Increasing emphasis is being given to the construct of course structure in educational research. The Course Structure Inventory (CSI) was designed to measure this construct as a unitary dimension made up of student attitudes toward varying degrees and kinds of structure (ACS). In addition to measuring ACS, the CSI has the added advantage of measuring student tolerance for course difficulty (TFD) as an independent dimension, thereby avoiding the problem of confounding measures of structure and difficulty. The reported research sought to extend the validation of the CSI through correlating its measures with other personality traits commonly investigated in educational research. The ACS subscale was found to be significantly negatively correlated with a measure of arousal seeking tendency; the TFD subscale was significantly negatively correlated with a measure of test anxiety, but not with a measure of trait anxiety. These findings are discussed, along with earlier research findings involving the CSI, in concluding that the CSI is a useful measure of situational classroom personality. A copy of the CSI is included in the report. (Author)