At what age would a pediatrician become concerned if a child was not talking at all?

Selective attention ______________

a. refers to the placement of things into meaningful categories b. refers to thinking about thinking c. refers to focusing on the relevant stimuli and ignoring what is irrelevant d. is a common measure of intelligence

According to the research, what is the biggest difference that's been found between only children and children with siblings?

a. Only children tend to perform less well in sports. b. Only children tend to inherit more money from their parents. c. Only children are more maladjusted. d. Only children tend to get divorced at higher rates.