Assertion: procrastination's cause | /r/HasProperty | de castella
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Source sentences:
text: Frequently, the fundamental cause of procrastination is attributed to the perception of task anxiety and the of failure based on self-doubt concerning one’s competency and abilities to complete a task effectively (De Castella, Byrne, & Covington, 2013; Ferrari & Tice, 2000; Pychyl, & Flett, 2012).