Summary Case 3 Sleeping - Data Analysis Psychology

CASE 3: SLEEPING




Eline Meuleman

,Dependent variable: sleep problems
- Var: isi1 to isi7

Independent variable 1: alcohol consumption
- Determined with alcfreq and alcint

Independent variable 2: working memory problems
- Var: LETTER 1 to LETTER 10

Exercise 1a
Way 1:
Compute new_score = (x + y + z)/3. Execute.




Way 2
Compute new_score = mean (x, y, z). Execute.




The difference is that with sleeppr_wrong (the first) no average is given when
one variable (isi1 tm isi7) is not filled in. By using "mean" you do get an average.

Exercise 1b
Needed: LETTER1 t/m LETTER10 (in dutch: BRIEF1 t/m BRIEF10)

, Exercise 1c
Analyze  Descriptive statistics  Descriptives
- Variables: slaappr_good and wm