Section I Second-language -- Putnam, Michael T., The role of formal features in an exo-skeletal grammar: Implications for language acquisition and maintenance -- Ahern, Aoife, José Amenós-Pons and Pedro Guijarro-Fuentes, Intepreting evidentiality in non-evidential languages: L2 Spanish by L1 French speakers -- Tuniyan, Elina and Roumyana Slabakova, L2 acquisition of definiteness in English: non-target mapping of anaphoricity onto the .. -- Diaubalick, Tim, Pedro Guijarro-Fuentes and Katrin Schmitz, Language influence in the acquisition of aspect: Advanced L2 learners versus heritage speakers -- Genevska-Hanke, Dobrinka, Pronominal use in late L1 attrition in near-native L2 acquisition: the case of pro-drop L1 Bulgarian and non-pro-drop L2 German -- Section II Language acquisition under specific conditions -- Wimmer, Eva, Bernadette Witecy and Martina Penke, Syntactic problems in German individuals with Down syndrome: evidence from the production of wh-questions -- Herbert, Marjorie and Acrisio Pires, Contact signing and English-based production among L1 and L2 deaf ASL-English bilinguals -- Müller, Natascha and Abira Sivakumar-Thiyagarajah, Acquiring three languages from birth: It does matter -- Section III First language -- Ito, Masuyo and Kenneth Wexler, Maximality trouble? Japanese-speaking children's interpretation of comparatives -- Agostinho, Celina and Anna Gavarró, The acquisition of implicit control in European Portuguese -- De Villiers, Jill, Jessica Kotfila, and Tom Roeper, When is recursion easier for children? -- Sicuro Correa, Letícia Maria, On the domain specificity of intervention effects in children's comprehension of relative clauses and coordinate clauses -- Bosch, Jasmijn, Shalom Zuckermann and Manuela Pinto, The acquisition of 'bridging' tested in a coloring task -- Roeper, Tom, Jennifer Rau, Dagmar Bittner, Nadine Balbach, Milena Kuehnast, Presuppositions, implicatures, and repair emerge slowly -- Smeets, Liz and Luisa Meroni, Stress or context for the computation of scalar implicatures.