PSY 308 Lecture Notes - Lecture 8: Hot-Hand Fallacy, Prospect Theory, Mutual Exclusivity

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Probability basics: (cid:862)(cid:894)a lot of(cid:895) de(cid:272)isio(cid:374) (cid:373)aki(cid:374)g is a(cid:271)out (cid:396)edu(cid:272)i(cid:374)g u(cid:374)(cid:272)e(cid:396)tai(cid:374)t(cid:455), (cid:373)i(cid:374)i(cid:373)izi(cid:374)g (cid:396)isk, a(cid:374)d (cid:373)a(cid:454)i(cid:373)izi(cid:374)g (cid:271)e(cid:374)efit(cid:863, we have already discussed that inductively drawn conclusions have a degree of uncertainty about them. (cid:862)false positi(cid:448)e(cid:863) -i(cid:374)(cid:272)o(cid:396)(cid:396)e(cid:272)tl(cid:455) (cid:272)o(cid:374)(cid:272)ludi(cid:374)g so(cid:373)e (cid:272)o(cid:374)ditio(cid:374) is p(cid:396)ese(cid:374)t (cid:449)he(cid:374) it is(cid:374)"t. (cid:862)false (cid:374)egati(cid:448)e(cid:863) -incorrectly concluding some condition is not present when it is. E(cid:454)a(cid:373)ples i(cid:374) (cid:862)(cid:396)eal life(cid:863): courtroom decisions, medical diagnoses, business decisions, everyday decisions (purchases, choices, probabilities are often implied in everyday conversation: (cid:862)i thi(cid:374)k the (cid:1008)(cid:1004)(cid:1005) is a (cid:271)ette(cid:396) fit tha(cid:374) fi(cid:374)(cid:272)h to get the(cid:396)e (cid:395)ui(cid:272)kl(cid:455)(cid:863) (cid:862)i thi(cid:374)k it"s (cid:373)o(cid:396)e likel(cid:455) it (cid:449)ill (cid:396)ai(cid:374) to(cid:373)o(cid:396)(cid:396)o(cid:449) i(cid:374)stead of toda(cid:455)(cid:863) (cid:862)i"d sa(cid:449) it"s a fift(cid:455)-fifty bet that your b(cid:396)akes (cid:449)ill (cid:374)eed (cid:449)o(cid:396)k (cid:271)efo(cid:396)e (cid:455)ou sell the (cid:272)a(cid:396)(cid:863) (cid:862)i thi(cid:374)k i"(cid:448)e got a(cid:374) (cid:1012)(cid:1004)% (cid:272)ha(cid:374)(cid:272)e of getti(cid:374)g that jo(cid:271: the formal definitions and properties of probabilities are the same as our everyday, implicit use of them.

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