Approximately 10% of children with a speech sound disorder present with an inconsistent phonological disorder, characterized by inconsistent production of words across multiple trials. A number of studies have provided evidence of the efficacy of core vocabulary therapy for the remediation of this speech sound disorder with a dosage of two speech-language therapy sessions per week. The present study aimed to investigate if two variations of core vocabulary therapy under real world conditions were effective in improving consistency in the speech of children with inconsistent phonological disorder. Variation A was based on standard administration of core vocabulary therapy (with the addition of a third session per week) and Variation B involved one therapy session per week with a speech-language therapist and an imitation based home program delivered by caregivers. This effectiveness study involved five participants (four males, one female) with inconsistent phonological disorder. The ages of the participants ranged from 39 to 59 months at baseline. One child participated in Variation A and four children participated in Variation B. Changes in consistency of speech between baseline and post-therapy were analysed using the Wilcoxon signed-rank test. Consistency of speech improved significantly between and pre- and post-test assessment for four out of five participants treated with either variation A or B. These results suggest that core vocabulary therapy delivered once per week with a speech language therapist and using imitation home practice may be an alternative therapy option for children with inconsistent phonological disorder, with implications for the cost and time required. These findings also challenge our theoretical understanding of the locus of impairment in inconsistent phonological disorder. Given the small number of participants in the study, there is a need for replication of these research findings using a larger number of participants.

中文翻译：

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用于治疗不一致语音障碍的核心词汇疗法：服务提供的变化

大约 10% 的语音障碍儿童表现为不一致的语音障碍，其特征是在多次试验中产生的单词不一致。许多研究提供了核心词汇疗法对治疗这种言语障碍的有效性的证据，每周两次言语语言疗法的剂量。本研究旨在调查现实世界条件下核心词汇治疗的两种变化是否能有效提高不一致语音障碍儿童的言语一致性。变体 A 基于核心词汇治疗的标准管理（每周增加第三次治疗），变体 B 包括每周一次由语言治疗师进行的治疗，以及由护理人员提供的基于模仿的家庭计划。这项有效性研究涉及五名患有不一致语音障碍的参与者（四名男性，一名女性）。参与者的年龄在基线时从 39 到 59 个月不等。一个孩子参加了变化 A，四个孩子参加了变化 B。使用 Wilcoxon 符号秩检验分析了基线和治疗后言语一致性的变化。对于接受变体 A 或变体 B 治疗的五分之四的参与者，在测试前后评估之间，言语的一致性显着提高。这些结果表明，每周一次由语言治疗师进行的核心词汇治疗和使用模仿家庭练习可能是不一致语音障碍儿童的替代治疗选择，这会影响所需的成本和时间。这些发现也挑战了我们对不一致语音障碍中损伤位置的理论理解。鉴于该研究的参与者人数较少，因此需要使用更多参与者来复制这些研究结果。这些发现也挑战了我们对不一致语音障碍中损伤位置的理论理解。鉴于该研究的参与者人数较少，因此需要使用更多参与者来复制这些研究结果。这些发现也挑战了我们对不一致语音障碍中损伤位置的理论理解。鉴于该研究的参与者人数较少，因此需要使用更多参与者来复制这些研究结果。