Hi There
I made a research with the IAT and I used the ready SPSS Syntax from Inquisit to calculate the D-Score - which worked fine...
At the end of the Syntax file there is an option to reverse the scoring of the IAT - what is this needed for? i couldnt find any information about it? do i have to do this or can i stop with the first step of the Syntax?
Thanks for any help!!
Beste regards
Sabi
************************************************************
** TO REVERSE THE SCORING OF THE IAT, REMOVE THE ASTERISKS **
** FROM THE NEXT FOUR COMMAND LINES. **
************************************************************* .
* COMPUTE D_biep = 0 - D_biep .
* COMPUTE D_biep_a = 0 - D_biep_a .
* COMPUTE D_biep_b = 0 - D_biep_b .
* VARIABLE LABELS
D_biep 'd score all blocks'
/ D_biep_a 'd score 1st blocks'
/ D_biep_b 'd score 2nd blocks' .
FORMAT D_biep D_BIEP_a D_BIEP_b D_BIEP (F6.3) SUBJECT (F7.0)
Na Nb (F4.0) M1a M2a M1b M2b (F7.1)
ERR1a ERR2a ERR1b ERR2b ERR_1 ERR_2 (F5.1) .
SAVE OUTFILE = 'D_BIEP_temp.SAV' .
DESCRIPTIVES ALL .
**************************************************************.
**** STEP 3: COMBINE MEASURES AND SAVE ****.
**************************************************************.
*Add labels to CRITERIA.SAV .
GET FILE = 'CRITERIA.SAV' .
VARIABLE LABELS
PCT_300 '% latencies below 300 ms'
/ PCT_400 '% latencies below 400 ms'
/ PCT_10K '% latencies above 10,000 ms'
/ AVELTNCY 'Overall average latency (ms)'
/ ERRORPCT 'Overall % errors'
/ NTRIALS 'Total # of combined-task trials' .
FORMAT AVELTNCY (F7.1) PCT_300 PCT_400 PCT_10K ERRORPCT (F6.1) SUBJECT (F7.0) .
SAVE OUTFILE = 'CRITERIA.SAV' .
*Combine and save .
MATCH FILES FILE = 'D_BIEP_temp.SAV' / FILE = 'CRITERIA.SAV' /BY SUBJECT .
SAVE OUTFILE = 'D_BIEP.SAV' .
* Note: No subjects have yet been discarded. However, each record contains .
* three variables that might be used for discard .
* PCT_300 = overall % of responses with latencies below 300 ms .
* ERRORPCT = overall error % .
* AVELTNCY = overall average latency .
* [Note that 'aveltncy' was computed _BEFORE_ discard of latencies above 10000 ms] .
GET FILE = 'D_BIEP.SAV' .
DESCRIPTIVES ALL .