Scales used to express measurements, usually ratio, interval, ordinal or nominal scales.

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29 views

How to plot a Semantic Differential profile in R? [closed]

It looks like it's a problem to find R code for plotting a Semantic Differential profile. The only I hardly found: https://github.com/justineuro/sdRplot. Here is the output example, visit . But it ...
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1answer
30 views

Effects in metaanalysis forest plots - what are the conclusions?

In metaanalysis results are often reported in forest plots, where multiple studies are included. Different, continuous outcome scales are used to measure the effect of a treatment on the course of a ...
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6 views

How to extrapolate when feature scaling

Feature scaling refers to a transformation of a variable $x$ so that it lies in range $[0, 1]$: $x' = \frac{x - \text{min}(x)}{\text{max}(x)-\text{min}(x)}$, and it depends on the maximum and ...
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13 views

MLE: Does the scale of predictor variables affect whether the hessian is positive definite?

I am trying to fit a regression via maximum likelihood estimation, one of the regression terms involves $\beta_0e^{(\beta t)}$ where $t$ is measured in hours and has a range of 0 to 90 days. The ...
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137 views

Sum of rating scores vs estimated factor scores?

I'd be interested to receive suggestions about when to use "factor scores" over plain sum of scores when constructing scales. I.e. "Refined" over "non-refined" methods of scoring a factor. From ...
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1answer
47 views

RMSE is scale-dependent; is RMSE%?

I've got a graph of RMSE% vs. unit size and it declines nicely. Is this scale-dependence or does the "%" compensate for that? $$ \text{RMSE%} = 100\% \cdot \frac{\sqrt{\frac{1}{n}\Sigma_{i=1}^n (y_i ...
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1answer
12 views

Evaluating a pretreatment predictor with repeated measures ordinal data

I am currently attempting to study whether particular baseline factors predict pre/post changes in relation to a substance use intervention. However, a few things have me stumped. Our substance use ...
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7 views

Is there a correct way of comparing two different 'scales' of the same range?

Is there a correct way of comparing two different scales (for example; data which comes from a 4 option question and data which comes from a 7 option question) given that both datasets have the same ...
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33 views

How to interpret the fit of cfa (sem) outcome?

I did some CFA analyses (using R package Lavaan) on several scales in order to check the unidimensionalities. If I understood well scale 5, 6 and 7 can be considered a good fit because of the RMSEA ...
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13 views

How to calculate the mean of scale with scale and ordinal items measures in SPSS?

I have a scale called - Facebook Intensity Intensity, with 8 items, adapted from https://www.msu.edu/~nellison/TOIL/scales.html 6 out of 8 items are SCALE Measures, but others are ORDINAL as there ...
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15 views

scale and rescale the data predicted from neuralnetwork

i am trying to use neuralnet or mlp function on my data and then iuse to predict on my test data output [B], at the beginning i am using this code to rescale my data : maxs <- apply(data, 2, max) ...
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29 views

A feature of several items (likert scale) - one score is needed

Currently I am analysing the quantitative analysis data of my final Marketing project in SPSS and I have a doubt: I have conducted a survey with some questions grouped into 4 features (Trust; ...
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23 views

Combining binary and ordinal variables in a single scale for use as dependent variable

My brain is failing to come up with the right search terms to remind myself how to do this... I have two variables, one indicating a yes/no decision and the second indicating the respondent's ...
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53 views

How can I estimate the personal parameter (theta) with IRT in R?

I would like to obtain the individual personal ability (theta) estimate under 1PL and 2PL IRT model. I have already the item responses of every participants, how can I do this using the R package? I ...
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1answer
28 views

How can I make a grading scale more objective?

I want to come up with an at least slightly more objective scale than the one found here: https://www.profootballfocus.com/about/how-we-grade/ In the link, each play for each football player is ...
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8 views

Question about scales and z-scores

I have 1000+ evaluations of 65 students by faculty. Two different eval forms, each evaluating the student in 5 areas, but 2 different scales: 1 a 3-pt scale; the other a 4-point scale.I'm thinking ...
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1answer
25 views

Can Best-worst (Max-diff) scaling experimental designs be blocked?

