choi, W. (2000). CyberOstracism: Effects of being ignored over the Internet. Journal of Personality and Social Psychology, 79, 748-762. Williams, K. D., & Jarvis, B. (2006). Cyberball: A program for use in research on ostracism and interpersonal acceptance. Behavior Research Methods, Instruments, and Computers, 38, 174-180. see also: http://www1.psych.purdue.edu/~willia55/Announce/cyberball.htm ___________________________________________________________________________________________________________________ TASK DESCRIPTION ___________________________________________________________________________________________________________________ Participant plays ball with 2 other participants (= the computer). It can be predefined with what probability the computer includes/excludes the participant into the ball game. ___________________________________________________________________________________________________________________ DURATION ___________________________________________________________________________________________________________________ the default set-up of the script takes appr. 4 minutes to complete ___________________________________________________________________________________________________________________ DATA FILE INFORMATION ___________________________________________________________________________________________________________________ The default data stored in the data files are: (1) Raw data file: '3playercyberball_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 (Note: not all trials that are run might record data) Trialcode Explanation: Examples: "1to2" => in this trial player 2 (participant) throws the ball AFTER getting it from player 1 "1to3" => in this trial player 3 throws the ball AFTER getting it from player 1 (random selection decides whether player 3 throws to player 1) player: stores the current player (1, 2, 3) recipient: stores the recipient of the current ball toss (1, 2, 3) response: the (participant's) response latency: the response latency in ms count_ignore2: counts how often player 2 (participant) was "ignored" before a throw (resets every time player 2 gets to throw the ball) (2) Summary data file: '3playercyberball_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) ///Parameter Settings: showpictures: true = pictures of players are onscreen (default) false = no pictures are presented showlabels: true = labels of players are onscreen (default) false = no labels are presented item.player1.1- item.player3label.1: images and labels used for the various players ///Data: max_trialcount: maximum number of trials (= passes between all players) played ignore2_streak1: the number of times player 2 (participant) was ignored before player2 (participant) gets to respond for the first time max_ignore2: the longest streak of ignoring player 2 (participant) in the game that participant experienced before being able to respond count_player1throws: counts the number of times that player 1 gets to throw the ball count_player3throws: counts the number of times that player 3 gets to throw the ball count_player2throws: counts the number of times that participant gets to throw the ball meanRT_player2: mean latency (in ms) of participant throw count_12: counts the number of times that player 1 throws to player 2 (participant) percent_12: percentage of player 1 throws that play to player 2 (participant) count_21: counts the number of times that player 2 (participant) throws to player 1 percent_21: percentage of player 2 throws (participant) that play to player 1 meanRT_21: mean latency (in ms) of player 2 (participant) decisions to throw to player 1 count_32: counts the number of times that player 3 throws to player 2 (participant) percent_32: percentage of player 3 throws that play to player 2 (participant) count_23: counts the number of times that player 2 (participant) throws to player 3 percent_23: percentage of player 2 throws (participant) that play to player 3 meanRT_23: mean latency (in ms) of player 2 (participant) decisions to throw to player 3 percent_sameplayer: percentage of player 2 (participant) throws when player 2 throws the ball back to the player who threw the ball to participant Note: random selection -> 1/2 times of all player 2 throws percent_otherplayer: percentage of player 2 (participant) throws when player 2 throws ball to the player who didn't threw the ball to participant Note: random selection -> 1/2 times of all player 2 throws meanRT_sameplayer: mean latency (in ms) of trials in which player2 (participant) throws ball back to the player who threw the ball to participant meanRT_otherplayer: mean latency (in ms) of trials in which player2 (participant) throws ball to the player who didn't threw the ball to participant ___________________________________________________________________________________________________________________ EXPERIMENTAL SET-UP ___________________________________________________________________________________________________________________ * Participant plays ball with 2 other players for 50 trials. The number of trials can be edited under section EDITABLE PARAMETERS. * By default, all players are represented by names and pictures. Names and pictures can be edited under section EDITABLE STIMULI. To remove names or pictures go to EDITABLE PARAMETERS. * By default, player 1 throws the ball to participant (= player 2) with a pre-determined probability (default: 25% of the times) as does Player 3 (default: 25% of the times). The probabilities can be edited under section EDITABLE LISTS. The player schedules can further be customized to dictate specific/fixed throw sequences for each of the "computer player". Go to section EDITABLE LISTS for further instructions. * Decision Times for Player 1 and 3 are controlled by expressions.cyberdecisiontime under EDITABLE PARAMETERS. ___________________________________________________________________________________________________________________ STIMULI ___________________________________________________________________________________________________________________ picture examples are provided by Millisecond Software. They can easily be edited under section Editable Stimuli ___________________________________________________________________________________________________________________ INSTRUCTIONS ___________________________________________________________________________________________________________________ can be edited under section Editable Instructions ___________________________________________________________________________________________________________________ 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: /max_trialcount: maximum number of trials (= passes between the players) played /showpictures: true = pictures of players are onscreen (default) false = no pictures are presented /showlabels: true = labels of players are onscreen (default) false = no labels are presented NOTE: parameters.showpictures and parameters.showlabels cannot be set to false at the same time. / cyberdecisiontime: selects with replacement (replace) one of the 4 decision times for players1 and 3