I: Introduction by Floccia, C, Sambrook, T, Delle Luche, C, Kwok, R, Goslin, J, White, L, Cattani, A, Sullivan, E, Abbot-Smith, K, Krott, A, Mills, D, Rowland, C, Gervain, J, Plunkett, K

V: General discussion by Floccia, C, Sambrook, T, Delle Luche, C, Kwok, R, Goslin, J, White, L, Cattani, A, Sullivan, E, Abbot-Smith, K, Krott, A, Mills, D, Rowland, C, Gervain, J, Plunkett, K

IV: Results for studies 2 and 3: The UKBTAT model and its application to nontarget additional language learners by Floccia, C, Sambrook, T, Delle Luche, C, Kwok, R, Goslin, J, White, L, Cattani, A, Sullivan, E, Abbot-Smith, K, Krott, A, Mills, D, Rowland, C, Gervain, J, Plunkett, K

II: Methods by Floccia, C, Sambrook, T, Delle Luche, C, Kwok, R, Goslin, J, White, L, Cattani, A, Sullivan, E, Abbot-Smith, K, Krott, A, Mills, D, Rowland, C, Gervain, J, Plunkett, K

III: Analyses and results for study 1: Estimating the effect of linguistic distance on vocabulary development by Floccia, C, Sambrook, T, Delle Luche, C, Kwok, R, Goslin, J, White, L, Cattani, A, Sullivan, E, Abbot-Smith, K, Krott, A, Mills, D, Rowland, C, Gervain, J, Plunkett, K

Vocabulary of 2-year-olds learning English and an additional language: norms and effects of linguistic distance by Floccia, C, Sambrook, T, Delle Luche, C, Kwok, R, Goslin, J, White, L, Cattani, A, Sullivan, E, Abbot-Smith, K, Krott, A, Mills, D, Rowland, C, Gervain, J, Plunkett, K