To enable a large number of items to be used (i.e. generally more than 15 or 20), can Best-worst (Max-diff) scaling experimental designs be blocked for respondents? Could anyone suggest any material ...
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21 views

How to justify construct validity when items dropped from established instrument?

I conducted a survey in which I used the Major Depression Inventory (MDI). While analyzing this instrument (as my Depression construct) in SmartPLS, I iteratively dropped items that had ...
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1answer
23 views

Combining two scales

So, I have two scales, A and B, both ranging from 0 to 10. I would like to combine these into one as follows: At one endpoint, high values on A and high values on B At the other endpoint, high values ...
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8 views

Metanalysis of normalized mean values - How to normalized the standard deviation

This is my first question here so I am not sure if will frame it correctly. I am trying to do a simple metanalysis of raw means comparing a psychological assessment (i.e. depression level) in two time ...
3
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1answer
41 views

Non-Significant difference between individual items, but significant difference between overall scores

Say that we have a scale measuring Healthiness of Diet, and want to see if two populations have different levels of Healthiness of Diet. If we find that the difference between the two samples at the ...
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26 views

Which classifiers need feature scaling? [duplicate]

Is feature scaling (for example mean normalization) always preferred or can it sometimes lead to poor accuracy? How do I know whether I should perform feature scaling or not? Which tasks/classifiers ...
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1answer
34 views

Assessing distribution of a Likert scales

I am looking to analyse Likert scales, and want to assess whether there is 'sufficient variation' along the scale [i.e. that the majority of respondents are not 'clumped together' or a particular ...
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15 views

What specific Reliability measure can be used in SPSS when multiple scales are used?

I have a survey of 360 individuals. I asked them questions with different types of answers (scales). I have few questions with Yes/No, few questions with multi-categorical answers (types of ...
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2answers
209 views

Can binary data be ordinal?

Binary data is often mentioned as a nominal sub-category, especially in such examples as female/male, smoker/non-smoker, etc. However, binary data with such values as pass/fail, correct/incorrect, ...
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1answer
43 views

What level of measurement are names by letters?

A respondent had to correctly recall the name of a character from the scenario. Both the first and the last names consisted of 5 letters each. For each letter, the respondent would get 0.2 points. If ...
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1answer
36 views

variable transformation in optimization

I have an optimization problem with two sets of parameters, $x_i \in [0,1]$ and $y_k \in [-\frac{\pi}{2},\frac{\pi}{2}]$ where $i,k \in \{1...n\}$ are indices. One way to solve this problem is using ...
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55 views

Computation of factors after factor analysis

I have run a principal axis factor analysis and I want to form scales for each factor. To be more specific, after having run the FA, I would like to select all items that load in a specific factor and ...
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1answer
39 views

Scikit-learn Scaled Data - Means Not Zero

I tried to scale the data by referring to the link as follow: http://scikit-learn.org/stable/modules/preprocessing.html However, when I checked the data distribution, the mean returned is NOT ZERO. ...
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1answer
92 views

Rule of thumb for using logarithmic scale

When I am given a variable, I usually decide wether to take its logarithm based on gut feeling. Usually I base it on its distribution - if it has long tail (like: salaries, GDP, ...) I use logarithm. ...
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29 views
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38 views

Age rounded down. Ordinal or Ratio?

Usually age is rounded down (i.e $15.7\simeq 15$). So shouldn't we treat it as an ordinal and not a ratio scale variable? If this is a duplicate question, please refer me to the duplicated question.
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30 views

Summative likert scale [duplicate]

I am looking for a relationship between two summative likert scale. Each one of them contains 7 items. The scale used for each item consists of 5 points. What is the best tool to use?
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38 views

How should I combine this binary scale with this 4-point scale?

