In the 1940s study of Johns Hopkins medical students, which temperament was found to be the biggest risk factor for serious health problems and even death?

The most frequent expression of an infant's fear involves

A. neglect. B. anger. C. abuse. D. stranger anxiety.

Madeline, a preschooler, has just learned how to use the buttons on the remote control to change the channels on the television. Madeline loves to give demonstrations

She says, "First you pick up the remote and you make it look at the television and push a button…See, that's how it works!" This is an example of a. egocentric thought. c. identity. b. functionality. d. conservation.