Tagged Questions
3
votes
1answer
479 views
4 point and 5 point Likert scales in a new questionnaire
I'm looking to confirm whether having a 4 point Likert Scale for some constructs, and a 5 point Likert scale for other constructs will be suitable when developing a questionnaire?
I have 7 constructs ...
2
votes
1answer
240 views
Omega vs. alpha reliability
I wonder if someone can explain what is the main difference between omega and alpha reliabilities?
I understand an omega reliability is based on hierarchical factor model as shown in the following ...
3
votes
1answer
335 views
Designing and validating a Likert-type scale with odd or even response categories
As part of an advisory team in my educational institution for undergraduate nurses, I (among others) have been assigned to design a questionnaire that will assess students' and academic staff's ...
5
votes
3answers
889 views
Is 0 a valid value in a Likert scale?
I have carried out my pilot study on language learning motivation using a 6 point Likert scale but from 0 (strongly disagree) to 5 (very much agree). I noticed a colleague in his survey used 1 to 6. ...
2
votes
1answer
69 views
What is correct terminology when describing the number of response levels of a Likert scale?
I know that the Likert scale is the sum (or some sort of combination) of all the responses of a survey, test etc. and the actual numeric responses are called response levels. Is this true of all ...
5
votes
2answers
3k views
How to transform ordinal data from questionnaire into proper interval data?
Are there any straightforward methods of transforming ordinal level data into interval level (just as there are for doing it the other way round)? And performable in Excel or SPSS?
Having the data, ...
2
votes
0answers
207 views
Maximizing Cronbach alpha to select the number of variables that define a given construct
I can't seem to find this anywhere on the internet or in my books. I'm putting together a construct for an underlying variable.
Is it acceptable to have a construct with two variables if that ...
0
votes
3answers
673 views
What is the most effective way to combine different rating scales for the same data?
I have a collection of data which is inherently the same (would expect it to follow the same distribution) where some of it is rated with one scale of ordinal ratings and the rest of the data is rated ...
5
votes
2answers
479 views
Advice on scientifically sound scale construction
I've been given a set of 20 Likert-items (ranging from 1-5, sample size n = 299) within the field of organizational research. The items are intended to measure a latent concept which is ...
2
votes
1answer
205 views
Standard formula for quick calculation of scores
I have three datasets as follows:
Dataset A can have a maximum score of 30. (Individual scores can be from 1 to 30)
Dataset B can have a maximum score of 45. (Individual scores can be from 1 to 45)
...
3
votes
1answer
546 views
Which package to use for convergent and discriminant validity in R?
I am new to R and want to assess validity of some scales using R. Is there a package that I can use to test for convergent and discriminant validity in R?
1
vote
2answers
224 views
Rules of thumb for creating composite scales
Normally when I create an index I basically just take the or averages of the individual variables that comprise the index. But I'm wondering if one should / could not, take the product?
E.g., a scale ...
8
votes
2answers
1k views
Assessing reliability of a questionnaire: dimensionality, problematic items, and whether to use alpha, lambda6 or some other index?
I am analyzing scores given by participants attending an experiment. I want to estimate the reliability of my questionnaire which is composed of 6 items aimed at estimating the attitude of the ...
6
votes
4answers
5k views
How to compute correlation between/within groups of variables?
I have a matrix of 1000 observations and 50 variables each measured on a 5-point scale. These variables are organized into groups, but there aren't an equal number of variables in each group.
I'd ...
2
votes
0answers
1k views
How to carry out a Likert scale analysis?
Context:
My research aims to assess whether parents who have been involved in a relationship with a social worker are at higher risk of child abuse/neglect.
I am trying to establish whether there ...
2
votes
1answer
1k views
Internal reliability for an ordinal scale
My teacher is asking whether it is possible to look at the Cronbachs's alpha when looking at the internal reliability of an ordinal scale. She thinks, because you use the mean of it, it is not ...
6
votes
4answers
788 views
Can one validly reduce the numbers of items in a published Likert-scale?
[edits made in response to feedback- thanks :-) ]
Doh! More edits! Sorry!
Hello-
I am doing some rather rough and ready data collection with a survey sent out to healthcare staff using a published ...
7
votes
2answers
2k views
Validating questionnaires
I am designing a questionnaire for my dissertation. I am in the process of validating the questionnaire I have applied a Cronbach's alpha test to the initial sample group. The responses to the ...
5
votes
2answers
761 views
Item Analysis for an R newbie
I am trying to assess a 20-item multliple choice test. I want to perform an item analysis such as can be found in this example. So for each question I want the P-value and the correlation with the ...
6
votes
2answers
2k views
Factor analysis of questionnaires composed of Likert items
I used to analyse items from a psychometric point of view. But now I am trying to analyse other types of questions on motivation and other topics. These questions are all on Likert scales. My initial ...