I'm doing a meta-analysis and I want to combine the results of two questionnaires. One questionnaire has 30 questions about whether you've experienced certain traumatic life events. They're all ...
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32 views

Likert scale dependent variables

I am doing a research about the ethics in pharmaceutical industry. I've chosen 7 branding activities followed by pharmaceutical companies. I want to study the relationship between the perception of ...
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24 views

Finding a scale matrix of multivariate Cauchy distribution given a border of credible region

I want to solve the following problem: I have a multivariate Cauchy distribution, centered at $\mu$, with unknown scale matrix $\gamma$. Now I receive a data point (blue $x$ in the picture) and my ...
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155 views

When and why to use scale function (in R) in PCA analysis?

I understand that if the scale of the different variables varies(for example, some expressed in absolute form while other in percentages), that will cause problem in Principal component analysis ...
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18 views

Rescale two variables with respect to another and keep ratio

I hope this question is not too trivial. Assume that I estimated three variables in a mixed ordered probit MLE procedure: -$lt$: lower threshold -$ut$: upper threshold -$mu$: the latent variable ...
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71 views

Is there an alternate $\chi^2$ calculation useful for data spanning a large scale?

I have experimental small angle scattering data which provide information about the structure of a molecule. I can use a PDB file of a molecular structure (contains all the atom names and ...
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76 views

scale & why normality does not matter

So I was looking at the world happiness report 2013. In most of their questions they used "0 to 10 end-labelled scale". So ya, basically "0, 1, 2,.., 9, 10". I understand that these kind of scale data ...
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448 views

Independent and Dependent variables use different scales

How to deal with questionnaire, where 40 questions that represent 8 independent constructs use 5-point Likert's scales and another 5 questions that represent dependent variable use 6-points Likert's ...
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1answer
27 views

Scaling behavior of the width of a distribution

I'm considering the following distribution on the interval $[-1,1]$: $$p(x)=\frac{1}{N}(1-x)^{n-p}(1+x)^p$$ where $N$ is a normalization factor while $n, p \in \mathbb N $ and $2\leq n$ and $ 1\leq ...
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8 views

measuring loyalty scale

I have 8 items measuring one construct "Loyalty". Basically what I need I want to test if there are some questions that can be removed without any loss of information. How to achieve this, which tests ...
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11 views

one construct - two dimensions - test

Let say a) I have 4 questions that measurs LOY_ATT (attitudinal loyalty) b) I have 4 questions that mesature LOY BEH (behavioral loyalty) I want to test if "loyalty" consisting for those two ...
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1answer
28 views

Forecasting model - Scale mismatch

I have the following data: As you can see I want to create a regression model, which forecasts a variable, which I have also on a quartely basis. However, my volume is only on yearly basis. Is ...
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1answer
16 views

How to test that two covariates have the same impact on dependent variable?

Given the model $y =\beta_0 + \beta_1 x_1 + \beta_2 x_2 + u $ where $x_1$ and $x_2$ have completely different scales and units, is it possible to test whether their impact on $y$ is the same? i.e. ...
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43 views

how to estimate scale variance only using item sd's and scale reliability

The problem I encounter is that I need to estimate the scale variance of a psychometric scale without having the original data. The only information I have is the means of the (binary) items, their ...
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1answer
182 views

how to calculate expected sample scale mean and sd based on the means and sd's of its dichotomous items?

I am developing a new psychometric scale consisting of a several dichotomous items taken from a larger item bank. The p values (item means) are known. Now I need to calculate the expected mean and ...
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190 views

Alternative notions to that of proper scoring rules, and using scoring rules to evaluate models

A scoring rule is a means of evaluating an agent's guess of the probabilities associated with a categorical event, given a (categorical) outcome of the event. Depending on the guess and the observed ...
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56 views

Likert scale and correlation: when respondents are asked whether or not they agree with a statement

I'm having trouble figuring out how to go about applying correlation and/or regression to a set of Likert scale items that are statements that ask the respondents whether they feel two items are ...