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0
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0answers
3 views

Should I standardize or rescale with polynomial regression as alternative to difference scores?

I am working with a model that uses polynomial regression combined with response surface modelling as an alternative to difference scores in regression: ...
1
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0answers
31 views

How to normalize the data to [0, 1] in R with data similar to χ²-distribution without shrinking lower values too much?

I want to normalize the data to [0,1], but the distribution of this array is quite not regular, having large quantity of low values and small quantity of large values, almost 80% values of data are in ...
2
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2answers
21 views

Scales of Measurement

when we use the term " scales of measurement", what do we mean by scale by Measurement ? As far i know, measurement denotes "a value" and scale denotes "the unit" of the value. So if i say, ...
4
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3answers
225 views

When should I apply feature scaling for my data

I started a discussion with a collague of mine and we started to wonder, when should one apply feature normalization / scaling to the data? Lets say that we have a set of features with some of the ...
0
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0answers
11 views

Partial least squares regression on survey data with multiple scales

I have a survey data set composed of 7 scales, each scale with 7 to 10 items. The theoretical framework I've devised uses 5 of the scales as independent variables and 2 of the scales as dependent ...
0
votes
1answer
17 views

revert minmax normalization back to original value

i'm training a neural network. Normalization of inputs and outputs (training data) are carried out using min Max to a scale of [0-1]. I'm applying backpropagation learning algorithm. Firstly, i need ...
0
votes
1answer
26 views

libsvm: scaling data results in less features?

I've scaled my training and testing data in BASH like so: ...
0
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0answers
21 views

Latent Class Analysis vs Rasch Analysis

I hope everybody is well :) I was wondering if anybody could explain the core, philosophical/conceptual differences between Latent Class Analysis and Rasch Analysis. I'm not necessarily referring to ...
0
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1answer
18 views

Need help with deciding on statistical test for three separate instruments

So I am trying to analyze my data. I used the following scales: Brief RCOPE, the Brief Multidimensional Measure of Religiousness/Spirituality (BMMRS), and the Satisfaction with Life scale (SWLS). They ...
2
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2answers
78 views

Why does the scaling of feature vectors improve performance of SVM classifier?

I've found that performing scaling in SVM problems really improves the performance of SVM ... But I don't understand why! I have read this explanation: "The main advantage of scaling is to avoid ...
0
votes
1answer
15 views

what “non-continuous nature of scores” means

1) Can someone explain me the idea of this sentence: "It is noted that nonparametric tests were employed because of the non-continuous nature of the scale scores" (this is related to scale validity ...
0
votes
0answers
7 views

first and second order factors

I am not deep into statistics yet, however ,I am reading an article that speaks about measurement scale. It says that some items (A,B,C) are first-order factor, but another item (D) is second-order ...
2
votes
1answer
13 views

scale creation - how to know if concept B is part of concept A or seperate concept

I have to create a survey that will measure customer attitude to home products. Imagine: - I have concept A (it couuld be consumer ethnocentrism, for example). I am going to measure it using 10 items ...
1
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0answers
12 views

Choosing between two scales

I am investigating a scale of consumer ethnocentrism - CETSCALE. I do not have much knowledge in econometrics, scales, etc., however: a) research papers report that the standard 17-item scale is ...
1
vote
0answers
11 views

How to combine data from different papers to test a standard scale?

I am very new to statistics and econometrics, however, I have to investigate one scale that was used over 30 years. It measures customer ethnocentrism. I want to combine data from different studies ...
1
vote
0answers
4 views

scale of measurements in sign test and signed rank tesr

Can some one help me to understand the right scale of measurement to use in sign test as well as in signed rank test? I read a certain book it says nominal scale is used in sign test while ordinal ...
0
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0answers
31 views

Summated scales for factors (latent variables)

For summated scales: can I use all the variables that load on a factor or is it necessary to use only the variables with high loading (over 0.70, for example)?
0
votes
1answer
62 views

Eliminated items in Factor Analysis

I'd like to get your opinions on how to interpret items that had to be eliminated in factor analysis (FA). I've been researching consumer shopping motivations and ran a survey with 40 items, which ...
0
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0answers
27 views

Can one variable explain if another variable is preferred more than others?

