What metaphor did Freud use for consciousness?

Among the diverse strategies available for helping at-risk teenagers, which of the following is among the most successful for preventing dropout?

A) requiring extracurricular involvement B) putting students in larger classes C) offering remedial instruction in small classes D) using standardized testing instead of grades to determine who graduates

Margarita is conducting research as part of her Master's thesis. She enlists the participation of undergraduate students in her laboratory, has them go through a series of activities, and then tells them what the true intent of the research was before they leave. She does not, however, inform them what their participation will involve before the research begins. Margarita has failed to remember

the importance of a. informed consent. b. debriefing. c. an institutional review board. d. experimental realism.