Measurement in intensive longitudinal data

In ecological momentary assessment, participants complete brief questionnaires about their behaviour and experiences multiple times per day over several days, yielding intensive longitudinal data. This high-frequency measurement allows researchers to capture human dynamics as they unfold in real-life contexts. At the same time, this increases respondent burden, and participants may disengage, respond carelessly, or stop responding altogether, threatening data quality and quantity. This research area focuses on careless responding as one such challenge and aims to: a) develop methods to detect and monitor it, giving researchers tools to assess the quality of their intensive longitudinal data; b) provide methods to account for reduced data quality when addressing substantive research questions with intensive longitudinal data; and c) investigate how respondent behaviour is shaped by study design and contextual factors, ultimately supporting the design of studies that yield higher-quality data.