2. Visual Obj Recog

Question 1

what property used for obj categorization

Answer 1

skeletal models of shape, spatial relations, not local features

Question 2

why use computational models

Answer 2

give us complete control of variables, concrete hypotheses, working example of theories

Question 3

infants use skeletal shape exp? what about DNN

Answer 3

Habituation to a skeleton, show same (diff local features) or diff skeleton, look longer to diff skeleton.
Babies use skeleton for categorization, skeletal model matched babies too
DNNs use local features, not skeleton

Question 4

2 streams of object recog

Answer 4

dorsal stream for where, spatial relation, right posterior IPS
ventral stream for what, features

Question 5

What dorsal stream use for categorization

Answer 5

skeletal models, (fmri) dorsal activation and categorization predicted by computer that uses skeletal models

Question 6

Dorsal to ventral info?

Answer 6

(eeg) Dorsal cats are decoded earlier than ventral cats, so dorsal info sent to ventral to inform cats
complete reps achieved from dorsal and ventral

Question 7

devo of dorsal stream

Answer 7

rsfMRI, dorsal network looks like adult network in 1-day-olds, ventral still developing

Question 8

dorsal plasticity, hemispherectomies

Answer 8

in lateralized functions, and hemispherectomy patients
ventral stream functions were reorganized
dorsal functions were not reorganized
dorsal not as plastic bc devo’d already