Psefologiya (qadimgi yunoncha: ψῆφος, yunonlar ovoz berishda ishlatgan „tosh“) — statistik tahlil usullaridan foydalangan holda saylovlar haqidagi fan. Buning uchun exit poll natijalari, oʻtgan yillardagi statistik maʼlumotlar, saylov kampaniyalarining moliyaviy xarajatlari va boshqalar turli xil maʼlumotlardan foydalaniladi.
Bu atama 1952-yilda Ronald McCallum tomonidan kiritilgan[1].
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