SRT

Here you can configure application settings:

Soon you will see balls (circles) moving slower or faster on the screen. Your task is to estimate the speed of movement of these balls by ranking them from the fastest to the slowest.

First click on the ball that is moving the fastest. After that, among the remaining balls, click on the one that is the fastest. Finally, click on the ball that you think is moving the slowest on the screen. You cancel your selection by clicking on the already selected ball (rectangle). It is safest to undo all the selected stimuli within the item and start the ranking process again. Warning: do not respond too quickly to tasks, but observe each task carefully for at least a few seconds before you start ranking. After you have ranked, ie selected all the balls, click on the button for the next task at the bottom of the screen.

Application settings:

Start level (Minimum number of circles):

Final level (Maximum number of circles):

Number of items (tasks) within each level:

Total number of items: 7

Accelerator - The speed of movement of all the balls on the screen:Select low values for the low speed of all objects on the screen. Select high values for high screen speed.

Note: match your colors with the default colors used by this application (border color, selection color, demo mode,..).

Background color during task:

Ball (circle) color during task:

Demo mode:No

Footer options:

Display the button for the previous task (item):Yes. It is possible to return to the previous task.

Display the button for the next task (item):Yes. It is not necessary to rank or select all stimuli before moving on to the next task.

Footer - The progress bar shows how many items are left until the end:Yes

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Latest research

Calculating dependent variables within a task (research):

Points. For each correctly selected rank within the same item, the user gets a number of points equal to that rank. Eg. for a correctly ranked fastest stimulus, 1 point is added within the item. For a correctly ranked 3rd fastest stimulus (option), 3 points are added within an item, etc.. The sum of the points on an individual item is equal to the sum of the exact ranks within that item. The sum of points in the whole task (research) is equal to the sum of points on all items.

Errors. The error on each individual option (stimulus) within the same item is calculated as the absolute value of the difference between the rank chosen by the user and the exact rank. The total error on each item is equal to the sum of the errors on all options within the same item. The total error in the whole task (research) is equal to the sum of the errors on all items.

The maximum number of points (and maximum error) in each item is calculated by the formula: N*(N+1)/2. N = number of options (stimuli) within the item.

Frequency. A number that indicates how many times the stimulus (option) changed position within each item (stimulus "speed"). Stimuli are counted from the top-left corner of the screen in rows (the first stimulus is in the first line up-left, and the last stimulus is in the last line down-right). The Frequency column is a control field. Spearman's rank correlation coefficient between "Rank-correct" and "Frequency" should be -1. If this is not the case the research should be repeated. A possible cause is the selection of a stimulus without sufficient stimulus display time or the web browser failing to execute the program code.

Rank. The ranks are separated from each other by a "-" sign. If a stimulus (option) within an item is not selected (ranked) the rank is 0. Rank = ordinal number of stimuli selected within the same item. Stimuli begin to count from the upper-left corner of the screen by lines (first line, second line, ..). The last stimulus is down-right. Eg: for 3 stimuli: Rank=2-3-1 means that the second stimulus is selected first, then the third, and finally the first stimulus.