许多个人因素，比如早期的交际技巧，可以在解释后来的语言结果方面发挥作用。预测变量的检测对于早期识别需要干预的儿童至关重要。本研究的重点是性染色体三体（SCT）的儿童，遗传条件与发展语言延迟或损害的风险增加。目的是分析他们18个月大的交际能力，并确定他们后来的词汇量的重要预测因素。参与者是76名18个月大的儿童(38名患有SCT，和38名典型发育(TD)儿童)。他们的沟通技巧在亲子游戏期间进行了评估，父母在18和24个月时填写了一份关于他们词汇发展的报告。患有SCT的儿童在18个月时在言语前（胡言乱语和手势）和言语能力方面表现出明显较差的语言技能。患有SCT的幼儿中有很大比例（近70％）是24个月后说话的孩子，那些蹒跚学步的孩子在18个月时表现出较低的胡言乱语频率。早期的词汇技巧，儿童发育商，并且是SCT幼儿组的一部分是六个月后儿童词汇量的重要预测因子。在评估患有SCT的儿童的语言能力时，应考虑这些变量，以检测未来语言障碍的可能早期风险因素。
Many individual factors, such as early communicative skills, could play a role in explaining later linguistic outcomes. The detection of predictive variables is fundamental to identifying early the children who need intervention. The present study focuses on children with sex chromosome trisomies (SCTs), genetic conditions with an increased risk of developing language delays or impairments. The aims are to analyse their communicative skills at 18 months of age, and identify significant predictors of their later vocabulary size. Participants were 76 18-month-old children (38 with SCTs, and 38 typically-developing (TD) children). Their communicative skills were assessed during a parent-child play session, and parents filled in a report on their vocabulary development at 18 and 24 months. Children with SCTs showed significantly poorer linguistic skills at 18 months in both preverbal (babbling and gestures) and verbal abilities. A high percentage (nearly 70%) of toddlers with SCTs were late-talking children at 24 months, and those toddlers showed a lower frequency of babbling utterances at 18 months. Early lexical skills, children\'s developmental quotient, and being part of the group of toddlers with SCTs were significant predictors of children\'s vocabulary size six months later. These variables should be considered when assessing the linguistic competence of a child with SCTs to detect possible early risk factors of future language impairment.
