Social scientists have found it helpful to split validity into four main types: statistical conclusion validity, internal validity, construct validity, and external validity (Shadish, Cook, and Campbell 2001, Ch 2).
Ososayensi bezenhlalakahle bathole ukuthi kuyasiza ukuhlukanisa ukufaneleka ezinhlobonhlobo ezine eziyinhloko: isiphetho sesibalo sokuqinisekisa, ukuqinisekiswa kwangaphakathi, ukwakha ukufaneleka, nokusebenza kwangaphandle (Shadish, Cook, and Campbell 2001, chap.