This study included brief functional analyses and treatment for motor tics exhibited by two children with Tourette Syndrome. Brief functional analyses were conducted in an outpatient treatment center and results were used to develop individualized habit reversal procedures. Treatment data were collected in clinic for one child and in clinic and school for the other child. Brief functional analysis results were mixed for each child, but provided useful information for informing unique habit reversal components for each child. Treatment results indicated reductions in motor tics for each child. Results are discussed in terms of utility of functional analysis for tics. (Contains 5 figures.)