Physical aggression toward a child and a partner within the same family occ
urs more frequently than once thought, In community samples, the co-occurre
nce rate appears to be 5% to 6%; in clinical samples, it may be more than 5
0%. The possibility of causal connections between and common predictors of
the two problems is real. Despite data demonstrating a consistent relation
between aggression toward a child and aggression toward a partner, research
and clinical services are not well coordinated. We discuss ways research c
ould benefit from greater awareness of co-occurring aggression, comment on
issues related to assessing families for presence of co-occurring aggressio
n or abuse, and describe approaches to intervention that take advantage of
what we know about common correlates of parent and partner aggression. Fina
lly, we acknowledge fledgling collaborative efforts by service agencies to
keep both children and parents safe and offer suggestions for training clin
icians to address co-occurring aggression.