[ ] Both Margetts et al. (2011) and van de Rijt et al. (2014) performed experiments studying the process of people signing a petition.
[ ] Both Rijt et al. (2014) ແລະ Margetts et al. (2011) ທັງສອງປະຕິບັດການທົດລອງທີ່ສຶກສາຂະບວນການຂອງປະຊາຊົນເຂົ້າສູ່ລະບົບຄໍາຮ້ອງຟ້ອງໄດ້.