The Bivalent Shape Task Version 1.1 (Esposito et al., 2013). A simple nonverbal dimensional filtering task akin to the Stroop task.

ABOUT:
This archive enables the Bivalent Shape Task (BST) to be run
on your computer. To do so, you must first have installed
PEBL version 2.2 or later (available at http://pebl.sf.net).

Authors:
Shane T. Mueller (shanem@mtu.edu) & Alena Esposito (alenaesposito@gmail.com)

REFERENCE:
Esposito, A. G., Baker-Ward, L., & Mueller, S. T. (2013). Interference
suppression vs. response inhibition: An explanation for the absence of a
bilingual advantage in preschoolers' Stroop task performance.
Cognitive Development, 28(4), 354-363.
http://www.sciencedirect.com/science/article/pii/S0885201413000518

VERSION 1.1 UPDATES (2025):
- Migrated to Layout & Response System for unified response handling
- Added support for multiple response modes (keyboard, mouse, touch)
- Added JSON parameter file support with schema validation
- Added translations for 7 languages (EN, DE, ES, IT, LT, NL, PT)
- Improved visual layout with better spacing and positioning
- Fixed Linux/Wayland mouse position issues in touchtarget mode
- Modernized code for PEBL 2.2 compatibility
