Exposure to neurobehavioral toxicants is a problem of international sc
ope. Although many different procedures are available for the assessme
nt of human behavioral function, performance tests are displacing trad
itional diagnostic tests for ascertaining the consequences of exposure
to neurotoxic chemicals. Performance testing includes variables such
as attention and concentration, sensory function, motor control, spati
al relations, visuomotor coordination, memory, and affect. Special tes
ts have also been devised for evaluating child development. One of the
salient needs in these efforts is the construction of databases allow
ing access to normative data.