I have a questionnaire consisting of 7 multi item scales. The first four multi item scale each represents if a respondent performs a giving role and the remaining 3 multi item scales each represent a ...
1
vote
1answer
14 views

Scale of variables and the consequences on the solution

Let us say I have data set of distinct $x_i$. A Gaussian is fitted to it with maximum likelihood, obtaining some $\mu$ and some $\sigma^2$. I will also obtain a likelihood $\mathcal{L}$. Now, I copy ...
2
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0answers
43 views

How to scale data in a log-lin regression

I am currently doing exam revision, and I am stuck on a question in one of the past exams. It asks us to data scale the following equation: $\ln W$ = 2.54 + 0.4...
1
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1answer
117 views

Questionnaire design - Agree/Disagree scale

I recently constructed a questionnaire to carry out a market survey on soap brands used. One of the questions which was asked was to rate few statements which influence the respondent to buy a certain ...
0
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0answers
13 views

How to analyze a variable measured on a Likert scale and its interaction with another variable? [duplicate]

I have to analyze this variable which consists of scores given to 3 items (1-9 scale). This "Likert scale" measures "brand commitment" if thats important. 1) Firstly, should I compute 1 new variable ...
1
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0answers
28 views

Transforming Rank-Ordered Variable

I am currently working on an archival dataset (General Social Survey 1985). In a measure, participants are asked to rank 5 job characteristics by degree of preference. In other words, participants ...
1
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0answers
365 views

Transforming scores between different rating scales – Importance of response options

I'm working on a meta analysis of the mean of a single variable (using arithmetic mean as the effect size, rather than the relationship between two variables). The attitude I'm assessing has been ...
1
vote
0answers
15 views

Scale of control variable in ANCOVA

I am new to the field of ANCOVAs. I want to check if two groups differ in three quantitative variables. At the same time I would like to control for gender and diagnose (6 categories). Is it ...
1
vote
0answers
32 views

Regression analysis of different ranges in percent?

I have two variables, both percentages but have been converted to decimal numbers, and one variable ranges from roughly 15-30 percent and the other ranges from 55-70 percent. The lower range is my ...
12
votes
2answers
349 views

What criteria must be met in order to conclude a 'ceiling effect' is occurring?

According to The SAGE Encyclopedia of Social Science Research Methods… [a] ceiling effect occurs when a measure possesses a distinct upper limit for potential responses and a large concentration ...
2
votes
1answer
49 views

Log-scaled chart for visualizing extreme range

I need a simple bar chart or the like. I am not a statistician by any means, but this chart is supposed to accurately represent FileIO in MB/s compared to the theoretical peak of a specific drive. ...
1
vote
1answer
39 views

composite scale to measure child-parent relationship

For my research on Mental health problems and correlates, child-parent relationship have identified as a correlate. Child-parent relationship is planned to measure with 6 questions and each question ...
2
votes
1answer
388 views

Calculating scale mean from item means

I'm working on a review paper and need to collect the means and standard deviations of a given measure (such as a measure of depression) from papers of interest. However, some authors report means and ...
1
vote
1answer
154 views

How to calculate max/min scales on a scatter plot

I have 3 log scatter plots that I want to establish smooth maximum and minimum lines. What is the usual mathematical method to do that? (Image and Excel file links below.) The black lines on the ...
2
votes
1answer
156 views

How to solve the problem, that the scale of variables influence the gradient/optimization

I've the problem that, using something related to Fisher-scoring, the gradient, which is usually the sum over a variable times a value which depends upon the parameter we are looking for, the updates ...
3
votes
1answer
81 views

How to scale new observations for making predictions when the model was fitted with scaled data?

