10 21 15 PSY 317 Notes Extra Credit Question Favorite singer is Freddie Mercury Homework due on Sunday at 11 55pm Next Week Lecture on Monday review at the end of class and Exam on Wednesday Signal Detection Theory Use for Homework Say you are presented with a face and asked to recall it Yes HR No FA HR Hit Rate You see the face and you recognize the face FA False Alarm You see the race you do not recognize the face but you say you do Hit Rates and False alarm rates are independent of each other o Criterion Low Criterion say yes to every face Pros 100 hit rate you will say yes to every face you have seen Cons High FA rate you will also say yes to every face you haven t seen o Example Say you are the victim of a mugging When asked to identify the perpetrator s face you will be more willing to make a false alarm because you really want that guy to be punished High Criterion say no to every face Pros Low FA rate you will say to no to every face you have not Cons 0 hit rate you will also say no to every face you have seen seen Medium Criterion is ideal Discrimination Index A A or A Prime o Scale of 0 5 1 0 5 is terrible 1 0 is perfect 10 21 15 May explain how resources are allocated when dividing attention all while considering our goals and priorities however it CAN make mistakes o Focusing too many resources on a less important task focusing on less important Executive Control Cont goals Practice and Attention In our driving example one of the ways that we explained how we are easily able to divide our attention across multiple tasks is through experience o But what do we mean by this Practice diminishes resource demand o With practice a task requires fewer cognitive resources OR less frequent use of these resources Consolidate information with practice no longer have to think through the steps but rather the general process Example starting your car and putting it into gear Sometimes you can even practice one activity while you perform another o Example work through the fingerings of a song on an instrument while you watch TV or talk to a friend Develop expectations Know what may happen and how you will handle it Automaticity o Point at which a behavior becomes automatic instinctual no longer have to think about it resources Controlled tasks new tasks that vary in their demands Automatic tasks familiar tasks that require few if any cognitive o Helpful because it frees up cognitive resources o However automatically reacting can be problematic too Stroop Effect Class Exercise o You will see a word that describes a color red yellow blue etc However the ink color they are written in may not match the name of the Only say the name of the ink color not the color that is written color Wrapping up Divided Attention o Basic Ideas Cognition requires resources and these resources are limited Factors influencing how resources are distributed Nature of the task How well practiced the task is 10 21 15