Dr. kid is studying the effects of sleep on a child's reading speed. she initially takes a measure of each child's reading speed. next, she varies the amount of sleep different children get. finally, she re-measures their reading speed. what is the independent variable in her study?

Which of the following statements is true regarding adolescent ethnicity and self-esteem? select one: a. teens of all ethnicities in the u.s. are likely to experience a brief increase in self-esteem as they transition into early adolescence. b. teens of all ethnicities in the u.s. are likely to experience a drop in self-esteem as they transition from childhood to early adolescence. c. ehtnic minority teens in the u.s. are likely to experience a drop in self-esteem as they transition from childhood to early adolescence.