If you used Qualtrics for an online experiment, chances are that you have separate variables in SPSS for each condition of the experiment. Every respondent that was in condition one will score “1” on the variable (e.g.) “CON1″ and will be missing in (e.g.) “CON2″ and “CON3″. Likewise, every respondent that was in condition two […]
How do I create a scale in SPSS when I have items that are formulated in the opposite direction? 8 April 2015
Often, you won’t be interested in the questions you ask participants as such, but you are interested in the latent construct that is indicated by a number of variables. In this case you will want to create a scale variable, constructed from your items. To do this you will take the average score of the […]
How do I create a scale in SPSS? 8 April 2015
Often, you won’t be interested in the questions you ask participants as such, but you are interested in the latent construct that is indicated by a number of variables. In this case you will want to create a scale variable, constructed from your items. To do this you will take the average score of the […]
Which measure of association do I use? 30 March 2015
In order to choose a measure of association, you take into account the (a)symmetry of the association and the level of measurement. You can use this table to determine which measure of association is appropriate for your variables and association. When you do not know if there is a causal relationship between your two variables, […]
Which significance test do I use? 30 March 2015
There is a table available in Dutch which can help you choose your significance test in the digital workbook of Inferential Statistics, under ‘keuze toets’: http://www.mco.edu.fmg.uva.nl/is/werkboek.htm
Krippendorff’s Alpha is calculated during the development of the codebook and in the analysis-phase. It is important to get your inter coder reliability in order before you start coding your sample. There are two things that can cause Krippendorff’s Alpha (KALPHA) to be low. The first, and most important reason is when there is a […]
How do I calculate Krippendorff’s Alpha? 30 March 2015
There is a manual available on the website of the Amsterdam Content Analysis Lab, written by dr. Knut de Swert. This manual explains step by step how to perform a reliability analysis with Krippendorff’s Alpha in SPSS. You can find the manual here: http://www.polcomm.org/amsterdam-content-analysis-lab/manuals/ First, though, you need to restructure your data in SPSS. You […]
A conceptual model is a representation of your hypotheses and the domain of your research. It specifies the units of analysis, the time and geographical location of your population the variables (concepts that vary), and the effects or correlations between the variables. The most common error in conceptual models is the difference between a mediator […]