This article is a report of the development of the Parental Stressor S
cale: Neonatal Intensive Care Unit (PSS:NICU), which is designed to me
asure parental perception of stressors arising from the physical and p
sychosocial environment of the neonatal intensive care unit. Stress th
eory, literature reviews, expert consultation, and parent interviews g
uided instrument development and refinement and established the conten
t validity of the instrument. Construct validity is supported by links
with theory, correlation with anxiety measures, and factor analytic r
esults. Alpha coefficients support the tool's internal consistency. Th
ree scales were identified Parental Role Alterations, Sights and Sound
s of the Unit, and Infant Behavior and Appearance, Available metrics a
llow scoring for stress occurrence levels, overall stress levels, and
number of stressors experienced. The PSS:NICU can serve as a research
or clinical measure to evaluate stressors experienced by parents with
infants in a NICU.