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Rank of the items of a survey based on Likert scale, in R programing. I've been able to go all the way to using the likert package in R. My difficulty is and convert the scale according to the "Psychological Distance Between Categories in the Likert Scale: Comparing Different Numbers of Options" (Wakita 2012) proposition, and assign the result of the converted scale to the argument "importance" of the linkert function. A good part of Wakita's work (2012) ([login to view URL]) has already been made by Jason M. Bryer ([login to view URL] ), Only missing the scale conversion according to Muraki's GPCM model. My work is being modeled on R, and I hope its results are also delivered in R. Usage of likert ([login to view URL]): likert(items, summary, grouping = NULL, factors = NULL, importance, nlevels = length(levels(items[, 1]))) "importance: a data frame of the same dimensions as items containing an importance rating for each item. The order of columns should match and the names from items will be used" All models IRT are now ready in R. The MIRT ([login to view URL]) package already does Muraki's GPCM calculations. All this I can do. Since I am neither a statistician nor a mathematician, I had difficulty transforming the scale (as proposed by Wakita), and that is what my job offer is focused on. Look at my steps: head(tdata[, substr(names(tdata), 1, 3) == "I2_"]) I2_1 I2_2 I2_3 I2_4 I2_5 I2_6 I2_7 I2_8 I2_9 I2_10 I2_11 I2_12 I2_13 I2_14 I2_15 I2_16 I2_17 I2_18 I2_19 I2_20 I2_21 1 5 4 4 2 4 2 5 4 5 5 2 2 5 3 4 4 4 4 4 4 5 2 5 2 4 5 5 5 5 4 3 3 2 2 3 3 5 4 5 4 3 5 3 3 5 5 5 4 5 4 5 4 5 3 3 2 4 4 5 4 3 5 3 4 4 4 2 4 3 4 4 4 4 4 3 2 3 3 4 3 4 4 4 3 3 4 3 5 4 4 3 4 5 3 3 4 4 3 3 3 5 4 5 3 4 3 5 5 4 6 5 3 3 4 4 5 4 3 2 2 3 5 3 3 2 4 2 3 3 3 4 I2_22 I2_23 I2_24 I2_25 I2_26 I2_27 I2_28 I2_29 I2_30 I2_31 I2_32 I2_33 I2_34 I2_35 1 4 2 2 4 5 4 4 4 4 4 4 4 4 5 2 2 5 3 4 4 4 4 5 4 3 2 4 4 5 3 5 5 2 3 3 4 4 3 2 3 3 3 5 5 4 5 3 3 3 3 4 3 2 3 5 3 4 3 5 5 4 4 3 5 3 5 3 4 5 4 5 3 4 5 6 5 3 4 3 5 2 2 2 2 5 2 4 3 5 [login to view URL] <- mirt(tdata[, substr(names(tdata), 1, 3) == "I2_"], 1, "gpcm", SE=T) coef([login to view URL], simplify = TRUE, IRTpars = TRUE) $items a b1 b2 b3 b4 I2_1 0.80 -4.9 -3.29 -1.693 -0.16 I2_2 1.12 -4.3 -1.69 0.500 2.24 I2_3 0.67 -3.7 -5.09 -2.018 -0.92 I2_4 0.86 -4.4 -3.79 -1.081 0.68 I2_5 0.99 -4.6 -2.08 -0.787 NA I2_6 0.66 -3.5 -2.49 -1.344 NA I2_7 0.73 -4.4 -4.09 -1.985 -0.32 I2_8 1.02 -3.9 -1.61 0.166 NA I2_9 0.74 -4.6 -2.80 -0.009 2.06 I2_10 0.71 -4.0 -1.90 0.550 2.28 I2_11 0.64 -3.2 -2.10 -0.220 1.44 I2_12 0.42 -4.1 -3.43 0.849 2.07 I2_13 0.83 -5.4 -3.06 -0.628 1.28 I2_14 0.79 -3.7 -2.86 -0.063 0.65 I2_15 1.10 -3.1 -3.89 -1.625 0.29 I2_16 0.96 -4.5 -3.16 -1.048 1.16 I2_17 0.85 -3.2 -3.12 -0.455 1.32 I2_18 0.85 -3.9 -3.14 -0.549 0.59 I2_19 0.83 -3.2 -3.49 -0.899 1.08 I2_20 0.93 -3.2 -3.44 -0.895 0.80 I2_21 0.75 -4.4 -2.70 0.189 2.48 I2_22 0.78 -3.4 -3.86 -1.796 -0.79 I2_23 0.86 -3.6 -4.55 -1.189 0.66 I2_24 0.72 -3.7 -1.80 0.745 2.22 I2_25 0.70 -4.0 -0.92 0.463 NA I2_26 0.87 -3.6 -2.54 -0.339 1.56 I2_27 0.99 -2.9 -1.37 0.392 NA I2_28 0.96 -4.5 -2.52 -0.196 1.53 I2_29 0.91 -3.0 -2.33 0.268 1.90 I2_30 0.66 -3.6 -1.64 0.791 2.90 I2_31 0.88 -4.6 -3.37 -1.204 0.38 I2_32 0.67 -3.6 -1.40 0.104 NA I2_33 0.66 -5.5 -4.14 -1.176 0.46 I2_34 0.83 -3.1 -2.88 -0.168 1.59 I2_35 1.29 -4.1 -1.86 -0.278 NA And I need to do the conversion of the items (like Wakita´s model)
Project ID: 13588486

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7 freelancers are bidding on average $222 USD for this job
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Bid Summmary Greetings sir, i am an expert freelancer for this job and your 100% satisfaction is assured if you allow me to serve.
