Perry LM, et al. - Researchers sought to develop and validate a nine-item scale measuring patient attitudes toward Palliative Care, composed of three subscales spanning emotional, cognitive, and behavioral factors. They targeted individuals with cancer (Sample 1: N = 633; Sample 2: N = 462) or noncancer serious illnesses (Sample 3: N = 225) for obtaining data online in three separate waves. For the total scale and subscales, acceptable internal consistency was observed (α = 0.84): emotional (α = 0.84), cognitive (αs = 0.70), and behavioral (α = 0.90). They identified a significant association of the PCAS-9 with a separate measure of Palliative Care attitudes (ps < 0.001) and a measure of Palliative Care knowledge (ps < 0.004); this supports its construct validity in samples of cancer and noncancer serious illnesses. Based on the diagnosis, other health characteristics, and demographics, the scale's psychometric properties, including internal consistency and factor structure, generalized across patient subgroups. The PCAS-9 is thus supported as overall reliable, valid, and generalizable in serious illness samples and have implications for improving Palliative Care utilization via clinical care and future research efforts.