Class: P 211 Lecture 5Review: NO REVIEW Outline of Current Lecture: I. Boot strapping II. Convincing yourself III. Digression IV. Our assumptions V. Bottom line Boot strapping  We are going to have a neutral condition not a congruent condition  Two steps after you finish collecting datao 1. Convince yourself what happened o Convince others that your understanding of the results is correct. How do you know if your experiment “worked”?  Good experiments “work” regardless of the outcome. You will not be judged on the results of your experiment, only on how it was conducted and communicated. 1st step Convincing yourself  You get a result (one condition is faster than another)o How do we know if the difference is real? o In other words: if you did the experiment again, how likely would it be that you get the same results  The more often you get the same result the more confident you become that your difference is real. Digression: populations and Samples 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. For the stroop experiment you’re probably interested in the behavior of people who are o Normal (not mentally ill)o Physically- able (able to press a button)o Adult (able to follow instructions)o Able to speak English (able to understand you)Clicker Question  During an election, people often conduct telephone polls to find out which candidate is wining. The people chosen from these telephone surveys are the… Answer: Sample – if you’re chosen for a survey then your in are in the people who will be sampled from an initial population  To get the most accurate projection, what is the population that the telephone pollsters aretrying to sample from Answer: People who are likely to vote in the election Our Assumption:  Undergraduate psychology students are representative of how most normal adult humans would behave.  If we randomly sample 8 college students for our stroop experiments and get a result, thatresult will likely apply to all college students, and we assume that college students are representative of all adults.  Boot strapping is when you take the results that you got and create new results as if it were representative. How does boot strapping work Tennis ball exerciseResampling: What’ll Happen  Sometimes you’ll get the difference that you observed  Sometimes you’ll get no difference between the two conditions  Sometimes you’ll even get the opposite difference between the two conditionsThe Bottom line:  If you “run” the experiment you will get a 95% success rate of