This work presents the construction and conveyance of validity evidence of an emotional instability measurement instrument to be used in the public safety sector. For this purpose, two studies were performed with subjected public safety professionals of the State of Rio de Janeiro. The first study presented valid evidence based on content. In the second study, the analysis of the internal structure appointed the existence of one factor and four facets, respectively named emotional instability, depression, anxiety, emotional control and irritability. The consistency analysis, using the Cronbach's alpha coefficient, has shown evidence of good accuracy rates. The convergence evaluation, performed with the EFN (Factorial Neuroticism Scale), has allowed observation of strong correlations between the general factors of both scales. Such information provides valid evidence for the new scale, and opens new research paths which focus on psychological interface with public safety.
Emotional instability; Psychological evaluation; Big five factors; Test construction
