TY  - JOUR
PY  - 1999//
TI  - Instrumental and expressive representations of aggression: One scale or two?
JO  - Aggressive behavior
A1  - Campbell, Andrea
A1  - Muncer, Steven
A1  - McManus, IC
A1  - Woodhouse, D
SP  - 435
EP  - 444
VL  - 25
IS  - 6
N2  - The Expagg questionnaire was developed to measure a subject's view of their own aggression as a relatively instrumental or relatively expressive act. Two issues have been raised pertaining to the dimensional structure of the questionnaire: the use of principal components analysis on dichotomous responses and the possibility that instrumental and expressive representations might be independent dimensions rather than opposite ends of a single continuum. In study 1, dichotomous Expagg data from 405 subjects were subjected to microfact, principal components, and factor analysis. Each produced a first general factor, and the correlations between the item loadings were in excess of r = .99. In study 2, a 40-item Likert scale version of Expagg was given to 295 subjects. Principal components analysis, paired item correlations, and subscale correlations suggested partial independence of instrumental and expressive items. Two new 8-item scales measuring instrumental and expressive representations were constructed that maximise their independence. Potential. uses of these revised scales are discussed. <p />
LA  - en
SN  - 0096-140X
UR  - http://dx.doi.org/
ID  - ref1
ER  -