Twelve-year-old ella will be in middle school next year. she will be going through many developmental changes in the next several years. define one of the developmental stages of each of the researchers below, and describe how it might apply to ella.
a. piaget's stages of cognitive development
b. erikson's stages of social development
c. kohlberg's stages of moral development

Panic attacks can be extremely disabling to the people who experience them. in a few sentences, describe the symptoms of panic disorder and why it can be so disabling in a person’s life.

How does a parent use active listening when communicating with a child

[120 total points] (public health) in one of the largest human experiments ever conducted, in 1954 a randomized controlled trial was run to see whether a vaccine developed by a doctor named jonas salk was effective in preventing paralytic polio. a total of 401,974 children (ages 6–9), chosen to be representative of those who might be susceptible to the disease, were randomized to two groups: 200,745 children (the control group c) were injected with a harmless saline solution (a placebo) and the other 201,229 children (the treatment group t) were injected with salk’s vaccine.what was the point of giving saline solution to the children who didn’t get the vaccine? explain briefly.