This repository contains code and files for the relational match-to-sample tasks used in
Kmiecik, Perez, & Krawczyk (2021). Navigating Increasing Levels of Relational Complexity: Perceptual, Analogical, and System Mappings. Journal of Cognitive Neuroscience. 33(3), 357-376. https://doi.org/10.1162/jocn_a_01618
This task was developed in the Krawczyk Reasoning Lab at The University of Texas at Dallas. Please direct any questions to Matt Kmiecik via email ([email protected]) or feel free to submit an issue.
See the above referenced publication for methodological details.
We hope that those interested in relational reasoning and complexity find our materials useful and helpful in their own work.
The fractal-like images used in experiment 1 and 2 were generated based on an algorithm described in Miyashita et al. (1991) that I used to loosely code a MATLAB script. This script is titled Miyashita1991.m. When run, this script will ask how many images you would like to create. After typing in a number it will generate them in the present working directory.
Note. Because this script utilizes random numbers to generate fractal-like shapes, it will generate a new set each time. If this is not desired, simply use the rng function to set the seed: https://www.mathworks.com/help/matlab/ref/rng.html
Experiments 1 and 2 are contained in their separate folders. They are identical except for a single line of instructions in Experiment 2 and contain the e-Prime 2.0 Studio and Run files, as well as the original and resized images.
Note. These experiments were programmed and administered using a 17 inch Dell LCD monitor (1280 x 1024); therefore, the e-prime experiments contain image placements that are hardcoded for this resolution. It will be necessary to adapt the locations of the stimuli so that they are appropriate for your screen's size and resolution. In other words, running the experiments on your machine without changing the location of the stimuli will likely result in displaced stimulus locations.
Counterbalancing and stimulus presentation order are documented using the fractalExperiment.xlsx Excel spreadsheet.