Psychology Software Tools (PST): Developers of E-Prime® – the world leading stimulus presentation software with millisecond precision timing. E-Prime provides a truly easy-to-use environment for computerized experiment design, data collection, and analysis. Use E-Prime together with Chronos® for millisecond-accurate responses, sub-millisecond sound output latency, and easy communication with external devices. PST also manufactures hardware products used in fMRI research, such as the Celeritas® Fiber Optic Response System, Hyperion® MRI Digital Projection System, and an MRI Simulator with a head motion tracking system. PST’s products are in more than 5,000 labs in over 60 countries.