The Harvard definition of death defines death in terms of respiration and heart functioning

_____ came up with the law of effect after studying hungry cats in his puzzle box

Fill in the blank with correct word

In an experiment to test whether teaching a new memory strategy will improve students' test scores, student characteristics, such as motivation, are controlled by

a. interviewing each student concerning their motivation in the class. b. giving each student a personality test. c. randomly assigning students to the two groups. d. interviewing the teachers concerning each of the students.