The study adopts a naturalistic perspective, looking at the relationship between socio-economic status (SES), activities and variation sets in child-directed speech (CDS) to Spanish-speaking Argentinian toddlers. It aims to determine the effect of SES and type of activity on the proportion of words and utterances in variation sets and on the pragmatic function they serve in interaction. Thirty two children (mean: 14.3 months) and their families were audio-recorded for four hours and the middle two hours were analyzed using CLAN. We developed an automatic algorithm for variation sets extraction that compares noun, verb and adjective lexemes in successive utterances. Mixed-effects beta regression showed SES and activity type effects on the proportion of variation sets and on the pragmatic function served by variation sets. Findings revealed that the contextual variables considered impact on how interlocutors organize the information to young children at the local level of natural at home interactions.

该研究采用自然主义视角，着眼于讲西班牙语的阿根廷幼儿的社会经济地位 (SES)、活动和面向儿童的语音 (CDS) 的变化集之间的关系。它旨在确定 SES 和活动类型对变体集中单词和话语的比例以及它们在交互中的语用功能的影响。对 32 名儿童（平均：14.3 个月）及其家人进行了 4 小时的录音，中间的 2 小时使用 CLAN 进行了分析。我们开发了一种用于变体集提取的自动算法，该算法比较连续话语中的名词、动词和形容词词位。混合效应 beta 回归显示 SES 和活动类型对变体集的比例和变体集所服务的语用功能有影响。