No appropriate method, property, or field 'MergedKeys' for class 'PollClass'.

Hi guys,

I have been trying to work on the Matlab script I have wrote to measure the RT for the task.

However, the Matlab program returns back to the screen with the following message after the first stimulus has presented (I have two stimuli to be presented, the first stimulus always appears before the onset of the second stimulus. Whar's more is response key for the first stimulus needs to be pressed before the onset of the second stimulus).

No appropriate method, property, or field 'MergedKeys' for class 'PollClass'.

More scripts are shown below:

myKbd = PollClass(0.005);
myKbd.Reset;  % Time0 is set here.
Times = myKbd.Times - myKbd.Time0;
NResps = myKbd.NKeys;
if NResps==1
    RT1 = myKbd.Times(1);
    Resp1 = myKbd.MergedKeys;  
else
    RT1 = ExpInfo.NogoRT;
    Resp1 = {ExpInfo.HomeKey};
end

Answer 1

[Sheng Chen]

That error message means in class 'PollClass', there is no property called 'MergedKeys'

You can use isprop to check if there is such property by using the following function

tf = isprop(myKbd,'MergedKeys')

which returns true if 'MergedKeys' is a property of 'PollClass'

Or you can use

tf = ismethod(myKbd,'MergedKeys')

to check if 'MergedKeys' is a method of 'PollClass' or not.

Please to Determine if method of object and Determine if property of object