Syntax cross sectioneel onderzoek effect van hooggedoseerde MDMA/XTC

* Encoding: UTF-8.
*Deelnemers missing data

FREQUENCIES VARIABLES=strngXTC_attDesirable_memory
/FORMAT=NOTABLE
/ORDER=ANALYSIS.

*Missing data uitfilteren

SELECT IF (not missing(strngXTC_AttDesirable_memory)).

*Despcriptives age en usedXtc

DESCRIPTIVES VARIABLES=age usedXtc
/STATISTICS=MEAN STDDEV MIN MAX.

*Descriptives gender

MEANS TABLES=id BY gender
/CELLS=MEAN COUNT STDDEV.

*Item-analyse voor vragen naar algemene intentie

reliability
/VARIABLES =
strngXTC_IntentionRAA_intention,
strngXTC_IntentionRAA_want,
strngXTC_IntentionRAA_expectation
/MODEL ALPHA
/STATISTICS DESCRIPTIVE SCALE CORRELATIONS
/SUMMARY TOTAL.

*Item-analyse voor vragen naar algemene attitude

reliability
/VARIABLES =
strngXTC_AttGeneral_good,
strngXTC_AttGeneral_prettig,
strngXTC_AttGeneral_slim,
strngXTC_AttGeneral_gezond,
strngXTC_AttGeneral_spannend
/MODEL ALPHA
/STATISTICS DESCRIPTIVE SCALE CORRELATIONS
/SUMMARY TOTAL

*RECODING Beliefs van (-3 - 3) naar (1 - 7)

RECODE strngXTC_AttBeliefs_long
(-3=1) (-2=2) (-1=3) (0=4) (1=5) (2=6) (3=7)
INTO strngXTC_AttBeliefs_long_recoded.

RECODE strngXTC_AttBeliefs_intensity
(-3=1) (-2=2) (-1=3) (0=4) (1=5) (2=6) (3=7)
INTO strngXTC_AttBeliefs_intensity_recoded.

RECODE strngXTC_AttBeliefs_intoxicated
(-3=1) (-2=2) (-1=3) (0=4) (1=5) (2=6) (3=7)
INTO strngXTC_AttBeliefs_intoxicated_recoded.