Objetivos: El objetivo del estudio consistió en el diseño y realización de análisis psicométricos preliminares de un instrumento para evaluar conductas constructivas y destructivas on-line. Participantes: Participaron voluntariamente 351 sujetos (156 hombres, 191 mujeres, 2 se identificaron como no binarios) que tenían en promedio 39.35 años (DE = 13.8). La mayoría residía en Buenos Aires (n = 297; 84.6%). Materiales: Big Five Inventory, Personality Inventory for DSM-5 Brief-Form, Positive Traits Inventory Short-Form, Dark Triad Scale y el instrumento diseñado en este estudio. Resultados: Para el diseño de los ítems se consideraron algunos de la escala desarrollada por Grothe et al. (2016) y otros sugeridos por usuarios asiduos de redes sociales e internet. El instrumento fue sometido a un estudio piloto de 30 sujetos. Posteriormente, se realizó un análisis factorial exploratorio que arrojó una estructura de dos factores orientados a la evaluación de los dos tipos de conductas, que explicaban el 57.5 % de la varianza total. Se eliminaron 7 ítems, dando lugar a una escala de 18 ítems. Adicionalmente se estimó la consistencia interna mediante el cálculo de omega dando superior a .75 para ambas dimensiones. Se aspira a recolectar una segunda muestra para poder confirmar la estructura factorial. Palabras clave Conductas destructivas - Conductas constructivas - Internet - Instrumento ABSTRACT DESIGN AND PRELIMINARY PSYCHOMETRIC ANALYSIS OF AN INSTRUMENT TO ASSESS CONSTRUCTIVE AND DESTRUCTIVE ONLINE BEHAVIORS Objective: The objective of the study was to design and conduct preliminary psychometric analysis of an instrument to assess constructive and destructive online behaviors. Participants: 351 subjects (156 men, 191 women, 2 identified as non-binary) who were on average 39.35 years old (SD = 13.8), who participated voluntarily. The majority resided in Buenos Aires (n = 297; 84.6%). Materials: Big Five Inventory, Personality Inventory for DSM-5 Brief-Form, Positive Traits Inventory Short-Form, Dark Triad Scale, and the instrument designed in this study. Results: For the design of the items, some items belonging to the scale developed by Grothe et al. (2016) and others suggested by regular users of social networks and the Internet were taken into consideration. The instrument underwent a pilot study with 30 participants. Subsequently, an exploratory factorial analysis was carried out, yielding a structure of two factors oriented towards the evaluation of the two types of behaviors, which explained the 57.5% of total variance. 7 items were eliminated, leading to a scale of 18 items. Additionally, internal consistency was estimated using omega, with a result greater than .75 for both dimensions. It is hoped to collect a second sample in order to confirm the factorial structure. Keywords Destructive behaviors - Constructive behaviors - Internet - Ins-