Frances wishes to study the effects of violent videogames on children’s levels of aggression. As children come to the lab for the study, she flips a coin. If it turns up heads, the child plays a violent videogame. If it turns up tails, the child plays a nonviolent videogame. Frances has used the technique of

Random assignment technique

Explanation:

The options for this question are missing. The options are:

A. Creating matched pairs

B Random assignment

C. Correlated assignment

In research, the term random assignment refers to the use of chance procedures to make sure that each participant of the study is assigned to a random group. In other words, participants are assigned to random groups.

In this example, Frances wants to study the effects of violent videogames on children's levels of aggression. As children come to the lab, she flips a coin and if it's heads they play a video game. If it's tails, they play a non-violent video game. We can see that Frances is using a random method to assign the children to the groups (flipping a coin) and therefore they are assigned to random groups because she is using a chance procedure. Therefore she is using random assignment technique

i would say b probably

the 4th option is the answer