I understand the concept of scaling the data matrix to use in a linear regression model. For example, in R you could use: ...
0
votes
0answers
43 views

Question on scaling data

I have been reading Elements of Statistical Learning. And I saw some example R codes written online. I realise that very often the explanatory variables $X$ (the data of the predictors) are ...
0
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0answers
37 views

What is the level of measurement for years?

The years I won the gold medal in Olympics 1990/1991 1995/1996 1998/1999 I understand that quantitative data can be used on numeric scale. Perhaps, this can. Also I believe this is a ratio data ...
0
votes
2answers
89 views

Basic information about partial correlation

I'm quite new to this topic, so this is probably very basic for most of you: I want to analyse the relationship of multiple variables via partial correlation as an alternative for a regression ...
1
vote
1answer
89 views

How to rank criteria based on survey response?

I have made a survey to weight the importance of different features of a credit card using a 5 point Likert scale with scores (very important = 5...neither important or unimportant = 1). I have 8 ...
1
vote
1answer
182 views

Comparing correlations of variables with different scales

Probably a stupid question, but: I have a couple of variables with different scales - I don't want to use contingency tables so Is there a way to calculate all the correlations with different methods ...
4
votes
4answers
482 views

If a measure is valid (but not necesarily reliable), can it be consistently replicated?

I had this question on an exam, and I was positive that the answer was A. The Beck Depression Inventory is a scale intended to measure depression levels, with higher scores indicative of higher ...
0
votes
0answers
20 views

Using BTL2 : Can we fix the scale of the ability-scores?

Using the Bradley Terry Luce 2 model: We want to rank 41 scripts by paired-comparison (package BTL2). But our dataset is incomplete. We can generate ability scores, but the scores at the end of the ...
1
vote
0answers
130 views

Different Likert scales used in statistical anlysis [duplicate]

I am using different Likert Scales in questionnaire. Three dependent variables have Likert scales of 4 points, 2 points and 2 points. Three independent variables have 3 points scales. One moderating ...
5
votes
1answer
355 views

Advice/literature on combining items with different response scales into composite scales?

Let's say I have some self-report items measured on a 5-point Likert scale (Strongly Disagree to Strongly Agree) and other items measured on a 4-point Likert scale (Never, Rarely, Sometimes, Often). ...
1
vote
0answers
162 views

How to calculate ratings/rankings from Paired comparison / Pairwise comparison of large data-sets?

As part of my graduate thesis (area: psychology) I have gathered preference data. The data includes approximately 50000 heads-up comparison between elementX and elementX. I have a total of 15 ...
1
vote
1answer
110 views

Why multiplication and division are not allowed when using the interval scale?

This is what I already know: There is no true zero value on interval scales like temperature. The zero value doesn't state that temperature becomes unavailable at that point. Zero is just a human ...
3
votes
1answer
119 views

Validation of a questionnaire in a new population

I have 400 responses to a 20 item questionnaire which purports to measure an attitudinal constuct in medical students. The instrument was validated in the US for a single year of medical students and ...
2
votes
1answer
245 views

CFA Fit Measure Thresholds for New Scales

A well established questionnaire measuring interpersonal relations is modified to measure interorganizational relations. 11 parameters of the relation are determined by 4 items each. Items are removed ...
0
votes
1answer
143 views

Calculating total score for a scale including polytomous and dichotomous items [duplicate]

I have a variable that is measured using a 13-item, 4-point Likert scale with the exception of one item (yes $=1$, no $=2)$. How can I calculate the total score for this variable?
2
votes
0answers
57 views

Is there any “standards” for minimum variance of likert-type measured variables?

I want to develop a questionnaire. Because the target population are children, I used 3-point likert-type scale (0 1 2) for my items. Now I want to remove invariant items (i.e. the items not having ...
-1
votes
2answers
2k views

What is the difference among Indicator, Index, Variable and Measure?

What is exactly the difference among Indicator, Index, Variable and Measure? I would appreciate some reference.