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OpenGL-based Software Package dedicated to Visual Psychophysics running on Mac OS X Psykinematix is a new OpenGL-based Software Package dedicated to Visual Psychophysics running on Mac OSX. It consists in a unique stand-alone application that does not require any programming skill to create and run complex experiments.Easy to use, powerful, subject-friendly, and reliable, Psykinematix can run standard psychophysical protocols, collect subject's responses, present complex stimuli, and analyze results on the fly.Psykinematix is also a great learning tool to introduce visual perception and to illustrate psychophysical concepts to students. Here are some key features of "Psykinematix": Easy experimental design: · no programming required. · use of a hierarchical structure. · design wizard. Standard methods: · constant stimuli. · staircase. · bayesian. Standard procedures: · nAFC. · yes/no. · discrimination. · adjustment. A large variety of visual stimuli: · shapes. · carrier (grating, noise, etc) modulated by envelope. · checkerboard-like (cartesian or polar). · custom (expression-based). Composing: · static (1st, 2nd-order). · dynamic (fusion, flickering). · timeline (OSA, ISI). · conditional, association. Support for multimedia stimuli: · text. · image. · movie. · sound. Display calibration: · geometry. · Gamma correction (manual or automatic). · radiometrics and colorimetrics. · Precise control of time-varying properties. · Data plotting and fitting with psychometric functions. · Subjects, groups and sessions management. · Communication with external devices (USB, serial, network). · Easy export of stimuli (clipboard, image and movie files). · Built-in documentation, demos and examples, tutorials. Requirements: · PowerPC G4, G5 or Intel Core processor >1.5 GHz. · 1 GB of RAM, 5 GB of free hard-disk space on system partition. · ATI Radeon, NVIDIA GeForce, or Intel GMA video chip with 64MB. · QuickTime 7.3 Limitations: · 15 days trial period. What's New in This Release: New Features: · Full compatibility with Mac OS X 10.6 ("Snow Leopard"), · Direct access to support, forum and feedback web pages from Help section, · Support for anaglyph stereo modes (Red-Green, Red-Blue, Red-Cyan glasses), · Support for dynamic micro-elements in Multi-Element Field (MEF), · Support for time-varying contrast and color space in dynamic elements in Multi-Element Field (MEF), · OpenGL preview and export to movie for Static & Timeline Composing, · Addition of system-defined variable to keep track of the trial index (useful when creating brain mapping stimuli), · Addition of system-defined variable to keep track of the target location in nFC procedure, · Addition of , , and system-defined constants, · Addition of round() function, · Addition of degtopix() and pixtodeg() functions (useful for stimuli control at pixel level), · Addition of deg() and rad() conversion functions between polar units, · Addition of cmin() and cmax() clamping functions, · Addition of rnd pseudo-constant to generate random real numbers in range, · Support for onset trigger information output to serial devices (see stimulus control settings palette), Feature Improvements: · Support for Staircase method with absolute step size, · Addition of optional maximum value constraint to Staircase parameter (clamping or abortion), · Number of reversals for estimation can now be specified in adaptive Adjustment procedure, · Addition of "Maximum Trials" termination criterion for Adjustment procedure, · Support for expression evaluation in trigger information output (see stimulus control settings palette), · Better detection and report of evaluation error (see tip tool with error in expression table for Custom stimuli), · Improved computation of time-varying stimuli that also change in size, · Better reports of frame timing information (# of missed frames reported as a warning on an event-basis), · Support for calibrating any available configuration (not only to the default one selected in the Display Preferences), · Removal of the display configuration in Calibration panel when deleting the last remaining calibration, · Estimation of required video memory when computing stimuli with an error message emitted if not enough memory available, · Improved handling of serial devices with a warning emitted when devices not enabled from I/O Preferences or experiment I/O Settings, User interface improvements: · Addition of an optional linear vs log10 scale for x,y axes in result plots, · Data not plotted anymore outside the axes-defined rectangle in Plotter panel, · Axes range automatically selected based on available data points in Plotter panel, · Only display configurations valid for the currently attached monitors available in the Calibration panel, · Color of selected resolution and calibration in experiment display settings indicates up-to-date, expired or absence of calibrations, Fixed: · Activation problem after setup under non-admin account, · Crash in calibration panel occurring when trying to calibrate a display configuration with a missing display, · Crash or unexpected behavior occurring when using or as a parameters value, · Crash occurring when an unknown trigger device is specified in stimulus control settings palette (would occur when exporting an experiment to third-party), · stimulus control settings palette gets reset when changing the trigger device, · Memory leak with aborted sessions, · unlocked events undeletable until relaunch, · Read/write status of event properties not in sync with the lock icon across all the property panels, · Locking event from properties panel did not remain after closing the panel (permanent unlocking still done from the designer panel), · Experiment properties not all inspectable when locked, · Missing Help menu under Mac OS 10.4, · Slightly inaccurate Nyquist frequency, · Loss of fractional part in degree to pixel conversion, · Edge effects in some Grating and Checkerboard stimuli, · Too large wedge size unreliable in Checkerboard stimuli, · Tiny visual artefact at fixation produced during pre-stimulus random duration when measuring RT in procedure, · Non-sticking onset of selected event in Timeline (gets replaced from previously edited Timeline), · Synchronization problem between frame duration and some properties when editing events (Timeline onsets and TF precision in Dynamic Composing), · Displayed geometry information for a display configuration not always in sync with the latest calibration, · Undeletable calibration when clicking the '-' button in the calibration panel, · Issue when using the and single expressions, · Loss in lower bits precision when using the irand function, Documentation: · Addition of a Timing section, · Addition of Contrast Sensitivity Experiment Tutorials, · Addition of Retinotopic Mapping Stimulus Tutorial, · Addition of Field of Drifting Gabor Stimulus Tutorial, · Updated "Demos, Examples & Tutorials" in Storage area of the Designer Panel with a Techniques section.

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