16 May WHAT CONSTRUCT DOES THIS HYPOTHETICAL INSTRUMENT MEASURE.
The Measurement Model
- Using the Rasch formula what is the probability of getting an item right for a person with a theta of 4 assuming an item difficulty, delta, of 3 (show all work).
- Open the data in the folder pf10_dich. What is the estimated theta for the person with research id: 716405B (look in Name column).
- Compare this person’s theta (person 716405B) with all of the item deltas. Which items would you expect this person to get a 1 score at least 50% of the time?
- Compare this person’s theta (person 9413932) with all of the item deltas. Which items would you expect this person to get a 1 score at least 50% of the time?
- Which item (or items) is the most difficult and which item (or items) is the easiest.
- Which item seems to be problematic in terms of not fitting the Rasch Model very well. (Use the outfit statistic). How would you describe this item using variable screening methods for skewness and kurtosis. Any evidence for floor or ceiling effects.
- For the item identified in #7, what does the infit value suggest with respect to this item. Is the item contributing less to the overall estimate of the thetas in the sample than the other items that are not problematic in terms of fit to the Rasch Model. Does this value suggest that the outfit value for this item was perhaps not so bad afterall.
- Please use dataset “for HW 3 and 4.xls”. This is an excel file. Enter this data into the ConstructMap software. Cutting and pasting saves time. Create names for the variables. Pretend this dataset was obtained from a measure in your research area of interest:
- List each of the 10 variables.
- What construct does this hypothetical instrument measure.
- Run a Rasch Model analysis for these data.
- Report the average theta value (you may need to copy the thetas into SPSS).
- Using the Wright Map, which item would you expect only the highest theta
individuals to obtain a 1 over 50% of the time? What else can you do to see if this item is indeed a very hard item?
Our website has a team of professional writers who can help you write any of your homework. They will write your papers from scratch. We also have a team of editors just to make sure all papers are of HIGH QUALITY & PLAGIARISM FREE. To make an Order you only need to click Ask A Question and we will direct you to our Order Page at WriteDemy. Then fill Our Order Form with all your assignment instructions. Select your deadline and pay for your paper. You will get it few hours before your set deadline.
Fill in all the assignment paper details that are required in the order form with the standard information being the page count, deadline, academic level and type of paper. It is advisable to have this information at hand so that you can quickly fill in the necessary information needed in the form for the essay writer to be immediately assigned to your writing project. Make payment for the custom essay order to enable us to assign a suitable writer to your order. Payments are made through Paypal on a secured billing page. Finally, sit back and relax.
About Writedemy
We are a professional paper writing website. If you have searched a question and bumped into our website just know you are in the right place to get help in your coursework. We offer HIGH QUALITY & PLAGIARISM FREE Papers.
How It Works
To make an Order you only need to click on “Order Now” and we will direct you to our Order Page. Fill Our Order Form with all your assignment instructions. Select your deadline and pay for your paper. You will get it few hours before your set deadline.
Are there Discounts?
All new clients are eligible for 20% off in their first Order. Our payment method is safe and secure.