________ is a type of research design that studies development by comparing groups of children of different ages against one another at the same point in time

________ is a state of tension that occurs when you hold either two cognitions that are psychologically inconsistent with one another, or a belief that is incongruent with your behavior

a. Dissonance b. Consonance c. A mental set d. Hindsight bias

In the past decade, wars have left _____ million children physically disabled and _____ million homeless

A) 1; 6 B) 2; 8 C) 3; 10 D) 6; 20