The development of the Test of Logical Thinking (TOLT), a group test of formal reasoning ability that requires students to solve problems and to justify the solutions obtained, is presented. Procedures are described for investigations of internal consistency, construct validity, and criterion-related validity. Items used in prior research serve as…

Describes development and validation of a 24-item test which assesses student performance on a set of 12 objectives related to planning and constructing an investigation. In addition to sound psychometric properties, the test is distinctive because it includes a set of interrelated cumulative objectives which reflect autonomous problem solving.…