Aresearcher wants to observe preschoolers at a local public playground to evaluate levels of cooperation. the researcher will not interact with the children. this research would be eligible for which type of irb review?

22. the effect of threshold braking is to a. cause skids. b. lock wheels. c. prevent locking of wheels. d. increase stopping distance.

Section 1: this section deals with the possible implications (consequences) of sexual activity or abstinence for a teenager. 1. being sexually active can impact teenagers emotionally. in a complete paragraph, discuss one emotional impact of sexual activity. remember to refer to facts you’ve learned to answer the question. (10 points) 2. choices we make affect our health. in a complete paragraph, discuss a possible health consequence for sexually active teens. remember to refer to facts you’ve learned to answer the question. (10 points) 3. throughout this course, we have discussed goal setting. in a complete paragraph, discuss how sexual involvement can change or potentially influence a teen’s goals? (15 points) 4. in a complete paragraph, explain how your value system impacts your choices about abstinence versus sexual activity. (15 points)

Dr. laguardia is a cognitive neuroscientist who is interested in the effect of brain concussions on the ability to recognize faces. he conducts a quasi-experimental study in which he examines football players before and after the regular season using the benton facial recognition test (a published, widely used measure of one's ability to recognize faces) to compare those who received concussions to those who did not. he finds that players who had concussions during the regular season performed worse on the benton facial recognition test than did players who did not experience which of the following is true regarding external validity in dr. laguardia's study? a. because dr. laguardia selected participants who actually experienced concussions, the study b. because dr. laguardia's study is a quasi-experiment, it is impossible to obtain c. because dr. laguardia's dependent variable was assessed in the laboratory, the study d. because dr. laguardia selected a widely used measure, his study generalizes to has strong external validity. external validity has limited external validity. other applications of this measure.