The document discusses the social groups of gender and age that are identified in the author's thriller opening. Gender stereotypes presented include the female protagonist being portrayed as weaker than the male and more emotional. Age stereotypes include the teenage characters being loud and rebellious. The target audience research found that mainly girls wanted to watch the thriller, so a female protagonist was used, and faster pacing and action was included to appeal to older males. Stereotypical portrayals of the characters were intended to clearly identify them and their intentions to the audience.