function trial = runTestTrial(disp_struct, task_struct, trial, ioObject, LTP1address)

    % blank screen
    WaitSecs(0.5);
    Screen(disp_struct.wPtr, 'Flip');

    % show the stims, and get the choice
    TRAINTEST=0;
    trial = runChoice(disp_struct, task_struct, trial, TRAINTEST, ioObject, LTP1address);
    
    % show too slow feedback
    if trial(task_struct.cRespAct) == disp_struct.RESP_SLOW
        runFeedback(disp_struct, task_struct, trial, ioObject, LTP1address);
    end
    
end % function