Analysis and Objective of the Questionnaire

The Brief Aggression Questionnaire (BAQ-12) is a self-report questionnaire proposed in 2014 by Webster and his colleagues. The BAQ-12 measures aggression in all its aspects and has as its main advantage the small number of items (12), which allows for a short completion time. The development of the questionnaire aimed to further investigate the detection of different forms of aggression and to contribute to their reduction.

Question Calibration

The questionnaire consists of 12 questions, each with 5 possible answers ranging from 1 (strongly agree) to 5 (strongly disagree). The BAQ-12 was translated from English into Greek by three bilingual translators and then completed by a randomly selected group of 130 hospital employees, 25 of whom completed it a second time two months later. The results showed that the mean BAQ-12 score for hospitalized patients was 39.97, significantly higher than that of the sample of 130 hospital employees.

Statistical Analysis

Statistical analysis was performed using IBM SPSS Statistics version 24 in order to carry out a descriptive statistical analysis of the correlations, internal reliability, and exploratory factor analysis. The AMOS 20 software was used to conduct the confirmatory factor analysis. The normality of the distribution of continuous variables was examined using the Kolmogorov-Smirnov test, and the evaluation of the scale’s functional capacity was derived from the Receiver Operating Characteristic (ROC) curve.

Validity and Reliability

The BAQ-12 Aggression Questionnaire has been proposed as a valid and reliable tool, with satisfactory convergent and concurrent validity, as well as good test-retest reliability (Webster et al., 2014). Studies indicate that the overall questionnaire demonstrated satisfactory internal reliability (Cronbach’s alpha = 0.797). More specifically, among the subscales, physical aggression showed the highest reliability (α = 0.79), while verbal aggression showed the lowest (α = 0.57).

Bibliography

Webster, G. D., DeWall, C. N., Pond Jr., R. S., et al. (2014). The Brief Aggression Questionnaire: Psychometric and Behavioral Evidence for an Efficient Measure of Trait Aggression. Aggressive Behavior, 40, 120–139.