Return to the LuchinsWaterJugTask page
						
									Luchins' Water Jug Task
SCRIPT INFO

Script Author: Katja Borchert, Ph.D. (katjab@millisecond.com) for Millisecond Software, LLC
Date: 08-26-2015
last updated: 08-15-2016 by K.Borchert (katjab@millisecond.com) for Millisecond Software LLC

Copyright © 08-15-2016 Millisecond Software


BACKGROUND INFO

											*Purpose*
This script implements a computerized version of the Water Jug Task based on:

Luchins, A.S., & Luchins, E.H. (1950). New experimental attempts at preventing mechanization in problem solving. 
Journal of General Psychology, 42, 279-297

											  *Task*
Participants are asked to figure out how to measure out a specific amount of water using 3 water jugs 
of different sizes whose volume is known (1 practice problem + 10 test problems).


DATA FILE INFORMATION: 
The default data stored in the data files are:

(1) Raw data file: 'LuchinsWaterJugTask_raw*.iqdat' (a separate file for each participant)

build:							Inquisit build
computer.platform:				the platform the script was run on
date, time, subject, group:		date and time script was run with the current subject/groupnumber 
blockcode, blocknum:			the name and number of the current block
trialcode, trialnum: 			the name and number of the currently recorded trial
									(Note: not all trials that are run might record data; by default data is collected unless /recorddata = false is set for a particular trial/block) 
/round:							round information: 0 = practice; 1-10 = test
/jugAvolume:					stores the volume of jug A
/jugBvolume:					stores the volume of jug B
/jugCvolume:					stores the volume of jug C
/jugTotal:						stores the to be calculated amount of water
/Einstellungsmethod:			 "-1A+1B-2C" (default Eintellungsmethod for test problem 1-10)
response:						the participant's response for the current trial
									-> either mouse input or key scancode
latency: 						the response latency (in ms)
/algebraicexpression:			contains the proposed algebraic expression, e.g. "+1A-2B+3C"
/arithmeticexpression:			contains the proposed arithmetic expression, e.g. "+1*32-2*5+3*4"
/solution:						contains the solution to the arithmetic expression, e.g. "29" 
/usedEinstellungsmethod:		1 = true: participant used Einstellungsmethod; 0 = false, participants did not use Einstellungsmethod
/correct:						1 = the proposed solution is correct; 0 = the proposed solution is incorrect
/rt:							cumulative latency of a trial sequence (in ms)

(2) Summary data file: 'LuchinsWaterJugTask_summary*.iqdat' (a separate file for each participant)

script.startdate:				date script was run
script.starttime:				time script was started
script.subjectid:				subject id number
script.groupid:					group id number
script.elapsedtime:				time it took to run script (in ms)
computer.platform:				the platform the script was run on
/completed:						0 = script was not completed (prematurely aborted); 1 = script was completed (all conditions run)
/countcorrect:					counts all correct test problems
/Einstellungsmethod:			 "-1A+1B-2C" (default Eintellungsmethod for test problem 1-10)
/count_Einstellungsmethod:		counts all test problems that were solved with the Einstellungsmethod

/test1_acc-
/test10_acc:					accuracy for test problem 1-10: 1 = correct; 0 = incorrect

/test1_solution-
/test10_solution:				the proposed algebraic solution expression for test problem 1-10 

/test1_Einstellung-
/test10_Einstellung:			use of the Einstellungsmethod for test problem 1-10: 1 = yes; 2 = no



EXPERIMENTAL SET-UP
This script uses the 11 problems from Luchins & Luchins (1950). To change the problems, go to
section Editable Lists and edit the Lists (Note: parameters.Einstellungsmethod under section Editable Values might also need to be changed)

Practice Block: the practice block presents the first problem to offer participants experience with the interface.
It presents feedback and is repeated until participants get it correct.

Test Blocks: 10 test blocks; each presenting one of the 10 remaining test problems.
The test blocks do not present feedback.
Note: If a time limit is required, set the time under section Editable Values and then go to section BLOCKS
and follow further instructions.

INSTRUCTIONS
The instructions are not original and 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:

/trialtimeout:						IF a timelimit is required for each test trial, set the time here (in ms) and then go to section BLOCKS and follow further instructions
/Einstellungsmethod:				stores the Einstellungsmethod for test problem 1-10 = "-1A+1B-2C" (depends on problems used)



Copyright © Millisecond Software. All rights reserved.
Contact | Terms of Service | Security Statement | Employment