46 Under what conditions should Likert scales be used as ordinal or interval data? 2010-07-19T19:17:47.537

24 Visualizing Likert Item Response Data 2010-10-23T15:04:28.670

24 Normalization vs. scaling 2012-09-03T08:56:19.270

22 Group differences on a five point Likert item 2010-07-20T03:31:45.820

17 When should I apply feature scaling for my data 2014-10-29T09:00:48.203

16 Whether to use structural equation modelling to analyse observational studies in psychology 2011-05-26T03:20:04.987

15 Factor analysis of questionnaires composed of Likert items 2010-09-04T11:15:48.317

14 Assessing reliability of a questionnaire: dimensionality, problematic items, and whether to use alpha, lambda6 or some other index? 2011-06-06T12:32:07.103

13 How to compute correlation between/within groups of variables? 2011-04-24T03:41:44.080

13 What criteria must be met in order to conclude a 'ceiling effect' is occurring? 2014-05-07T08:30:12.273

12 Item Analysis for an R newbie 2010-10-23T11:19:34.040

12 Validating questionnaires 2010-11-05T13:34:50.963

12 Changing the scale of a variable to 0-100 2012-04-05T04:13:52.557

12 How to transform ordinal data from questionnaire into proper interval data? 2012-05-07T04:43:02.443

11 How to calculate Rousseeuw’s and Croux’ (1993) Qn scale estimator for large samples? 2010-10-26T09:34:08.073

11 Sum of rating scores vs estimated factor scores? 2016-01-18T18:32:32.347

10 Can one validly reduce the numbers of items in a published Likert-scale? 2010-11-10T12:32:49.143

9 Spearman's or Pearson's correlation with Likert scales where linearity and homoscedasticity may be violated 2011-03-30T09:28:01.670

9 What does Gaussian efficiency mean? 2011-05-06T08:33:03.437

9 How to scale new observations for making predictions when the model was fitted with scaled data? 2014-03-07T15:14:44.203

8 Weight a rating system to favor items rated highly by more people over items rated highly by fewer people? 2011-01-18T22:46:06.467

8 Based on factor loadings (in factor analysis) can we give unequal weights to Likert scale items? 2012-07-09T21:51:53.930

8 Is 0 a valid value in a Likert scale? 2012-07-16T15:13:21.480

7 How to test group differences on a five point variable? 2010-08-31T20:57:50.950

7 Dealing with missing data due to variable not being measured over initial period of a study 2010-09-30T04:52:04.513

7 Advice on scientifically sound scale construction 2012-01-15T16:39:00.600

7 Omega vs. alpha reliability 2012-10-11T09:07:37.523

7 How to calculate ratings/rankings from Paired comparison / Pairwise comparison of large data-sets? 2014-01-22T11:55:58.790

7 Alternative notions to that of proper scoring rules, and using scoring rules to evaluate models 2015-04-11T15:22:06.897

6 How to rank the results of questions with categorical answers? 2010-09-11T20:20:34.950

6 How to compare Likert scales with varying number of categories across time? 2011-02-01T23:36:42.177

6 Creating an index based on a set of measurements without a target for purpose of rank ordering 2011-06-02T21:30:14.260

6 Whether to use EFA or PCA to assess dimensionality of a set of Likert items 2011-06-08T12:57:46.427

6 Estimating ability using IRT when the model parameters are known 2012-08-11T07:09:45.507

5 Appropriateness of calculating scale means based on available non-missing responses (i.e., person-mean imputation) 2011-05-24T14:12:45.140

5 How to form a meaningful statistical indicator to reflect user interaction with a website 2011-07-27T09:35:46.880

5 Scaling data that are on different scales for a graph 2011-12-06T10:22:21.677

5 Ordinal regression vs. summated score 2013-01-06T22:01:14.660

5 How to choose the scaling matrix in ABC (without cheating!)? 2013-07-12T15:58:50.870

5 Which normalization method for different units (zero, negative, etc.) 2013-10-01T15:53:51.717

5 Whether to test items for normality (and transform) when performing confirmatory factor analysis on a set of scales? 2013-10-03T06:11:18.640

5 Advice/literature on combining items with different response scales into composite scales? 2014-01-22T23:20:29.290

5 Can binary data be ordinal? 2015-09-01T07:16:53.240

4 How to reduce number of items on a multi-item scale where each item requires ranking four response options 2010-07-29T01:45:55.080

4 Internal reliability for an ordinal scale 2010-11-18T20:40:16.053

4 Does a psychological scale need to be revalidated after reducing the number of response options from 9 to 4? 2011-02-26T19:28:19.357

