These files contain the code and data to evaluate the impact of an agreeing response style (ARS) on the assessment of the psychometric properties of unidimensional and multidimensional scales using exploratory factor analysis (EFA). Specifically, through a simulation study we assessed (a) the selected number of factors, and the recovery of factor loadings and correlations when ARS was (b) taken into count (i.e., extracted), and (c) ignored (i.e., not extracted)