Weber's Law is I/I = K; and values for K are: .02 for weight; .08 for brightness; and .03 for length. If a line is 30" long, what is the minimum change in length before one would notice a difference between the two?

A method of studying developmental changes by evaluating the same people at different points in their lives is a ________ study

a) longitudinal b) cohort c) biographical d) lifespan

According to Piaget, more advanced mental structures would not develop without

a. reinforcement. c. imitation. b. short-term storage space. d. disequilibrium.