PSYCH 350 1st Edition Lecture 16 Outline of Last Lecture I monocular view II binocular view III yonas IV kinesthesis Outline of Current Lecture II Discriminating faces III The other race effect IV Perceptual tuning V Threshold screening Current Lecture children who grow up in environments with only white are better at discriminating white faces lemur video under 6 months younger baby can tell the different between the lemurs they can recognize the difference between primary faces brain can not stay this way because there are too many connections human babies look mainly at human faces so they lose their ability to differentiate between primates over 9 months cant tell the difference between lemurs like the rest of the population the other race effect babies can discriminate all race of faces These notes represent a detailed interpretation of the professor s lecture GradeBuddy is best used as a supplement to your own notes not as a substitute but by nine or 10 months of age they are much better at discriminating their own race perceptual tuning perceptual narrowing loosing ability to discriminate faces of primary animals graph perceptual tuning is actually tuning of the wiring of our brain hear sensitivity hearing screen threshold screen little beeps of sounds low freq and high frq to see what children can hear adults freq is bottom curve babies can hear much better at birth than they can see hearing develops better than vision hear better at birth than you can see because last 4 6 weeks dark in utero hearing sound is conveyed lo of auditory stimulation high amplitude sucking attaching to a blind pacifier nipple no hole in them hook them up to pressure gauge and record how hard the baby is sucking at one point usually suck suck suck suck then pause and then repeat study two groups of moms reading books twice a day sitting on the couch the last four weeks of progeny prosody cat in the hat book of the voice the other book as the king the mice and the cheese after babies were born gave them a choice to listen to both books figured out by sucking on the nipple if they suck hard they get the book that was being read if they didnt suck they would take the other story babies who heard the cat and the hat as a fetus would listen to that book once born the kids arent learning words they are learning prosody video parents want to praise child all do it in the same melody rise fall melody stop short stop look rising pitch higher pitch comforts Voice onset time phoneme different in speech sounds that carry meaning example hat and that distinction between pa and ba P and B very similar sounds acoustically different in voice on set vocal cords vibrate as soon as they start for B vocal cords are delayed for P categorical perception either pa or ba category babies cant tell difference if you give two on one side and then two on the other if you take a sounds and then switch to another sound they can tell the difference video Japanese s cant distinguish between r and L