In __________ experiments, control over the treatment is usually weaker than in __________ experiments

Several studies have shown that heritability estimates for some cognitive skills ____________ with age

A) decrease B) are not correlated with C) increase D) first increase, and then decrease

Sheri wants to play dolls with the other girls. She starts by watching and waiting to be asked to join. Then she gradually joins in after being asked. She eases into the group, but she does not disrupt what they are doing

Sheri is most likely in which category of peer popularity? A) Average B) Social C) Popular D) Assertive