Task: Text Categorization
Input (English): Question: In a quasi-experimental design: 
 Options:  <0> There is no specific intervention by the researcher on the independent variable or treatment. <1> Spontaneous behavior is studied in natural situations. <2> It constitutes the maximum degree of intervention and internal control. <3> Study groups can not be organized by random assignment. <4> It represents the maximum degree of naturalness and the minimum internal control.
Output (English): psychology