--- title: "Kernel Unity Task Parameters" slug: "kernel-unity-task-parameters" updated: 2025-10-03T20:34:20Z published: 2025-10-03T20:34:20Z canonical: "docs.kernel.com/kernel-unity-task-parameters" --- > ## Documentation Index > Fetch the complete documentation index at: https://docs.kernel.com/llms.txt > Use this file to discover all available pages before exploring further. # Kernel Unity Task Parameters ### N-back - Start Rest: Duration of the baseline rest period (seconds). - Match Percent: Percentage of stimuli (cards) that qualify as a “match.” - Trials Per Block: Number of stimuli presented per block. - Stim Duration: Length of time each stimulus is displayed (seconds). - Cue Time: Duration of the cue shown before each block to remind the user of the block type (seconds). - Block Rest: Duration of the rest period between blocks (seconds). - Blocks: - Dropdown menu: allows operator to select whether to include all three N-back block types or only a subset. - Block Repeats: Number of times each block type is presented. **![](https://cdn.document360.io/c97072d7-dbc3-41f6-b55e-b62dbde0527b/Images/Documentation/image-1759186255919.png)** --- ### Finger Tapping - Start Rest: Duration of the baseline rest period (seconds). - Block Rest: Mean duration of the rest period between blocks (seconds). - ITI Mean: The mean inter-trial interval (average time between trials within a block, in seconds). - ITI Standard Deviation: Adds jitter to the ITI. ITI durations are sampled from a normal distribution with the mean set by ITI mean and the standard deviation specified here (seconds). - Stimuli Type (dropdown): - Visual – Displays a hand and indicates which finger to tap during each block. - Audio – Plays white noise in the ear of the hand that should be tapping (no visuals). - Both – Combines visual and audio stimuli. - Randomize Blocks: If enabled, randomizes the order of left- and right-hand tapping within each pair of blocks. - Blocks Per Side: Number of finger-tapping blocks performed per hand. - Trials Per Block: For visual stimuli, the number of trials (finger-tap prompts) per block. - Trial Duration: Duration of each trial (seconds). - Max Rest Jitter: Amount of jitter added to the Block Rest duration (seconds). The mean is set by Block Rest. Rest durations will fall in the range of Block Rest +/- Max Rest Jitter. ![](https://cdn.document360.io/c97072d7-dbc3-41f6-b55e-b62dbde0527b/Images/Documentation/Screenshot%202025-10-03%20at%2010.34.13%E2%80%AFAM.png) --- ### Verbal Fluency (VFT) Participant completes verbal fluency tasks consisting of control and non-control blocks, where prompts are phonological (words beginning with a letter) or semantic (items in a category) - Pre Control: Duration of the initial “pre-control” block, during which participants recite the days of the week (seconds). - Start Rest: Duration of the baseline rest period (seconds). - Block Rest: Duration of the rest period between blocks (seconds); only applies if Between Rest is enabled. - Post Control: Duration of the “post-control” block, if enabled (seconds). - Between Rest: If enabled, inserts a rest period between blocks. - Final Control: If enabled, adds a “post-control” block at the end. - Blocks (dropdown): Number of non-control blocks of phonological/semantic prompts. Each block contains 3 prompts. - Version Number (dropdown): Determines which prompts are presented in the non-control blocks. Each prompt is shown for 20 seconds, making each block 60 seconds total. The available options depend on whether 2 or 3 blocks were selected in the Blocks dropdown. ![](https://cdn.document360.io/c97072d7-dbc3-41f6-b55e-b62dbde0527b/Images/Documentation/Screenshot%202025-10-03%20at%2011.33.59%E2%80%AFAM.png) --- ### Resting State - Baseline Rest duration: Duration of the baseline rest period (seconds). - Video Duration: Length of the Inscapes video playback. The video will automatically fade to black at the specified time. ![](https://cdn.document360.io/c97072d7-dbc3-41f6-b55e-b62dbde0527b/Images/Documentation/Screenshot%202025-10-03%20at%2011.38.57%E2%80%AFAM.png) --- ### Breath-Holding - Rest duration: Duration of both the baseline rest period and the rest periods between blocks (seconds). - Breath Cycle Duration: Duration of each full breath cycle (seconds). For example, a 6-second cycle guides the participant to inhale for 3 seconds and exhale for 3 seconds. - Breath Hold Duration: Duration of the breath-holding segment following several breath cycles (seconds). - Breath Cycles Per Block: Number of breath cycles in each block before the breath-hold segment. - Blocks Per Session: Total number of blocks in the session. ![](https://cdn.document360.io/c97072d7-dbc3-41f6-b55e-b62dbde0527b/Images/Documentation/image-1759517144020.png) --- ### Auditory - Session Number: Determines which set of audio clips will play. There are 6 unique versions, determined by number 1-6. - Clip Duration: Duration each clip will play (seconds). Clips will be cut off at the specified duration. - Average Rest: Mean duration of the rest period between blocks (seconds). - Rest Standard Deviation: Determines the jitter added to the Rest duration (seconds). Rest durations are sampled from a normal distribution with the mean set by Average Rest and the standard deviation specified here. ![](https://cdn.document360.io/c97072d7-dbc3-41f6-b55e-b62dbde0527b/Images/Documentation/Screenshot%202025-10-03%20at%2011.57.10%E2%80%AFAM.png) --- ### Retinotopy A checkerboard wedge moves around a circular outline while flashing continuously. This task is used to map visual field representations in the occipital cortex. - Start Rest: Duration of the baseline rest period (seconds). - Stop Rest: Duration of the final rest period at the end of the task (seconds). - Blocks: Number of stimulus blocks (periods in which the wedge is at a different location). - Rotation Angle: Degrees the wedge moves with each step (degrees). - Rotation Period: Duration of one full rotation of the wedge (seconds). - Rotation Direction (dropdown): Choose clockwise or counterclockwise. - Columns: Number of checkered columns displayed in the wedge. - Degrees: Angular width of the checkerboard wedge (degrees). - Flash Hz: Rate at which the moving checkerboard flashes (Hz). - Starting Inner Radius: Radius of the circle in which the wedges appear (units depend on screen size, defaults to 1). ![](https://cdn.document360.io/c97072d7-dbc3-41f6-b55e-b62dbde0527b/Images/Documentation/Screenshot%202025-10-03%20at%2012.10.39%E2%80%AFPM.png) --- ### Generic - Start Rest: Duration of the baseline rest period (seconds). - Configuration: JSON-formatted instructions that define what the task displays. By default, this is populated with a finger-tapping task that mimics the standard Finger Tapping settings, displaying “Left” and “Right” on the screen. The JSON must be correctly formatted according to the instructions on the settings page; otherwise, you will not be able to Accept the settings. ![](https://cdn.document360.io/c97072d7-dbc3-41f6-b55e-b62dbde0527b/Images/Documentation/image-1759518827600.png)