▁are : ▁ ▁Must ▁have ▁at ▁least ▁two ▁construct s ; ▁ ▁The oret ical ▁propos itions , ▁specifying ▁link ages ▁between ▁construct s : ▁" As ▁age ▁increases , ▁memory ▁loss ▁increases ". ▁ ▁Cor respond ence ▁rules , ▁allowing ▁a ▁construct ▁to ▁be ▁measured . ▁ ▁Oper ational ization : ▁" Age " ▁is ▁measured ▁by ▁asking ▁" how ▁old ▁are ▁you ?" ▁ ▁Emp ir ical ▁construct s ▁or ▁variables ▁that ▁can ▁actually ▁be ▁measured . ▁ ▁These ▁are ▁oper ational ized ▁theoretical ▁construct s . ▁ ▁Emp ir ical ▁link ages : ▁Hyp oth eses ▁before ▁data ▁collection . ▁Emp ir ical ▁general ization ▁after ▁data ▁collection . ▁ ▁Valid ity ▁evidence ▁based ▁on ▁nom ological ▁valid ity ▁is ▁a ▁general ▁form ▁of ▁construct ▁valid ity . ▁It ▁is ▁the ▁degree ▁to ▁which ▁a ▁construct ▁behav es ▁as ▁it ▁should ▁within ▁a ▁system ▁of ▁related ▁construct s ▁( the ▁nom ological ▁network ). ▁ ▁Nom ological ▁networks ▁are ▁used ▁in ▁theory ▁development ▁and ▁use ▁a ▁modern ist ▁approach . ▁ ▁See ▁also ▁▁▁ ▁Cons ili ence ▁ ▁C oh er ent ism ▁ ▁References ▁ ▁External ▁links ▁ ▁http :// www . social res earch methods . net / kb / nom on et . htm ▁ ▁Category : Valid ity ▁( stat istics ) <0x0A> </s> ▁C ind y ▁Pat ton ▁( born ▁February ▁ 1 2 , ▁ 1 9 5 6 ) ▁is ▁an ▁American ▁soci ologist ▁and ▁historian ▁special izing ▁in ▁the ▁history ▁of ▁the