By the end of middle childhood, gross motor development will ____

A teacher is trying to see whether smiling at her students will increase the number of questions they ask. In the first and third week of the study, the number of questions students ask is recorded

In the second week, the teacher smiles a lot at her students, and the number of questions is also recorded. What type of research design is being used? a. within-subjects b. correlational c. placebo control d. between-subjects

Which of the following is NOT a valid criticism of the sociobiology and evolutionary psychology approaches?

a. Early arguments were derived from evidence but provided no theoretical interpretation. b. Some of the ideas are not falsifiable. c. Some of the ideas are not testable. d. All of these answers are valid criticisms.