Affective style (AS) and communication deviance (CD) have been suggest
ed as markers of dysfunctional family environments that may be associa
ted with psychiatric illness. Studies have focused mainly on parental
responses during family interactions when an offspring is the identifi
ed patient. The present study is unique in examining AS and CD in moth
ers with unipolar depression, bipolar disorder, or chronic physical il
lness, and in normal controls. The sample consisted of 64 mothers with
children ages 8 to 16. Unipolar mothers were more likely to show nega
tive AS than were any other maternal group. There were no group differ
ences for CD. Chronic stress, few positive life events, and single par
enting were associated with AS. CD was associated solely with lower so
cioeconomic status. Results suggest that dysfunctional interactions ar
e determined not only by maternal psychopathology, but also by an arra
y of contextual factors that are related to the quality of the family
environment.