A thorough understanding of how ICT support provided by teacher preparation programmes influences preservice teachers' technological pedagogical content knowledge (TPACK) has become increasingly essential. This study aimed at exploring the mediating role of ICT perception, perceived ICT competence and ICT self-efficacy between university ICT support and preservice teachers' TPACK. Data were collected through an online self-assessment questionnaire translated and adapted from existing studies and verified with confirmatory factor analysis (CFA). A total of 298 preservice teachers, who were senior students studying at three different normal universities in China, participated in this study. Structural equation modelling revealed the following: (a) university ICT support significantly predicted preservice teachers' ICT perception, perceived ICT competence and ICT self-efficacy, but had no significant direct effects on their TPACK; (b) ICT self-efficacy was a strong predictor of preservice teachers' TPACK and ICT perception was a weak one, while perceived ICT competence did not predict TPACK at all; and (c) among three potential mediators, ICT self-efficacy mediated the most effects of university ICT support
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