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Tasks library


Gentask (Generalized Task Editor): An interface for creating and presenting almost any type of visual, auditory, or combined task and recording behavioral responses. Here are just a few of the features GENTASK provides that make designing complex tasks simple: calibration to ensure precise timing of stimulus presentation and EP/ERP acquisition system triggering; all common graphics file types supported; 16 bit sound support (Neuroscan SND and WAV file types); present pictures and sounds in the same task, even simultaneously; display pictures for as little as two screen refreshes; flip between pictures with virtually no delay; plus many more too numerous to name. Gentask has been used for a variety of experiments including auditory N400, MMN, CNV, picture memory, and many more. A new Gentask Editor makes creating, modifying and debugging sequences files much easier. Many sequence files created in STIM will play correctly in Stim2. In some cases, you may need to make minor modifications to allow for some programming changes.


Task Library - Fourteen tasks are pre-programmed into the Stim2 software to provide a task library to build upon. Each task allows the user to modify parameters, such as, the duration, order of presentation, the interstimulus interval, performance feedback options, and many more. The programs are categorized into Motor, Perceptual, Attention, Memory, and Cognitive tasks. Some of the more common tasks include Finger Tapping, Stroop, Card Sorting, and Categories tasks from neuropsychology. Additional tasks include Pattern reversal, Naming, Visual tracking, Spatial memory, VIsual and Auditory continuous performance, Verbal learning, and Visual memory tasks.


Motor Tasks

Tap: A motor performance task modeled after the finger tapping test commonly employed in neuropsychological assessment.

Track: A visual tracking task useful in measuring visual-motor tracking ability. Precise triggering is provided for neurophysiological recording systems such as SCAN.


Perceptual Tasks

Contrast: A unique interface for performing contrast reversal stimulation with evoked potential recording systems such as SCAN. CONTRAST features a simultaneous fixation task to ensure foveation, repositioning of pattern relative to fixation, vertical/horizontal bars, radial patterns and gradients, selective masking, and task suspension during inattentive periods.

Naming: A flexible interface for presenting visual stimuli and recording verbal responses. NAME allows you to configure tasks with almost any visual stimuli (including text and pictures), digitally record verbal responses, and score responses for both accuracy and latency. Precise triggering is also provided for neurophysiological recording systems such as SCAN.

Stroop: A version of the Stroop neuropsychological test modified for evoked potential recordings.


Attentional Tasks

Cued: A visual cued attention switching task. CUED provides central “arrow” and peripheral “highlighted box” cues and is commonly used as an index of ability to release and reorient visual attention. Triggering is provided for external devices such as SCAN ER/ERP system.

CONCPT: A “go/no-go” visual continuous performance task in which the subject’s response to the target should be contingent upon the appearance of a cue stimulus. CONCPT also provides triggering for evoked potential recording systems.

VISCPT: A visual continuous performance task widely used in the assessment of sustained attention. VISCPT provides precise triggering for evoked potential recording systems such as SCAN and is an appropriate interface for visual P300 and related experiments.

AUDCPT: an auditory continuous performance task. AUDCPT provides an interface similar to VISCPT, wherein you assign probabilities to up to 10 different auditory events. Provides precise triggering for evoked potential recordings and is perfect for P300 and MMN experiments.


Memory Tasks

Spatial Memory: A battery designed to assess static and sequential visual spatial memory.

VLT (Verbal Learning Task): A flexible interface for presenting a variety of verbal learning, verbal memory, and other language paradigms. VLT provides precise triggering for ERP systems and is well suited to N400 and other language-related ERPs.

SPR (Serial Probe Recognition): A visual memory task that can be used in a variety of experiments in which serial position effects are of interest. SPR can be used with provided “normed” pictures or your own. SPR provides precise triggering for ERP systems and is well suited to Sternberg memory scanning experiments.


Cognitive Tasks

Card Sorting: Similar to the card sorting test used in neuropsychological batteries, CARDSORT is widely used in behavioral and imaging research studies on concept formation.

Categories: CATEGORY is similar to the widely used neuropsychological test, and is useful as an activation task in imaging studies or as a behavioral measure of problem solving ability.


Utilities

Sound Editor: A program for recording, editing, and presenting digital sound segments. The Sound Editor has programmable attenuation in .75 dB steps, a dynamic range from 0 to 130 dB, 16 bit CD quality digital sampling, customizable digital filtering, mono or stereo processing, and a variety of windowing options. Sounds can be synthesized (i.e. pure tone, noise, click) or digitally sampled from a microphone or line input. Precise triggering is also provided for external devices such as SCAN EP/ERP system. The module is commonly used to present click stimuli for ABR or BAER recording, and to create sound files used in other Stim2 modules.

Image Converter: Stim2 will present the commonly encountered types of graphics files (BMP, JPG, PNG, TIF, etc.). However, should you have files that cannot be displayed, the Image Converter may be used to convert them to a form that can be presented.


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