Dr. Ledder conducts research on intelligence and problem-solving skills of fourth-grade children. His research area best fits into which of the following domains of learning?

Harmony notices that her cat salivates as soon as her cat hears the sound of Harmony opening a can with an electric can opener. In this example, the _______________ is the conditioned stimulus

a) can of cat food b) sound of the electric can opener c) dish that Harmony puts the food in d) cat scurrying into the kitchen

Compared to artificial concepts learned in science and math, natural concepts tend to be

a. easier to learn. b. very clear and well defined. c. fuzzy with unclear boundaries. d. good fits with a rigid classification system. e. biologically innate.