Class Notes (809,757)
Canada (493,779)
NESC 3227 (19)
Kim Good (19)

January 15th, 2013.docx

4 Pages
Unlock Document

Dalhousie University
NESC 3227
Kim Good

January 15th, 2013 January-15-13 12:58 PM Language asymmetry: Commissurotomy  Midterm question about this  Cutting of the corpus callosum  Used for individuals with contractible epilepsy  Very invasive procedure  Research on people having this procedure done will help in determining in which hemisphere is language dominant  In this experiment, images are shown only for a very brief amount of time, that way the image only ends up in one hemisphere or the other  So in experiment with subject who has undergone commissurotomy o If spoon presented in right hemisphere, subject says I see spoon o But if presented in left hemisphere, they say I see nothing  However if asked to pick what they saw by feel only, they will pick the spoon Compare utility of dichotic listening, fMRI and WADA in a clinical setting  Advantages  Disadvantages o If you're too fat, have metal fragments in your body, can't have MRI, so WADA beneficial in that sense Dissociation of Function  On the behavioural level, dissociation of function denotes the finding that performance on one task is impaired while performance on a second is not  Have a particular brain area removed, test o Group a scores 100% on reading o But only 20% on writing Single dissociation  Group X receives right temporal lobe lesion is impaired in singing task, but not in the speaking task o From this you can say lesion x is associated with an impairment on task A  Group y does not undergo lesion surgery is not impaired in either of the tasks  There is limited inference in this. Restricted to cognitive performance in one group only Reciprocal (double) dissociation  Group A has lesion in one area, group B in completely different area o Results show impairment in opposite function  So the functions are said to be separable in the brain, in other words, doubly dissociable  Can be used to localize a function to a particular hemisphere Chapter 12 Variations in cerebral asymmetry: sex/gender differences  Meta analysis o A method for synthesizing information Differences between men and women  Mathmatical o Women better at mathematical calculation, o Men better at word and reasoning problems  Men better at mental rotation tasks  Women better at remembering displaced objects So what?  Problems interpreting group differences o What does it mean when one outperforms another?  Statistically o Hypothetical task where men outperform women  Men's mean score is slightly faster than females  But distributions pretty similar o Tests the null hypothesis that the difference between 2 groups is larger than chance alone  Magnitude o Meta-analysis and effect size o Difference usually not that much  Practical differences o How do these differences affect us in real life settings? Distributions of scores  There's more distribution within one sex then there is between sexes Two ways to review the literature Traditional way  o Search through database of all the topics and papers on that topic o You'd then give a narrative of what your conclusion is based on your research  Kind of like what they do in the textbook  Since 1970's o Meta-analysis  Comparison of many studies that have been put together in a computer prog
More Less

Related notes for NESC 3227

Log In


Don't have an account?

Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.