By pairing the ringing of a bell with the presentation of meat, Pavlov trained dogs to salivate to the sound of a bell even when no meat was presented. In this experiment, the ringing of the bell was the _______

"Cells that fire together, wire together" is a brief summary of

a. Hebb's rule. b. synaptic integration. c. neural communication. d. frequency coding.

Which of the following is true about the basic factors of personality?

a. They are measured by the 16 PF Test. c. They are source traits. b. They can be tested objectively. d. All of these are correct.