4 General advice on forming an index of attitude to the environment from a set of Likert items 2011-05-06T01:11:14.787

4 Multiple imputation on single subscale item or subscale scores? 2011-07-10T14:44:06.160

4 Which package to use for convergent and discriminant validity in R? 2011-12-23T22:20:25.333

4 Probability density function (pdf) of normal sample variance ($S^2$) 2012-02-03T17:23:48.693

4 Factor scores vs. construct mean scores in regression analysis 2012-07-15T10:42:22.053

4 Designing and validating a Likert-type scale with odd or even response categories 2012-08-20T11:23:26.147

4 How to compare two related ordinal variables? 2012-08-30T17:01:32.180

4 Comparison of before and after ordinal data across two groups 2012-11-08T03:28:48.437

4 4 point and 5 point Likert scales in a new questionnaire 2013-03-07T11:35:28.193

4 What is the correct use of Cronbach's alpha? 2013-09-04T18:15:10.760

4 How to check psychometric type of scales? 2013-10-05T21:34:41.963

4 Validation of a questionnaire in a new population 2014-01-11T19:40:27.290

4 If a measure is valid (but not necesarily reliable), can it be consistently replicated? 2014-02-07T04:37:41.903

4 Why does the scaling of feature vectors improve performance of SVM classifier? 2014-10-06T23:13:40.443

4 Is there an alternate $\chi^2$ calculation useful for data spanning a large scale? 2015-05-28T00:05:41.580

4 How to interpret the fit of cfa (sem) outcome? 2016-01-02T11:02:43.907

3 How can I adjust classifier to the scale of the other 2010-09-27T16:53:52.353

3 How to carry out a Likert scale analysis? 2011-04-11T19:37:39.740

3 Is subjective weighting acceptable to create composites for correlation analysis? 2011-08-04T02:54:58.237

3 How do I derive principal components taking account of repeated measures? 2011-12-15T16:21:11.557

3 How to create index from correlated variables? 2012-04-17T18:11:10.490

3 Subscales (not items) as indicators of latent variables in SEM 2012-05-06T07:37:58.817

3 Is it plausible to get a Cronbach's alpha of .85 with only two Likert-type items? 2012-06-20T05:03:45.173

3 Can a dichotomous variable (yes/no) be merged with a Likert measure (1,2,3,4) using z scores? 2012-10-22T18:16:25.670

3 What do you call a measurement that's halfway between ordinal and interval? 2013-02-25T11:42:04.267

3 Validation of a scale for a different population (CFA) 2013-03-10T19:42:22.427

3 Summing up ordered items to a sum-score: implications? 2013-07-02T14:24:22.163

3 Should I run measurement invariance if confirmatory factor analysis is not affirmative? 2013-07-10T20:16:13.723

3 What factor loading is recommended to retaining items in a factor analysis? 2013-08-12T02:20:37.787

3 How to solve the problem, that the scale of variables influence the gradient/optimization 2014-03-21T17:46:25.393

3 Finding a scale matrix of multivariate Cauchy distribution given a border of credible region 2015-06-20T15:55:06.860

3 Rule of thumb for using logarithmic scale 2015-07-22T11:18:43.033

3 Non-Significant difference between individual items, but significant difference between overall scores 2015-10-18T14:35:10.893

3 RMSE is scale-dependent; is RMSE%? 2016-01-15T17:36:32.363

3 Scale a set of probabilities so their sum is a target value 2016-05-29T10:36:59.523

3 Scaling after Principal Component Analysis 2016-07-12T08:59:45.240

3 Is my data ordinal? 2016-07-31T11:11:23.307

3 Normality scale variables consisting of several ordinal variables 2017-01-16T20:02:13.703

3 Using Data on Different Spatial Scales for Econometrics? 2017-02-03T07:58:31.337

3 Scale of the correlation coefficient: is "r = .40 is twice as strong as r = .20" allowed/correct? 2017-03-08T10:08:29.213

3 Correlation between a continuous variable and a discrete quantitative, count variable 2017-09-30T09:54:57.383

3 When and How to Scale Numeric Interaction Variables in Machine Learning Model 2017-10-07T17:19:45.860

3 Scales correlate negatively, but average correlates positively! 2017-12-05T02:03:27.203

2 How can I compare Likert scale data of two clusters in SPSS? 2011-03-06T08:21:51.870

2 How to interpret VIF and Condition Index for the purpose of assessing reliability of formative measures? 2011-10-07T20:49:04.423

2 How to compute composite score of rank order variables? 2011-10-12T20:46:42.020

2 How to sequence z-score creation and log transformation in an experiment with multiple groups and conditions? 2011-10-13T15:28:05.803

2 Should the distribution of composite scores be normally distributed? 2011-11-05T20:17:14.113

2 Likert scale categories and composite scores 2011-12-31T23:49:31.140

2 Standard formula for quick calculation of scores 2012-01-01T08:44:36.417

2 How do I combine two outcome measures from two different questionnaires into one variable? 2012-01-09T02:01:21.637

2 How do I collect data for simple self-survey 2012-01-18T15:56:56.783

2 Maximizing Cronbach alpha to select the number of variables that define a given construct 2012-05-06T08:49:27.770