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N-back task training - 3x3 square with random sequence with responses

Windows 10: psychopy version v2020 1.3: Standard standalone

Hi Everyone, I am new to PsychoPy and need help.

I am looking to create a visual n back training task. The visual stimulus will be a 3 x 3 square. A random sequence of blocks will flash, participants are to remember the sequence according to the trial (1 back, 2 back, 3 back… 9 back). The level of n increases as participants accurately recall and decreases the worse participants get.

I am looking to create the 3x3 square block that provides random sequence and record the accurate response. Furthermore, I would like to develop an increase in n back and decrease in n-back number depending on how well participants improve to get worse.

Can anyone help me in developing this?