Abstract: “This study will examine the validity and prevalence of specific language tasks to differentiate 108 second language (L2) learners, considering two main factors: the socioeconomic background and the instruction in first language (L1). All the tasks were developed for the first levels of proficiency (A2-B1, according to European benchmarks), and applied to a large sample of diverse Portuguese students (immigrants with origin in several continents). Four tasks administered are incorporated in a 15-test diagnostic. The tasks were administered between 2013 and 2014, in Lisbon schools, and were disposed on paper and on a computer screen one at a time. Data will be presented regarding the following items: verbal analogies, recall task, and cognates. Hypothesis 1: home environment has impact for tasks performance in L2, attending to employment situation and families’ economic stability identified through the professional situation of two-parent families and attending to their job skills (gradu”

Keywords: socioeconomic, factors, instruction, second, language, european,schools, evaluation