Psychometric Modeling of Psychological Assessments with Continuous Response Formats and Boundary Inflation

The presentation introduces a Beta-Bernoulli mixture item factor analytic model (BBM-IFA) for bounded-continuous items from continuous rating scales (CRS) and slider-bar assessments. Via simulation studies and an empirical case study of the Self-Determination Inventory, we show that the BBM-IFA can provide nuanced information about responses process from CRS/slider-bar assessments.