EDHD 411 Lecture Notes - Lecture 7: Number Sense, Object File, Dishabituation

• School: University of Maryland
• Department: Education, Human Development
• Course: EDHD 411
• Professor: Lucas Butler

Document Summary

Object representations: track a small set of things limited to 1-4 objects. Cant track more than that, so next system comes in. Approximate number system (ans: measures approximate quantity, does(cid:374)"t t(cid:396)a(cid:272)k ide(cid:374)tit(cid:455, ratio dependent. Neither of these represent integers: object represenations are limited to 1-4, cannot represent this set exactly without counting, app(cid:396)o(cid:454)i(cid:373)ate (cid:374)u(cid:373)(cid:271)e(cid:396) s(cid:455)ste(cid:373) does(cid:374)"t (cid:396)ep(cid:396)ese(cid:374)t e(cid:454)a(cid:272)tl(cid:455) seven. 1 vs 2- easy to see the difference. 11 vs 12 hard to see the difference. Arithmetic: keeping track of objects if they keep track of objects, and one is hidden, and they see it- they might be surprised when the same number is there look at the slide: opening a new object file drawer. Large (approx. ) number representations this is a noisy (approx. ) representation: the larger the number, the more noise. Discrimination between two numbers depends on the ratio between them: 1:2=2:4 = 3:6. Shown two displays, both novel with respect to contunous extent.