class: center, middle, inverse, title-slide # IDS 702: Module 3.4 ## Multinomial logistic regression (illustration) ### Dr. Olanrewaju Michael Akande --- ## Analysis of Sesame Street Data - The television series Sesame Street is concerned mainly with teaching preschool skills to children age 3-5, with special emphasis on reaching economically disadvantaged children. -- - In the early 1970s, researchers at Educational Testing Service (the company that runs the SAT) ran a study to evaluate Sesame Street. -- - To ensure the study contained a group of children that watched Sesame Street regularly, they randomly assigned children either to receive encouragement to watch Sesame Street or not to receive encouragement. -- - Those assigned to encouragement were given promotional materials, and received weekly visits and phone calls from ETS staff. Those assigned not to receive encouragement did not get this attention. -- - The children were tested on a variety of cognitive variables, including knowledge of body parts, knowledge about letters, knowledge about numbers, etc., both before and after viewing the series. -- - .hlight[Let's predict how often the kids watch sesame street, with focus on whether encouragement pushes them towards more viewing.] --- ## Analysis of Sesame Street Data The data is in the file `sesame.txt` on Sakai. .mini[ Variable | Description :------------- | :------------ viewcat | 1=rarely watched the show <br/> 2=once or twice a week <br/> 3=three to five times a week <br/> 4=watched the show on average more than 5 times a week viewenc | 1=child encouraged to watch, 2=child not encouraged to watch site | 1 =Three to five year old disadvantaged children from inner city areas in various parts of the country. <br/> 2 = Four year old advantaged suburban children. <br/> 3 = Advantaged rural children. <br/> 4 = Disadvantaged rural children. <br/> 5 = Disadvantaged Spanish speaking children. sex | male=1, female=2 age | age in months setting | setting in which Sesame Street was viewed, 1=home 2=school prebody | pretest on knowledge of body parts (scores range from 0-32) prelet | pretest on letters (scores range from 0-58) preform | pretest on forms (scores range from 0-20) prenumb | pretest on numbers (scores range from 0-54) prerelat | pretest on relational terms (scores range from 0-17) preclasf | pretest on classification skills ] --- class: center, middle # In-class analysis: move to the R script [here](https://ids-702-f20.github.io/Course-Website/slides/Sesame.R) --- class: center, middle # What's next? ### Move on to the readings for the next module!