In accordance with the Self-Determination Theory, the interpersonal behavior of others can support or thwart the basic psychological needs and influence the well-being of students. Furthermore, several studies have shown that problematic internet use has a negative influence on the academic field. However, no studies have investigated the impact of need-supportive and need-thwarting interpersonal behaviors (using the SDT theoretical framework) on internet addiction, academic engagement, and academic achievement. For this reason, the main purpose of this study is to investigate the relationship between students’ perceptions of others’ behaviors that supported or thwarted their basic psychological needs, internet addiction, and academic engagement and the impact on academic achievement through two studies. In the first study, 889 students (age: M = 20.26, SD = 3.16), were used to investigate the dimensionality of the Italian version of the Interpersonal Behaviour Questionnaire (IBQ) and the reliability, convergent and concurrent validity. In the second study, 515 students (age: M = 20.26, SD = 3.16) were tested to investigate the mediating role of problematic internet use on the relationship between students’ perceptions of others’ behaviors that supported or thwarted their basic psychological needs and academic engagement and the impact on academic achievement. The results of the first study suggested that the Italian version of the IBQ shows good psychometric characteristics in the Italian context. The results of the second study confirmed the mediating role of problematic internet use and academic engagement as mediators between students’ perceptions of need-thwarting interpersonal behaviors and academic achievement.

根据自决理论，他人的人际交往行为可以支持或挫败基本的心理需求并影响学生的幸福感。此外，一些研究表明，有问题的互联网使用对学术领域有负面影响。但是，尚无研究调查需要支持和需要挫败的人际行为（使用SDT理论框架）对网络成瘾，学习投入和学习成绩的影响。因此，本研究的主要目的是通过两项研究来调查学生对支持或挫败其基本心理需求，网络成瘾和学术投入的他人行为的看法之间的关系。在第一项研究中，有889名学生（年龄：M = 20.26，SD = 3.16）被用来调查意大利版的人际行为问卷（IBQ）的维度以及信度，收敛性和并发有效性。在第二项研究中，对515名学生（年龄：M = 20.26，SD = 3.16）进行了测试，以调查有问题的互联网使用对学生对支持或挫败其基本心理需求的他人行为的看法与学术之间的中介作用。参与度及其对学业成绩的影响。第一项研究的结果表明，意大利语版本的IBQ在意大利语环境下显示出良好的心理计量学特征。