<![CDATA[Hoarding behavior in Generation Z is characterized by difficulty discarding possessions, an urge to continuously acquire items, and the accumulation of clutter that disrupts the function of living spaces. This behavior has the potential to cause emotional, cognitive, and living-space functional disturbances in individuals. This study aims to develop and test the psychometric properties of a hoarding behavior instrument for Generation Z in Indonesia. The instrument consists of 35 items measuring three main dimensions: excessive acquisition, difficulty discarding, and clutter, using a 1-5 Likert scale. Validity was tested through expert judgment with 102 respondents, yielding a Cronbach's Alpha of 0.933, so that all items could proceed to subsequent testing with the same items. The next construct validity test on 170 respondents produced Confirmatory Factor Analysis (CFA) results: the excessive acquisition dimension showed χ² = 118 (df = 64, p-value < .001), SRMR = 0.0573, and RMSEA = 0.070; the difficulty discarding dimension showed χ² = 128 (df = 43, p-value < .001), SRMR = 0.0493, and RMSEA = 0.108; and the clutter dimension showed χ² = 128 (df = 43, p-value < .001), SRMR = 0.0493, and RMSEA = 0.108. These findings indicate that the developed hoarding behavior instrument has good validity and reliability, making it suitable for measuring hoarding behavior for Generation Z in Indonesia and serving as a reference for researchers and psychologists in the assessment and research process.]]>
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