biostudies-literatureDavies PTEunice Kennedy Shriver National Institute of Child Health and Human DevelopmentNICHD NIH HHSNIMH NIH HHSNational Institute of Mental Health2016-2037https://www.ebi.ac.uk/biostudies/studies/S-EPMC11995458biostudies-literatureUnknown60(11)Temperamental sensitivity (TS), which is a correlated suite of traits reflecting a lower threshold of environmental stimulation and heightened responsivity to a range of environmental contexts, is an empirically documented susceptibility factor that increases children's plasticity to supportive and harsh family environments. To expand the limited options for assessing TS, this article tested the psychometric properties of a new Q-set measure (i.e., TS Q-scale) derived from the California Child Q-Set (CCQ-Set) and completed by experimenters. Participants in Study 1 consisted of 243 mothers, their partners, and their preschool children (<i>M</i>_age = 4.60 years; 56% girls; 54% Black or multiracial; 16% Latinx). For Study 2, participants included 201 mothers and their young childreDevelopmental psychologyAdvancing differential susceptibility research: Development and validation of the temperamental sensitivity Q-scale.PMC11995458R01 MH071256R01 HD065425Cao VTCicchetti DDavies PTSturge-Apple MLfalseAdvancing differential susceptibility research: Development and validation of the temperamental sensitivity Q-scale.Temperamental sensitivity (TS), which is a correlated suite of traits reflecting a lower threshold of environmental stimulation and heightened responsivity to a range of environmental contexts, is an empirically documented susceptibility factor that increases children's plasticity to supportive and harsh family environments. To expand the limited options for assessing TS, this article tested the psychometric properties of a new Q-set measure (i.e., TS Q-scale) derived from the California Child Q-Set (CCQ-Set) and completed by experimenters. Participants in Study 1 consisted of 243 mothers, their partners, and their preschool children (<i>M</i>_age = 4.60 years; 56% girls; 54% Black or multiracial; 16% Latinx). For Study 2, participants included 201 mothers and their young childre2024-01-01T00:00:00Z2024 Nov2026-06-05T07:27:35.923Z2026-05-14T03:12:29.98ZS-EPMC119954583866166510.1037/dev0001751