Task: Question Answering
Input (English): Question: What characterizes the objective techniques of psychophysiological evaluation? 
 Options:  <1> They are tests with a high ecological validity. <2> Environmental factors (e.g., light, temperature) can affect the reliability of the record. <3> The anxious subjects usually have the same level of activation as the non-anxious ones. <4> Subjects with different anxiety disorders usually have similar patterns of activation at baseline. <5> Subjects with different anxiety disorders usually have similar responses to different stimuli.
Output (English): 2