Applied quantitative analysis a practical introduction SOSM-405 (5 cr) Session 4 Tue 8-10, Period III, Jan-Feb 2018 Faculty of Social Sciences / University of Helsinki Teemu Kemppainen teemu.t.kemppainen@helsinki.fi https://teemunsivu.wordpress.com/applied-quantitative-analysis/
Contents Measurement Sum variables Exploratory factor analysis Hands-on: Compute Split Select cases EFA
Measurement Observing and recording the characteristics of study units with a structured procedure variables Height, weight, income, age, education level…pretty easy Attitudes, subjective experiences, well-being…more difficult, but possible Also classifying is ”measuring”…cf. text analysis and classification, counting… Good measurement is valid and reliable
A graphical intuition to measurement Reliability: repeatability, stability, consistency (alpha) Validity: measuring what we want to measure Babbie E. 2010: The Practice of Social Research. 12th ed. Wadsworth.
”Things”, items and aggregate measures E.g. sum variable, factor score variable Latent constructs, factors, dimensions…”things” Survey Items Why: content validity & reliability often better indicators than single items work nicely in regression Measurement error Vehkalahti K 2007: Monimuuttujamenetelmät. http://www.helsinki.fi/~kvehkala/mmm/moniste.pdf
Hands on Compute Split Select cases EFA