Task: Text Categorization
Input (English): Question: Intrasubject experimental research designs: 
 Options:  <0> They use independent variables not manipulated directly by the researcher but through the selection of the participants. <1> They are based on the verification of independent groups assigned to the experimental conditions. <2> They combine two independent variables based on the characteristics of the participants. <3> They have lower internal validity than the intersubject designs when they do not use random assignment. <4> They use specific control techniques to control the effects associated with the order of application of the experimental conditions.
Output (English): psychology