"Change-blindness" occurs when a change is masked by slow on-off flicker. Have a go at seeing how fast you can detect the changing element in the flashing array. Your results will be graphed at the end, based on the size of the feature change (shown in picture). The greater the temporal frequency (speed) change between the frames the faster you should detect it.
This demo involves detecting a change in the speed of a rippling noise pattern. An array of five randomly positioned patches slowly flash on and off. On every second presentation, one of the patches changes speed (or temporal frequency;TF). As soon as you locate the change click on it with your mouse. There are 15 trials, each includes one patch changing temporal frequency. Your data will be displayed in a graph to you at the end of the session. Oct. stands for octaves, 1 being slowest 6 being fastest. When you save your data there might be a pop-up (just ignore it) your results will be displayed here.