PSYCH 201 Chapter Notes - Chapter 3: External Validity, False Alarm, Theoretical Definition
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Measured: variables are measured in the everyday sense of the word ( height, iq, blood pressure, weight) Manipulated: controlling the levels of a variable by assigning participants to different levels of the variable: conceptual vs. operational definition. Conceptual definition: abstract concepts such as depression. Operational definition: operationalizing the variable; or how they will measure depression; what is high depression or low: three claims: Claim: argument that someone is trying to make. Interrogating frequency claims (cid:862)over 2 million u. tee(cid:374)s dep(cid:396)essed(cid:863) (cid:862)half of americans st(cid:396)uggle to stay happy(cid:863) (cid:862)charter school outscores othe(cid:396) s(cid:272)hools(cid:863) Construct validity: how well the variables were measured. Construct validity: how both variables were measured. External validity: how well the results will generalizes to the population. Type (cid:1005) e(cid:396)(cid:396)o(cid:396): (cid:862)false ala(cid:396)(cid:373)(cid:863): (cid:272)o(cid:374)(cid:272)ludi(cid:374)g that the(cid:396)e is a (cid:272)o(cid:396)(cid:396)elatio(cid:374) (cid:449)he(cid:374) the(cid:396)e is (cid:374)ot. Type (cid:1006) e(cid:396)(cid:396)o(cid:396): (cid:862)misses(cid:863) tudy (cid:373)ight (cid:272)o(cid:374)(cid:272)lude the(cid:396)e is (cid:374)o asso(cid:272)iatio(cid:374) (cid:449)he(cid:374) the(cid:396)e is one.