$300 USD in 3 days
4.9 (207 reviews)
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Hi I am a very experienced statistician and academic writer. I have completed several PhD level thesis projects involving advanced statistical analysis of data. I have worked with data from several companies and have done projects involving high level quantitative analysis and data interpretation skills to study the trends, time behaviour and compare the variables in the data. I can do advanced level analysis in SPSS, R, WEKA, TABLEAU and excel tools like machine learning, hypothesis testing, forecasting, T-test, ANOVA etc. Looking forward to discussion, Best Regards, Suyash
$350 USD in 3 days
4.7 (132 reviews)
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I have a strong background of theoretical statistics and probability theory.I graduated from Indian Institute of Technology, Kharagpur in 2016. I have experience of implementing Factor Analysis, Principle Components analysis, multivariate regression , ANOVA , Regularized regression methods like LASSO and Elastic net, classification and regresison trees, Monte Carlo methods etc. in R. I have attached a few of my codes on my profile. I have had the opportunity of working as a research assistant at IIM Lucknow, where I looked into a data set pertaining to market advertisements , and I gained some experience in statistical learning. I ,also, worked in Nomura as an investment banking intern in the equity derivatives team. I have had the exposure to financial derivatives and have worked on momentum based strategies. I had taken up another project at IIT Kharagpur , which was pertaining to statistical learning , especially localized regularization. I have the experience of working on Excel VBA and R. I have sound knowledge of Linear Algebra, Mathematical analysis and probability theory. I am, currently, exposing myself to machine learning and a study of the theory of derivatives pricing.
$200 USD in 5 days
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Hello, how are you? I hope you have a bright day/evening from your side. I have read the details provided, but please contact me so that we can discuss more on the project. I believe I have the required skills in this case. I will work on your requirements personally since I do not outsource to third parties, this guarantees you high-quality work that is delivered on time. You can also request for revisions till you’re fully satisfied with the work. I believe writing is a passion and not a money making business where people will deliver low-quality work just to get paid. Try my services, and you will never regret. Waiting for your kind response
$147 USD in 3 days
4.8 (17 reviews)
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Dear Client, Your job posting catches my attention and I submit the proposal as a desired candidate. I'm a full time freelancer experienced in Lead Generation, Virtual Assistant, PDF conversation, Social Media Marketing, Data entry, Web research,MS excel, MS word, MS Powerpoint Presenation, Google docs, Adobe Photoshop. My typing speed is 45 wpm. I'm reliable, highly organized, dedicated, detail-oriented and have positive attitude. I can offer affordable, fair rate and high quality of work. My goal is to complete any task on time and to develop a long term relationship with my clients. Waiting for your reply soon. Thanks, Emamul Hassan
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I have fluent written and verbal English skills. I am hard working, dependable, punctual, and available full-time. I have a good understanding and grasping capabilities. You can look at my resume in the portfolio section at http://freelancer.com/u/allenross356.html Also, you will notice I have completed over 150 projects with good ratings and reviews. Please let me know if you would like to hire me.
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Bid Summmary Hey there, I have read your job description and i have some questions too so message me to discuss more. Thanks
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