[ ] Both Rijt et al. (2014) and Margetts et al. (2011) both perform experiments that study the process of people signing a petition.
[ ] ທັງ Margetts et al. (2011) ແລະ van de Rijt et al (2014) ໄດ້ປະຕິບັດວຽກທົດລອງສຶກສາຂະບວນການຂອງຜູ້ລົງນາມໃນຄໍາຮ້ອງຟ້ອງ.