The problem is that the comparison Outcome{j} == '11_right' is an array comparison, not a scalar comparison. I.e., the string is an array of characters, so the == operation compares each element and gives an array result. What you want to use is a string comparison function such as strcmp. E.g.,
strcmp(Outcome{j},'11_right')
And there are related functions such as strcmpi that ignore upper vs lower case in the comparison, etc.
