6
votes
1answer
61 views

What paper discussed the cognitive properties of Likert/visual analogue scales in ratings?

I seem to recall a recent paper investigating whether ratings created using Likert or Visual Analogue Scales formats had the cognitive properties of interval or ratio data (since they are generally ...
8
votes
2answers
507 views

When is it defendable to use manifest instead of latent variables in psychological research?

In psychology, most of the concepts, theories, ideas etc. of interest refer to latent variables, where a latent variable is one that can't be observed directly. Instead, one has to find a manifest ...
6
votes
1answer
139 views

Do we need a pre-test to compare the effectiveness of two treatments?

Assume, I want to evaluate how effective two teachers are in teaching English to German children. Both teachers have been teaching at the same high school for twenty years, and both use a distinctly ...
3
votes
1answer
72 views

Are cortisol measures more reliable than self-reported fear measures for looking at difference scores?

I was sent an email by a researcher with the following question: You wrote that difference scores are okay to use if measurement error is minimised. Does that imply that biological ...
7
votes
2answers
254 views

Best practice to handle double negatives when using the expectancy-value model?

My question is regarding the multiplicative combination rule in the Expectancy-value model developed by Fishbein and Ajzen, and the issues regarding the expectancy value-muddle, or the case of "double ...
5
votes
1answer
81 views

Are there any standard psychometric scales that are only applicable to within-subject designs?

A while ago, I asked the question whether Presence questionnaires are valid in between-subject designs (see the question for the background to this assumption). While the question garnered some ...