Term and preterm neonates were assessed at the newborn (NB) period (term, term equivalent) and at 2, 4, 6, and 9 months in a study of the psychometric properties of the Social/Communication/Cognition (SCG) domain of PediaTrac™ v3.0, a novel caregiver-based developmental monitoring instrument. Item response theory (IRT) was used to model item parameters and estimate theta, an index of the latent trait, social/communication/cognition. Exploratory factor analysis (EFA) was conducted to further clarify the dimensionality of the domain. In a cohort of 571 caregiver-infant dyads (331 term, 240 preterm), mean theta values could be reliably estimated at all time periods, with term infants demonstrating significantly more advanced social/communication/cognition abilities at 9 months of age. Item discrimination and item difficulty of the 15, 15, 35, 47, and 57 items at the NB, 2-, 4-, 6-, and 9-month periods, respectively, could be reliably modeled across the range of ability. Total Information for the SCG domain was high and the reliability ranged from 0.97 to 0.99 (NB = .98, 2 month = .97, 4 month = .98, 6 month = .99 and 9 month = .99). EFA revealed second-order factors at each time period, with two factors at the NB period (affect/emotional expression, social responsiveness) accounting for 43% of variance; three factors at 2, 4, and 6 months (affect/emotional expression, social responsiveness imitation/emerging communication), accounting for 43%, 34%, and 34% of the variance, respectively; and four factors at 9 months (imitation/communication, nonverbal/gestural communication, affect expression, and social responsiveness), accounting for 34% of the variance. (PsycInfo Database Record (c) 2023 APA, all rights reserved).

中文翻译：

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护理人员报告的足月儿和早产儿从出生到九个月大的发育情况：PediaTracTM 社交/沟通/认知领域的心理测量。

PediaTrac 的社交/沟通/认知 (SCG) 领域的心理测量特性研究中，对足月和早产新生儿在新生儿 (NB) 期（足月、足月等效）以及 2、4、6 和 9 个月时进行了评估™ v3.0，一种新型的基于护理人员的发育监测仪器。项目反应理论（IRT）用于对项目参数进行建模并估计 theta，即潜在特质、社交/沟通/认知的指数。进行探索性因素分析（EFA）以进一步阐明域的维度。在 571 名看护者-婴儿二人组（331 名足月儿，240 名早产儿）组成的队列中，可以可靠地估计所有时间段的平均 θ 值，足月儿在 9 个月大时表现出明显更先进的社交/沟通/认知能力。15、15、35、47的项目区​​分度和项目难度 NB、2、4、6 和 9 个月期间的 57 个项目分别可以在整个能力范围内可靠地建模。SCG 域的总信息很高，可靠性范围为 0.97 至 0.99（NB = .98、2 个月 = .97、4 个月 = .98、6 个月 = .99 和 9 个月 = .99）。EFA揭示了每个时间段的二阶因素，其中NB时期的两个因素（情感/情绪表达、社交反应）占方差的43%；2、4 和 6 个月时的三个因素（情感/情绪表达、社交反应模仿/新兴沟通）分别占方差的 43%、34% 和 34%；9 个月时的四个因素（模仿/交流、非语言/手势交流、情感表达和社交反应），占方差的 34%。