Eating food more ____ leads to eating less food. This is especially true for _____.

To increase his sample size, Denzell asks parents of children in his study to nominate friends

that might also like to be in the study. This sampling method is known as: A) a sampling frame. B) simple random sampling. C) probability sampling. D) snowball or chain sampling.

Which of the following is true regarding invented spelling?

A) Children who use it before beginning formal schooling are more likely to become good spellers and readers later in childhood. B) Children should be discouraged from using it before they begin formal schooling. C) Children who use it are likely to develop learning disabilities. D) Children who use it too early are likely to be poor spellers throughout their lives.