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Duration: the time of the run in seconds. [10, 10000].
Delay: the delay in seconds between pressing the start button and the run starting. This allows you time to get ready for the tremor measurement to begin: you need to put a finger on the pressure pad. [0,10].
Acceleration ratio: the increase(>1) or decrease(<1) of frequency of successive flashes. For instance, if the frequency is initially 10 and the acceleration ratio is 1.1, the frequency goes from 10, to 11, to 12.1, etc.. Acceleration happens very quickly, so a ratio of no more than 1.001 is advised. [0.9, 1.001].
Background color: the color of the background color in the format #rrggbb, where r, g and b are hexadecimal (base 16) numbers, with r standing for red, g for green, b for blue. For example, #000000 gives black, #ff0000 gives red, #ffffff gives white. [#000000,#ffffff].
Beat interval: the period of time in msec at which the left and right sides are asked what is their color. This value limits the frequencies that can be used: the frequency of the beat must be more than the frequency of the flashes. The other factor that needs to be taken into account is whether the browser is able to refresh the page at this rate. [10,100].
Random color difference: the maximum size of a random change to the color. This is decided for each color character pair using hexadecimal arithmetic. For instance, if the original color is #777777, the random color difference is #010101 and a trace of 3 random numbers is 0.9, 0.8, 0.1, the new color generated is #787877. How this is applied will depend on the Markovian factor, see below. [#000000,#ffffff].Width: the width of each vertical, color column as a percentage of the screen size. [0,30].
Movement: the movement of the columns per cycle, as a percentage of total screen size. [0,30].
Markovian: a measure of the correlation between successive random colors. This field takes a value from 0 to 1: 0 gives pure random; 1 gives, in effect, turns off the random changes, you are left with the original values; intermediate values give a weighted mixture of the two. [0,1].
Horizontal probability: the chance that the color blocks are drawn horizontally. [0,1].
Adaptive minimum: the number of finger movements detected by the pressure pad required to fire the adaptive response (e.g. change the orientation of the color blocks). Further adaptive responses occur each time this number of movements are detected. [0,1000000].
Adaptive color change: the magnitude of the color reduction per adaptation. Each color is controlled seperately. For example, #010000 will take 1 from just the red value. [#000000,#ffffff].
Separate left side and right side control over::
Frequency: the frequency of the color changes. [0.01,20]
Phase: the amount that the left and right sides are out of step. 180 degrees represents opposite. [0,180]
Color on fraction: the fraction of the cycle that the column is colored. For the rest of the time the background color is used. [0,1].
Primary color: the default color of the column. [#000000,#ffffff].
Secondary color: an alternative color for the column which is fired randomly. [#000000,#ffffff].
Secondary color probability: the probability that the alternative color is used. [0,1].
Screen divider: a piece of cardboard can be placed on the keyboard, between the screen and your nose. This causes each eye to see a different image.
Pressure pad: putting your finger on the pressure pad can detect the tremor. Whether this works depends on the size of the tremor, the stickyness of the pad and the lightness of the touch. To gauge whether it is working, place a finger lightly on the pad. Any tremor should cause the finger to move on the pad, making the cursor to move around the screen.